versions: Update version to 4.2.5

pm: fix RTC IO and MEM issues under high temperature(v4.2)

See merge request espressif/esp-idf!24252

.flake8

@@ -141,17 +141,20 @@ exclude =
     __pycache__,
     # submodules
         components/bootloader/subproject/components/micro-ecc/micro-ecc,
+        components/bt/host/nimble/nimble,
         components/esptool_py/esptool,
         components/expat/expat,
         components/json/cJSON,
         components/libsodium/libsodium,
         components/mbedtls/mbedtls,
         components/nghttp/nghttp2,
-        components/bt/host/nimble/nimble,
+        components/tinyusb,
         components/unity/unity,
         examples/build_system/cmake/import_lib/main/lib/tinyxml2,
+        examples/peripherals/secure_element/atecc608_ecdsa/components/esp-cryptoauthlib,
     # other third-party libraries
         tools/kconfig_new/kconfiglib.py,
+        tools/kconfig_new/menuconfig.py,
     # autogenerated scripts
         components/protocomm/python/constants_pb2.py,
         components/protocomm/python/sec0_pb2.py,
@@ -161,4 +164,4 @@ exclude =
         components/wifi_provisioning/python/wifi_config_pb2.py,
         components/wifi_provisioning/python/wifi_constants_pb2.py,
         components/esp_local_ctrl/python/esp_local_ctrl_pb2.py,
-        examples/provisioning/custom_config/components/custom_provisioning/python/custom_config_pb2.py,
+        examples/provisioning/legacy/custom_config/components/custom_provisioning/python/custom_config_pb2.py,

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,6 +1,15 @@
+---
+name: Bug report
+about: ESP-IDF crashes, produces incorrect output, or has incorrect behavior
+title: ''
+labels: ''
+assignees: ''
+
+---
+
 ----------------------------- Delete below -----------------------------
 
-If your issue is a general question, starts similar to "How do I..", or is related to 3rd party development kits/libs, please discuss this on our community forum at esp32.com instead.
+**Reminder: If your issue is a general question, starts similar to "How do I..", or is related to 3rd party development kits/libs, please discuss this on our community forum at https://esp32.com instead.**
 
 INSTRUCTIONS
 ============
@@ -15,11 +24,13 @@ If the issue cannot be solved after the steps before, please follow these instru
 
 1. Fill in all the fields under **Environment** marked with [ ] by picking the correct option for you in each case and deleting the others.
 2. Describe your problem.
-3. Include [debug logs on the monitor](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html#automatically-decoding-addresses) or the [coredump](https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/core_dump.html).
-4. Provide more items under **Other items if possible** can help us better locate your problem.
-5. Use markup (buttons above) and the Preview tab to check what the issue will look like.
+3. Include [debug logs from the "monitor" tool](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html#automatically-decoding-addresses), or [coredumps](https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/core_dump.html).
+4. Providing as much information as possible under **Other items if possible** will help us locate and fix the problem.
+5. Use [Markdown](https://guides.github.com/features/mastering-markdown/) (see formatting buttons above) and the Preview tab to check what the issue will look like.
 6. Delete these instructions from the above to the below marker lines before submitting this issue.
 
+**IMPORTANT: If you do not follow these instructions and provide the necessary details, your issue may not be resolved.**
+
 ----------------------------- Delete above -----------------------------
 
 ## Environment
@@ -29,10 +40,12 @@ If the issue cannot be solved after the steps before, please follow these instru
 - Module or chip used:  [ESP32-WROOM-32|ESP32-WROOM-32D|ESP32-WROOM-32U|ESP32-WROVER|ESP32-WROVER-I|ESP32-WROVER-B|ESP32-WROVER-IB|ESP32-SOLO-1|ESP32-PICO-D4|ESP32]
 - IDF version (run ``git describe`` to find it):
     // v3.2-dev-1148-g96cd3b75c
-- Build System:         [Make|CMake]
+- Build System:         [Make|CMake|idf.py]
 - Compiler version (run ``xtensa-esp32-elf-gcc --version`` to find it):
     // 1.22.0-80-g6c4433a
 - Operating System:     [Windows|Linux|macOS]
+- (Windows only) environment type: [MSYS2 mingw32|ESP Command Prompt|Plain Command Prompt|PowerShell].
+- Using an IDE?: [No|Yes (please give details)]
 - Power Supply:         [USB|external 5V|external 3.3V|Battery]
 
 ## Problem Description
@@ -43,12 +56,12 @@ If the issue cannot be solved after the steps before, please follow these instru
 
 ### Actual Behavior
 
-### Steps to repropduce
+### Steps to reproduce
 
 1. step1
 2. ...
 
-// It helps if you attach a picture of your setup/wiring here.
+// If possible, attach a picture of your setup/wiring here.
 
 
 ### Code to reproduce this issue
@@ -59,7 +72,7 @@ If the issue cannot be solved after the steps before, please follow these instru
 
 void app_main()
 {
-    
+
 }
 
 ```
@@ -76,5 +89,4 @@ Please copy the plain text here for us to search the error log. Or attach the co
 
 - [ ] sdkconfig file (attach the sdkconfig file from your project folder)
 - [ ] elf file in the ``build`` folder (**note this may contain all the code details and symbols of your project.**)
-- [ ] coredump (This provides stacks of tasks.) 
-
+- [ ] coredump (This provides stacks of tasks.)

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,16 @@
+blank_issues_enabled: false
+contact_links:
+  - name: ESP-IDF Programming Guide
+    url: https://docs.espressif.com/projects/esp-idf/en/latest/
+    about: Documentation for configuring and using ESP-IDF
+  - name: Espressif documentation page
+    url: https://www.espressif.com/en/support/download/documents
+    about: Hardware documentation (datasheets, Technical Reference Manual, etc)
+  - name: Forum
+    url: https://esp32.com
+    about: For questions about using ESP-IDF and/or ESP32 series chips. Please submit all questions starting "How do I..." here.
+  - name: Hardware-related services
+    url: https://www.espressif.com/en/products/hardware-services
+    about: Espressif service providing hardware design and certification support
+
+

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,26 @@
+---
+name: Feature request
+about: Suggest an idea for ESP-IDF
+title: ''
+labels: 'Type: Feature Request'
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+
+A clear and concise description of any alternative solutions or features you've considered.
+
+Please give as many details as you can. Include suggestions for useful APIs or interfaces if relevant.
+
+**Additional context**
+
+Add any other context or screenshots about the feature request here.

.github/main.workflow

@@ -1,22 +0,0 @@
-workflow "Sync issues to JIRA" {
-  on = "issues"
-  resolves = ["Sync to JIRA"]
-}
-
-workflow "Sync issue and PR comments to JIRA" {
-  on = "issue_comment"
-  resolves = ["Sync to JIRA"]
-}
-
-workflow "Sync PRs to JIRA" {
-  on = "pull_request"
-  resolves = ["Sync to JIRA"]
-}
-
-action "Sync to JIRA" {
-  uses = "espressif/github-actions/sync_issues_to_jira@master"
-  secrets = ["GITHUB_TOKEN", "JIRA_URL", "JIRA_USER", "JIRA_PASS"]
-  env = {
-    JIRA_PROJECT = "IDFGH"
-  }
-}

.github/workflows/docker.yml

@@ -0,0 +1,87 @@
+name: docker
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+
+on:
+  push:
+    branches:
+      - 'master'
+      - 'release/*'
+    tags:
+      - 'v*.*'
+
+env:
+  # Platforms to build the image for
+  BUILD_PLATFORMS: linux/amd64
+  DOCKERHUB_REPO: ${{ github.repository_owner }}/idf
+
+jobs:
+  docker:
+    # Disable the job in forks
+    if: ${{ github.repository_owner == 'espressif' }}
+
+    runs-on: ubuntu-latest
+    steps:
+      # Depending on the branch/tag, set CLONE_BRANCH_OR_TAG variable (used in the Dockerfile
+      # as a build arg) and TAG_NAME (used when tagging the image).
+      #
+      # The following 3 steps cover the alternatives (tag, release branch, master branch):
+      - name: Set variables (tags)
+        if: ${{ github.ref_type == 'tag' }}
+        run: |
+          echo "CLONE_BRANCH_OR_TAG=$GITHUB_REF_NAME" >> $GITHUB_ENV
+          echo "TAG_NAME=$GITHUB_REF_NAME" >> $GITHUB_ENV
+      - name: Set variables (release branches)
+        if: ${{ github.ref_type == 'branch' && startsWith(github.ref_name, 'release/') }}
+        run: |
+          echo "CLONE_BRANCH_OR_TAG=$GITHUB_REF_NAME" >> $GITHUB_ENV
+          echo "TAG_NAME=release-${GITHUB_REF_NAME##release/}" >> $GITHUB_ENV
+      - name: Set variables (main branch)
+        if: ${{ github.ref_type == 'branch' && github.ref_name == 'master' }}
+        run: |
+          echo "CLONE_BRANCH_OR_TAG=master" >> $GITHUB_ENV
+          echo "TAG_NAME=latest" >> $GITHUB_ENV
+
+      # Display the variables set above, just in case.
+      - name: Check variables
+        run: |
+          echo "CLONE_BRANCH_OR_TAG: $CLONE_BRANCH_OR_TAG"
+          echo "CHECKOUT_REF: $CHECKOUT_REF"
+          echo "TAG_NAME: $TAG_NAME"
+
+      # The following steps are the standard boilerplate from
+      # https://github.com/marketplace/actions/build-and-push-docker-images
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Set up QEMU for multiarch builds
+        uses: docker/setup-qemu-action@v2
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Build and push
+        uses: docker/build-push-action@v3
+        with:
+          context: tools/docker
+          push: true
+          tags: ${{ env.DOCKERHUB_REPO }}:${{ env.TAG_NAME }}
+          platforms: ${{ env.BUILD_PLATFORMS }}
+          build-args: |
+            IDF_CLONE_URL=${{ github.server_url }}/${{ github.repository }}.git
+            IDF_CLONE_BRANCH_OR_TAG=${{ env.CLONE_BRANCH_OR_TAG }}
+
+      - name: Update Docker Hub repository description (master branch)
+        if: ${{ github.ref_type == 'branch' && github.ref_name == 'master' }}
+        uses: peter-evans/dockerhub-description@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          # Token based authentication is not supported here:
+          # https://github.com/peter-evans/dockerhub-description/issues/10
+          # https://github.com/docker/roadmap/issues/115#issuecomment-891694974
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+          repository: ${{ env.DOCKERHUB_REPO }}
+          readme-filepath: ./tools/docker/README.md

.github/workflows/issue_comment.yml

@@ -0,0 +1,19 @@
+name: Sync issue comments to JIRA
+
+# This workflow will be triggered when new issue comment is created (including PR comments)
+on: issue_comment
+
+jobs:
+  sync_issue_comments_to_jira:
+    name: Sync Issue Comments to Jira
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Sync issue comments to JIRA
+        uses: espressif/github-actions/sync_issues_to_jira@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          JIRA_PASS: ${{ secrets.JIRA_PASS }}
+          JIRA_PROJECT: IDFGH
+          JIRA_URL: ${{ secrets.JIRA_URL }}
+          JIRA_USER: ${{ secrets.JIRA_USER }}

.github/workflows/new_issues.yml

@@ -0,0 +1,19 @@
+name: Sync issues to Jira
+
+# This workflow will be triggered when a new issue is opened
+on: issues
+
+jobs:
+  sync_issues_to_jira:
+    name: Sync issues to Jira
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Sync GitHub issues to Jira project
+        uses: espressif/github-actions/sync_issues_to_jira@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          JIRA_PASS: ${{ secrets.JIRA_PASS }}
+          JIRA_PROJECT: IDFGH
+          JIRA_URL: ${{ secrets.JIRA_URL }}
+          JIRA_USER: ${{ secrets.JIRA_USER }}

.github/workflows/new_prs.yml

@@ -0,0 +1,24 @@
+name: Sync remain PRs to Jira
+
+# This workflow will be triggered every hour, to sync remaining PRs (i.e. PRs with zero comment) to Jira project
+# Note that, PRs can also get synced when new PR comment is created
+on:
+  schedule:
+    - cron: "0 * * * *"
+
+jobs:
+  sync_prs_to_jira:
+    name: Sync PRs to Jira
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Sync PRs to Jira project
+        uses: espressif/github-actions/sync_issues_to_jira@master
+        with:
+          cron_job: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          JIRA_PASS: ${{ secrets.JIRA_PASS }}
+          JIRA_PROJECT: IDFGH
+          JIRA_URL: ${{ secrets.JIRA_URL }}
+          JIRA_USER: ${{ secrets.JIRA_USER }}

.github/workflows/python_lint.yml

@@ -0,0 +1,33 @@
+name: Python CI
+
+# This workflow will be triggered when a PR modifies some python relevant files
+on:
+  pull_request:
+    paths:
+      - "**.py"
+      - "requirements.txt"
+
+jobs:
+  python_lint:
+    name: python lint
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Set up Python environment
+        uses: actions/setup-python@master
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          export IDF_PATH=${GITHUB_WORKSPACE}
+          pip install --upgrade pip
+          pip install -r requirements.txt
+      - name: Lint with flake8
+        run: |
+          pip install flake8
+          flake8 . --config=.flake8 --benchmark

.gitignore

@@ -27,13 +27,7 @@ examples/**/sdkconfig.old
 examples/**/build
 
 # Doc build artifacts
-docs/*/_build/
-docs/*/doxygen-warning-log.txt
-docs/*/sphinx-warning-log.txt
-docs/*/sphinx-warning-log-sanitized.txt
-docs/*/xml/
-docs/*/xml_in/
-docs/*/man/
+docs/_build/
 docs/doxygen_sqlite3.db
 
 # Downloaded font files
@@ -46,6 +40,15 @@ tools/unit-test-app/sdkconfig.old
 tools/unit-test-app/build
 tools/unit-test-app/builds
 tools/unit-test-app/output
+tools/unit-test-app/test_configs
+
+# Unit Test CMake compile log folder
+log_ut_cmake
+
+# test application build files
+tools/test_apps/**/build
+tools/test_apps/**/sdkconfig
+tools/test_apps/**/sdkconfig.old
 
 # IDF monitor test
 tools/test_idf_monitor/outputs
@@ -63,8 +66,23 @@ test_multi_heap_host
 # VS Code Settings
 .vscode/
 
-# Results for the checking of the Python coding style
+# VIM files
+*.swp
+*.swo
+
+# Clion IDE CMake build & config
+.idea/
+cmake-build-*/
+
+# Results for the checking of the Python coding style and static analysis
+.mypy_cache
 flake8_output.txt
 
-# ESP-IDF library 
+# ESP-IDF default build directory name
 build
+
+# lock files for examples and components
+dependencies.lock
+
+# managed_components for examples
+managed_components

.gitlab-ci.yml

@@ -1,11 +1,12 @@
 stages:
+  - pre_check
   - build
   - assign_test
   - host_test
   - target_test
-  - check
-  - deploy
   - post_check
+  - deploy
+  - post_deploy
 
 # pipelines will not be created in such two cases:
 # 1. MR push
@@ -44,7 +45,6 @@ variables:
   # tell build system do not check submodule update as we download archive instead of clone
   IDF_SKIP_CHECK_SUBMODULES: 1
 
-  UNIT_TEST_BUILD_SYSTEM: cmake
   IDF_PATH: "$CI_PROJECT_DIR"
   BATCH_BUILD: "1"
   V: "0"
@@ -57,20 +57,20 @@ variables:
   CI_TARGET_TEST_CONFIG_FILE: "$CI_PROJECT_DIR/tools/ci/config/target-test.yml"
   # target test repo parameters
   TEST_ENV_CONFIG_REPO: "https://gitlab-ci-token:${BOT_TOKEN}@${CI_SERVER_HOST}:${CI_SERVER_PORT}/qa/ci-test-runner-configs.git"
-  CI_AUTO_TEST_SCRIPT_REPO_URL: "https://gitlab-ci-token:${BOT_TOKEN}@${CI_SERVER_HOST}:${CI_SERVER_PORT}/qa/auto_test_script.git"
-  CI_AUTO_TEST_SCRIPT_REPO_BRANCH: "ci/v3.1"
 
-# Versioned esp-idf-doc env image to use for all document building jobs
+  # Versioned esp-idf-doc env image to use for all document building jobs
   ESP_IDF_DOC_ENV_IMAGE: "$CI_DOCKER_REGISTRY/esp-idf-doc-env:v7"
 
 
-
 # before each job, we need to check if this job is filtered by bot stage/job filter
 .apply_bot_filter: &apply_bot_filter
   python $APPLY_BOT_FILTER_SCRIPT || exit 0
 
 .setup_tools_unless_target_test: &setup_tools_unless_target_test |
-  if [ "$CI_JOB_STAGE" != "target_test" ]; then
+  if [[ -n "$IDF_DONT_USE_MIRRORS" ]]; then
+  export IDF_MIRROR_PREFIX_MAP=
+  fi
+  if [[ "$SETUP_TOOLS" == "1" || "$CI_JOB_STAGE" != "target_test" ]]; then
   tools/idf_tools.py --non-interactive install && eval "$(tools/idf_tools.py --non-interactive export)" || exit 1
   fi
 
@@ -78,6 +78,8 @@ variables:
   python $SUBMODULE_FETCH_TOOL -s $SUBMODULES_TO_FETCH
 
 before_script:
+  - source tools/ci/utils.sh
+  - is_based_on_commits $REQUIRED_ANCESTOR_COMMITS
   - source tools/ci/setup_python.sh
   # apply bot filter in before script
   - *apply_bot_filter
@@ -91,7 +93,6 @@ before_script:
   # Set some options and environment for CI
   - source tools/ci/configure_ci_environment.sh
   - *setup_tools_unless_target_test
-
   - *fetch_submodules
 
 # used for check scripts which we want to run unconditionally
@@ -100,6 +101,8 @@ before_script:
     GIT_SUBMODULE_STRATEGY: none
   before_script:
     - echo "Not setting up GitLab key, not fetching submodules, not applying bot filter"
+    - source tools/ci/utils.sh
+    - is_based_on_commits $REQUIRED_ANCESTOR_COMMITS
     - source tools/ci/setup_python.sh
     - source tools/ci/configure_ci_environment.sh
 
@@ -109,13 +112,15 @@ before_script:
     GIT_SUBMODULE_STRATEGY: none
   before_script:
     - echo "Not setting up GitLab key, not fetching submodules"
+    - source tools/ci/utils.sh
+    - is_based_on_commits $REQUIRED_ANCESTOR_COMMITS
     - source tools/ci/setup_python.sh
     # apply bot filter in before script
     - *apply_bot_filter
     - source tools/ci/configure_ci_environment.sh
 
 .check_job_template:
-  stage: check
+  stage: pre_check
   image: $CI_DOCKER_REGISTRY/esp32-ci-env$BOT_DOCKER_IMAGE_TAG
   tags:
     - host_test
@@ -123,12 +128,43 @@ before_script:
   extends: .before_script_lesser_nofilter
 
 .check_job_template_with_filter:
-  stage: check
+  stage: pre_check
   image: $CI_DOCKER_REGISTRY/esp32-ci-env$BOT_DOCKER_IMAGE_TAG
   tags:
     - host_test
   dependencies: []
-  extends: .before_script_lesser_nofilter
+  extends: .before_script_lesser
+
+.python_lint_template:
+  stage: pre_check
+  image: $CI_DOCKER_REGISTRY/esp32-ci-env$BOT_DOCKER_IMAGE_TAG
+  tags:
+    - host_test
+  dependencies: []
+
+.macos_build_template:
+  stage: build
+  tags:
+    - macos_shell
+  dependencies: []
+  before_script:
+    - source tools/ci/utils.sh
+    - is_based_on_commits $REQUIRED_ANCESTOR_COMMITS
+    - *apply_bot_filter
+    - export IDF_TOOLS_PATH="${HOME}/.espressif_runner_${CI_RUNNER_ID}_${CI_CONCURRENT_ID}"
+    # Clean up idf-env.json which might not be compatible with one produced by newer ESP-IDF versions
+    - rm -f ${IDF_TOOLS_PATH}/idf-env.json
+    - $IDF_PATH/tools/idf_tools.py install-python-env
+    # On macOS, these tools need to be installed
+    - $IDF_PATH/tools/idf_tools.py --non-interactive install cmake ninja
+    # This adds tools (compilers) and the version-specific Python environment to PATH
+    - *setup_tools_unless_target_test
+    # Install packages required by CI scripts into IDF Python environment
+    - pip install -r $IDF_PATH/tools/ci/python_packages/ttfw_idf/requirements.txt
+    - source tools/ci/configure_ci_environment.sh
+    # Part of tools/ci/setup_python.sh; we don't use pyenv on macOS, so can't run the rest of the script.
+    - export PYTHONPATH="$IDF_PATH/tools:$IDF_PATH/tools/ci/python_packages:$PYTHONPATH"
+    - *fetch_submodules
 
 default:
   retry:
@@ -137,9 +173,11 @@ default:
     when: runner_system_failure
 
 include:
+  - '/tools/ci/config/pre_check.yml'
   - '/tools/ci/config/build.yml'
   - '/tools/ci/config/assign-test.yml'
   - '/tools/ci/config/host-test.yml'
   - '/tools/ci/config/target-test.yml'
-  - '/tools/ci/config/check.yml'
+  - '/tools/ci/config/post_check.yml'
   - '/tools/ci/config/deploy.yml'
+  - '/tools/ci/config/post_deploy.yml'

.gitmodules

@@ -67,10 +67,22 @@
 	path = examples/build_system/cmake/import_lib/main/lib/tinyxml2
 	url = ../../leethomason/tinyxml2.git
 
-[submodule "components/esp_wifi/lib_esp32"]
-	path = components/esp_wifi/lib_esp32
-	url = ../../espressif/esp32-wifi-lib.git
-
 [submodule "components/bt/host/nimble/nimble"]
 	path = components/bt/host/nimble/nimble
 	url = ../../espressif/esp-nimble.git
+
+[submodule "components/cbor/tinycbor"]
+	path = components/cbor/tinycbor
+	url = ../../intel/tinycbor.git
+
+[submodule "components/esp_wifi/lib"]
+	path = components/esp_wifi/lib
+	url = ../../espressif/esp32-wifi-lib.git
+
+[submodule "components/tinyusb/tinyusb"]
+	path = components/tinyusb/tinyusb
+	url = ../../espressif/tinyusb.git
+
+[submodule "examples/peripherals/secure_element/atecc608_ecdsa/components/esp-cryptoauthlib"]
+	path = examples/peripherals/secure_element/atecc608_ecdsa/components/esp-cryptoauthlib
+	url = ../../espressif/esp-cryptoauthlib.git

.travis.yml

@@ -1,7 +0,0 @@
-language: python
-sudo: false
-python:
-  - "3.4"
-script:
-  - pip install flake8
-  - travis_wait 20 python -m flake8 --config=.flake8 .

CMakeLists.txt

@@ -16,11 +16,32 @@ unset(link_options)
 # Add the following build specifications here, since these seem to be dependent
 # on config values on the root Kconfig.
 
-if(CONFIG_COMPILER_OPTIMIZATION_LEVEL_RELEASE)
-    list(APPEND compile_options "-Os")
-    list(APPEND compile_options "-freorder-blocks")
-else()
-    list(APPEND compile_options "-Og")
+if(NOT BOOTLOADER_BUILD)
+
+    if(CONFIG_COMPILER_OPTIMIZATION_SIZE)
+        list(APPEND compile_options "-Os")
+        list(APPEND compile_options "-freorder-blocks")
+    elseif(CONFIG_COMPILER_OPTIMIZATION_DEFAULT)
+        list(APPEND compile_options "-Og")
+    elseif(CONFIG_COMPILER_OPTIMIZATION_NONE)
+        list(APPEND compile_options "-O0")
+    elseif(CONFIG_COMPILER_OPTIMIZATION_PERF)
+        list(APPEND compile_options "-O2")
+    endif()
+
+else()  # BOOTLOADER_BUILD
+
+    if(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_SIZE)
+        list(APPEND compile_options "-Os")
+        list(APPEND compile_options "-freorder-blocks")
+    elseif(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_DEBUG)
+        list(APPEND compile_options "-Og")
+    elseif(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_NONE)
+        list(APPEND compile_options "-O0")
+    elseif(CONFIG_BOOTLOADER_COMPILER_OPTIMIZATION_PERF)
+        list(APPEND compile_options "-O2")
+    endif()
+
 endif()
 
 if(CONFIG_COMPILER_CXX_EXCEPTIONS)
@@ -41,19 +62,20 @@ if(CONFIG_COMPILER_DISABLE_GCC8_WARNINGS)
                                 "-Wno-sizeof-pointer-memaccess"
                                 "-Wno-clobbered")
 
-    # doesn't use GCC_NOT_5_2_0 because idf_set_global_variables was not called before
-    if(GCC_NOT_5_2_0)
-        list(APPEND compile_options "-Wno-format-overflow"
-                                    "-Wno-stringop-truncation"
-                                    "-Wno-misleading-indentation"
-                                    "-Wno-cast-function-type"
-                                    "-Wno-implicit-fallthrough"
-                                    "-Wno-unused-const-variable"
-                                    "-Wno-switch-unreachable"
-                                    "-Wno-format-truncation"
-                                    "-Wno-memset-elt-size"
-                                    "-Wno-int-in-bool-context")
-    endif()
+    list(APPEND compile_options "-Wno-format-overflow"
+                                "-Wno-stringop-truncation"
+                                "-Wno-misleading-indentation"
+                                "-Wno-cast-function-type"
+                                "-Wno-implicit-fallthrough"
+                                "-Wno-unused-const-variable"
+                                "-Wno-switch-unreachable"
+                                "-Wno-format-truncation"
+                                "-Wno-memset-elt-size"
+                                "-Wno-int-in-bool-context")
+endif()
+
+if(CONFIG_COMPILER_WARN_WRITE_STRINGS)
+    list(APPEND compile_options "-Wwrite-strings")
 endif()
 
 if(CONFIG_COMPILER_OPTIMIZATION_ASSERTIONS_DISABLE)

CONTRIBUTING.rst

@@ -6,7 +6,7 @@ We welcome contributions to the esp-idf project!
 How to Contribute
 -----------------
 
-Contributions to esp-idf - fixing bugs, adding features, adding documentation - are welcome. We accept contributions via `Github Pull Requests <https://help.github.com/articles/about-pull-requests/>`_.
+Contributions to esp-idf - fixing bugs, adding features, adding documentation - are welcome. We accept contributions via `Github Pull Requests <https://help.github.com/en/github/collaborating-with-issues-and-pull-requests/about-pull-requests>`_.
 
 Before Contributing
 -------------------
@@ -27,7 +27,7 @@ Before sending us a Pull Request, please consider this list of points:
 
 * Example contributions are also welcome. Please check the :doc:`creating-examples` guide for these.
 
-* If the contribution contains multiple commits, are they grouped together into logical changes (one major change per pull request)? Are any commits with names like "fixed typo" `squashed into previous commits <http://eli.thegreenplace.net/2014/02/19/squashing-github-pull-requests-into-a-single-commit/>`_?
+* If the contribution contains multiple commits, are they grouped together into logical changes (one major change per pull request)? Are any commits with names like "fixed typo" `squashed into previous commits <https://eli.thegreenplace.net/2014/02/19/squashing-github-pull-requests-into-a-single-commit/>`_?
 
 * If you're unsure about any of these points, please open the Pull Request anyhow and then ask us for feedback.
 

Kconfig

@@ -4,21 +4,13 @@
 #
 mainmenu "Espressif IoT Development Framework Configuration"
 
-    # Hidden option to support checking for this specific target in C code and Kconfig files
-    config IDF_TARGET_ESP32
-        bool
-        default "y" if IDF_TARGET="esp32"
-        default "n"
-
     config IDF_CMAKE
         bool
         option env="IDF_CMAKE"
 
-
-    config IDF_TARGET_ENV
-        # A proxy to get environment variable $IDF_TARGET
-        string
-        option env="IDF_TARGET"
+    config IDF_ENV_FPGA
+        # This option is for internal use only
+        bool
 
     config IDF_TARGET
         # This option records the IDF target when sdkconfig is generated the first time.
@@ -26,18 +18,28 @@ mainmenu "Espressif IoT Development Framework Configuration"
         # the build system is responsible for detecting the mismatch between
         # CONFIG_IDF_TARGET and $IDF_TARGET.
         string
-        default "IDF_TARGET_NOT_SET" if IDF_TARGET_ENV=""
-        default IDF_TARGET_ENV
+        default "$IDF_TARGET"
+
+    config IDF_TARGET_ESP32
+        bool
+        default "y" if IDF_TARGET="esp32"
+
+    config IDF_TARGET_ESP32S2
+        bool
+        default "y" if IDF_TARGET="esp32s2"
+        select FREERTOS_UNICORE
 
     config IDF_FIRMWARE_CHIP_ID
         hex
-        default 0x0000 if IDF_TARGET="esp32"
+        default 0x0000 if IDF_TARGET_ESP32
+        default 0x0002 if IDF_TARGET_ESP32S2
         default 0xFFFF
 
     menu "SDK tool configuration"
         config SDK_TOOLPREFIX
             string "Compiler toolchain path/prefix"
-            default "xtensa-esp32-elf-"
+            default "xtensa-esp32-elf-" if IDF_TARGET_ESP32
+            default "xtensa-esp32s2-elf-" if IDF_TARGET_ESP32S2
             help
                 The prefix/path that is used to call the toolchain. The default setting assumes
                 a crosstool-ng gcc setup that is in your PATH.
@@ -65,32 +67,139 @@ mainmenu "Espressif IoT Development Framework Configuration"
 
                 (Note: this option is used with the legacy GNU Make build system only.)
 
+        config SDK_TOOLCHAIN_SUPPORTS_TIME_WIDE_64_BITS
+            bool "Toolchain supports time_t wide 64-bits"
+            default n
+            help
+                Enable this option in case you have a custom toolchain which supports time_t wide 64-bits.
+                This option checks time_t is 64-bits and disables ROM time functions
+                to use the time functions from the toolchain instead.
+                This option allows resolving the Y2K38 problem.
+                See "Setup Linux Toolchain from Scratch" to build
+                a custom toolchain which supports 64-bits time_t.
+
+                Note: ESP-IDF does not currently come with any pre-compiled toolchain
+                that supports 64-bit wide time_t.
+                This will change in a future major release,
+                but currently 64-bit time_t requires a custom built toolchain.
+
     endmenu  # SDK tool configuration
 
-    source "$COMPONENT_KCONFIGS_PROJBUILD"
+    menu "Build type"
+
+        choice APP_BUILD_TYPE
+            prompt "Application build type"
+            default APP_BUILD_TYPE_APP_2NDBOOT
+            help
+                Select the way the application is built.
+
+                By default, the application is built as a binary file in a format compatible with
+                the ESP32 bootloader. In addition to this application, 2nd stage bootloader is
+                also built. Application and bootloader binaries can be written into flash and
+                loaded/executed from there.
+
+                Another option, useful for only very small and limited applications, is to only link
+                the .elf file of the application, such that it can be loaded directly into RAM over
+                JTAG. Note that since IRAM and DRAM sizes are very limited, it is not possible to
+                build any complex application this way. However for kinds of testing and debugging,
+                this option may provide faster iterations, since the application does not need to be
+                written into flash.
+                Note that at the moment, ESP-IDF does not contain all the startup code required to
+                initialize the CPUs and ROM memory (data/bss). Therefore it is necessary to execute
+                a bit of ROM code prior to executing the application. A gdbinit file may look as follows:
+
+                    # Connect to a running instance of OpenOCD
+                    target remote :3333
+                    # Reset and halt the target
+                    mon reset halt
+                    # Run to a specific point in ROM code,
+                    #  where most of initialization is complete.
+                    thb *0x40007d54
+                    c
+                    # Load the application into RAM
+                    load
+                    # Run till app_main
+                    tb app_main
+                    c
+
+                Execute this gdbinit file as follows:
+
+                    xtensa-esp32-elf-gdb build/app-name.elf -x gdbinit
+
+                Recommended sdkconfig.defaults for building loadable ELF files is as follows.
+                CONFIG_APP_BUILD_TYPE_ELF_RAM is required, other options help reduce application
+                memory footprint.
+
+                    CONFIG_APP_BUILD_TYPE_ELF_RAM=y
+                    CONFIG_VFS_SUPPORT_TERMIOS=
+                    CONFIG_NEWLIB_NANO_FORMAT=y
+                    CONFIG_ESP_SYSTEM_PANIC_PRINT_HALT=y
+                    CONFIG_ESP_DEBUG_STUBS_ENABLE=
+                    CONFIG_ESP_ERR_TO_NAME_LOOKUP=
+
+
+            config APP_BUILD_TYPE_APP_2NDBOOT
+                bool
+                prompt "Default (binary application + 2nd stage bootloader)"
+                select APP_BUILD_GENERATE_BINARIES
+                select APP_BUILD_BOOTLOADER
+                select APP_BUILD_USE_FLASH_SECTIONS
+
+            config APP_BUILD_TYPE_ELF_RAM
+                bool
+                prompt "ELF file, loadable into RAM (EXPERIMENTAL))"
+        endchoice # APP_BUILD_TYPE
+
+        # Hidden options, set according to the choice above
+        config APP_BUILD_GENERATE_BINARIES
+            bool # Whether to generate .bin files or not
+
+        config APP_BUILD_BOOTLOADER
+            bool # Whether to build the bootloader
+
+        config APP_BUILD_USE_FLASH_SECTIONS
+            bool # Whether to place code/data into memory-mapped flash sections
+
+    endmenu # Build type
+
+    source "$COMPONENT_KCONFIGS_PROJBUILD_SOURCE_FILE"
 
     menu "Compiler options"
 
         choice COMPILER_OPTIMIZATION
             prompt "Optimization Level"
-            default COMPILER_OPTIMIZATION_LEVEL_DEBUG
+            default COMPILER_OPTIMIZATION_DEFAULT
             help
-                This option sets compiler optimization level (gcc -O argument).
+                This option sets compiler optimization level (gcc -O argument) for the app.
 
-                - for "Release" setting, -Os flag is added to CFLAGS.
-                - for "Debug" setting, -Og flag is added to CFLAGS.
+                - The "Default" setting will add the -0g flag to CFLAGS.
+                - The "Size" setting will add the -0s flag to CFLAGS.
+                - The "Performance" setting will add the -O2 flag to CFLAGS.
+                - The "None" setting will add the -O0 flag to CFLAGS.
 
-                "Release" with -Os produces smaller & faster compiled code but it
-                may be harder to correlated code addresses to source files when debugging.
+                The "Size" setting cause the compiled code to be smaller and faster, but
+                may lead to difficulties of correlating code addresses to source file
+                lines when debugging.
 
-                To add custom optimization settings, set CFLAGS and/or CPPFLAGS
-                in project makefile, before including $(IDF_PATH)/make/project.mk. Note that
-                custom optimization levels may be unsupported.
+                The "Performance" setting causes the compiled code to be larger and faster,
+                but will be easier to correlated code addresses to source file lines.
 
-            config COMPILER_OPTIMIZATION_LEVEL_DEBUG
+                "None" with -O0 produces compiled code without optimization.
+
+                Note that custom optimization levels may be unsupported.
+
+                Compiler optimization for the IDF bootloader is set separately,
+                see the BOOTLOADER_COMPILER_OPTIMIZATION setting.
+
+            config COMPILER_OPTIMIZATION_DEFAULT
                 bool "Debug (-Og)"
-            config COMPILER_OPTIMIZATION_LEVEL_RELEASE
-                bool "Release (-Os)"
+            config COMPILER_OPTIMIZATION_SIZE
+                bool "Optimize for size (-Os)"
+            config COMPILER_OPTIMIZATION_PERF
+                bool "Optimize for performance (-O2)"
+            config COMPILER_OPTIMIZATION_NONE
+                bool "Debug without optimization (-O0)"
+
         endchoice
 
         choice COMPILER_OPTIMIZATION_ASSERTION_LEVEL
@@ -149,9 +258,8 @@ mainmenu "Espressif IoT Development Framework Configuration"
                 memory for thrown exceptions when there is not enough memory on the heap.
 
         config COMPILER_CXX_RTTI
-            # Invisible option, until the toolchain with RTTI support is released.
-            # Use prompt "Enable C++ run-time type info (RTTI)" when updating.
-            bool
+            bool "Enable C++ run-time type info (RTTI)"
+            default n
             help
                 Enabling this option compiles all C++ files with RTTI support enabled.
                 This increases binary size (typically by tens of kB) but allows using
@@ -223,12 +331,12 @@ mainmenu "Espressif IoT Development Framework Configuration"
     endmenu # Compiler Options
 
     menu "Component config"
-        source "$COMPONENT_KCONFIGS"
+        source "$COMPONENT_KCONFIGS_SOURCE_FILE"
     endmenu
 
     menu "Compatibility options"
         config LEGACY_INCLUDE_COMMON_HEADERS
-            bool "Include headers accross components as before IDF v4.0"
+            bool "Include headers across components as before IDF v4.0"
             default n
             help
                 Soc, esp32, and driver components, the most common

README.md

@@ -1,15 +1,16 @@
 # Espressif IoT Development Framework
 
-ESP-IDF is the official development framework for the [ESP32](https://espressif.com/en/products/hardware/esp32/overview) chip provided for Windows, Linux and macOS.
+* [中文版](./README_CN.md)
+
+ESP-IDF is the development framework for Espressif SoCs (released after 2016<sup>[1](#fn1)</sup>) provided for Windows, Linux and macOS.
 
 # Developing With ESP-IDF
 
 ## Setting Up ESP-IDF
 
-See setup guides for detailed instructions to set up the ESP-IDF:
+See https://idf.espressif.com/ for links to detailed instructions on how to set up the ESP-IDF depending on chip you use.
 
-* [Getting Started Guide for the stable ESP-IDF version](https://docs.espressif.com/projects/esp-idf/en/stable/get-started/)
-* [Getting Started Guide for the latest (master branch) ESP-IDF version](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/)
+**Note:** Each SoC series and each ESP-IDF release has its own documentation. Please see Section [Versions](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/versions.html) on how to find documentation and how to checkout specific release of ESP-IDF.
 
 ### Non-GitHub forks
 
@@ -36,12 +37,13 @@ See the Getting Started guide links above for a detailed setup guide. This is a
 (See the Getting Started guide listed above for a full list of required steps with more details.)
 
 * Install host build dependencies mentioned in the Getting Started guide.
-* Run the install script to set up the build environment. The options include `install.bat` for Windows, and `install.sh` for Unix shells.
+* Run the install script to set up the build environment. The options include `install.bat` or `install.ps1` for Windows, and `install.sh` or `install.fish` for Unix shells.
 * Run the export script on Windows (`export.bat`) or source it on Unix (`source export.sh`) in every shell environment before using ESP-IDF.
 
 ## Configuring the Project
 
-`idf.py menuconfig` opens a text-based configuration menu where you can configure the project.
+* `idf.py set-target <chip_name>` sets the target of the project to `<chip_name>`. Run `idf.py set-target` without any arguments to see a list of supported targets.
+* `idf.py menuconfig` opens a text-based configuration menu where you can configure the project.
 
 ## Compiling the Project
 
@@ -63,7 +65,7 @@ You don't need to run `idf.py build` before running `idf.py flash`, `idf.py flas
 
 ## Viewing Serial Output
 
-The `idf.py monitor` target uses the [idf_monitor tool](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html) to display serial output from the ESP32. idf_monitor also has a range of features to decode crash output and interact with the device. [Check the documentation page for details](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html).
+The `idf.py monitor` target uses the [idf_monitor tool](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html) to display serial output from Espressif SoCs. idf_monitor also has a range of features to decode crash output and interact with the device. [Check the documentation page for details](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html).
 
 Exit the monitor by typing Ctrl-].
 
@@ -99,3 +101,6 @@ This can be combined with other targets, ie `idf.py -p PORT erase_flash flash` w
 * If you're interested in contributing to ESP-IDF, please check the [Contributions Guide](https://docs.espressif.com/projects/esp-idf/en/latest/contribute/index.html).
 
 
+________
+
+<a name="fn1">1</a>: ESP8266 and ESP8285 are not supported in ESP-IDF. See [RTOS SDK](https://github.com/espressif/ESP8266_RTOS_SDK) instead.

README_CN.md

@@ -0,0 +1,106 @@
+# Espressif 物联网开发框架
+
+* [English Version](./README.md)
+
+ESP-IDF 是由乐鑫官方针对乐鑫各系列芯片产品（发布于 2016 年后<sup>[1](#fn1)</sup>）推出的开发框架，支持 Windows、Linux 和 macOS 操作系统。
+
+# 使用 ESP-IDF 进行开发
+
+## 搭建 ESP-IDF 开发环境
+
+关于不同芯片如何搭建 ESP-IDF 的开发环境，请参考 https://idf.espressif.com/。
+
+**注意：** 不同系列芯片和不同 ESP-IDF 版本都有其对应的文档。请参阅[版本](https://docs.espressif.com/projects/esp-idf/zh_CN/latest/esp32/versions.html)部分，获得关于如何查找文档以及如何检出 ESP-IDF 的特定发行版的详细信息。
+
+### 非 GitHub 分叉的 ESP-IDF 项目
+
+ESP-IDF 中的子模块采用相对路径（[详见 .gitmodules 文件](.gitmodules)），所以它们会指向 GitHub。
+如果 ESP-IDF 被分叉到的仓库不在 GitHub 上，那么你需要在克隆结束后运行该脚本 [tools/set-submodules-to-github.sh](tools/set-submodules-to-github.sh)。
+
+这个脚本会为所有的子模块设置绝对路径，接着可以通过 `git submodule update --init --recursive` 完成子模块的更新。
+如果 ESP-IDF 是从 GitHub 上克隆得到，则不需要此步骤。
+
+## 寻找项目
+
+除了入门指南中提到的 [esp-idf 模板项目](https://github.com/espressif/esp-idf-template)，ESP-IDF 的 [examples](examples) 目录下还带有很多其它示例项目。
+
+一旦找到了需要的项目，便可以进入该目录，执行配置和构建操作。
+
+如果要基于示例工程开始你自己的项目，请将示例工程复制到 ESP-IDF 目录之外。
+
+# 快速参考
+
+详细的使用方法请参考上面入门指南的链接，这里仅仅列举一些 ESP-IDF 项目开发中常用的命令：
+
+## 设置构建环境
+
+请参考入门指南中列出的详细步骤。
+
+* 在主机中安装入门指南中提到的构建所依赖的工具。
+* 运行安装脚本来设置构建环境。可为 Windows shell 选择 `install.bat` 或 `install.ps1`，为 Unix shell 选择 `install.sh` 和 `install.fish`。
+* 在使用 ESP-IDF 之前，需要在 shell 中运行导出脚本。Windows 下可运行 `export.bat`，Unix 下可运行 `source export.sh`。
+  
+## 配置项目
+
+* `idf.py set-target <chip_name>` 可将项目的目标芯片设置为 `<chip_name>`。运行 `idf.py set-target`，不用带任何参数，可查看所有支持的目标芯片列表。
+* `idf.py menuconfig` 可打开一个基于文本的配置菜单，可以用来对项目进行配置。
+
+## 编译项目
+
+`idf.py build`
+
+编译应用程序，引导程序，并根据配置生成分区表。
+
+## 烧写项目
+
+当构建结束，终端会打印出一条命令行，告知如何使用 esptool.py 工具烧写项目到芯片中。但你也可以运行下面这条命令来自动烧写：
+
+`idf.py -p PORT flash`
+
+将其中的 PORT 替换为系统中实际串口的名字（比如 Windows 下的 `COM3`，Linux 下的 `/dev/ttyUSB0`，或者 macOS 下的 `/dev/cu.usbserial-X`。如果省略 `-p` 选项，`idf.py flash` 会尝试使用第一个可用的串口进行烧写。
+
+这会烧写整个项目（包括应用程序，引导程序和分区表）到芯片中，此外还可以使用 `idf.py menuconfig` 来调整串口烧写相关的配置。
+
+不必先运行 `idf.py build` 再运行 `idf.py flash`，`idf.py flash` 会根据需要自动重新构建项目。
+
+## 观察串口输入
+
+`idf.py monitor` 会调用 [idf_monitor 工具](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html)来显示乐鑫芯片的串口输出。`idf_monitor` 还包含一系列的功能来解析程序崩溃后的输出结果并与设备进行交互。更多详细内容，请参阅[文档](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/idf-monitor.html).
+
+输入 `Ctrl-]` 可退出监视器。
+
+想要一次性执行构建、烧写和监视，可以运行如下命令：
+
+`idf.py flash monitor`
+
+## 仅编译并烧写应用程序
+
+在第一次烧写过后，你可能只想构建并烧写你的应用程序，不包括引导程序和分区表：
+
+* `idf.py app` - 仅构建应用程序。
+* `idf.py app-flash` - 仅烧写应用程序。
+
+`idf.py app-flash` 会自动判断是否有源文件发生了改变然后重新构建应用程序。
+
+（在正常的开发中，即使引导程序和分区表没有发生变化，每次都重新烧写它们并不会带来什么危害。）
+
+## 擦除 Flash
+
+`idf.py flash` 并不会擦除 flash 上所有的内容，但是有时候我们需要设备恢复到完全擦除的状态，尤其是分区表发生了变化或者 OTA 应用升级时。要擦除整块 flash 请运行 `idf.py erase_flash`。
+
+这条命令还可以和其余命令整合在一起，`idf.py -p PORT erase_flash flash` 会擦除一切然后重新烧写新的应用程序、引导程序和分区表。
+
+# 其它参考资源
+
+* 最新版的文档：https://docs.espressif.com/projects/esp-idf/，该文档是由本仓库 [docs 目录](docs) 构建得到。
+
+* 可以前往 [esp32.com 论坛](https://esp32.com/) 提问，挖掘社区资源。
+
+* 如果你在使用中发现了错误或者需要新的功能，请先[查看 GitHub Issues](https://github.com/espressif/esp-idf/issues)，确保该问题没有重复提交。
+
+* 如果你有兴趣为 ESP-IDF 作贡献，请先阅读[贡献指南](https://docs.espressif.com/projects/esp-idf/en/latest/contribute/index.html)。
+
+
+__________
+
+<a name="fn1">1</a>: ESP-IDF 不支持 ESP8266 和 ESP8285。如有需要，请参考 [RTOS SDK](https://github.com/espressif/ESP8266_RTOS_SDK)。

SUPPORT_POLICY.md

@@ -3,6 +3,8 @@ The latest support policy for ESP-IDF can be found at [https://github.com/espres
 Support Period Policy
 =====================
 
+* [中文版](./SUPPORT_POLICY_CN.md)
+
 Each ESP-IDF major and minor release (V4.0, V4.1, etc) is supported for
 18 months after the initial stable release date.
 

SUPPORT_POLICY_CN.md

@@ -0,0 +1,43 @@
+有关 ESP-IDF 的最新支持政策，详见 [支持期限政策](./SUPPORT_POLICY_CN.md)。
+支持期限政策
+=================
+
+* [English Version](./SUPPORT_POLICY.md)
+
+ESP-IDF 的每个主要版本和次要版本（如 V4.0、V4.1 等）自其首次稳定版本发布之日起将维护 18 个月。
+
+维护意味着 ESP-IDF 团队将会对 GitHub 上的发布分支继续进行 bug 修复、安全修补等，并根据需求定期发布新的 bugfix 版本。
+
+在某一版本支持期限结束，停止更新维护 (EOL) 前，建议用户升级到较新的 ESP-IDF 版本。根据《支持期限政策》，我们将停止对 EOL 版本进行 bug 修复。
+
+《支持期限政策》不适用于预发布版本（包括 beta、preview、`-rc` 和 `-dev` 版本等）。有时，在发布的版本中存在被标记为 "Preview" 的特定功能，则该功能也不在支持期限内。
+
+有关 [ ESP-IDF 不同版本](https://docs.espressif.com/projects/esp-idf/zh_CN/latest/versions.html)（主要版本、次要版本、bugfix 版本等）信息，可参阅《ESP-IDF 编程指南》。
+
+长期支持版本
+------------
+
+有些发布版本（从 ESP-IDF V3.3 开始）属于长期支持 (LTS) 版本。LTS 版本将自其首次稳定版本发布之日起维护 30 个月（2.5 年）。
+
+我们将至少每 18 个月发布一个新的 LTS 版本。这意味着将至少有 12 个月的期限可更新至下一个 LTS 版本。
+
+示例
+-----
+
+ESP-IDF V3.3 于 2019 年 9 月发布，属于 LTS 版本，将维护 30 个月至 2022 年 2 月停止。
+
+- V3.3 的首个发布版本为 2019 年 9 月发布的 `v3.3`。
+- ESP-IDF 团队将持续进行 bug 修复、安全修补等更新，并 backport 至分支 `release/v3.3`。
+- 定期从 release 分支创建稳定的 bugfix 版本，比如，`v3.3.1`、`v3.3.2` 等，并建议用户保持使用最新的 bugfix 版本。
+- V3.3 的 bugfix 版本发布将持续至 2022 年 2 月，届时所有 V3.3.x 将停止更新维护。
+
+现有版本
+--------
+
+ESP-IDF V3.3 及所有后续更新版本都将遵守该《支持期限政策》。每一版本发布时将同时公布其支持期限。
+
+对于该政策公布之日前发布的版本，应适用下述支持期限：
+
+- ESP-IDF V3.1.x 和 V3.2.x 将维护至 2020 年 10 月。
+- ESP-IDF V3.0.9（计划 2019 年 10 月发布）将是 V3.0 的最后一个 bugfix 版本。ESP-IDF V3.0.x 自 2019 年 10 月起停止更新维护 (EOL)。
+- ESP-IDF 中 V3.0 之前的版本均已停止更新维护 (EOL)。

components/app_trace/CMakeLists.txt

@@ -1,4 +1,4 @@
-set(srcs
+set(srcs 
     "app_trace.c"
     "app_trace_util.c"
     "host_file_io.c"
@@ -12,7 +12,7 @@ if(CONFIG_SYSVIEW_ENABLE)
         sys_view/SEGGER
         sys_view/Sample/OS)
 
-    list(APPEND srcs
+    list(APPEND srcs 
         "sys_view/SEGGER/SEGGER_SYSVIEW.c"
         "sys_view/Sample/Config/SEGGER_SYSVIEW_Config_FreeRTOS.c"
         "sys_view/Sample/OS/SEGGER_SYSVIEW_FreeRTOS.c"
@@ -23,15 +23,18 @@ endif()
 
 if(CONFIG_HEAP_TRACING_TOHOST)
     list(APPEND srcs "heap_trace_tohost.c")
+    set_source_files_properties(heap_trace_tohost.c
+        PROPERTIES COMPILE_FLAGS
+        -Wno-frame-address)
 endif()
 
 idf_component_register(SRCS "${srcs}"
                        INCLUDE_DIRS "${include_dirs}"
-                       PRIV_REQUIRES soc
+                       PRIV_REQUIRES soc esp_ipc
                        LDFRAGMENTS linker.lf)
 
 
-if(CONFIG_ESP32_GCOV_ENABLE)
+if(CONFIG_APPTRACE_GCOV_ENABLE)
     # disable --coverage for this component, as it is used as transport
     # for gcov
     target_compile_options(${COMPONENT_LIB} PRIVATE "-fno-profile-arcs" "-fno-test-coverage")

components/app_trace/Kconfig

@@ -1,54 +1,56 @@
 menu "Application Level Tracing"
 
-    choice ESP32_APPTRACE_DESTINATION
+    choice APPTRACE_DESTINATION
         prompt "Data Destination"
-        default ESP32_APPTRACE_DEST_NONE
+        default APPTRACE_DEST_NONE
         help
             Select destination for application trace: trace memory or none (to disable).
 
-        config ESP32_APPTRACE_DEST_TRAX
+        config APPTRACE_DEST_TRAX
             bool "Trace memory"
-            select ESP32_APPTRACE_ENABLE
-        config ESP32_APPTRACE_DEST_NONE
+            select APPTRACE_ENABLE
+        config APPTRACE_DEST_NONE
             bool "None"
     endchoice
 
-    config ESP32_APPTRACE_ENABLE
+    config APPTRACE_ENABLE
         bool
-        depends on !ESP32_TRAX
+        depends on !ESP32_TRAX && !ESP32S2_TRAX
         select ESP32_MEMMAP_TRACEMEM
+        select ESP32S2_MEMMAP_TRACEMEM
         select ESP32_MEMMAP_TRACEMEM_TWOBANKS
+        select ESP32S2_MEMMAP_TRACEMEM_TWOBANKS
         default n
         help
             Enables/disable application tracing module.
 
-    config ESP32_APPTRACE_LOCK_ENABLE
+    config APPTRACE_LOCK_ENABLE
         bool
         default !SYSVIEW_ENABLE
         help
             Enables/disable application tracing module internal sync lock.
 
-    config ESP32_APPTRACE_ONPANIC_HOST_FLUSH_TMO
+    config APPTRACE_ONPANIC_HOST_FLUSH_TMO
         int "Timeout for flushing last trace data to host on panic"
-        depends on ESP32_APPTRACE_ENABLE
+        depends on APPTRACE_ENABLE
         range -1 5000
         default -1
         help
             Timeout for flushing last trace data to host in case of panic. In ms.
             Use -1 to disable timeout and wait forever.
 
-    config ESP32_APPTRACE_POSTMORTEM_FLUSH_THRESH
+    config APPTRACE_POSTMORTEM_FLUSH_THRESH
         int "Threshold for flushing last trace data to host on panic"
-        depends on ESP32_APPTRACE_DEST_TRAX
+        depends on APPTRACE_DEST_TRAX
         range 0 16384
         default 0
         help
             Threshold for flushing last trace data to host on panic in post-mortem mode.
             This is minimal amount of data needed to perform flush. In bytes.
 
-    config ESP32_APPTRACE_PENDING_DATA_SIZE_MAX
+    config APPTRACE_PENDING_DATA_SIZE_MAX
         int "Size of the pending data buffer"
-        depends on ESP32_APPTRACE_DEST_TRAX
+        depends on APPTRACE_DEST_TRAX
         default 0
         help
             Size of the buffer for events in bytes. It is useful for buffering events from
@@ -56,10 +58,10 @@ menu "Application Level Tracing"
             events will be discarded when main HW buffer is full.
 
     menu "FreeRTOS SystemView Tracing"
-        depends on ESP32_APPTRACE_ENABLE
+        depends on APPTRACE_ENABLE
         config SYSVIEW_ENABLE
             bool "SystemView Tracing Enable"
-            depends on ESP32_APPTRACE_ENABLE
+            depends on APPTRACE_ENABLE
             default n
             help
                 Enables supporrt for SEGGER SystemView tracing functionality.
@@ -208,10 +210,11 @@ menu "Application Level Tracing"
 
     endmenu
 
-    config ESP32_GCOV_ENABLE
+    config APPTRACE_GCOV_ENABLE
         bool "GCOV to Host Enable"
-        depends on ESP32_DEBUG_STUBS_ENABLE && ESP32_APPTRACE_ENABLE && !SYSVIEW_ENABLE
-        default y
+        depends on APPTRACE_ENABLE && !SYSVIEW_ENABLE
+        select ESP_DEBUG_STUBS_ENABLE
+        default n
         help
             Enables support for GCOV data transfer to host.
 

components/app_trace/app_trace.c

@@ -76,11 +76,11 @@
 //    It can happen that system panic occurs when there are very small amount of data which are not exposed to host yet (e.g. crash just after the
 //    TRAX block switch). In this case the previous 16KB of collected data will be dropped and host will see the latest, but very small piece of trace.
 //    It can be insufficient to diagnose the problem. To avoid such situations there is menuconfig option
-//    CONFIG_ESP32_APPTRACE_POSTMORTEM_FLUSH_THRESH
+//    CONFIG_APPTRACE_POSTMORTEM_FLUSH_THRESH
 //    which controls the threshold for flushing data in case of panic.
 //  - Streaming mode. Tracing module enters this mode when host connects to target and sets respective bits in control registers (per core).
 //    In this mode before switching the block tracing module waits for the host to read all the data from the previously exposed block.
-//    On panic tracing module also waits (timeout is configured via menuconfig via CONFIG_ESP32_APPTRACE_ONPANIC_HOST_FLUSH_TMO) for the host to read all data.
+//    On panic tracing module also waits (timeout is configured via menuconfig via CONFIG_APPTRACE_ONPANIC_HOST_FLUSH_TMO) for the host to read all data.
 
 // 4. Communication Protocol
 // =========================
@@ -114,7 +114,7 @@
 // has not completed reading of the previous one yet. So in this case time critical tracing calls (which can not be delayed for too long time due to
 // the lack of free memory in TRAX block) can be dropped. To avoid such scenarios tracing module implements data buffering. Buffered data will be sent
 // to the host later when TRAX block switch occurs. The maximum size of the buffered data is controlled by menuconfig option
-// CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX.
+// CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX.
 
 // 4.4 Target Connection/Disconnection
 // -----------------------------------
@@ -158,13 +158,16 @@
 #include <sys/param.h>
 #include "soc/soc.h"
 #include "soc/dport_reg.h"
+#if CONFIG_IDF_TARGET_ESP32S2
+#include "soc/sensitive_reg.h"
+#endif
 #include "eri.h"
 #include "trax.h"
 #include "soc/timer_periph.h"
 #include "freertos/FreeRTOS.h"
 #include "esp_app_trace.h"
 
-#if CONFIG_ESP32_APPTRACE_ENABLE
+#if CONFIG_APPTRACE_ENABLE
 #define ESP_APPTRACE_MAX_VPRINTF_ARGS           256
 #define ESP_APPTRACE_HOST_BUF_SIZE              256
 
@@ -202,10 +205,16 @@ const static char *TAG = "esp_apptrace";
 #define ESP_APPTRACE_LOGO( format, ... )  ESP_APPTRACE_LOG_LEV(E, ESP_LOG_NONE, format, ##__VA_ARGS__)
 
 // TODO: move these (and same definitions in trax.c to dport_reg.h)
+#if CONFIG_IDF_TARGET_ESP32
 #define TRACEMEM_MUX_PROBLK0_APPBLK1            0
 #define TRACEMEM_MUX_BLK0_ONLY                  1
 #define TRACEMEM_MUX_BLK1_ONLY                  2
 #define TRACEMEM_MUX_PROBLK1_APPBLK0            3
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define TRACEMEM_MUX_BLK0_NUM                   19
+#define TRACEMEM_MUX_BLK1_NUM                   20
+#define TRACEMEM_BLK_NUM2ADDR(_n_)              (0x3FFB8000UL + 0x4000UL*((_n_)-4))
+#endif
 
 // TRAX is disabled, so we use its registers for our own purposes
 // | 31..XXXXXX..24 | 23 .(host_connect). 23 | 22 .(host_data). 22| 21..(block_id)..15 | 14..(block_len)..0 |
@@ -230,10 +239,17 @@ const static char *TAG = "esp_apptrace";
 #endif
 #define ESP_APPTRACE_USR_BLOCK_RAW_SZ(_s_)     ((_s_) + sizeof(esp_tracedata_hdr_t))
 
+#if CONFIG_IDF_TARGET_ESP32
 static volatile uint8_t *s_trax_blocks[] = {
     (volatile uint8_t *) 0x3FFFC000,
     (volatile uint8_t *) 0x3FFF8000
 };
+#elif CONFIG_IDF_TARGET_ESP32S2
+static volatile uint8_t *s_trax_blocks[] = {
+    (volatile uint8_t *)TRACEMEM_BLK_NUM2ADDR(TRACEMEM_MUX_BLK0_NUM),
+    (volatile uint8_t *)TRACEMEM_BLK_NUM2ADDR(TRACEMEM_MUX_BLK1_NUM)
+};
+#endif
 
 #define ESP_APPTRACE_TRAX_BLOCKS_NUM            (sizeof(s_trax_blocks)/sizeof(s_trax_blocks[0]))
 
@@ -293,17 +309,17 @@ typedef struct {
 typedef struct {
     volatile esp_apptrace_trax_state_t  state;                                  // state
     esp_apptrace_mem_block_t            blocks[ESP_APPTRACE_TRAX_BLOCKS_NUM];   // memory blocks
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
     // ring buffer control struct for pending user blocks
     esp_apptrace_rb_t                   rb_pend;
     // storage for pending user blocks
-    uint8_t                             pending_data[CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX + 1];
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+    uint8_t                             pending_data[CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX + 1];
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
     // ring buffer control struct for pending user data chunks sizes,
     // every chunk contains whole number of user blocks and fit into TRAX memory block
     esp_apptrace_rb_t                   rb_pend_chunk_sz;
     // storage for above ring buffer data
-    uint16_t                            pending_chunk_sz[CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX/ESP_APPTRACE_TRAX_BLOCK_SIZE + 2];
+    uint16_t                            pending_chunk_sz[CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX/ESP_APPTRACE_TRAX_BLOCK_SIZE + 2];
     // current (accumulated) pending user data chunk size
     uint16_t                            cur_pending_chunk_sz;
 #endif
@@ -360,7 +376,7 @@ static esp_apptrace_hw_t s_trace_hw[ESP_APPTRACE_HW_MAX] = {
     }
 };
 
-static inline int esp_apptrace_log_lock()
+static inline int esp_apptrace_log_lock(void)
 {
 #if ESP_APPTRACE_PRINT_LOCK
     esp_apptrace_tmo_t tmo;
@@ -372,29 +388,29 @@ static inline int esp_apptrace_log_lock()
 #endif
 }
 
-static inline void esp_apptrace_log_unlock()
+static inline void esp_apptrace_log_unlock(void)
 {
  #if ESP_APPTRACE_PRINT_LOCK
     esp_apptrace_lock_give(&s_log_lock);
 #endif
 }
 
-static inline esp_err_t esp_apptrace_lock_initialize()
+static inline esp_err_t esp_apptrace_lock_initialize(esp_apptrace_lock_t *lock)
 {
-#if CONFIG_ESP32_APPTRACE_LOCK_ENABLE
-    esp_apptrace_lock_init(&s_trace_buf.lock);
+#if CONFIG_APPTRACE_LOCK_ENABLE
+    esp_apptrace_lock_init(lock);
 #endif
     return ESP_OK;
 }
 
-static inline esp_err_t esp_apptrace_lock_cleanup()
+static inline esp_err_t esp_apptrace_lock_cleanup(void)
 {
     return ESP_OK;
 }
 
 esp_err_t esp_apptrace_lock(esp_apptrace_tmo_t *tmo)
 {
-#if CONFIG_ESP32_APPTRACE_LOCK_ENABLE
+#if CONFIG_APPTRACE_LOCK_ENABLE
     esp_err_t ret = esp_apptrace_lock_take(&s_trace_buf.lock, tmo);
     if (ret != ESP_OK) {
         return ESP_FAIL;
@@ -403,17 +419,28 @@ esp_err_t esp_apptrace_lock(esp_apptrace_tmo_t *tmo)
     return ESP_OK;
 }
 
-esp_err_t esp_apptrace_unlock()
+esp_err_t esp_apptrace_unlock(void)
 {
     esp_err_t ret = ESP_OK;
-#if CONFIG_ESP32_APPTRACE_LOCK_ENABLE
+#if CONFIG_APPTRACE_LOCK_ENABLE
     ret = esp_apptrace_lock_give(&s_trace_buf.lock);
 #endif
     return ret;
 }
 
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
-static void esp_apptrace_trax_init()
+#if CONFIG_APPTRACE_DEST_TRAX
+
+static inline void esp_apptrace_trax_select_memory_block(int block_num)
+{
+    // select memory block to be exposed to the TRAX module (accessed by host)
+#if CONFIG_IDF_TARGET_ESP32
+    DPORT_WRITE_PERI_REG(DPORT_TRACEMEM_MUX_MODE_REG, block_num ? TRACEMEM_MUX_BLK0_ONLY : TRACEMEM_MUX_BLK1_ONLY);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    DPORT_WRITE_PERI_REG(DPORT_PMS_OCCUPY_3_REG, block_num ? BIT(TRACEMEM_MUX_BLK0_NUM-4) : BIT(TRACEMEM_MUX_BLK1_NUM-4));
+#endif
+}
+
+static void esp_apptrace_trax_init(void)
 {
     // Stop trace, if any (on the current CPU)
     eri_write(ERI_TRAX_TRAXCTRL, TRAXCTRL_TRSTP);
@@ -426,7 +453,7 @@ static void esp_apptrace_trax_init()
     ESP_APPTRACE_LOGI("Initialized TRAX on CPU%d", xPortGetCoreID());
 }
 
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
 // keep the size of buffered data for copying to TRAX mem block.
 // Only whole user blocks should be copied from buffer to TRAX block upon the switch
 static void esp_apptrace_trax_pend_chunk_sz_update(uint16_t size)
@@ -449,7 +476,7 @@ static void esp_apptrace_trax_pend_chunk_sz_update(uint16_t size)
     }
 }
 
-static uint16_t esp_apptrace_trax_pend_chunk_sz_get()
+static uint16_t esp_apptrace_trax_pend_chunk_sz_get(void)
 {
     uint16_t ch_sz;
     ESP_APPTRACE_LOGD("Get chunk enter %d w-r-s %d-%d-%d", s_trace_buf.trax.cur_pending_chunk_sz,
@@ -467,7 +494,7 @@ static uint16_t esp_apptrace_trax_pend_chunk_sz_get()
 #endif
 
 // assumed to be protected by caller from multi-core/thread access
-static esp_err_t esp_apptrace_trax_block_switch()
+static esp_err_t esp_apptrace_trax_block_switch(void)
 {
     int prev_block_num = s_trace_buf.trax.state.in_block % 2;
     int new_block_num = prev_block_num ? (0) : (1);
@@ -499,7 +526,7 @@ static esp_err_t esp_apptrace_trax_block_switch()
     // switch to new block
     s_trace_buf.trax.state.in_block++;
 
-    DPORT_WRITE_PERI_REG(DPORT_TRACEMEM_MUX_MODE_REG, new_block_num ? TRACEMEM_MUX_BLK0_ONLY : TRACEMEM_MUX_BLK1_ONLY);
+    esp_apptrace_trax_select_memory_block(new_block_num);
     // handle data from host
     esp_hostdata_hdr_t *hdr = (esp_hostdata_hdr_t *)s_trace_buf.trax.blocks[new_block_num].start;
     if (ctrl_reg & ESP_APPTRACE_TRAX_HOST_DATA && hdr->block_sz > 0) {
@@ -517,9 +544,9 @@ static esp_err_t esp_apptrace_trax_block_switch()
         }
         hdr->block_sz = 0;
     }
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
     // copy pending data to TRAX block if any
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
     uint16_t max_chunk_sz = esp_apptrace_trax_pend_chunk_sz_get();
 #else
     uint16_t max_chunk_sz = s_trace_buf.trax.blocks[new_block_num].sz;
@@ -527,7 +554,7 @@ static esp_err_t esp_apptrace_trax_block_switch()
     while (s_trace_buf.trax.state.markers[new_block_num] < max_chunk_sz) {
         uint32_t read_sz = esp_apptrace_rb_read_size_get(&s_trace_buf.trax.rb_pend);
         if (read_sz == 0) {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
             /* theres is a bug: esp_apptrace_trax_pend_chunk_sz_get returned wrong value,
                it must be greater or equal to one returned by esp_apptrace_rb_read_size_get */
             ESP_APPTRACE_LOGE("No pended bytes, must be > 0 and <= %d!", max_chunk_sz);
@@ -670,7 +697,7 @@ static inline uint8_t *esp_apptrace_trax_wait4buf(uint16_t size, esp_apptrace_tm
         return NULL;
     }
     // check if we still have pending data
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
     if (esp_apptrace_rb_read_size_get(&s_trace_buf.trax.rb_pend) > 0) {
         // if after TRAX block switch still have pending data (not all pending data have been pumped to TRAX block)
         // alloc new pending buffer
@@ -684,7 +711,7 @@ static inline uint8_t *esp_apptrace_trax_wait4buf(uint16_t size, esp_apptrace_tm
     {
         // update block pointers
         if (ESP_APPTRACE_TRAX_INBLOCK_MARKER() + size > ESP_APPTRACE_TRAX_INBLOCK_GET()->sz) {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
             *pended = 1;
             ptr = esp_apptrace_rb_produce(&s_trace_buf.trax.rb_pend, size);
             if (ptr == NULL) {
@@ -714,7 +741,7 @@ static uint8_t *esp_apptrace_trax_get_buffer(uint32_t size, esp_apptrace_tmo_t *
         return NULL;
     }
     // check for data in the pending buffer
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
     if (esp_apptrace_rb_read_size_get(&s_trace_buf.trax.rb_pend) > 0) {
         // if we have buffered data try to switch TRAX block
         esp_apptrace_trax_block_switch();
@@ -729,7 +756,7 @@ static uint8_t *esp_apptrace_trax_get_buffer(uint32_t size, esp_apptrace_tmo_t *
             buf_ptr = esp_apptrace_trax_wait4buf(ESP_APPTRACE_USR_BLOCK_RAW_SZ(size), tmo, &pended_buf);
             if (buf_ptr) {
                 if (pended_buf) {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
                     esp_apptrace_trax_pend_chunk_sz_update(ESP_APPTRACE_USR_BLOCK_RAW_SZ(size));
 #endif
                 } else {
@@ -739,18 +766,18 @@ static uint8_t *esp_apptrace_trax_get_buffer(uint32_t size, esp_apptrace_tmo_t *
                 }
             }
         } else {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
             esp_apptrace_trax_pend_chunk_sz_update(ESP_APPTRACE_USR_BLOCK_RAW_SZ(size));
 #endif
         }
     } else
 #endif
     if (ESP_APPTRACE_TRAX_INBLOCK_MARKER() + ESP_APPTRACE_USR_BLOCK_RAW_SZ(size) > ESP_APPTRACE_TRAX_INBLOCK_GET()->sz) {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
         ESP_APPTRACE_LOGD("TRAX full. Get %d bytes from PEND buffer", size);
         buf_ptr = esp_apptrace_rb_produce(&s_trace_buf.trax.rb_pend, ESP_APPTRACE_USR_BLOCK_RAW_SZ(size));
         if (buf_ptr) {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
             esp_apptrace_trax_pend_chunk_sz_update(ESP_APPTRACE_USR_BLOCK_RAW_SZ(size));
 #endif
         }
@@ -761,7 +788,7 @@ static uint8_t *esp_apptrace_trax_get_buffer(uint32_t size, esp_apptrace_tmo_t *
             buf_ptr = esp_apptrace_trax_wait4buf(ESP_APPTRACE_USR_BLOCK_RAW_SZ(size), tmo, &pended_buf);
             if (buf_ptr) {
                 if (pended_buf) {
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
                     esp_apptrace_trax_pend_chunk_sz_update(ESP_APPTRACE_USR_BLOCK_RAW_SZ(size));
 #endif
                 } else {
@@ -845,7 +872,7 @@ static esp_err_t esp_apptrace_trax_status_reg_get(uint32_t *val)
     return ESP_OK;
 }
 
-static esp_err_t esp_apptrace_trax_dest_init()
+static esp_err_t esp_apptrace_trax_dest_init(void)
 {
     for (int i = 0; i < ESP_APPTRACE_TRAX_BLOCKS_NUM; i++) {
         s_trace_buf.trax.blocks[i].start = (uint8_t *)s_trax_blocks[i];
@@ -853,28 +880,29 @@ static esp_err_t esp_apptrace_trax_dest_init()
         s_trace_buf.trax.state.markers[i] = 0;
     }
     s_trace_buf.trax.state.in_block = ESP_APPTRACE_TRAX_INBLOCK_START;
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > 0
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > 0
     esp_apptrace_rb_init(&s_trace_buf.trax.rb_pend, s_trace_buf.trax.pending_data,
                         sizeof(s_trace_buf.trax.pending_data));
-#if CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
+#if CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX > ESP_APPTRACE_TRAX_BLOCK_SIZE
     s_trace_buf.trax.cur_pending_chunk_sz = 0;
     esp_apptrace_rb_init(&s_trace_buf.trax.rb_pend_chunk_sz, (uint8_t *)s_trace_buf.trax.pending_chunk_sz,
                         sizeof(s_trace_buf.trax.pending_chunk_sz));
 #endif
 #endif
 
+#if CONFIG_IDF_TARGET_ESP32
     DPORT_WRITE_PERI_REG(DPORT_PRO_TRACEMEM_ENA_REG, DPORT_PRO_TRACEMEM_ENA_M);
 #if CONFIG_FREERTOS_UNICORE == 0
     DPORT_WRITE_PERI_REG(DPORT_APP_TRACEMEM_ENA_REG, DPORT_APP_TRACEMEM_ENA_M);
 #endif
-    // Expose block 1 to host, block 0 is current trace input buffer
-    DPORT_WRITE_PERI_REG(DPORT_TRACEMEM_MUX_MODE_REG, TRACEMEM_MUX_BLK1_ONLY);
+#endif
+    esp_apptrace_trax_select_memory_block(0);
 
     return ESP_OK;
 }
 #endif
 
-esp_err_t esp_apptrace_init()
+esp_err_t esp_apptrace_init(void)
 {
     int res;
 
@@ -887,7 +915,7 @@ esp_err_t esp_apptrace_init()
             ESP_APPTRACE_LOGE("Failed to init log lock (%d)!", res);
             return res;
         }
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         res = esp_apptrace_trax_dest_init();
         if (res != ESP_OK) {
             ESP_APPTRACE_LOGE("Failed to init TRAX dest data (%d)!", res);
@@ -897,7 +925,7 @@ esp_err_t esp_apptrace_init()
 #endif
     }
 
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
     // init TRAX on this CPU
     esp_apptrace_trax_init();
 #endif
@@ -919,7 +947,7 @@ esp_err_t esp_apptrace_read(esp_apptrace_dest_t dest, void *buf, uint32_t *size,
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -956,7 +984,7 @@ uint8_t *esp_apptrace_down_buffer_get(esp_apptrace_dest_t dest, uint32_t *size,
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -980,7 +1008,7 @@ esp_err_t esp_apptrace_down_buffer_put(esp_apptrace_dest_t dest, uint8_t *ptr, u
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1005,7 +1033,7 @@ esp_err_t esp_apptrace_write(esp_apptrace_dest_t dest, const void *data, uint32_
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1041,7 +1069,7 @@ int esp_apptrace_vprintf_to(esp_apptrace_dest_t dest, uint32_t user_tmo, const c
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1105,7 +1133,7 @@ uint8_t *esp_apptrace_buffer_get(esp_apptrace_dest_t dest, uint32_t size, uint32
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1129,7 +1157,7 @@ esp_err_t esp_apptrace_buffer_put(esp_apptrace_dest_t dest, uint8_t *ptr, uint32
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1153,7 +1181,7 @@ esp_err_t esp_apptrace_flush_nolock(esp_apptrace_dest_t dest, uint32_t min_sz, u
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1197,7 +1225,7 @@ bool esp_apptrace_host_is_connected(esp_apptrace_dest_t dest)
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1215,7 +1243,7 @@ esp_err_t esp_apptrace_status_reg_set(esp_apptrace_dest_t dest, uint32_t val)
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");
@@ -1233,7 +1261,7 @@ esp_err_t esp_apptrace_status_reg_get(esp_apptrace_dest_t dest, uint32_t *val)
     esp_apptrace_hw_t *hw = NULL;
 
     if (dest == ESP_APPTRACE_DEST_TRAX) {
-#if CONFIG_ESP32_APPTRACE_DEST_TRAX
+#if CONFIG_APPTRACE_DEST_TRAX
         hw = ESP_APPTRACE_HW(ESP_APPTRACE_HW_TRAX);
 #else
         ESP_APPTRACE_LOGE("Application tracing via TRAX is disabled in menuconfig!");

components/app_trace/app_trace_util.c

@@ -15,7 +15,12 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
 #include "esp_app_trace_util.h"
+#include "sdkconfig.h"
+#if CONFIG_IDF_TARGET_ESP32
 #include "esp32/clk.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/clk.h"
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////// TIMEOUT /////////////////////////////////////

components/app_trace/component.mk

@@ -22,7 +22,7 @@ COMPONENT_SRCDIRS += \
 	sys_view/esp32 \
 	sys_view/ext
 else
-ifdef CONFIG_ESP32_GCOV_ENABLE
+ifdef CONFIG_APPTRACE_GCOV_ENABLE
 # do not produce gcov info for this module, it is used as transport for gcov
 CFLAGS := $(subst --coverage,,$(CFLAGS))
 COMPONENT_ADD_LDFLAGS += -Wl,--undefined=gcov_rtio_atexit

components/app_trace/gcov/gcov_rtio.c

@@ -14,148 +14,146 @@
 
 // This module implements runtime file I/O API for GCOV.
 
+#include <string.h>
 #include "esp_task_wdt.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
+#include "freertos/semphr.h"
 #include "soc/cpu.h"
 #include "soc/timer_periph.h"
 #include "esp_app_trace.h"
+#include "esp_freertos_hooks.h"
 #include "esp_private/dbg_stubs.h"
+#include "esp_ipc.h"
+#include "hal/wdt_hal.h"
+#if CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/libc_stubs.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/libc_stubs.h"
+#endif
 
-#if CONFIG_ESP32_GCOV_ENABLE
+#if CONFIG_APPTRACE_GCOV_ENABLE
 
 #define ESP_GCOV_DOWN_BUF_SIZE  4200
 
 #define LOG_LOCAL_LEVEL CONFIG_LOG_DEFAULT_LEVEL
 #include "esp_log.h"
 const static char *TAG = "esp_gcov_rtio";
+static volatile bool s_create_gcov_task = false;
+static volatile bool s_gcov_task_running = false;
 
-#if GCC_NOT_5_2_0
-void __gcov_dump(void);
-void __gcov_reset(void);
-#else
-/* The next code for old GCC */
+extern void __gcov_dump(void);
+extern void __gcov_reset(void);
 
-static void (*s_gcov_exit)(void);
-/* Root of a program/shared-object state */
-struct gcov_root
+void gcov_dump_task(void *pvParameter)
 {
-  void *list;
-  unsigned dumped : 1;  /* counts have been dumped.  */
-  unsigned run_counted : 1;  /* run has been accounted for.  */
-  struct gcov_root *next;
-  struct gcov_root *prev;
-};
+    int dump_result = 0;
+    bool *running = (bool *)pvParameter;
 
-/* Per-dynamic-object gcov state.  */
-extern struct gcov_root __gcov_root;
-
-static void esp_gcov_reset_status(void)
-{
-  __gcov_root.dumped = 0;
-  __gcov_root.run_counted = 0;
-}
-#endif
-
-
-static int esp_dbg_stub_gcov_dump_do(void)
-{
-    int ret = ESP_OK;
+    ESP_EARLY_LOGV(TAG, "%s stack use in %d", __FUNCTION__, uxTaskGetStackHighWaterMark(NULL));
 
     ESP_EARLY_LOGV(TAG, "Alloc apptrace down buf %d bytes", ESP_GCOV_DOWN_BUF_SIZE);
     void *down_buf = malloc(ESP_GCOV_DOWN_BUF_SIZE);
     if (down_buf == NULL) {
         ESP_EARLY_LOGE(TAG, "Could not allocate memory for the buffer");
-        return ESP_ERR_NO_MEM;
+        dump_result = ESP_ERR_NO_MEM;
+        goto gcov_exit;
     }
     ESP_EARLY_LOGV(TAG, "Config apptrace down buf");
     esp_apptrace_down_buffer_config(down_buf, ESP_GCOV_DOWN_BUF_SIZE);
+    /* we are directing the std outputs to the fake ones in order to reduce stack usage */
+    FILE *old_stderr = stderr;
+    FILE *old_stdout = stdout;
+    stderr = (FILE *) &__sf_fake_stderr;
+    stdout = (FILE *) &__sf_fake_stdout;
     ESP_EARLY_LOGV(TAG, "Dump data...");
-#if GCC_NOT_5_2_0
     __gcov_dump();
     // reset dump status to allow incremental data accumulation
     __gcov_reset();
-#else
-    ESP_EARLY_LOGV(TAG, "Check for dump handler %p", s_gcov_exit);
-    if (s_gcov_exit) {
-        s_gcov_exit();
-        // reset dump status to allow incremental data accumulation
-        esp_gcov_reset_status();
-    }
-#endif
-    ESP_EARLY_LOGV(TAG, "Free apptrace down buf");
     free(down_buf);
+    stderr = old_stderr;
+    stdout = old_stdout;
     ESP_EARLY_LOGV(TAG, "Finish file transfer session");
-    ret = esp_apptrace_fstop(ESP_APPTRACE_DEST_TRAX);
-    if (ret != ESP_OK) {
-        ESP_EARLY_LOGE(TAG, "Failed to send files transfer stop cmd (%d)!", ret);
+    dump_result = esp_apptrace_fstop(ESP_APPTRACE_DEST_TRAX);
+    if (dump_result != ESP_OK) {
+        ESP_EARLY_LOGE(TAG, "Failed to send files transfer stop cmd (%d)!", dump_result);
+    }
+
+gcov_exit:
+    ESP_EARLY_LOGV(TAG, "dump_result %d", dump_result);
+    if (running) {
+        *running = false;
+    }
+
+    ESP_EARLY_LOGV(TAG, "%s stack use out %d", __FUNCTION__, uxTaskGetStackHighWaterMark(NULL));
+
+    vTaskDelete(NULL);
+}
+
+void gcov_create_task(void *arg)
+{
+    ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
+    xTaskCreatePinnedToCore(&gcov_dump_task, "gcov_dump_task", 2048, (void *)&s_gcov_task_running, configMAX_PRIORITIES - 1, NULL, 0);
+}
+
+void gcov_create_task_tick_hook(void)
+{
+    extern esp_err_t esp_ipc_start_gcov_from_isr(uint32_t cpu_id, esp_ipc_func_t func, void* arg);
+    if (s_create_gcov_task) {
+        if (esp_ipc_start_gcov_from_isr(xPortGetCoreID(), &gcov_create_task, NULL) == ESP_OK) {
+            s_create_gcov_task = false;
+        }
     }
-    return ret;
 }
 
 /**
- * @brief Triggers gcov info dump.
+ * @brief Triggers gcov info dump task
  *        This function is to be called by OpenOCD, not by normal user code.
- * TODO: what about interrupted flash access (when cache disabled)???
+ * TODO: what about interrupted flash access (when cache disabled)
  *
  * @return ESP_OK on success, otherwise see esp_err_t
  */
 static int esp_dbg_stub_gcov_entry(void)
 {
-#if GCC_NOT_5_2_0
-    return esp_dbg_stub_gcov_dump_do();
-#else
-    int ret = ESP_OK;
-    // disable IRQs on this CPU, other CPU is halted by OpenOCD
-    unsigned irq_state = portENTER_CRITICAL_NESTED();
-    ret = esp_dbg_stub_gcov_dump_do();
-    portEXIT_CRITICAL_NESTED(irq_state);
-    return ret;
-#endif
-}
-
-void esp_gcov_dump()
-{
-    // disable IRQs on this CPU, other CPU is halted by OpenOCD
-    unsigned irq_state = portENTER_CRITICAL_NESTED();
-#if !CONFIG_FREERTOS_UNICORE
-    int other_core = xPortGetCoreID() ? 0 : 1;
-    esp_cpu_stall(other_core);
-#endif
-    while (!esp_apptrace_host_is_connected(ESP_APPTRACE_DEST_TRAX)) {
-        // to avoid complains that task watchdog got triggered for other tasks
-        TIMERG0.wdt_wprotect=TIMG_WDT_WKEY_VALUE;
-        TIMERG0.wdt_feed=1;
-        TIMERG0.wdt_wprotect=0;
-        // to avoid reboot on INT_WDT
-        TIMERG1.wdt_wprotect=TIMG_WDT_WKEY_VALUE;
-        TIMERG1.wdt_feed=1;
-        TIMERG1.wdt_wprotect=0;
-    }
-
-    esp_dbg_stub_gcov_dump_do();
-#if !CONFIG_FREERTOS_UNICORE
-    esp_cpu_unstall(other_core);
-#endif
-    portEXIT_CRITICAL_NESTED(irq_state);
+    /* we are in isr context here */
+    s_create_gcov_task = true;
+    return ESP_OK;
 }
 
 int gcov_rtio_atexit(void (*function)(void) __attribute__ ((unused)))
 {
-#if GCC_NOT_5_2_0
+    uint32_t capabilities = 0;
     ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
-#else
-    ESP_EARLY_LOGV(TAG, "%s %p", __FUNCTION__, function);
-    s_gcov_exit = function;
-#endif
     esp_dbg_stub_entry_set(ESP_DBG_STUB_ENTRY_GCOV, (uint32_t)&esp_dbg_stub_gcov_entry);
-    return 0;
+    if (esp_dbg_stub_entry_get(ESP_DBG_STUB_ENTRY_CAPABILITIES, &capabilities) == ESP_OK) {
+        esp_dbg_stub_entry_set(ESP_DBG_STUB_ENTRY_CAPABILITIES, capabilities | ESP_DBG_STUB_CAP_GCOV_TASK);
+    }
+    esp_register_freertos_tick_hook(gcov_create_task_tick_hook);
+    return ESP_OK;
+}
+
+void esp_gcov_dump(void)
+{
+    ESP_EARLY_LOGV(TAG, "%s", __FUNCTION__);
+
+    while (!esp_apptrace_host_is_connected(ESP_APPTRACE_DEST_TRAX)) {
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
+
+    /* We are not in isr context here. Waiting for the completion is safe */
+    s_gcov_task_running = true;
+    s_create_gcov_task = true;
+    while (s_gcov_task_running) {
+        vTaskDelay(pdMS_TO_TICKS(10));
+    }
 }
 
 void *gcov_rtio_fopen(const char *path, const char *mode)
 {
     ESP_EARLY_LOGV(TAG, "%s '%s' '%s'", __FUNCTION__, path, mode);
-    return esp_apptrace_fopen(ESP_APPTRACE_DEST_TRAX, path, mode);
+    void *f = esp_apptrace_fopen(ESP_APPTRACE_DEST_TRAX, path, mode);
+    ESP_EARLY_LOGV(TAG, "%s ret %p", __FUNCTION__, f);
+    return f;
 }
 
 int gcov_rtio_fclose(void *stream)
@@ -166,7 +164,7 @@ int gcov_rtio_fclose(void *stream)
 
 size_t gcov_rtio_fread(void *ptr, size_t size, size_t nmemb, void *stream)
 {
-    ESP_EARLY_LOGV(TAG, "%s read %u", __FUNCTION__, size*nmemb);
+    ESP_EARLY_LOGV(TAG, "%s read %u", __FUNCTION__, size * nmemb);
     size_t sz = esp_apptrace_fread(ESP_APPTRACE_DEST_TRAX, ptr, size, nmemb, stream);
     ESP_EARLY_LOGV(TAG, "%s actually read %u", __FUNCTION__, sz);
     return sz;

components/app_trace/heap_trace_tohost.c

@@ -32,7 +32,7 @@
 
 static bool s_tracing;
 
-esp_err_t heap_trace_init_tohost()
+esp_err_t heap_trace_init_tohost(void)
 {
     if (s_tracing) {
         return ESP_ERR_INVALID_STATE;

components/app_trace/host_file_io.c

@@ -25,7 +25,7 @@
 #include <string.h>
 #include "esp_app_trace.h"
 
-#if CONFIG_ESP32_APPTRACE_ENABLE
+#if CONFIG_APPTRACE_ENABLE
 
 #define LOG_LOCAL_LEVEL CONFIG_LOG_DEFAULT_LEVEL
 #include "esp_log.h"

components/app_trace/include/esp_app_trace.h

@@ -18,6 +18,10 @@
 #include "esp_err.h"
 #include "esp_app_trace_util.h" // ESP_APPTRACE_TMO_INFINITE
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * Application trace data destinations bits.
  */
@@ -33,7 +37,7 @@ typedef enum {
  *
  * @return ESP_OK on success, otherwise see esp_err_t
  */
-esp_err_t esp_apptrace_init();
+esp_err_t esp_apptrace_init(void);
 
 /**
  * @brief Configures down buffer.
@@ -262,4 +266,8 @@ int esp_apptrace_fstop(esp_apptrace_dest_t dest);
  */
 void esp_gcov_dump(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

components/app_trace/include/esp_app_trace_util.h

@@ -14,6 +14,10 @@
 #ifndef ESP_APP_TRACE_UTIL_H_
 #define ESP_APP_TRACE_UTIL_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include "freertos/FreeRTOS.h"
 #include "esp_err.h"
 
@@ -164,4 +168,8 @@ uint32_t esp_apptrace_rb_read_size_get(esp_apptrace_rb_t *rb);
  */
 uint32_t esp_apptrace_rb_write_size_get(esp_apptrace_rb_t *rb);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif //ESP_APP_TRACE_UTIL_H_

components/app_trace/include/esp_sysview_trace.h

@@ -14,6 +14,10 @@
 #ifndef ESP_SYSVIEW_TRACE_H_
 #define ESP_SYSVIEW_TRACE_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdarg.h>
 #include "esp_err.h"
 #include "SEGGER_RTT.h" // SEGGER_RTT_ESP32_Flush
@@ -77,4 +81,8 @@ void esp_sysview_heap_trace_alloc(void *addr, uint32_t size, const void *callers
  */
 void esp_sysview_heap_trace_free(void *addr, const void *callers);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif //ESP_SYSVIEW_TRACE_H_

components/app_trace/linker.lf

@@ -9,7 +9,7 @@ entries:
       SEGGER_SYSVIEW_Config_FreeRTOS (noflash)
       SEGGER_SYSVIEW_FreeRTOS (noflash)
 
-[mapping:driver]
+[mapping:app_trace_driver]
 archive: libdriver.a
 entries:
     if SYSVIEW_TS_SOURCE_TIMER_00 = y || SYSVIEW_TS_SOURCE_TIMER_01 = y

components/app_trace/project_include.cmake

@@ -5,12 +5,24 @@ function(idf_create_coverage_report report_dir)
     set(gcov_tool ${CONFIG_SDK_TOOLPREFIX}gcov)
     idf_build_get_property(project_name PROJECT_NAME)
 
-    add_custom_target(lcov-report
+    add_custom_target(pre-cov-report
         COMMENT "Generating coverage report in: ${report_dir}"
         COMMAND ${CMAKE_COMMAND} -E echo "Using gcov: ${gcov_tool}"
         COMMAND ${CMAKE_COMMAND} -E make_directory ${report_dir}/html
+        )
+
+    add_custom_target(lcov-report
+        COMMENT "WARNING: lcov-report is deprecated. Please use gcovr-report instead."
         COMMAND lcov --gcov-tool ${gcov_tool} -c -d ${CMAKE_CURRENT_BINARY_DIR} -o ${report_dir}/${project_name}.info
-        COMMAND genhtml -o ${report_dir}/html ${report_dir}/${project_name}.info)
+        COMMAND genhtml -o ${report_dir}/html ${report_dir}/${project_name}.info
+        DEPENDS pre-cov-report
+        )
+
+    add_custom_target(gcovr-report
+        COMMAND gcovr -r ${project_dir} --gcov-executable ${gcov_tool} -s --html-details ${report_dir}/html/index.html
+        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+        DEPENDS pre-cov-report
+        )
 endfunction()
 
 # idf_clean_coverage_report
@@ -20,4 +32,4 @@ function(idf_clean_coverage_report report_dir)
     add_custom_target(cov-data-clean
         COMMENT "Clean coverage report in: ${report_dir}"
         COMMAND ${CMAKE_COMMAND} -E remove_directory ${report_dir})
-endfunction()
+endfunction()

components/app_trace/sdkconfig.rename

@@ -1,4 +1,12 @@
 # sdkconfig replacement configurations for deprecated options formatted as
 # CONFIG_DEPRECATED_OPTION CONFIG_NEW_OPTION
 
-CONFIG_ESP32_APPTRACE_POSTMORTEM_FLUSH_TRAX_THRESH      CONFIG_ESP32_APPTRACE_POSTMORTEM_FLUSH_THRESH
+CONFIG_ESP32_APPTRACE_DESTINATION      					CONFIG_APPTRACE_DESTINATION
+CONFIG_ESP32_APPTRACE_DEST_NONE							CONFIG_APPTRACE_DEST_NONE
+CONFIG_ESP32_APPTRACE_DEST_TRAX							CONFIG_APPTRACE_DEST_TRAX
+CONFIG_ESP32_APPTRACE_ENABLE							CONFIG_APPTRACE_ENABLE
+CONFIG_ESP32_APPTRACE_LOCK_ENABLE						CONFIG_APPTRACE_LOCK_ENABLE
+CONFIG_ESP32_APPTRACE_ONPANIC_HOST_FLUSH_TMO			CONFIG_APPTRACE_ONPANIC_HOST_FLUSH_TMO
+CONFIG_ESP32_APPTRACE_POSTMORTEM_FLUSH_TRAX_THRESH      CONFIG_APPTRACE_POSTMORTEM_FLUSH_THRESH
+CONFIG_ESP32_APPTRACE_PENDING_DATA_SIZE_MAX				CONFIG_APPTRACE_PENDING_DATA_SIZE_MAX
+CONFIG_ESP32_GCOV_ENABLE								CONFIG_APPTRACE_GCOV_ENABLE

components/app_trace/sys_view/Config/SEGGER_RTT_Conf.h

@@ -285,12 +285,12 @@ Revision: $Rev: 5626 $
 *       RTT lock configuration fallback
 */
 #ifndef   SEGGER_RTT_LOCK
-  void SEGGER_SYSVIEW_X_RTT_Lock();
+  void SEGGER_SYSVIEW_X_RTT_Lock(void);
   #define SEGGER_RTT_LOCK()                SEGGER_SYSVIEW_X_RTT_Lock() // Lock RTT (nestable)   (i.e. disable interrupts)
 #endif
 
 #ifndef   SEGGER_RTT_UNLOCK
-  void SEGGER_SYSVIEW_X_RTT_Unlock();
+  void SEGGER_SYSVIEW_X_RTT_Unlock(void);
   #define SEGGER_RTT_UNLOCK()              SEGGER_SYSVIEW_X_RTT_Unlock() // Unlock RTT (nestable) (i.e. enable previous interrupt lock state)
 #endif
 

components/app_trace/sys_view/Config/SEGGER_SYSVIEW_Conf.h

@@ -65,6 +65,8 @@ Revision: $Rev: 5927 $
 #ifndef SEGGER_SYSVIEW_CONF_H
 #define SEGGER_SYSVIEW_CONF_H
 
+#include "soc/soc.h"
+
 /*********************************************************************
 *
 *       Defines, fixed
@@ -147,7 +149,7 @@ Revision: $Rev: 5927 $
 *       SystemView Id configuration
 */
 //TODO: optimise it
-#define SEGGER_SYSVIEW_ID_BASE         0x3F400000                               // Default value for the lowest Id reported by the application. Can be overridden by the application via SEGGER_SYSVIEW_SetRAMBase(). (i.e. 0x20000000 when all Ids are an address in this RAM)
+#define SEGGER_SYSVIEW_ID_BASE         SOC_DROM_LOW                             // Default value for the lowest Id reported by the application. Can be overridden by the application via SEGGER_SYSVIEW_SetRAMBase(). (i.e. 0x20000000 when all Ids are an address in this RAM)
 #define SEGGER_SYSVIEW_ID_SHIFT        0                                        // Number of bits to shift the Id to save bandwidth. (i.e. 2 when Ids are 4 byte aligned)
 
 /*********************************************************************
@@ -166,7 +168,7 @@ Revision: $Rev: 5927 $
   #define SEGGER_SYSVIEW_GET_INTERRUPT_ID()   SEGGER_SYSVIEW_X_GetInterruptId() // Get the currently active interrupt Id from the user-provided function.
 #endif
 
-unsigned SEGGER_SYSVIEW_X_SysView_Lock();
+unsigned SEGGER_SYSVIEW_X_SysView_Lock(void);
 void SEGGER_SYSVIEW_X_SysView_Unlock(unsigned int_state);
 // to be recursive save IRQ status on the stack of the caller
 #define SEGGER_SYSVIEW_LOCK()   unsigned _SYSVIEW_int_state = SEGGER_SYSVIEW_X_SysView_Lock()

components/app_trace/sys_view/Sample/Config/SEGGER_SYSVIEW_Config_FreeRTOS.c

@@ -63,11 +63,26 @@ Revision: $Rev: 3734 $
 */
 #include "freertos/FreeRTOS.h"
 #include "SEGGER_SYSVIEW.h"
+#if CONFIG_IDF_TARGET_ESP32
 #include "esp32/rom/ets_sys.h"
+#include "esp32/clk.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/ets_sys.h"
+#include "esp32s2/clk.h"
+#endif
 #include "esp_app_trace.h"
 #include "esp_app_trace_util.h"
 #include "esp_intr_alloc.h"
+#include "soc/soc.h"
+#include "soc/interrupts.h"
+#if CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/ets_sys.h"
 #include "esp32/clk.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/ets_sys.h"
+#include "esp32s2/clk.h"
+#endif
+
 
 extern const SEGGER_SYSVIEW_OS_API SYSVIEW_X_OS_TraceAPI;
 
@@ -81,7 +96,7 @@ extern const SEGGER_SYSVIEW_OS_API SYSVIEW_X_OS_TraceAPI;
 #define SYSVIEW_APP_NAME        "FreeRTOS Application"
 
 // The target device name
-#define SYSVIEW_DEVICE_NAME     "ESP32"
+#define SYSVIEW_DEVICE_NAME     CONFIG_IDF_TARGET
 
 // Determine which timer to use as timestamp source
 #if CONFIG_SYSVIEW_TS_SOURCE_CCOUNT
@@ -123,14 +138,18 @@ extern const SEGGER_SYSVIEW_OS_API SYSVIEW_X_OS_TraceAPI;
 
 #if TS_USE_CCOUNT
 // CCOUNT is incremented at CPU frequency
+#if CONFIG_IDF_TARGET_ESP32
 #define SYSVIEW_TIMESTAMP_FREQ  (CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ * 1000000)
+#elif CONFIG_IDF_TARGET_ESP32S2
+#define SYSVIEW_TIMESTAMP_FREQ  (CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ * 1000000)
+#endif
 #endif // TS_USE_CCOUNT
 
 // System Frequency.
 #define SYSVIEW_CPU_FREQ        (esp_clk_cpu_freq())
 
 // The lowest RAM address used for IDs (pointers)
-#define SYSVIEW_RAM_BASE        (0x3F400000)
+#define SYSVIEW_RAM_BASE        (SOC_DROM_LOW)
 
 #if CONFIG_FREERTOS_CORETIMER_0
     #define SYSTICK_INTR_ID (ETS_INTERNAL_TIMER0_INTR_SOURCE+ETS_INTERNAL_INTR_SOURCE_OFF)
@@ -147,78 +166,6 @@ extern const SEGGER_SYSVIEW_OS_API SYSVIEW_X_OS_TraceAPI;
 
 static esp_apptrace_lock_t s_sys_view_lock = {.mux = portMUX_INITIALIZER_UNLOCKED, .int_state = 0};
 
-static const char * const s_isr_names[] = {
-    [0] = "WIFI_MAC",
-    [1] = "WIFI_NMI",
-    [2] = "WIFI_BB",
-    [3] = "BT_MAC",
-    [4] = "BT_BB",
-    [5] = "BT_BB_NMI",
-    [6] = "RWBT",
-    [7] = "RWBLE",
-    [8] = "RWBT_NMI",
-    [9] = "RWBLE_NMI",
-    [10] = "SLC0",
-    [11] = "SLC1",
-    [12] = "UHCI0",
-    [13] = "UHCI1",
-    [14] = "TG0_T0_LEVEL",
-    [15] = "TG0_T1_LEVEL",
-    [16] = "TG0_WDT_LEVEL",
-    [17] = "TG0_LACT_LEVEL",
-    [18] = "TG1_T0_LEVEL",
-    [19] = "TG1_T1_LEVEL",
-    [20] = "TG1_WDT_LEVEL",
-    [21] = "TG1_LACT_LEVEL",
-    [22] = "GPIO",
-    [23] = "GPIO_NMI",
-    [24] = "FROM_CPU0",
-    [25] = "FROM_CPU1",
-    [26] = "FROM_CPU2",
-    [27] = "FROM_CPU3",
-    [28] = "SPI0",
-    [29] = "SPI1",
-    [30] = "SPI2",
-    [31] = "SPI3",
-    [32] = "I2S0",
-    [33] = "I2S1",
-    [34] = "UART0",
-    [35] = "UART1",
-    [36] = "UART2",
-    [37] = "SDIO_HOST",
-    [38] = "ETH_MAC",
-    [39] = "PWM0",
-    [40] = "PWM1",
-    [41] = "PWM2",
-    [42] = "PWM3",
-    [43] = "LEDC",
-    [44] = "EFUSE",
-    [45] = "CAN",
-    [46] = "RTC_CORE",
-    [47] = "RMT",
-    [48] = "PCNT",
-    [49] = "I2C_EXT0",
-    [50] = "I2C_EXT1",
-    [51] = "RSA",
-    [52] = "SPI1_DMA",
-    [53] = "SPI2_DMA",
-    [54] = "SPI3_DMA",
-    [55] = "WDT",
-    [56] = "TIMER1",
-    [57] = "TIMER2",
-    [58] = "TG0_T0_EDGE",
-    [59] = "TG0_T1_EDGE",
-    [60] = "TG0_WDT_EDGE",
-    [61] = "TG0_LACT_EDGE",
-    [62] = "TG1_T0_EDGE",
-    [63] = "TG1_T1_EDGE",
-    [64] = "TG1_WDT_EDGE",
-    [65] = "TG1_LACT_EDGE",
-    [66] = "MMU_IA",
-    [67] = "MPU_IA",
-    [68] = "CACHE_IA",
-};
-
 /*********************************************************************
 *
 *       _cbSendSystemDesc()
@@ -231,9 +178,9 @@ static void _cbSendSystemDesc(void) {
     SEGGER_SYSVIEW_SendSysDesc("N="SYSVIEW_APP_NAME",D="SYSVIEW_DEVICE_NAME",C=Xtensa,O=FreeRTOS");
     snprintf(irq_str, sizeof(irq_str), "I#%d=SysTick", SYSTICK_INTR_ID);
     SEGGER_SYSVIEW_SendSysDesc(irq_str);
-    size_t isr_count = sizeof(s_isr_names)/sizeof(s_isr_names[0]);
+    size_t isr_count = sizeof(esp_isr_names)/sizeof(esp_isr_names[0]);
     for (size_t i = 0; i < isr_count; ++i) {
-        snprintf(irq_str, sizeof(irq_str), "I#%d=%s", ETS_INTERNAL_INTR_SOURCE_OFF + i, s_isr_names[i]);
+        snprintf(irq_str, sizeof(irq_str), "I#%d=%s", ETS_INTERNAL_INTR_SOURCE_OFF + i, esp_isr_names[i]);
         SEGGER_SYSVIEW_SendSysDesc(irq_str);
     }
 }
@@ -244,7 +191,7 @@ static void _cbSendSystemDesc(void) {
 *
 **********************************************************************
 */
-static void SEGGER_SYSVIEW_TS_Init()
+static void SEGGER_SYSVIEW_TS_Init(void)
 {
     /* We only need to initialize something if we use Timer Group.
      * esp_timer and ccount can be used as is.
@@ -316,7 +263,7 @@ void SEGGER_SYSVIEW_Conf(void) {
   SEGGER_SYSVIEW_DisableEvents(disable_evts);
 }
 
-U32 SEGGER_SYSVIEW_X_GetTimestamp()
+U32 SEGGER_SYSVIEW_X_GetTimestamp(void)
 {
 #if TS_USE_TIMERGROUP
     uint64_t ts = 0;
@@ -329,15 +276,15 @@ U32 SEGGER_SYSVIEW_X_GetTimestamp()
 #endif
 }
 
-void SEGGER_SYSVIEW_X_RTT_Lock()
+void SEGGER_SYSVIEW_X_RTT_Lock(void)
 {
 }
 
-void SEGGER_SYSVIEW_X_RTT_Unlock()
+void SEGGER_SYSVIEW_X_RTT_Unlock(void)
 {
 }
 
-unsigned SEGGER_SYSVIEW_X_SysView_Lock()
+unsigned SEGGER_SYSVIEW_X_SysView_Lock(void)
 {
     esp_apptrace_tmo_t tmo;
     esp_apptrace_tmo_init(&tmo, SEGGER_LOCK_WAIT_TMO);

components/app_trace/sys_view/esp32/SEGGER_RTT_esp32.c

@@ -18,7 +18,11 @@
 #include "SEGGER_SYSVIEW.h"
 #include "SEGGER_SYSVIEW_Conf.h"
 
+#if CONFIG_IDF_TARGET_ESP32
 #include "esp32/rom/ets_sys.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/ets_sys.h"
+#endif
 #include "esp_app_trace.h"
 
 #include "esp_log.h"

components/app_trace/test/CMakeLists.txt

@@ -1,3 +1,3 @@
 idf_component_register(SRC_DIRS "."
-                    INCLUDE_DIRS "."
-                    REQUIRES unity)
+                    PRIV_INCLUDE_DIRS "."
+                    PRIV_REQUIRES unity)

components/app_trace/test/test_trace.c

@@ -9,7 +9,7 @@
 #include "freertos/FreeRTOS.h"
 #include "freertos/semphr.h"
 #include "freertos/task.h"
-#if CONFIG_ESP32_APPTRACE_ENABLE == 1
+#if CONFIG_APPTRACE_ENABLE == 1
 #include "esp_app_trace.h"
 #include "esp_app_trace_util.h"
 
@@ -125,7 +125,7 @@ typedef struct {
 static SemaphoreHandle_t s_print_lock;
 #endif
 
-static uint64_t esp_apptrace_test_ts_get();
+static uint64_t esp_apptrace_test_ts_get(void);
 
 static void esp_apptrace_test_timer_isr(void *arg)
 {
@@ -145,56 +145,16 @@ static void esp_apptrace_test_timer_isr(void *arg)
     }
 
     tim_arg->data.wr_cnt++;
-    if (tim_arg->group == 0) {
-        if (tim_arg->id == 0) {
-            TIMERG0.int_clr_timers.t0 = 1;
-            TIMERG0.hw_timer[0].update = 1;
-            TIMERG0.hw_timer[0].config.alarm_en = 1;
-        } else {
-            TIMERG0.int_clr_timers.t1 = 1;
-            TIMERG0.hw_timer[1].update = 1;
-            TIMERG0.hw_timer[1].config.alarm_en = 1;
-        }
-    }
-    if (tim_arg->group == 1) {
-        if (tim_arg->id == 0) {
-            TIMERG1.int_clr_timers.t0 = 1;
-            TIMERG1.hw_timer[0].update = 1;
-            TIMERG1.hw_timer[0].config.alarm_en = 1;
-        } else {
-            TIMERG1.int_clr_timers.t1 = 1;
-            TIMERG1.hw_timer[1].update = 1;
-            TIMERG1.hw_timer[1].config.alarm_en = 1;
-        }
-    }
+    timer_group_clr_intr_status_in_isr(tim_arg->group, tim_arg->id);
+    timer_group_enable_alarm_in_isr(tim_arg->group, tim_arg->id);
 }
 
 static void esp_apptrace_test_timer_isr_crash(void *arg)
 {
     esp_apptrace_test_timer_arg_t *tim_arg = (esp_apptrace_test_timer_arg_t *)arg;
 
-    if (tim_arg->group == 0) {
-        if (tim_arg->id == 0) {
-            TIMERG0.int_clr_timers.t0 = 1;
-            TIMERG0.hw_timer[0].update = 1;
-            TIMERG0.hw_timer[0].config.alarm_en = 1;
-        } else {
-            TIMERG0.int_clr_timers.t1 = 1;
-            TIMERG0.hw_timer[1].update = 1;
-            TIMERG0.hw_timer[1].config.alarm_en = 1;
-        }
-    }
-    if (tim_arg->group == 1) {
-        if (tim_arg->id == 0) {
-            TIMERG1.int_clr_timers.t0 = 1;
-            TIMERG1.hw_timer[0].update = 1;
-            TIMERG1.hw_timer[0].config.alarm_en = 1;
-        } else {
-            TIMERG1.int_clr_timers.t1 = 1;
-            TIMERG1.hw_timer[1].update = 1;
-            TIMERG1.hw_timer[1].config.alarm_en = 1;
-        }
-    }
+    timer_group_clr_intr_status_in_isr(tim_arg->group, tim_arg->id);
+    timer_group_enable_alarm_in_isr(tim_arg->group, tim_arg->id);
     if (tim_arg->data.wr_cnt < ESP_APPTRACE_TEST_BLOCKS_BEFORE_CRASH) {
         uint32_t *ts = (uint32_t *)(tim_arg->data.buf + sizeof(uint32_t));
         *ts = (uint32_t)esp_apptrace_test_ts_get();//xthal_get_ccount();//xTaskGetTickCount();
@@ -383,7 +343,7 @@ static void esp_apptrace_test_task_crash(void *p)
 
 static int s_ts_timer_group, s_ts_timer_idx;
 
-static uint64_t esp_apptrace_test_ts_get()
+static uint64_t esp_apptrace_test_ts_get(void)
 {
     uint64_t ts = 0;
     timer_get_counter_value(s_ts_timer_group, s_ts_timer_idx, &ts);
@@ -413,7 +373,7 @@ static void esp_apptrace_test_ts_init(int timer_group, int timer_idx)
     timer_start(timer_group, timer_idx);
 }
 
-static void esp_apptrace_test_ts_cleanup()
+static void esp_apptrace_test_ts_cleanup(void)
 {
     timer_config_t config;
 
@@ -850,28 +810,8 @@ static void esp_sysview_test_timer_isr(void *arg)
 
     //ESP_APPTRACE_TEST_LOGI("tim-%d: IRQ %d/%d\n", tim_arg->id, tim_arg->group, tim_arg->timer);
 
-    if (tim_arg->group == 0) {
-        if (tim_arg->timer == 0) {
-            TIMERG0.int_clr_timers.t0 = 1;
-            TIMERG0.hw_timer[0].update = 1;
-            TIMERG0.hw_timer[0].config.alarm_en = 1;
-        } else {
-            TIMERG0.int_clr_timers.t1 = 1;
-            TIMERG0.hw_timer[1].update = 1;
-            TIMERG0.hw_timer[1].config.alarm_en = 1;
-        }
-    }
-    if (tim_arg->group == 1) {
-        if (tim_arg->timer == 0) {
-            TIMERG1.int_clr_timers.t0 = 1;
-            TIMERG1.hw_timer[0].update = 1;
-            TIMERG1.hw_timer[0].config.alarm_en = 1;
-        } else {
-            TIMERG1.int_clr_timers.t1 = 1;
-            TIMERG1.hw_timer[1].update = 1;
-            TIMERG1.hw_timer[1].config.alarm_en = 1;
-        }
-    }
+    timer_group_clr_intr_status_in_isr(tim_arg->group, tim_arg->id);
+    timer_group_enable_alarm_in_isr(tim_arg->group, tim_arg->id);
 }
 
 static void esp_sysviewtrace_test_task(void *p)

components/app_update/CMakeLists.txt

@@ -7,11 +7,18 @@ idf_component_register(SRCS "esp_ota_ops.c"
 # linker will ignore this structure as it has no other files depending on it.
 target_link_libraries(${COMPONENT_LIB} INTERFACE "-u esp_app_desc")
 
+if(CONFIG_APP_PROJECT_VER_FROM_CONFIG)
+    # Ignore current PROJECT_VER (which was set in __project_get_revision()).
+    # Gets the version from the CONFIG_APP_PROJECT_VER.
+    idf_build_set_property(PROJECT_VER "${CONFIG_APP_PROJECT_VER}")
+endif()
+
 # cut PROJECT_VER and PROJECT_NAME to required 32 characters.
 idf_build_get_property(project_ver PROJECT_VER)
 idf_build_get_property(project_name PROJECT_NAME)
 string(SUBSTRING "${project_ver}" 0 31 PROJECT_VER_CUT)
 string(SUBSTRING "${project_name}" 0 31 PROJECT_NAME_CUT)
+message(STATUS "App \"${PROJECT_NAME_CUT}\" version: ${PROJECT_VER_CUT}")
 
 set_source_files_properties(
     SOURCE "esp_app_desc.c"
@@ -29,8 +36,11 @@ if(NOT BOOTLOADER_BUILD)
 
         idf_build_get_property(idf_path IDF_PATH)
         idf_build_get_property(python PYTHON)
+
+        idf_component_get_property(partition_table_dir partition_table COMPONENT_DIR)
+
         add_custom_command(OUTPUT ${blank_otadata_file}
-            COMMAND ${python} ${idf_path}/components/partition_table/gen_empty_partition.py
+            COMMAND ${python} ${partition_table_dir}/gen_empty_partition.py
             ${otadata_size} ${blank_otadata_file})
 
         add_custom_target(blank_ota_data ALL DEPENDS ${blank_otadata_file})
@@ -52,6 +62,11 @@ if(NOT BOOTLOADER_BUILD)
                         --partition-table-offset ${PARTITION_TABLE_OFFSET}
                         erase_otadata)
 
-        esptool_py_flash_project_args(otadata ${otadata_offset} "${blank_otadata_file}" FLASH_IN_PROJECT)
+        idf_component_get_property(main_args esptool_py FLASH_ARGS)
+        idf_component_get_property(sub_args esptool_py FLASH_SUB_ARGS)
+        esptool_py_flash_target(otadata-flash "${main_args}" "${sub_args}")
+        esptool_py_flash_target_image(otadata-flash otadata "${otadata_offset}" "${blank_otadata_file}")
+
+        esptool_py_flash_target_image(flash otadata "${otadata_offset}" "${blank_otadata_file}")
     endif()
 endif()

components/app_update/Kconfig.projbuild

@@ -22,6 +22,20 @@ menu "Application manager"
             The PROJECT_NAME variable from the build system will not affect the firmware image.
             This value will not be contained in the esp_app_desc structure.
 
+    config APP_PROJECT_VER_FROM_CONFIG
+        bool "Get the project version from Kconfig"
+        default n
+        help
+            If this is enabled, then config item APP_PROJECT_VER will be used for the variable PROJECT_VER.
+            Other ways to set PROJECT_VER will be ignored.
+
+    config APP_PROJECT_VER
+        string "Project version"
+        default "1"
+        depends on APP_PROJECT_VER_FROM_CONFIG
+        help
+            Project version
+
     config APP_RETRIEVE_LEN_ELF_SHA
         int "The length of APP ELF SHA is stored in RAM(chars)"
         default 16

components/app_update/component.mk

@@ -8,49 +8,49 @@
 COMPONENT_ADD_LDFLAGS += -u esp_app_desc
 
 ifndef IS_BOOTLOADER_BUILD
-GET_PROJECT_VER ?=
-ifeq ("${PROJECT_VER}", "")
-ifeq ("$(wildcard ${PROJECT_PATH}/version.txt)","")
+    # If ``CONFIG_APP_PROJECT_VER_FROM_CONFIG`` option is set, the value of ``CONFIG_APP_PROJECT_VER`` will be used
+    # Else, if ``PROJECT_VER`` variable set in project Makefile file, its value will be used.
+    # Else, if the ``$PROJECT_PATH/version.txt`` exists, its contents will be used as ``PROJECT_VER``.
+    # Else, if the project is located inside a Git repository, the output of git describe will be used.
+    # Otherwise, ``PROJECT_VER`` will be "1".
+    ifdef CONFIG_APP_PROJECT_VER_FROM_CONFIG
+        PROJECT_VER:= $(CONFIG_APP_PROJECT_VER)
+    else
+        ifneq ("${PROJECT_VER}", "")
+            PROJECT_VER:= $(PROJECT_VER)
+        else
+            ifneq ("$(wildcard ${PROJECT_PATH}/version.txt)","")
+                PROJECT_VER := $(shell cat ${PROJECT_PATH}/version.txt)
+            else
+                GIT_PROJECT_VER := $(shell cd ${PROJECT_PATH} && git describe --always --tags --dirty 2> /dev/null)
+                ifeq ("${GIT_PROJECT_VER}", "")
+                    PROJECT_VER := "1"
+                    $(info Project is not inside a git repository, or git repository has no commits)
+                    $(info will not use 'git describe' to determine PROJECT_VER.)
+                else
+                    PROJECT_VER:= $(GIT_PROJECT_VER)
+                endif # a git repository
+            endif # version.txt
+        endif # PROJECT_VER
+    endif # CONFIG_APP_PROJECT_VER_FROM_CONFIG
 
-GET_PROJECT_VER := $(shell cd ${PROJECT_PATH} && git describe --always --tags --dirty 2> /dev/null)
-ifeq ("${GET_PROJECT_VER}", "")
-GET_PROJECT_VER := "1"
-$(info Project is not inside a git repository, will not use 'git describe' to determine PROJECT_VER.)
-endif
+    # cut PROJECT_VER and PROJECT_NAME to required 32 characters.
+    PROJECT_VER_CUT  := $(shell echo "$(PROJECT_VER)"  | cut -c 1-31)
+    PROJECT_NAME_CUT := $(shell echo "$(PROJECT_NAME)" | cut -c 1-31)
 
-else
-# read from version.txt
-GET_PROJECT_VER := $(shell cat ${PROJECT_PATH}/version.txt)
-endif
-endif
-# If ``PROJECT_VER`` variable set in project Makefile file, its value will be used.
-# Else, if the ``$PROJECT_PATH/version.txt`` exists, its contents will be used as ``PROJECT_VER``.
-# Else, if the project is located inside a Git repository, the output of git describe will be used.
-# Otherwise, ``PROJECT_VER`` will be "1".
+    $(info App "$(PROJECT_NAME_CUT)" version: $(PROJECT_VER_CUT))
 
-ifeq ("${PROJECT_VER}", "")
-PROJECT_VER:= $(GET_PROJECT_VER)
-else
-PROJECT_VER:= $(PROJECT_VER)
-endif
+    NEW_DEFINES:= "$(PROJECT_VER_CUT) $(PROJECT_NAME_CUT) $(IDF_VER)"
+    ifeq ("$(wildcard ${TMP_DEFINES})","")
+        OLD_DEFINES:= ""
+    else
+        OLD_DEFINES:= "$(shell cat $(TMP_DEFINES))"
+    endif
 
-# cut PROJECT_VER and PROJECT_NAME to required 32 characters.
-PROJECT_VER_CUT  := $(shell echo "$(PROJECT_VER)"  | cut -c 1-31)
-PROJECT_NAME_CUT := $(shell echo "$(PROJECT_NAME)" | cut -c 1-31)
+    # If NEW_DEFINES (PROJECT_VER, PROJECT_NAME) were changed then rebuild only esp_app_desc.
+    ifneq (${NEW_DEFINES}, ${OLD_DEFINES})
+        $(shell echo $(NEW_DEFINES) > $(TMP_DEFINES); rm -f esp_app_desc.o;)
+    endif
 
-$(info App "$(PROJECT_NAME_CUT)" version: $(PROJECT_VER_CUT))
-
-NEW_DEFINES:= "$(PROJECT_VER_CUT) $(PROJECT_NAME_CUT) $(IDF_VER)"
-ifeq ("$(wildcard ${TMP_DEFINES})","")
-OLD_DEFINES:= ""
-else
-OLD_DEFINES:= "$(shell cat $(TMP_DEFINES))"
-endif
-
-# If NEW_DEFINES (PROJECT_VER, PROJECT_NAME) were changed then rebuild only esp_app_desc.
-ifneq (${NEW_DEFINES}, ${OLD_DEFINES})
-$(shell echo $(NEW_DEFINES) > $(TMP_DEFINES); rm -f esp_app_desc.o;)
-endif
-
-esp_app_desc.o: CPPFLAGS += -D PROJECT_VER=\""$(PROJECT_VER_CUT)"\" -D PROJECT_NAME=\""$(PROJECT_NAME_CUT)"\"
-endif
+    esp_app_desc.o: CPPFLAGS += -D PROJECT_VER=\""$(PROJECT_VER_CUT)"\" -D PROJECT_NAME=\""$(PROJECT_NAME_CUT)"\"
+endif # IS_BOOTLOADER_BUILD

components/app_update/esp_app_desc.c

@@ -89,7 +89,10 @@ int IRAM_ATTR esp_ota_get_app_elf_sha256(char* dst, size_t size)
     static bool first_call = true;
     if (first_call) {
         first_call = false;
-        const uint8_t* src = esp_app_desc.app_elf_sha256;
+        // At -O2 optimization level, GCC optimizes out the copying of the first byte of the app_elf_sha256,
+        // because it is zero at compile time, and only modified afterwards by esptool.
+        // Casting to volatile disables the optimization.
+        const volatile uint8_t* src = (const volatile uint8_t*)esp_app_desc.app_elf_sha256;
         for (size_t i = 0; i < sizeof(s_app_elf_sha256); ++i) {
             s_app_elf_sha256[i] = src[i];
         }

components/app_update/esp_ota_ops.c

@@ -41,6 +41,12 @@
 #include "esp_system.h"
 #include "esp_efuse.h"
 
+#ifdef CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/crc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/crc.h"
+#include "esp32s2/rom/secure_boot.h"
+#endif
 
 #define SUB_TYPE_ID(i) (i & 0x0F)
 
@@ -250,6 +256,43 @@ esp_err_t esp_ota_write(esp_ota_handle_t handle, const void *data, size_t size)
     return ESP_ERR_INVALID_ARG;
 }
 
+esp_err_t esp_ota_write_with_offset(esp_ota_handle_t handle, const void *data, size_t size, uint32_t offset)
+{
+    const uint8_t *data_bytes = (const uint8_t *)data;
+    esp_err_t ret;
+    ota_ops_entry_t *it;
+
+    if (data == NULL) {
+        ESP_LOGE(TAG, "write data is invalid");
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    // find ota handle in linked list
+    for (it = LIST_FIRST(&s_ota_ops_entries_head); it != NULL; it = LIST_NEXT(it, entries)) {
+        if (it->handle == handle) {
+            // must erase the partition before writing to it
+            assert(it->erased_size > 0 && "must erase the partition before writing to it");
+
+            /* esp_ota_write_with_offset is used to write data in non contiguous manner.
+             * Hence, unaligned data(less than 16 bytes) cannot be cached if flash encryption is enabled.
+             */
+            if (esp_flash_encryption_enabled() && (size % 16)) {
+                ESP_LOGE(TAG, "Size should be 16byte aligned for flash encryption case");
+                return ESP_ERR_INVALID_ARG;
+            }
+            ret = esp_partition_write(it->part, offset, data_bytes, size);
+            if (ret == ESP_OK) {
+                it->wrote_size += size;
+            }
+            return ret;
+        }
+    }
+
+    // OTA handle is not found in linked list
+    ESP_LOGE(TAG,"OTA handle not found");
+    return ESP_ERR_INVALID_ARG;
+}
+
 esp_err_t esp_ota_end(esp_ota_handle_t handle)
 {
     ota_ops_entry_t *it;
@@ -688,12 +731,12 @@ static esp_err_t esp_ota_current_ota_is_workable(bool valid)
     return ESP_OK;
 }
 
-esp_err_t esp_ota_mark_app_valid_cancel_rollback()
+esp_err_t esp_ota_mark_app_valid_cancel_rollback(void)
 {
     return esp_ota_current_ota_is_workable(true);
 }
 
-esp_err_t esp_ota_mark_app_invalid_rollback_and_reboot()
+esp_err_t esp_ota_mark_app_invalid_rollback_and_reboot(void)
 {
     return esp_ota_current_ota_is_workable(false);
 }
@@ -716,7 +759,7 @@ static int get_last_invalid_otadata(const esp_ota_select_entry_t *two_otadata)
     return num_invalid_otadata;
 }
 
-const esp_partition_t* esp_ota_get_last_invalid_partition()
+const esp_partition_t* esp_ota_get_last_invalid_partition(void)
 {
     esp_ota_select_entry_t otadata[2];
     if (read_otadata(otadata) == NULL) {
@@ -821,3 +864,24 @@ esp_err_t esp_ota_erase_last_boot_app_partition(void)
 
     return ESP_OK;
 }
+
+#if CONFIG_IDF_TARGET_ESP32S2 && CONFIG_SECURE_BOOT_V2_ENABLED
+esp_err_t esp_ota_revoke_secure_boot_public_key(esp_ota_secure_boot_public_key_index_t index) {
+
+    if (!esp_secure_boot_enabled()) {
+        ESP_LOGE(TAG, "Secure boot v2 has not been enabled.");
+        return ESP_FAIL;
+    }
+
+    if (index != SECURE_BOOT_PUBLIC_KEY_INDEX_0 &&
+         index != SECURE_BOOT_PUBLIC_KEY_INDEX_1 &&
+         index != SECURE_BOOT_PUBLIC_KEY_INDEX_2) {
+        ESP_LOGE(TAG, "Invalid Index found for public key revocation %d.", index);
+        return ESP_ERR_INVALID_ARG;
+    }
+
+    ets_secure_boot_revoke_public_key_digest(index);
+    ESP_LOGI(TAG, "Revoked signature block %d.", index);
+    return ESP_OK;
+}
+#endif

components/app_update/include/esp_ota_ops.h

@@ -49,7 +49,7 @@ typedef uint32_t esp_ota_handle_t;
 
 /**
  * @brief   Return esp_app_desc structure. This structure includes app version.
- * 
+ *
  * Return description for running app.
  * @return Pointer to esp_app_desc structure.
  */
@@ -117,6 +117,29 @@ esp_err_t esp_ota_begin(const esp_partition_t* partition, size_t image_size, esp
  */
 esp_err_t esp_ota_write(esp_ota_handle_t handle, const void* data, size_t size);
 
+/**
+ * @brief   Write OTA update data to partition
+ *
+ * This function can write data in non contiguous manner.
+ * If flash encryption is enabled, data should be 16 byte aligned.
+ *
+ * @param handle  Handle obtained from esp_ota_begin
+ * @param data    Data buffer to write
+ * @param size    Size of data buffer in bytes
+ * @param offset  Offset in flash partition
+ *
+ * @note While performing OTA, if the packets arrive out of order, esp_ota_write_with_offset() can be used to write data in non contiguous manner.
+ *       Use of esp_ota_write_with_offset() in combination with esp_ota_write() is not recommended.
+ *
+ * @return
+ *    - ESP_OK: Data was written to flash successfully.
+ *    - ESP_ERR_INVALID_ARG: handle is invalid.
+ *    - ESP_ERR_OTA_VALIDATE_FAILED: First byte of image contains invalid app image magic byte.
+ *    - ESP_ERR_FLASH_OP_TIMEOUT or ESP_ERR_FLASH_OP_FAIL: Flash write failed.
+ *    - ESP_ERR_OTA_SELECT_INFO_INVALID: OTA data partition has invalid contents
+ */
+esp_err_t esp_ota_write_with_offset(esp_ota_handle_t handle, const void *data, size_t size, uint32_t offset);
+
 /**
  * @brief Finish OTA update and validate newly written app image.
  *
@@ -201,7 +224,7 @@ const esp_partition_t* esp_ota_get_next_update_partition(const esp_partition_t *
 
 /**
  * @brief Returns esp_app_desc structure for app partition. This structure includes app version.
- * 
+ *
  * Returns a description for the requested app partition.
  * @param[in] partition     Pointer to app partition. (only app partition)
  * @param[out] app_desc     Structure of info about app.
@@ -221,7 +244,7 @@ esp_err_t esp_ota_get_partition_description(const esp_partition_t *partition, es
  * @return
  *  - ESP_OK: if successful.
  */
-esp_err_t esp_ota_mark_app_valid_cancel_rollback();
+esp_err_t esp_ota_mark_app_valid_cancel_rollback(void);
 
 /**
  * @brief This function is called to roll back to the previously workable app with reboot.
@@ -233,14 +256,14 @@ esp_err_t esp_ota_mark_app_valid_cancel_rollback();
  *  - ESP_FAIL: if not successful.
  *  - ESP_ERR_OTA_ROLLBACK_FAILED: The rollback is not possible due to flash does not have any apps.
  */
-esp_err_t esp_ota_mark_app_invalid_rollback_and_reboot();
+esp_err_t esp_ota_mark_app_invalid_rollback_and_reboot(void);
 
 /**
  * @brief Returns last partition with invalid state (ESP_OTA_IMG_INVALID or ESP_OTA_IMG_ABORTED).
  *
  * @return partition.
  */
-const esp_partition_t* esp_ota_get_last_invalid_partition();
+const esp_partition_t* esp_ota_get_last_invalid_partition(void);
 
 /**
  * @brief Returns state for given partition.
@@ -276,6 +299,34 @@ esp_err_t esp_ota_erase_last_boot_app_partition(void);
  */
 bool esp_ota_check_rollback_is_possible(void);
 
+#if CONFIG_IDF_TARGET_ESP32S2 && (CONFIG_SECURE_BOOT_V2_ENABLED || __DOXYGEN__)
+
+/**
+ * Secure Boot V2 public key indexes.
+ */
+typedef enum {
+    SECURE_BOOT_PUBLIC_KEY_INDEX_0,     /*!< Points to the 0th index of the Secure Boot v2 public key */
+    SECURE_BOOT_PUBLIC_KEY_INDEX_1,     /*!< Points to the 1st index of the Secure Boot v2 public key */
+    SECURE_BOOT_PUBLIC_KEY_INDEX_2      /*!< Points to the 2nd index of the Secure Boot v2 public key */
+} esp_ota_secure_boot_public_key_index_t;
+
+/**
+ * @brief Revokes the old signature digest. To be called in the application after the rollback logic.
+ *
+ * Relevant for Secure boot v2 on ESP32-S2 where upto 3 key digests can be stored (Key N-1, Key N, Key N+1).
+ * When key N-1 used to sign an app is invalidated, an OTA update is to be sent with an app signed with key N-1 & Key N.
+ * After successfully booting the OTA app should call this function to revoke Key N-1.
+ *
+ * @param index - The index of the signature block to be revoked
+ *
+ * @return
+ *        - ESP_OK: If revocation is successful.
+ *        - ESP_ERR_INVALID_ARG: If the index of the public key to be revoked is incorrect.
+ *        - ESP_FAIL: If secure boot v2 has not been enabled.
+ */
+esp_err_t esp_ota_revoke_secure_boot_public_key(esp_ota_secure_boot_public_key_index_t index);
+#endif /* CONFIG_IDF_TARGET_ESP32S2 */
+
 #ifdef __cplusplus
 }
 #endif

components/app_update/otatool.py

@@ -87,9 +87,8 @@ class OtatoolTarget():
             seq = bytearray(self.otadata[start:start + 4])
             crc = bytearray(self.otadata[start + 28:start + 32])
 
-            seq = struct.unpack('>I', seq)
-            crc = struct.unpack('>I', crc)
-
+            seq = struct.unpack('I', seq)
+            crc = struct.unpack('I', crc)
             info.append(otadata_info(seq[0], crc[0]))
 
         return info
@@ -103,12 +102,11 @@ class OtatoolTarget():
     def switch_ota_partition(self, ota_id):
         self._check_otadata_partition()
 
-        sys.path.append(PARTTOOL_DIR)
         import gen_esp32part as gen
 
         def is_otadata_info_valid(status):
             seq = status.seq % (1 << 32)
-            crc = hex(binascii.crc32(struct.pack("I", seq), 0xFFFFFFFF) % (1 << 32))
+            crc = binascii.crc32(struct.pack('I', seq), 0xFFFFFFFF) % (1 << 32)
             return seq < (int('0xFFFFFFFF', 16) % (1 << 32)) and status.crc == crc
 
         partition_table = self.target.partition_table
@@ -219,8 +217,8 @@ def _read_otadata(target):
 
     otadata_info = target._get_otadata_info()
 
-    print("             {:8s} \t  {:8s} | \t  {:8s} \t   {:8s}".format("OTA_SEQ", "CRC", "OTA_SEQ", "CRC"))
-    print("Firmware:  0x{:8x} \t0x{:8x} | \t0x{:8x} \t 0x{:8x}".format(otadata_info[0].seq, otadata_info[0].crc,
+    print('             {:8s} \t  {:8s} | \t  {:8s} \t   {:8s}'.format('OTA_SEQ', 'CRC', 'OTA_SEQ', 'CRC'))
+    print('Firmware:  0x{:08x} \t0x{:08x} | \t0x{:08x} \t 0x{:08x}'.format(otadata_info[0].seq, otadata_info[0].crc,
           otadata_info[1].seq, otadata_info[1].crc))
 
 

components/app_update/test/CMakeLists.txt

@@ -1,3 +1,4 @@
 idf_component_register(SRC_DIRS "."
-                    INCLUDE_DIRS "."
-                    REQUIRES unity test_utils app_update bootloader_support nvs_flash)
+                       PRIV_INCLUDE_DIRS "."
+                       PRIV_REQUIRES unity test_utils app_update bootloader_support nvs_flash
+                      )

components/app_update/test/test_ota_ops.c

@@ -58,7 +58,7 @@ TEST_CASE("esp_ota_get_next_update_partition logic", "[ota]")
     TEST_ASSERT_NOT_NULL(ota_1);
     TEST_ASSERT_NULL(ota_2); /* this partition shouldn't exist in test partition table */
 
-    TEST_ASSERT_EQUAL_PTR(factory, running); /* this may not be true if/when we get OTA tests that do OTA updates */ 
+    TEST_ASSERT_EQUAL_PTR(factory, running); /* this may not be true if/when we get OTA tests that do OTA updates */
 
     /* (The test steps verify subtypes before verifying pointer equality, because the failure messages are more readable
        this way.)
@@ -84,7 +84,7 @@ TEST_CASE("esp_ota_get_next_update_partition logic", "[ota]")
     TEST_ASSERT_EQUAL_PTR(ota_0, p);
 }
 
-TEST_CASE("esp_ota_get_partition_description ", "[ota]")
+TEST_CASE("esp_ota_get_partition_description", "[ota]")
 {
     const esp_partition_t *running = esp_ota_get_running_partition();
     TEST_ASSERT_NOT_NULL(running);

components/app_update/test/test_switch_ota.c

@@ -7,9 +7,13 @@
 #include "string.h"
 #include "sdkconfig.h"
 
+#if CONFIG_IDF_TARGET_ESP32
 #include "esp32/rom/spi_flash.h"
 #include "esp32/rom/rtc.h"
-#include "esp32/rom/ets_sys.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"
+#include "esp32s2/rom/rtc.h"
+#endif
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
@@ -19,7 +23,7 @@
 #include "unity.h"
 
 #include "bootloader_common.h"
-#include "../include_bootloader/bootloader_flash.h"
+#include "../include_bootloader/bootloader_flash_priv.h"
 
 #include "esp_log.h"
 #include "esp_ota_ops.h"
@@ -44,9 +48,34 @@ static void copy_app_partition(esp_ota_handle_t update_handle, const esp_partiti
 {
     const void *partition_bin = NULL;
     spi_flash_mmap_handle_t  data_map;
+    ESP_LOGI(TAG, "start the copy process");
     TEST_ESP_OK(esp_partition_mmap(curr_app, 0, curr_app->size, SPI_FLASH_MMAP_DATA, &partition_bin, &data_map));
     TEST_ESP_OK(esp_ota_write(update_handle, (const void *)partition_bin, curr_app->size));
     spi_flash_munmap(data_map);
+    ESP_LOGI(TAG, "finish the copy process");
+}
+
+/* @brief Copies a current app to next partition using handle.
+ *
+ * @param[in] update_handle - Handle of API ota.
+ * @param[in] cur_app - Current app.
+ */
+static void copy_app_partition_with_offset(esp_ota_handle_t update_handle, const esp_partition_t *curr_app)
+{
+    const void *partition_bin = NULL;
+    spi_flash_mmap_handle_t  data_map;
+    ESP_LOGI(TAG, "start the copy process");
+    uint32_t offset = 0, bytes_to_write = curr_app->size;
+    uint32_t write_bytes;
+    while (bytes_to_write > 0) {
+        write_bytes = (bytes_to_write > (4 * 1024)) ? (4 * 1024) : bytes_to_write;
+        TEST_ESP_OK(esp_partition_mmap(curr_app, offset, write_bytes, SPI_FLASH_MMAP_DATA, &partition_bin, &data_map));
+        TEST_ESP_OK(esp_ota_write_with_offset(update_handle, (const void *)partition_bin, write_bytes, offset));
+        spi_flash_munmap(data_map);
+        bytes_to_write -= write_bytes;
+        offset += write_bytes;
+    }
+    ESP_LOGI(TAG, "finish the copy process");
 }
 
 #if defined(CONFIG_BOOTLOADER_FACTORY_RESET) || defined(CONFIG_BOOTLOADER_APP_TEST)
@@ -99,6 +128,26 @@ static void copy_current_app_to_next_part(const esp_partition_t *cur_app_partiti
     TEST_ESP_OK(esp_ota_set_boot_partition(next_app_partition));
 }
 
+/* @brief Copies a current app to next partition (OTA0-15) and then configure OTA data for a new boot partition.
+ *
+ * @param[in] cur_app_partition - Current app.
+ * @param[in] next_app_partition - Next app for boot.
+ */
+static void copy_current_app_to_next_part_with_offset(const esp_partition_t *cur_app_partition, const esp_partition_t *next_app_partition)
+{
+    esp_ota_get_next_update_partition(NULL);
+    TEST_ASSERT_NOT_EQUAL(NULL, next_app_partition);
+    ESP_LOGI(TAG, "Writing to partition subtype %d at offset 0x%x", next_app_partition->subtype, next_app_partition->address);
+
+    esp_ota_handle_t update_handle = 0;
+    TEST_ESP_OK(esp_ota_begin(next_app_partition, OTA_SIZE_UNKNOWN, &update_handle));
+
+    copy_app_partition_with_offset(update_handle, cur_app_partition);
+
+    TEST_ESP_OK(esp_ota_end(update_handle));
+    TEST_ESP_OK(esp_ota_set_boot_partition(next_app_partition));
+}
+
 /* @brief Erase otadata partition
  */
 static void erase_ota_data(void)
@@ -112,19 +161,31 @@ static void erase_ota_data(void)
  */
 static void reboot_as_deep_sleep(void)
 {
+    ESP_LOGI(TAG, "reboot as deep sleep");
     esp_sleep_enable_timer_wakeup(2000);
     esp_deep_sleep_start();
 }
 
 /* @brief Copies a current app to next partition (OTA0-15), after that ESP is rebooting and run this (the next) OTAx.
  */
-static void copy_current_app_to_next_part_and_reboot()
+static void copy_current_app_to_next_part_and_reboot(void)
 {
     const esp_partition_t *cur_app = esp_ota_get_running_partition();
+    ESP_LOGI(TAG, "copy current app to next part");
     copy_current_app_to_next_part(cur_app, get_next_update_partition());
     reboot_as_deep_sleep();
 }
 
+/* @brief Copies a current app to next partition (OTA0-15) using esp_ota_write_with_offest(), after that ESP is rebooting and run this (the next) OTAx.
+ */
+static void copy_current_app_to_next_part_with_offset_and_reboot(void)
+{
+    const esp_partition_t *cur_app = esp_ota_get_running_partition();
+    ESP_LOGI(TAG, "copy current app to next part");
+    copy_current_app_to_next_part_with_offset(cur_app, get_next_update_partition());
+    reboot_as_deep_sleep();
+}
+
 /* @brief Get running app.
  *
  * @return The next partition of OTA(OTA0-15).
@@ -252,6 +313,7 @@ static void start_test(void)
     ESP_LOGI(TAG, "boot count 1 - reset");
     boot_count = 1;
     erase_ota_data();
+    ESP_LOGI(TAG, "ota_data erased");
     reboot_as_deep_sleep();
 }
 
@@ -264,19 +326,19 @@ static void test_flow1(void)
         case 2:
             ESP_LOGI(TAG, "Factory");
             TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_FACTORY, cur_app->subtype);
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 3:
             ESP_LOGI(TAG, "OTA0");
             TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_OTA_0, cur_app->subtype);
             mark_app_valid();
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 4:
             ESP_LOGI(TAG, "OTA1");
             TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_OTA_1, cur_app->subtype);
             mark_app_valid();
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 5:
             ESP_LOGI(TAG, "OTA0");
@@ -307,7 +369,7 @@ static void test_flow2(void)
         case 2:
             ESP_LOGI(TAG, "Factory");
             TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_FACTORY, cur_app->subtype);
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 3:
             ESP_LOGI(TAG, "OTA0");
@@ -344,13 +406,13 @@ static void test_flow3(void)
         case 2:
             ESP_LOGI(TAG, "Factory");
             TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_FACTORY, cur_app->subtype);
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 3:
             ESP_LOGI(TAG, "OTA0");
             TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_OTA_0, cur_app->subtype);
             mark_app_valid();
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 4:
             ESP_LOGI(TAG, "OTA1");
@@ -402,7 +464,7 @@ static void test_flow4(void)
             nvs_close(handle);
             nvs_flash_deinit();
 
-            copy_current_app_to_next_part_and_reboot(cur_app);
+            copy_current_app_to_next_part_and_reboot();
             break;
         case 3:
             ESP_LOGI(TAG, "OTA0");
@@ -731,3 +793,32 @@ static void test_erase_last_app_rollback(void)
 // 4 Stage: run OTA1           -> check it -> erase OTA0 and rollback                          -> reboot
 // 5 Stage: run factory        -> check it -> erase OTA_DATA for next tests                    -> PASS
 TEST_CASE_MULTIPLE_STAGES("Test erase_last_boot_app_partition. factory, OTA1, OTA0, factory", "[app_update][timeout=90][reset=DEEPSLEEP_RESET, DEEPSLEEP_RESET, DEEPSLEEP_RESET, SW_CPU_RESET]", start_test, test_erase_last_app_flow, test_erase_last_app_flow, test_erase_last_app_flow, test_erase_last_app_rollback);
+
+static void test_flow6(void)
+{
+    boot_count++;
+    ESP_LOGI(TAG, "boot count %d", boot_count);
+    const esp_partition_t *cur_app = get_running_firmware();
+    switch (boot_count) {
+        case 2:
+            ESP_LOGI(TAG, "Factory");
+            TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_FACTORY, cur_app->subtype);
+            copy_current_app_to_next_part_with_offset_and_reboot();
+            break;
+        case 3:
+            ESP_LOGI(TAG, "OTA0");
+            TEST_ASSERT_EQUAL(ESP_PARTITION_SUBTYPE_APP_OTA_0, cur_app->subtype);
+            mark_app_valid();
+            erase_ota_data();
+            break;
+        default:
+            erase_ota_data();
+            TEST_FAIL_MESSAGE("Unexpected stage");
+            break;
+    }
+}
+
+// 1 Stage: After POWER_RESET erase OTA_DATA for this test              -> reboot through deep sleep.
+// 2 Stage: run factory -> check it -> copy factory to OTA0             -> reboot  --//--
+// 3 Stage: run OTA0    -> check it -> erase OTA_DATA for next tests    -> PASS
+TEST_CASE_MULTIPLE_STAGES("Switching between factory, OTA0 using esp_ota_write_with_offset", "[app_update][timeout=90][reset=DEEPSLEEP_RESET, DEEPSLEEP_RESET]", start_test, test_flow6, test_flow6);

components/asio/port/include/esp_asio_config.h

@@ -22,8 +22,12 @@
 #  define ASIO_NO_EXCEPTIONS
 # endif   // CONFIG_COMPILER_CXX_EXCEPTIONS
 
+# ifndef CONFIG_COMPILER_RTTI
+#  define ASIO_NO_TYPEID
+# endif   // CONFIG_COMPILER_RTTI
+
 //
-// LWIP compatifility inet and address macros/functions
+// LWIP compatibility inet and address macros/functions
 //
 # define LWIP_COMPAT_SOCKET_INET 1
 # define LWIP_COMPAT_SOCKET_ADDR 1
@@ -34,12 +38,6 @@
 # define ASIO_DISABLE_SERIAL_PORT
 # define ASIO_SEPARATE_COMPILATION
 # define ASIO_STANDALONE
-# define ASIO_NO_TYPEID
-# define ASIO_DISABLE_SIGNAL
 # define ASIO_HAS_PTHREADS
-# define ASIO_DISABLE_EPOLL
-# define ASIO_DISABLE_EVENTFD
-# define ASIO_DISABLE_SIGNAL
-# define ASIO_DISABLE_SIGACTION
 
 #endif // _ESP_ASIO_CONFIG_H_

components/bootloader/CMakeLists.txt

@@ -1,21 +1,21 @@
 idf_component_register(PRIV_REQUIRES partition_table)
 
 # Do not generate flash file when building bootloader or is in early expansion of the build
-if(BOOTLOADER_BUILD)
+if(BOOTLOADER_BUILD OR NOT CONFIG_APP_BUILD_BOOTLOADER)
     return()
 endif()
 
+add_dependencies(bootloader partition_table_bin)
+
 # When secure boot is enabled, do not flash bootloader along with invocation of `idf.py flash`
-if(NOT CONFIG_SECURE_BOOT_ENABLED)
+if(NOT CONFIG_SECURE_BOOT)
     set(flash_bootloader FLASH_IN_PROJECT)
 endif()
 
-# Set values used in flash_bootloader_args.in and generate flash file
-# for bootloader
-esptool_py_flash_project_args(bootloader 0x1000
-                            ${BOOTLOADER_BUILD_DIR}/bootloader.bin
-                            ${flash_bootloader}
-                            FLASH_FILE_TEMPLATE flash_bootloader_args.in)
-
 esptool_py_custom_target(bootloader-flash bootloader "bootloader")
-add_dependencies(bootloader partition_table)
+esptool_py_flash_target_image(bootloader-flash bootloader "0x1000" "${BOOTLOADER_BUILD_DIR}/bootloader.bin")
+
+# Also attach an image to the project flash target
+if(NOT CONFIG_SECURE_BOOT)
+    esptool_py_flash_target_image(flash bootloader "0x1000" "${BOOTLOADER_BUILD_DIR}/bootloader.bin")
+endif()

components/bootloader/Kconfig.projbuild

@@ -1,4 +1,29 @@
 menu "Bootloader config"
+
+    choice BOOTLOADER_COMPILER_OPTIMIZATION
+        prompt "Bootloader optimization Level"
+        default BOOTLOADER_COMPILER_OPTIMIZATION_SIZE
+        help
+            This option sets compiler optimization level (gcc -O argument)
+            for the bootloader.
+
+            - The default "Size" setting will add the -0s flag to CFLAGS.
+            - The "Debug" setting will add the -Og flag to CFLAGS.
+            - The "Performance" setting will add the -O2 flag to CFLAGS.
+            - The "None" setting will add the -O0 flag to CFLAGS.
+
+            Note that custom optimization levels may be unsupported.
+
+        config BOOTLOADER_COMPILER_OPTIMIZATION_SIZE
+            bool "Size (-Os)"
+        config BOOTLOADER_COMPILER_OPTIMIZATION_DEBUG
+            bool "Debug (-Og)"
+        config BOOTLOADER_COMPILER_OPTIMIZATION_PERF
+            bool "Optimize for performance (-O2)"
+        config BOOTLOADER_COMPILER_OPTIMIZATION_NONE
+            bool "Debug without optimization (-O0)"
+    endchoice
+
     choice BOOTLOADER_LOG_LEVEL
         bool "Bootloader log verbosity"
         default BOOTLOADER_LOG_LEVEL_INFO
@@ -28,20 +53,34 @@ menu "Bootloader config"
         default 4 if BOOTLOADER_LOG_LEVEL_DEBUG
         default 5 if BOOTLOADER_LOG_LEVEL_VERBOSE
 
+    config BOOTLOADER_SPI_CUSTOM_WP_PIN
+        bool "Use custom SPI Flash WP Pin when flash pins set in eFuse (read help)"
+        depends on IDF_TARGET_ESP32 && (ESPTOOLPY_FLASHMODE_QIO || ESPTOOLPY_FLASHMODE_QOUT)
+        default y if BOOTLOADER_SPI_WP_PIN != 7  # backwards compatibility, can remove in IDF 5
+        default n
+        help
+            This setting is only used if the SPI flash pins have been overridden by setting the eFuses
+            SPI_PAD_CONFIG_xxx, and the SPI flash mode is QIO or QOUT.
+
+            When this is the case, the eFuse config only defines 3 of the 4 Quad I/O data pins. The WP pin (aka
+            ESP32 pin "SD_DATA_3" or SPI flash pin "IO2") is not specified in eFuse. The same pin is also used
+            for external SPIRAM if it is enabled.
+
+            If this config item is set to N (default), the correct WP pin will be automatically used for any
+            Espressif chip or module with integrated flash. If a custom setting is needed, set this config item to
+            Y and specify the GPIO number connected to the WP.
+
     config BOOTLOADER_SPI_WP_PIN
-        int "SPI Flash WP Pin when customising pins via eFuse (read help)"
+        int "Custom SPI Flash WP Pin"
         range 0 33
         default 7
-        depends on ESPTOOLPY_FLASHMODE_QIO || ESPTOOLPY_FLASHMODE_QOUT
+        depends on IDF_TARGET_ESP32 && (ESPTOOLPY_FLASHMODE_QIO || ESPTOOLPY_FLASHMODE_QOUT)
+        #depends on BOOTLOADER_SPI_CUSTOM_WP_PIN  # backwards compatibility, can uncomment in IDF 5
         help
-            This value is ignored unless flash mode is set to QIO or QOUT *and* the SPI flash pins have been
-            overriden by setting the eFuses SPI_PAD_CONFIG_xxx.
+            The option "Use custom SPI Flash WP Pin" must be set or this value is ignored
 
-            When this is the case, the eFuse config only defines 3 of the 4 Quad I/O data pins. The WP pin (aka ESP32
-            pin "SD_DATA_3" or SPI flash pin "IO2") is not specified in eFuse. That pin number is compiled into the
-            bootloader instead.
-
-            The default value (GPIO 7) is correct for WP pin on ESP32-D2WD integrated flash.
+            If burning a customized set of SPI flash pins in eFuse and using QIO or QOUT mode for flash, set this
+            value to the GPIO number of the SPI flash WP pin.
 
     choice BOOTLOADER_VDDSDIO_BOOST
         bool "VDDSDIO LDO voltage"
@@ -75,7 +114,8 @@ menu "Bootloader config"
     config BOOTLOADER_NUM_PIN_FACTORY_RESET
         int "Number of the GPIO input for factory reset"
         depends on BOOTLOADER_FACTORY_RESET
-        range 0 39
+        range 0 39 if IDF_TARGET_ESP32
+        range 0 44 if IDF_TARGET_ESP32S2
         default 4
         help
             The selected GPIO will be configured as an input with internal pull-up enabled.
@@ -204,10 +244,13 @@ menu "Bootloader config"
     config BOOTLOADER_APP_SEC_VER_SIZE_EFUSE_FIELD
         int "Size of the efuse secure version field"
         depends on BOOTLOADER_APP_ANTI_ROLLBACK
-        range 1 32
-        default 32
+        range 1 32 if IDF_TARGET_ESP32
+        default 32 if IDF_TARGET_ESP32
+        range 1 16 if IDF_TARGET_ESP32S2
+        default 16 if IDF_TARGET_ESP32S2
         help
-            The size of the efuse secure version field. Its length is limited to 32 bits.
+            The size of the efuse secure version field.
+            Its length is limited to 32 bits for ESP32 and 16 bits for ESP32-S2.
             This determines how many times the security version can be increased.
 
     config BOOTLOADER_EFUSE_SECURE_VERSION_EMULATE
@@ -219,6 +262,53 @@ menu "Bootloader config"
             It allow to test anti-rollback implemention without permanent write eFuse bits.
             In partition table should be exist this partition `emul_efuse, data, 5, , 0x2000`.
 
+    config BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP
+        bool "Skip image validation when exiting deep sleep"
+        depends on (SECURE_BOOT && SECURE_BOOT_INSECURE) || !SECURE_BOOT
+        default n
+        help
+            This option disables the normal validation of an image coming out of
+            deep sleep (checksums, SHA256, and signature). This is a trade-off
+            between wakeup performance from deep sleep, and image integrity checks.
+
+            Only enable this if you know what you are doing. It should not be used
+            in conjunction with using deep_sleep() entry and changing the active OTA
+            partition as this would skip the validation upon first load of the new
+            OTA partition.
+
+    config BOOTLOADER_RESERVE_RTC_SIZE
+        hex
+        default 0x10 if BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP || BOOTLOADER_CUSTOM_RESERVE_RTC
+        default 0
+        help
+            Reserve RTC FAST memory for Skip image validation. This option in bytes.
+            This option reserves an area in the RTC FAST memory (access only PRO_CPU).
+            Used to save the addresses of the selected application.
+            When a wakeup occurs (from Deep sleep), the bootloader retrieves it and
+            loads the application without validation.
+
+    config BOOTLOADER_CUSTOM_RESERVE_RTC
+        bool "Reserve RTC FAST memory for custom purposes"
+        default n
+        help
+            This option allows the customer to place data in the RTC FAST memory,
+            this area remains valid when rebooted, except for power loss.
+            This memory is located at a fixed address and is available
+            for both the bootloader and the application.
+            (The application and bootoloader must be compiled with the same option).
+            The RTC FAST memory has access only through PRO_CPU.
+
+    config BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE
+        hex "Size in bytes for custom purposes"
+        range 0 0x10
+        default 0
+        depends on BOOTLOADER_CUSTOM_RESERVE_RTC
+        help
+            This option reserves in RTC FAST memory the area for custom purposes.
+            If you want to create your own bootloader and save more information
+            in this area of memory, you can increase it. It must be a multiple of 4 bytes.
+            This area (rtc_retain_mem_t) is reserved and has access from the bootloader and an application.
+
     config BOOTLOADER_FLASH_XMC_SUPPORT
         bool "Enable the support for flash chips of XMC (READ HELP FIRST)"
         default y
@@ -238,12 +328,12 @@ menu "Security features"
     config SECURE_SIGNED_ON_BOOT
         bool
         default y
-        depends on SECURE_BOOT_ENABLED || SECURE_SIGNED_ON_BOOT_NO_SECURE_BOOT
+        depends on SECURE_BOOT || SECURE_SIGNED_ON_BOOT_NO_SECURE_BOOT
 
     config SECURE_SIGNED_ON_UPDATE
         bool
         default y
-        depends on SECURE_BOOT_ENABLED || SECURE_SIGNED_ON_UPDATE_NO_SECURE_BOOT
+        depends on SECURE_BOOT || SECURE_SIGNED_ON_UPDATE_NO_SECURE_BOOT
 
     config SECURE_SIGNED_APPS
         bool
@@ -254,11 +344,20 @@ menu "Security features"
         select MBEDTLS_ECDSA_C
         depends on SECURE_SIGNED_ON_BOOT || SECURE_SIGNED_ON_UPDATE
 
+    config SECURE_BOOT_SUPPORTS_RSA
+        bool
+        default y
+        depends on ESP32_REV_MIN_3 || IDF_TARGET_ESP32S2
+
+    config SECURE_TARGET_HAS_SECURE_ROM_DL_MODE
+        bool
+        default y
+        depends on IDF_TARGET_ESP32S2
+
 
     config SECURE_SIGNED_APPS_NO_SECURE_BOOT
         bool "Require signed app images"
-        default n
-        depends on !SECURE_BOOT_ENABLED
+        depends on !SECURE_BOOT
         help
             Require apps to be signed to verify their integrity.
 
@@ -267,6 +366,35 @@ menu "Security features"
             against remote network access, but not physical access. Compared to using hardware Secure Boot this option
             is much simpler to implement.
 
+    choice SECURE_SIGNED_APPS_SCHEME
+        bool "App Signing Scheme"
+        depends on SECURE_BOOT || SECURE_SIGNED_APPS_NO_SECURE_BOOT
+        default SECURE_SIGNED_APPS_ECDSA_SCHEME if SECURE_BOOT_V1_ENABLED
+        default SECURE_SIGNED_APPS_RSA_SCHEME if SECURE_BOOT_V2_ENABLED
+        help
+            Select the Secure App signing scheme. Depends on the Chip Revision.
+            There are two options:
+            1. ECDSA based secure boot scheme. (Only choice for Secure Boot V1)
+            Supported in ESP32 and ESP32-ECO3.
+            2. The RSA based secure boot scheme. (Only choice for Secure Boot V2)
+            Supported in ESP32-ECO3. (ESP32 Chip Revision 3 onwards)
+
+        config SECURE_SIGNED_APPS_ECDSA_SCHEME
+            bool "ECDSA"
+            depends on IDF_TARGET_ESP32 && (SECURE_SIGNED_APPS_NO_SECURE_BOOT || SECURE_BOOT_V1_ENABLED)
+            help
+                Embeds the ECDSA public key in the bootloader and signs the application with an ECDSA key.
+
+                Refer to the documentation before enabling.
+
+        config SECURE_SIGNED_APPS_RSA_SCHEME
+            bool "RSA"
+            depends on SECURE_BOOT_SUPPORTS_RSA && SECURE_BOOT_V2_ENABLED
+            help
+                Appends the RSA-3072 based Signature block to the application.
+                Refer to <Secure Boot Version 2 documentation link> before enabling.
+    endchoice
+
     config SECURE_SIGNED_ON_BOOT_NO_SECURE_BOOT
         bool "Bootloader verifies app signatures"
         default n
@@ -293,23 +421,50 @@ menu "Security features"
             If hardware secure boot is not enabled, this option still adds significant security against network-based
             attackers by preventing spoofing of OTA updates.
 
-    config SECURE_BOOT_ENABLED
-        bool "Enable hardware secure boot in bootloader (READ DOCS FIRST)"
+    config SECURE_BOOT
+        bool "Enable hardware Secure Boot in bootloader (READ DOCS FIRST)"
         default n
         help
-            Build a bootloader which enables secure boot on first boot.
+            Build a bootloader which enables Secure Boot on first boot.
 
-            Once enabled, secure boot will not boot a modified bootloader. The bootloader will only load a partition
+            Once enabled, Secure Boot will not boot a modified bootloader. The bootloader will only load a partition
             table or boot an app if the data has a verified digital signature. There are implications for reflashing
             updated apps once secure boot is enabled.
 
             When enabling secure boot, JTAG and ROM BASIC Interpreter are permanently disabled by default.
 
-            Refer to https://docs.espressif.com/projects/esp-idf/en/latest/security/secure-boot.html before enabling.
+    choice SECURE_BOOT_VERSION
+        bool "Select secure boot version"
+        default SECURE_BOOT_V2_ENABLED if ESP32_REV_MIN_3
+        depends on SECURE_BOOT
+        help
+            Select the Secure Boot Version. Depends on the Chip Revision.
+            Secure Boot V2 is the new RSA based secure boot scheme.
+            Supported in ESP32-ECO3. (ESP32 Chip Revision 3 onwards)
+            Secure Boot V1 is the AES based secure boot scheme.
+            Supported in ESP32 and ESP32-ECO3.
+
+        config SECURE_BOOT_V1_ENABLED
+            bool "Enable Secure Boot version 1"
+            depends on IDF_TARGET_ESP32
+            help
+                Build a bootloader which enables secure boot version 1 on first boot.
+                Refer to the Secure Boot section of the ESP-IDF Programmer's Guide for this version before enabling.
+
+        config SECURE_BOOT_V2_ENABLED
+            bool "Enable Secure Boot version 2"
+            depends on SECURE_BOOT_SUPPORTS_RSA
+            select SECURE_ENABLE_SECURE_ROM_DL_MODE if !IDF_TARGET_ESP32 && !SECURE_INSECURE_ALLOW_DL_MODE && !SECURE_DISABLE_ROM_DL_MODE # NOERROR
+            select SECURE_DISABLE_ROM_DL_MODE if ESP32_REV_MIN_3 && !SECURE_INSECURE_ALLOW_DL_MODE
+            help
+                Build a bootloader which enables Secure Boot version 2 on first boot.
+                Refer to Secure Boot V2 section of the ESP-IDF Programmer's Guide for this version before enabling.
+
+    endchoice
 
     choice SECURE_BOOTLOADER_MODE
         bool "Secure bootloader mode"
-        depends on SECURE_BOOT_ENABLED
+        depends on SECURE_BOOT_V1_ENABLED
         default SECURE_BOOTLOADER_ONE_TIME_FLASH
 
         config SECURE_BOOTLOADER_ONE_TIME_FLASH
@@ -344,7 +499,8 @@ menu "Security features"
             If enabled (default), these binary files are signed as part of the build process. The file named in
             "Secure boot private signing key" will be used to sign the image.
 
-            If disabled, unsigned app/partition data will be built. They must be signed manually using espsecure.py
+            If disabled, unsigned app/partition data will be built. They must be signed manually using espsecure.py.
+            Version 1 to enable ECDSA Based Secure Boot and Version 2 to enable RSA based Secure Boot.
             (for example, on a remote signing server.)
 
     config SECURE_BOOT_SIGNING_KEY
@@ -354,28 +510,32 @@ menu "Security features"
         help
             Path to the key file used to sign app images.
 
-            Key file is an ECDSA private key (NIST256p curve) in PEM format.
+            Key file is an ECDSA private key (NIST256p curve) in PEM format for Secure Boot V1.
+            Key file is an RSA private key in PEM format for Secure Boot V2.
 
             Path is evaluated relative to the project directory.
 
             You can generate a new signing key by running the following command:
             espsecure.py generate_signing_key secure_boot_signing_key.pem
 
-            See https://docs.espressif.com/projects/esp-idf/en/latest/security/secure-boot.html for details.
+            See the Secure Boot section of the ESP-IDF Programmer's Guide for this version for details.
 
     config SECURE_BOOT_VERIFICATION_KEY
         string "Secure boot public signature verification key"
-        depends on SECURE_SIGNED_APPS && !SECURE_BOOT_BUILD_SIGNED_BINARIES
+        depends on SECURE_SIGNED_APPS && !SECURE_BOOT_BUILD_SIGNED_BINARIES && !SECURE_SIGNED_APPS_RSA_SCHEME
         default "signature_verification_key.bin"
         help
-            Path to a public key file used to verify signed images. This key is compiled into the bootloader and/or
+            Path to a public key file used to verify signed images.
+            Secure Boot V1: This ECDSA public key is compiled into the bootloader and/or
             app, to verify app images.
+            Secure Boot V2: This RSA public key is compiled into the signature block at
+            the end of the bootloader/app.
 
             Key file is in raw binary format, and can be extracted from a
             PEM formatted private key using the espsecure.py
             extract_public_key command.
 
-            Refer to https://docs.espressif.com/projects/esp-idf/en/latest/security/secure-boot.html before enabling.
+            Refer to the Secure Boot section of the ESP-IDF Programmer's Guide for this version before enabling.
 
     choice SECURE_BOOTLOADER_KEY_ENCODING
         bool "Hardware Key Encoding"
@@ -402,7 +562,7 @@ menu "Security features"
 
     config SECURE_BOOT_INSECURE
         bool "Allow potentially insecure options"
-        depends on SECURE_BOOT_ENABLED
+        depends on SECURE_BOOT
         default N
         help
             You can disable some of the default protections offered by secure boot, in order to enable testing or a
@@ -410,7 +570,7 @@ menu "Security features"
 
             Only enable these options if you are very sure.
 
-            Refer to https://docs.espressif.com/projects/esp-idf/en/latest/security/secure-boot.html before enabling.
+            Refer to the Secure Boot section of the ESP-IDF Programmer's Guide for this version before enabling.
 
     config SECURE_FLASH_ENC_ENABLED
         bool "Enable flash encryption on boot (READ DOCS FIRST)"
@@ -425,6 +585,26 @@ menu "Security features"
             Read https://docs.espressif.com/projects/esp-idf/en/latest/security/flash-encryption.html
             before enabling.
 
+    choice SECURE_FLASH_ENCRYPTION_KEYSIZE
+        bool "Size of generated AES-XTS key"
+        default SECURE_FLASH_ENCRYPTION_AES128
+        depends on IDF_TARGET_ESP32S2 && SECURE_FLASH_ENC_ENABLED
+        help
+            Size of generated AES-XTS key.
+
+            AES-128 uses a 256-bit key (32 bytes) which occupies one Efuse key block.
+            AES-256 uses a 512-bit key (64 bytes) which occupies two Efuse key blocks.
+
+            This setting is ignored if either type of key is already burned to Efuse before the first boot.
+            In this case, the pre-burned key is used and no new key is generated.
+
+        config SECURE_FLASH_ENCRYPTION_AES128
+            bool "AES-128 (256-bit key)"
+
+        config SECURE_FLASH_ENCRYPTION_AES256
+            bool "AES-256 (512-bit key)"
+    endchoice
+
     choice SECURE_FLASH_ENCRYPTION_MODE
         bool "Enable usage mode"
         depends on SECURE_FLASH_ENC_ENABLED
@@ -435,7 +615,7 @@ menu "Security features"
             Select Release mode only for production or manufacturing. Once enabled you can not reflash using UART
             bootloader
 
-            Refer to https://docs.espressif.com/projects/esp-idf/en/latest/security/secure-boot.html and
+            Refer to the Secure Boot section of the ESP-IDF Programmer's Guide for this version and
             https://docs.espressif.com/projects/esp-idf/en/latest/security/flash-encryption.html for details.
 
         config SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT
@@ -444,6 +624,7 @@ menu "Security features"
 
         config SECURE_FLASH_ENCRYPTION_MODE_RELEASE
             bool "Release"
+            select SECURE_ENABLE_SECURE_ROM_DL_MODE if SECURE_TARGET_HAS_SECURE_ROM_DL_MODE && !SECURE_DISABLE_ROM_DL_MODE # NOERROR
             select PARTITION_TABLE_MD5 if !ESP32_COMPATIBLE_PRE_V3_1_BOOTLOADERS
 
     endchoice
@@ -459,7 +640,7 @@ menu "Security features"
 
         config SECURE_BOOT_ALLOW_ROM_BASIC
             bool "Leave ROM BASIC Interpreter available on reset"
-            depends on SECURE_BOOT_INSECURE || SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT
+            depends on (SECURE_BOOT_INSECURE || SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT) && IDF_TARGET_ESP32
             default N
             help
                 By default, the BASIC ROM Console starts on reset if no valid bootloader is
@@ -498,6 +679,39 @@ menu "Security features"
                 image to this length. It is generally not recommended to set this option, unless you have a legacy
                 partitioning scheme which doesn't support 64KB aligned partition lengths.
 
+        config SECURE_BOOT_V2_ALLOW_EFUSE_RD_DIS
+            bool "Allow additional read protecting of efuses"
+            depends on SECURE_BOOT_INSECURE && SECURE_BOOT_V2_ENABLED
+            help
+                If not set (default, recommended), on first boot the bootloader will burn the WR_DIS_RD_DIS
+                efuse when Secure Boot is enabled. This prevents any more efuses from being read protected.
+
+                If this option is set, it will remain possible to write the EFUSE_RD_DIS efuse field after Secure
+                Boot is enabled. This may allow an attacker to read-protect the BLK2 efuse (for ESP32) and
+                BLOCK4-BLOCK10 (i.e. BLOCK_KEY0-BLOCK_KEY5)(for other chips) holding the public key digest, causing an
+                immediate denial of service and possibly allowing an additional fault injection attack to
+                bypass the signature protection.
+
+                NOTE: Once a BLOCK is read-protected, the application will read all zeros from that block
+
+                NOTE: If "UART ROM download mode (Permanently disabled (recommended))" or
+                "UART ROM download mode (Permanently switch to Secure mode (recommended))" is set,
+                then it is __NOT__ possible to read/write efuses using espefuse.py utility.
+                However, efuse can be read/written from the application
+
+        config SECURE_INSECURE_ALLOW_DL_MODE
+            bool "Don't automatically restrict UART download mode"
+            depends on SECURE_BOOT_INSECURE && SECURE_BOOT_V2_ENABLED
+            default N
+            help
+                By default, enabling either flash encryption in release mode or secure boot will automatically
+                disable UART download mode on ESP32 ECO3, or enable secure download mode on newer chips.
+                This is recommended to reduce the attack surface of the chip.
+
+                To allow the full UART download mode to stay enabled, enable this option and ensure
+                the options SECURE_DISABLE_ROM_DL_MODE and SECURE_ENABLE_SECURE_ROM_DL_MODE are disabled as applicable.
+                This is not recommended.
+
         config SECURE_FLASH_UART_BOOTLOADER_ALLOW_ENC
             bool "Leave UART bootloader encryption enabled"
             depends on SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT
@@ -510,7 +724,7 @@ menu "Security features"
 
         config SECURE_FLASH_UART_BOOTLOADER_ALLOW_DEC
             bool "Leave UART bootloader decryption enabled"
-            depends on SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT
+            depends on SECURE_FLASH_ENCRYPTION_MODE_DEVELOPMENT && IDF_TARGET_ESP32
             default N
             help
                 If not set (default), the bootloader will permanently disable UART bootloader decryption access on
@@ -547,7 +761,7 @@ menu "Security features"
 
     config SECURE_DISABLE_ROM_DL_MODE
         bool "Permanently disable ROM Download Mode"
-        depends on ESP32_REV_MIN_3
+        depends on !IDF_TARGET_ESP32 || ESP32_REV_MIN_3
         default n
         help
             If set, during startup the app will burn an eFuse bit to permanently disable the UART ROM
@@ -562,5 +776,30 @@ menu "Security features"
             It is also possible to permanently disable Download Mode by calling
             esp_efuse_disable_rom_download_mode() at runtime.
 
+    config SECURE_ENABLE_SECURE_ROM_DL_MODE
+        bool "Permanently switch to ROM UART Secure Download mode"
+        depends on SECURE_TARGET_HAS_SECURE_ROM_DL_MODE && !SECURE_DISABLE_ROM_DL_MODE
+        help
+            If set, during startup the app will burn an eFuse bit to permanently switch the UART ROM
+            Download Mode into a separate Secure Download mode. This option can only work if
+            Download Mode is not already disabled by eFuse.
+
+            Secure Download mode limits the use of Download Mode functions to simple flash read,
+            write and erase operations, plus a command to return a summary of currently enabled
+            security features.
+
+            Secure Download mode is not compatible with the esptool.py flasher stub feature,
+            espefuse.py, read/writing memory or registers, encrypted download, or any other
+            features that interact with unsupported Download Mode commands.
+
+            Secure Download mode should be enabled in any application where Flash Encryption
+            and/or Secure Boot is enabled. Disabling this option does not immediately cancel
+            the benefits of the security features, but it increases the potential "attack
+            surface" for an attacker to try and bypass them with a successful physical attack.
+
+            It is also possible to enable secure download mode at runtime by calling
+            esp_efuse_enable_rom_secure_download_mode()
+
+
 endmenu  # Security features
 

components/bootloader/Makefile.projbuild

@@ -45,7 +45,7 @@ clean: bootloader-clean
 bootloader-list-components:
 	$(BOOTLOADER_MAKE) list-components
 
-ifndef CONFIG_SECURE_BOOT_ENABLED
+ifndef CONFIG_SECURE_BOOT
 # If secure boot disabled, bootloader flashing is integrated
 # with 'make flash' and no warnings are printed.
 
@@ -102,7 +102,7 @@ endif
 bootloader: $(BOOTLOADER_DIGEST_BIN)
 	@echo $(SEPARATOR)
 	@echo "Bootloader built and secure digest generated. First time flash command is:"
-	@echo "$(ESPEFUSEPY) burn_key secure_boot $(SECURE_BOOTLOADER_KEY)"
+	@echo "$(ESPEFUSEPY) burn_key secure_boot_v1 $(SECURE_BOOTLOADER_KEY)"
 	@echo "$(ESPTOOLPY_WRITE_FLASH) $(BOOTLOADER_OFFSET) $(BOOTLOADER_BIN)"
 	@echo $(SEPARATOR)
 	@echo "To reflash the bootloader after initial flash:"
@@ -115,13 +115,35 @@ $(BOOTLOADER_DIGEST_BIN): $(BOOTLOADER_BIN) $(SECURE_BOOTLOADER_KEY) | check_pyt
 	@echo "DIGEST $(notdir $@)"
 	$(ESPSECUREPY) digest_secure_bootloader -k $(SECURE_BOOTLOADER_KEY) -o $@ $<
 
-else # CONFIG_SECURE_BOOT_ENABLED && !CONFIG_SECURE_BOOTLOADER_REFLASHABLE && !CONFIG_SECURE_BOOTLOADER_ONE_TIME_FLASH
+else ifdef CONFIG_SECURE_BOOT_V2_ENABLED
+BOOTLOADER_SIGNED_BIN := $(BOOTLOADER_BUILD_DIR)/bootloader-signed.bin
+ifdef CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES
+bootloader: $(BOOTLOADER_BIN) $(SDKCONFIG_MAKEFILE) | check_python_dependencies
+	$(ESPSECUREPY) sign_data --keyfile $(SECURE_BOOT_SIGNING_KEY) --version 2 \
+	-o $(BOOTLOADER_SIGNED_BIN) $(BOOTLOADER_BIN)
+else
+bootloader: $(BOOTLOADER_BIN) $(SDKCONFIG_MAKEFILE) | check_python_dependencies
+	@echo "Bootloader not signed. Sign the bootloader before flashing."
+	@echo "To sign the bootloader, you can use this command:"
+	@echo "espsecure.py sign_data --keyfile SECURE_BOOT_SIGNING_KEY --version 2 $(BOOTLOADER_BIN)"
+endif
+	@echo $(SEPARATOR)
+	@echo "Use the following command to flash the bootloader:"
+ifdef CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES
+	@echo "$(ESPTOOLPY_WRITE_FLASH) $(BOOTLOADER_OFFSET) $(BOOTLOADER_SIGNED_BIN)"
+else
+	@echo "$(ESPTOOLPY_WRITE_FLASH) $(BOOTLOADER_OFFSET) $(BOOTLOADER_BIN)"
+endif
+	@echo $(SEPARATOR)
+
+else # CONFIG_SECURE_BOOT && !CONFIG_SECURE_BOOTLOADER_REFLASHABLE \
+&& !CONFIG_SECURE_BOOTLOADER_ONE_TIME_FLASH && !CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME
 bootloader:
 	@echo "Invalid bootloader target: bad sdkconfig?"
 	@exit 1
 endif
 
-ifndef CONFIG_SECURE_BOOT_ENABLED
+ifndef CONFIG_SECURE_BOOT
 # don't build bootloader by default if secure boot is enabled
 all_binaries: $(BOOTLOADER_BIN)
 endif
@@ -131,3 +153,8 @@ bootloader-clean: $(SDKCONFIG_MAKEFILE)
 ifdef CONFIG_SECURE_BOOTLOADER_REFLASHABLE
 	rm -f $(SECURE_BOOTLOADER_KEY) $(BOOTLOADER_DIGEST_BIN)
 endif
+ifdef CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME
+ifdef CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES
+	rm -f $(BOOTLOADER_SIGNED_BIN)
+endif
+endif

components/bootloader/flash_bootloader_args.in

@@ -1,4 +0,0 @@
---flash_mode ${ESPFLASHMODE}
---flash_size ${ESPFLASHSIZE}
---flash_freq ${ESPFLASHFREQ}
-${OFFSET} ${IMAGE}

components/bootloader/project_include.cmake

@@ -1,7 +1,7 @@
 set(BOOTLOADER_OFFSET 0x1000)
 
 # Do not generate flash file when building bootloader
-if(BOOTLOADER_BUILD)
+if(BOOTLOADER_BUILD OR NOT CONFIG_APP_BUILD_BOOTLOADER)
     return()
 endif()
 
@@ -19,8 +19,8 @@ set(bootloader_binary_files
 
 idf_build_get_property(project_dir PROJECT_DIR)
 
-# There are some additional processing when CONFIG_CONFIG_SECURE_SIGNED_APPS. This happens
-# when either CONFIG_SECURE_BOOT_ENABLED or SECURE_BOOT_BUILD_SIGNED_BINARIES.
+# There are some additional processing when CONFIG_SECURE_SIGNED_APPS. This happens
+# when either CONFIG_SECURE_BOOT_V1_ENABLED or CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES.
 # For both cases, the user either sets binaries to be signed during build or not
 # using CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES.
 #
@@ -29,7 +29,13 @@ idf_build_get_property(project_dir PROJECT_DIR)
 if(CONFIG_SECURE_SIGNED_APPS)
     add_custom_target(gen_secure_boot_keys)
 
-    if(CONFIG_SECURE_BOOT_ENABLED)
+    if(CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME)
+        set(secure_apps_signing_scheme "1")
+    elseif(CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME)
+        set(secure_apps_signing_scheme "2")
+    endif()
+
+    if(CONFIG_SECURE_BOOT_V1_ENABLED)
         # Check that the configuration is sane
         if((CONFIG_SECURE_BOOTLOADER_REFLASHABLE AND CONFIG_SECURE_BOOTLOADER_ONE_TIME_FLASH) OR
             (NOT CONFIG_SECURE_BOOTLOADER_REFLASHABLE AND NOT CONFIG_SECURE_BOOTLOADER_ONE_TIME_FLASH))
@@ -60,16 +66,18 @@ if(CONFIG_SECURE_SIGNED_APPS)
             # (to pick up a new signing key if one exists, etc.)
             fail_at_build_time(gen_secure_boot_signing_key
                 "Secure Boot Signing Key ${CONFIG_SECURE_BOOT_SIGNING_KEY} does not exist. Generate using:"
-                "\tespsecure.py generate_signing_key ${CONFIG_SECURE_BOOT_SIGNING_KEY}")
+                "\tespsecure.py generate_signing_key --version ${secure_apps_signing_scheme} \
+                ${CONFIG_SECURE_BOOT_SIGNING_KEY}")
         else()
             add_custom_target(gen_secure_boot_signing_key)
         endif()
 
         set(SECURE_BOOT_SIGNING_KEY ${secure_boot_signing_key}) # needed by some other components
         set(sign_key_arg "-DSECURE_BOOT_SIGNING_KEY=${secure_boot_signing_key}")
+        set(ver_key_arg)
 
         add_dependencies(gen_secure_boot_keys gen_secure_boot_signing_key)
-    else()
+    elseif(CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME)
 
         get_filename_component(secure_boot_verification_key
             ${CONFIG_SECURE_BOOT_VERIFICATION_KEY}
@@ -82,15 +90,19 @@ if(CONFIG_SECURE_SIGNED_APPS)
             fail_at_build_time(gen_secure_boot_verification_key
                 "Secure Boot Verification Public Key ${CONFIG_SECURE_BOOT_VERIFICATION_KEY} does not exist."
                 "\tThis can be extracted from the private signing key."
-                "\tSee docs/security/secure-boot.rst for details.")
+                "\tSee docs/security/secure-boot-v1.rst for details.")
         else()
             add_custom_target(gen_secure_boot_verification_key)
         endif()
 
+        set(sign_key_arg)
         set(ver_key_arg "-DSECURE_BOOT_VERIFICATION_KEY=${secure_boot_verification_key}")
 
         add_dependencies(gen_secure_boot_keys gen_secure_boot_verification_key)
     endif()
+else()
+    set(sign_key_arg)
+    set(ver_key_arg)
 endif()
 
 idf_build_get_property(idf_path IDF_PATH)
@@ -102,8 +114,8 @@ idf_build_get_property(extra_cmake_args EXTRA_CMAKE_ARGS)
 externalproject_add(bootloader
     SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/subproject"
     BINARY_DIR "${BOOTLOADER_BUILD_DIR}"
-    CMAKE_ARGS  -DSDKCONFIG=${sdkconfig} -DIDF_PATH=${idf_path} -DIDF_TARGET=${idf_target} -DPYTHON=${python}
-                -DPYTHON_DEPS_CHECKED=1
+    CMAKE_ARGS  -DSDKCONFIG=${sdkconfig} -DIDF_PATH=${idf_path} -DIDF_TARGET=${idf_target}
+                -DPYTHON_DEPS_CHECKED=1 -DPYTHON=${python}
                 -DEXTRA_COMPONENT_DIRS=${CMAKE_CURRENT_LIST_DIR}
                 ${sign_key_arg} ${ver_key_arg}
                 # LEGACY_INCLUDE_COMMON_HEADERS has to be passed in via cache variable since

components/bootloader/sdkconfig.rename

@@ -20,3 +20,6 @@ CONFIG_FLASH_ENCRYPTION_INSECURE                            CONFIG_SECURE_FLASH_
 CONFIG_FLASH_ENCRYPTION_UART_BOOTLOADER_ALLOW_ENCRYPT       CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_ENC
 CONFIG_FLASH_ENCRYPTION_UART_BOOTLOADER_ALLOW_DECRYPT       CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_DEC
 CONFIG_FLASH_ENCRYPTION_UART_BOOTLOADER_ALLOW_CACHE         CONFIG_SECURE_FLASH_UART_BOOTLOADER_ALLOW_CACHE
+
+# Secure Boot Scheme
+CONFIG_SECURE_BOOT_ENABLED                                  CONFIG_SECURE_BOOT_V1_ENABLED

components/bootloader/subproject/CMakeLists.txt

@@ -29,9 +29,16 @@ project(bootloader)
 idf_build_set_property(COMPILE_DEFINITIONS "-DBOOTLOADER_BUILD=1" APPEND)
 idf_build_set_property(COMPILE_OPTIONS "-fno-stack-protector" APPEND)
 
+idf_component_get_property(main_args esptool_py FLASH_ARGS)
+idf_component_get_property(sub_args esptool_py FLASH_SUB_ARGS)
+
+# String for printing flash command
+string(REPLACE ";" " " esptoolpy_write_flash
+    "${ESPTOOLPY} --port=(PORT) --baud=(BAUD) ${main_args} "
+    "write_flash ${sub_args}")
+
 string(REPLACE ";" " " espsecurepy "${ESPSECUREPY}")
 string(REPLACE ";" " " espefusepy "${ESPEFUSEPY}")
-set(esptoolpy_write_flash "${ESPTOOLPY_WRITE_FLASH_STR}")
 
 if(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
     if(CONFIG_SECURE_BOOTLOADER_KEY_ENCODING_192BIT)
@@ -83,6 +90,39 @@ if(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
     add_custom_target (gen_bootloader_digest_bin ALL DEPENDS "${bootloader_digest_bin}")
 endif()
 
+if(CONFIG_SECURE_BOOT_V2_ENABLED)
+    if(CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES)
+        get_filename_component(secure_boot_signing_key
+            "${SECURE_BOOT_SIGNING_KEY}" ABSOLUTE BASE_DIR "${project_dir}")
+
+        if(NOT EXISTS "${secure_boot_signing_key}")
+        message(FATAL_ERROR
+            "Secure Boot Signing Key Not found."
+            "\nGenerate the Secure Boot V2 RSA-PSS 3072 Key."
+            "\nTo generate one, you can use this command:"
+            "\n\t${espsecurepy} generate_signing_key --version 2 ${SECURE_BOOT_SIGNING_KEY}")
+        endif()
+
+        set(bootloader_unsigned_bin "bootloader-unsigned.bin")
+        add_custom_command(OUTPUT ".signed_bin_timestamp"
+            COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_BINARY_DIR}/${PROJECT_BIN}" "${CMAKE_BINARY_DIR}/${bootloader_unsigned_bin}"
+            COMMAND ${ESPSECUREPY} sign_data --version 2 --keyfile "${secure_boot_signing_key}"
+            -o "${CMAKE_BINARY_DIR}/${PROJECT_BIN}" "${CMAKE_BINARY_DIR}/${bootloader_unsigned_bin}"
+            COMMAND ${CMAKE_COMMAND} -E echo "Generated signed binary image ${build_dir}/${PROJECT_BIN}"
+            "from ${CMAKE_BINARY_DIR}/${bootloader_unsigned_bin}"
+            COMMAND ${CMAKE_COMMAND} -E md5sum "${CMAKE_BINARY_DIR}/${PROJECT_BIN}" > "${CMAKE_BINARY_DIR}/.signed_bin_timestamp"
+            DEPENDS "${build_dir}/.bin_timestamp"
+            VERBATIM
+            COMMENT "Generated the signed Bootloader")
+    else()
+        add_custom_command(OUTPUT ".signed_bin_timestamp"
+        VERBATIM
+        COMMENT "Bootloader generated but not signed")
+    endif()
+
+    add_custom_target (gen_signed_bootloader ALL DEPENDS "${build_dir}/.signed_bin_timestamp")
+endif()
+
 if(CONFIG_SECURE_BOOTLOADER_ONE_TIME_FLASH)
     add_custom_command(TARGET bootloader.elf POST_BUILD
         COMMAND ${CMAKE_COMMAND} -E echo
@@ -107,7 +147,7 @@ elseif(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
         COMMAND ${CMAKE_COMMAND} -E echo
             "Burn secure boot key to efuse using:"
         COMMAND ${CMAKE_COMMAND} -E echo
-            "\t${espefusepy} burn_key secure_boot ${secure_bootloader_key}"
+            "\t${espefusepy} burn_key secure_boot_v1 ${secure_bootloader_key}"
         COMMAND ${CMAKE_COMMAND} -E echo
             "First time flash command is:"
         COMMAND ${CMAKE_COMMAND} -E echo
@@ -126,4 +166,36 @@ elseif(CONFIG_SECURE_BOOTLOADER_REFLASHABLE)
             "* Not recommended to re-use the same secure boot keyfile on multiple production devices."
         DEPENDS gen_secure_bootloader_key gen_bootloader_digest_bin
         VERBATIM)
+elseif(CONFIG_SECURE_BOOT_V2_ENABLED AND CONFIG_IDF_TARGET_ESP32S2)
+    add_custom_command(TARGET bootloader.elf POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "=============================================================================="
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "Bootloader built. Secure boot enabled, so bootloader not flashed automatically."
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "To sign the bootloader with additional private keys."
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "\t${espsecurepy} sign_data -k secure_boot_signing_key2.pem -v 2 --append_signatures -o signed_bootloader.bin build/bootloader/bootloader.bin"
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "Secure boot enabled, so bootloader not flashed automatically."
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "\t${esptoolpy_write_flash} ${BOOTLOADER_OFFSET} ${CMAKE_BINARY_DIR}/bootloader.bin"
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "=============================================================================="
+    DEPENDS gen_signed_bootloader
+    VERBATIM)
+elseif(CONFIG_SECURE_BOOT_V2_ENABLED)
+    add_custom_command(TARGET bootloader.elf POST_BUILD
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "=============================================================================="
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "Bootloader built. Secure boot enabled, so bootloader not flashed automatically."
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "Secure boot enabled, so bootloader not flashed automatically."
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "\t${esptoolpy_write_flash} ${BOOTLOADER_OFFSET} ${CMAKE_BINARY_DIR}/bootloader.bin"
+    COMMAND ${CMAKE_COMMAND} -E echo
+        "=============================================================================="
+    DEPENDS gen_signed_bootloader
+    VERBATIM)
 endif()

components/bootloader/subproject/components/micro-ecc/CMakeLists.txt

@@ -1,3 +1,3 @@
-# only compile the "micro-ecc/uECC.c" source file
-idf_component_register(SRCS "micro-ecc/uECC.c"
-                    INCLUDE_DIRS micro-ecc)
+# only compile the "uECC_verify_antifault.c" file which includes the "micro-ecc/uECC.c" source file
+idf_component_register(SRCS "uECC_verify_antifault.c"
+                    INCLUDE_DIRS . micro-ecc)

components/bootloader/subproject/components/micro-ecc/component.mk

@@ -1,8 +1,6 @@
-# only compile the micro-ecc/uECC.c source file
-# (SRCDIRS is needed so build system can find the source file)
-COMPONENT_SRCDIRS := micro-ecc
-COMPONENT_OBJS := micro-ecc/uECC.o
+# only compile the "uECC_verify_antifault.c" file which includes the "micro-ecc/uECC.c" source file
+COMPONENT_SRCDIRS := .
 
-COMPONENT_ADD_INCLUDEDIRS := micro-ecc
+COMPONENT_ADD_INCLUDEDIRS := . micro-ecc
 
 COMPONENT_SUBMODULES := micro-ecc

components/bootloader/subproject/components/micro-ecc/uECC_verify_antifault.c

@@ -0,0 +1,141 @@
+/* Copyright 2014, Kenneth MacKay. Licensed under the BSD 2-clause license.
+
+   Modifications Copyright 2020, Espressif Systems (Shanghai) PTE LTD. Licensed under the BSD
+   2-clause license.
+*/
+
+/* uECC_verify() calls a number of static functions form here and
+   uses other definitions, so we just build that whole source file here and then append
+   our modified version uECC_verify_antifault(). */
+#include "micro-ecc/uECC.c"
+
+/* Version of uECC_verify() which also copies message_hash into verified_hash,
+   but only if the signature is valid. Does this in an FI resistant way.
+*/
+int uECC_verify_antifault(const uint8_t *public_key,
+                const uint8_t *message_hash,
+                unsigned hash_size,
+                const uint8_t *signature,
+                uECC_Curve curve,
+                uint8_t *verified_hash) {
+    uECC_word_t u1[uECC_MAX_WORDS], u2[uECC_MAX_WORDS];
+    uECC_word_t z[uECC_MAX_WORDS];
+    uECC_word_t sum[uECC_MAX_WORDS * 2];
+    uECC_word_t rx[uECC_MAX_WORDS];
+    uECC_word_t ry[uECC_MAX_WORDS];
+    uECC_word_t tx[uECC_MAX_WORDS];
+    uECC_word_t ty[uECC_MAX_WORDS];
+    uECC_word_t tz[uECC_MAX_WORDS];
+    const uECC_word_t *points[4];
+    const uECC_word_t *point;
+    bitcount_t num_bits;
+    bitcount_t i;
+#if uECC_VLI_NATIVE_LITTLE_ENDIAN
+    uECC_word_t *_public = (uECC_word_t *)public_key;
+#else
+    uECC_word_t _public[uECC_MAX_WORDS * 2];
+#endif    
+    uECC_word_t r[uECC_MAX_WORDS], s[uECC_MAX_WORDS];
+    wordcount_t num_words = curve->num_words;
+    wordcount_t num_n_words = BITS_TO_WORDS(curve->num_n_bits);
+
+    rx[num_n_words - 1] = 0;
+    r[num_n_words - 1] = 0;
+    s[num_n_words - 1] = 0;
+
+#if uECC_VLI_NATIVE_LITTLE_ENDIAN
+    bcopy((uint8_t *) r, signature, curve->num_bytes);
+    bcopy((uint8_t *) s, signature + curve->num_bytes, curve->num_bytes);
+#else
+    uECC_vli_bytesToNative(_public, public_key, curve->num_bytes);
+    uECC_vli_bytesToNative(
+        _public + num_words, public_key + curve->num_bytes, curve->num_bytes);
+    uECC_vli_bytesToNative(r, signature, curve->num_bytes);
+    uECC_vli_bytesToNative(s, signature + curve->num_bytes, curve->num_bytes);
+#endif
+
+    /* r, s must not be 0. */
+    if (uECC_vli_isZero(r, num_words) || uECC_vli_isZero(s, num_words)) {
+        return 0;
+    }
+
+    /* r, s must be < n. */
+    if (uECC_vli_cmp(curve->n, r, num_n_words) != 1 ||
+            uECC_vli_cmp(curve->n, s, num_n_words) != 1) {
+        return 0;
+    }
+
+    /* Calculate u1 and u2. */
+    uECC_vli_modInv(z, s, curve->n, num_n_words); /* z = 1/s */
+    u1[num_n_words - 1] = 0;
+    bits2int(u1, message_hash, hash_size, curve);
+    uECC_vli_modMult(u1, u1, z, curve->n, num_n_words); /* u1 = e/s */
+    uECC_vli_modMult(u2, r, z, curve->n, num_n_words); /* u2 = r/s */
+
+    /* Calculate sum = G + Q. */
+    uECC_vli_set(sum, _public, num_words);
+    uECC_vli_set(sum + num_words, _public + num_words, num_words);
+    uECC_vli_set(tx, curve->G, num_words);
+    uECC_vli_set(ty, curve->G + num_words, num_words);
+    uECC_vli_modSub(z, sum, tx, curve->p, num_words); /* z = x2 - x1 */
+    XYcZ_add(tx, ty, sum, sum + num_words, curve);
+    uECC_vli_modInv(z, z, curve->p, num_words); /* z = 1/z */
+    apply_z(sum, sum + num_words, z, curve);
+
+    /* Use Shamir's trick to calculate u1*G + u2*Q */
+    points[0] = 0;
+    points[1] = curve->G;
+    points[2] = _public;
+    points[3] = sum;
+    num_bits = smax(uECC_vli_numBits(u1, num_n_words),
+                    uECC_vli_numBits(u2, num_n_words));
+
+    point = points[(!!uECC_vli_testBit(u1, num_bits - 1)) |
+                   ((!!uECC_vli_testBit(u2, num_bits - 1)) << 1)];
+    uECC_vli_set(rx, point, num_words);
+    uECC_vli_set(ry, point + num_words, num_words);
+    uECC_vli_clear(z, num_words);
+    z[0] = 1;
+
+    for (i = num_bits - 2; i >= 0; --i) {
+        uECC_word_t index;
+        curve->double_jacobian(rx, ry, z, curve);
+
+        index = (!!uECC_vli_testBit(u1, i)) | ((!!uECC_vli_testBit(u2, i)) << 1);
+        point = points[index];
+        if (point) {
+            uECC_vli_set(tx, point, num_words);
+            uECC_vli_set(ty, point + num_words, num_words);
+            apply_z(tx, ty, z, curve);
+            uECC_vli_modSub(tz, rx, tx, curve->p, num_words); /* Z = x2 - x1 */
+            XYcZ_add(tx, ty, rx, ry, curve);
+            uECC_vli_modMult_fast(z, z, tz, curve);
+        }
+    }
+
+    uECC_vli_modInv(z, z, curve->p, num_words); /* Z = 1/Z */
+    apply_z(rx, ry, z, curve);
+
+    /* v = x1 (mod n) */
+    if (uECC_vli_cmp(curve->n, rx, num_n_words) != 1) {
+        uECC_vli_sub(rx, rx, curve->n, num_n_words);
+    }
+
+    /* Anti-FI addition. Copy message_hash into verified_hash, but do it in a
+       way that it will only happen if v == r (ie, rx == r)
+    */
+    const uECC_word_t *mhash_words = (const uECC_word_t *)message_hash;
+    uECC_word_t *vhash_words = (uECC_word_t *)verified_hash;
+    unsigned hash_words = hash_size / sizeof(uECC_word_t);
+    for (int w = 0; w < hash_words; w++) {
+        /* note: using curve->num_words here to encourage compiler to re-read this variable */
+        vhash_words[w] = mhash_words[w] ^ rx[w % curve->num_words] ^ r[w % curve->num_words];
+    }
+    /* Curve may be longer than hash, in which case keep reading the rest of the bytes */
+    for (int w = hash_words; w < curve->num_words; w++) {
+        vhash_words[w % hash_words] |= rx[w] ^ r[w];
+    }
+
+    /* Accept only if v == r. */
+    return (int)(uECC_vli_equal(rx, r, num_words));
+}

components/bootloader/subproject/components/micro-ecc/uECC_verify_antifault.h

@@ -0,0 +1,18 @@
+/* Copyright 2014, Kenneth MacKay. Licensed under the BSD 2-clause license.
+
+   Modifications Copyright 2020, Espressif Systems (Shanghai) PTE LTD. Licensed under the BSD
+   2-clause license.
+*/
+#pragma once
+#include "uECC.h"
+
+/* Version uECC_verify() that also copies message_hash to verified_hash
+   if the signature is valid, and does it in a way that is harder to attack
+   with fault injection.
+*/
+int uECC_verify_antifault(const uint8_t *public_key,
+                          const uint8_t *message_hash,
+                          unsigned hash_size,
+                          const uint8_t *signature,
+                          uECC_Curve curve,
+                          uint8_t *verified_hash);

components/bootloader/subproject/main/CMakeLists.txt

@@ -2,7 +2,8 @@ idf_component_register(SRCS "bootloader_start.c"
                     REQUIRES bootloader bootloader_support)
 
 idf_build_get_property(target IDF_TARGET)
-set(scripts "${target}.bootloader.ld"
-            "${target}.bootloader.rom.ld")
+set(scripts "ld/${target}/bootloader.ld"
+            "ld/${target}/bootloader.rom.ld")
+
+target_linker_script(${COMPONENT_LIB} INTERFACE "${scripts}")
 
-target_linker_script(${COMPONENT_LIB} INTERFACE "${scripts}")

components/bootloader/subproject/main/Makefile.projbuild

@@ -1,4 +0,0 @@
-# Submodules normally added in component.mk, but fully qualified
-# paths can be added at this level (we need binary librtc to be
-# available to link bootloader).
-COMPONENT_SUBMODULES += $(IDF_PATH)/components/esp_wifi/lib_esp32

components/bootloader/subproject/main/bootloader_start.c

@@ -1,4 +1,4 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,39 +11,39 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#include <string.h>
-#include <stdint.h>
 #include <stdbool.h>
-
 #include "esp_log.h"
-#include "esp32/rom/gpio.h"
-#include "esp32/rom/spi_flash.h"
-#include "bootloader_config.h"
 #include "bootloader_init.h"
 #include "bootloader_utility.h"
 #include "bootloader_common.h"
-#include "sdkconfig.h"
-#include "esp_image_format.h"
-#include "esp32/rom/rtc.h"
 
-static const char* TAG = "boot";
+static const char *TAG = "boot";
 
-static int select_partition_number (bootloader_state_t *bs);
+static int select_partition_number(bootloader_state_t *bs);
 static int selected_boot_partition(const bootloader_state_t *bs);
+
 /*
  * We arrive here after the ROM bootloader finished loading this second stage bootloader from flash.
  * The hardware is mostly uninitialized, flash cache is down and the app CPU is in reset.
  * We do have a stack, so we can do the initialization in C.
  */
-void __attribute__((noreturn)) call_start_cpu0()
+void __attribute__((noreturn)) call_start_cpu0(void)
 {
     // 1. Hardware initialization
     if (bootloader_init() != ESP_OK) {
         bootloader_reset();
     }
 
+#ifdef CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP
+    // If this boot is a wake up from the deep sleep then go to the short way,
+    // try to load the application which worked before deep sleep.
+    // It skips a lot of checks due to it was done before (while first boot).
+    bootloader_utility_load_boot_image_from_deep_sleep();
+    // If it is not successful try to load an application as usual.
+#endif
+
     // 2. Select the number of boot partition
-    bootloader_state_t bs = { 0 };
+    bootloader_state_t bs = {0};
     int boot_index = select_partition_number(&bs);
     if (boot_index == INVALID_INDEX) {
         bootloader_reset();
@@ -54,7 +54,7 @@ void __attribute__((noreturn)) call_start_cpu0()
 }
 
 // Select the number of boot partition
-static int select_partition_number (bootloader_state_t *bs)
+static int select_partition_number(bootloader_state_t *bs)
 {
     // 1. Load partition table
     if (!bootloader_utility_load_partition_table(bs)) {
@@ -76,7 +76,7 @@ static int selected_boot_partition(const bootloader_state_t *bs)
     if (boot_index == INVALID_INDEX) {
         return boot_index; // Unrecoverable failure (not due to corrupt ota data or bad partition contents)
     }
-    if (rtc_get_reset_reason(0) != DEEPSLEEP_RESET) {
+    if (bootloader_common_get_reset_reason(0) != DEEPSLEEP_RESET) {
         // Factory firmware.
 #ifdef CONFIG_BOOTLOADER_FACTORY_RESET
         if (bootloader_common_check_long_hold_gpio(CONFIG_BOOTLOADER_NUM_PIN_FACTORY_RESET, CONFIG_BOOTLOADER_HOLD_TIME_GPIO) == 1) {
@@ -93,7 +93,7 @@ static int selected_boot_partition(const bootloader_state_t *bs)
             return bootloader_utility_get_selected_boot_partition(bs);
         }
 #endif
-       // TEST firmware.
+        // TEST firmware.
 #ifdef CONFIG_BOOTLOADER_APP_TEST
         if (bootloader_common_check_long_hold_gpio(CONFIG_BOOTLOADER_NUM_PIN_APP_TEST, CONFIG_BOOTLOADER_HOLD_TIME_GPIO) == 1) {
             ESP_LOGI(TAG, "Detect a boot condition of the test firmware");
@@ -115,7 +115,7 @@ static int selected_boot_partition(const bootloader_state_t *bs)
 }
 
 // Return global reent struct if any newlib functions are linked to bootloader
-struct _reent* __getreent() {
+struct _reent *__getreent(void)
+{
     return _GLOBAL_REENT;
 }
-

components/bootloader/subproject/main/component.mk

@@ -6,14 +6,20 @@
 #
 
 LINKER_SCRIPTS := \
-    $(IDF_TARGET).bootloader.ld \
-    $(IDF_TARGET).bootloader.rom.ld \
+    $(COMPONENT_PATH)/ld/$(IDF_TARGET)/bootloader.ld \
+    $(COMPONENT_PATH)/ld/$(IDF_TARGET)/bootloader.rom.ld \
     $(IDF_PATH)/components/esp_rom/$(IDF_TARGET)/ld/$(IDF_TARGET).rom.ld \
     $(IDF_PATH)/components/esp_rom/$(IDF_TARGET)/ld/$(IDF_TARGET).rom.newlib-funcs.ld \
     $(IDF_PATH)/components/$(IDF_TARGET)/ld/$(IDF_TARGET).peripherals.ld
 
-ifndef CONFIG_SPI_FLASH_ROM_DRIVER_PATCH
-LINKER_SCRIPTS += $(IDF_PATH)/components/esp_rom/$(IDF_TARGET)/ld/$(IDF_TARGET).rom.spiflash.ld
+# SPI driver patch for ROM is only needed in ESP32
+ifdef CONFIG_IDF_TARGET_ESP32
+    ifndef CONFIG_SPI_FLASH_ROM_DRIVER_PATCH
+        LINKER_SCRIPTS += $(IDF_PATH)/components/esp_rom/$(IDF_TARGET)/ld/$(IDF_TARGET).rom.spiflash.ld
+    endif
+    ifdef CONFIG_ESP32_REV_MIN_3 
+        LINKER_SCRIPTS += $(IDF_PATH)/components/esp_rom/$(IDF_TARGET)/ld/$(IDF_TARGET).rom.eco3.ld
+    endif
 endif
 
 COMPONENT_ADD_LDFLAGS += -L $(COMPONENT_PATH) $(addprefix -T ,$(LINKER_SCRIPTS))

components/bootloader/subproject/main/ld/esp32/bootloader.ld

@@ -11,8 +11,6 @@ Linker file used to link the bootloader.
 
 MEMORY
 {
-  /* I/O */
-  dport0_seg (RW) :                 	org = 0x3FF00000, len = 0x10
   /* IRAM POOL1, used for APP CPU cache. Bootloader runs from here during the final stage of loading the app because APP CPU is still held in reset, the main app enables APP CPU cache */
   iram_loader_seg (RWX) :           org = 0x40078000, len = 0x8000  /* 32KB, APP CPU cache */
   /* 63kB, IRAM. We skip the first 1k to prevent the entry point being
@@ -44,6 +42,8 @@ SECTIONS
     *libbootloader_support.a:bootloader_common.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_flash.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_random.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_random*.*(.literal.bootloader_random_disable .text.bootloader_random_disable)
+    *libbootloader_support.a:bootloader_efuse_esp32.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_utility.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
     *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
@@ -53,7 +53,7 @@ SECTIONS
     *libbootloader_support.a:secure_boot_signatures.*(.literal .text .literal.* .text.*)
     *libmicro-ecc.a:*.*(.literal .text .literal.* .text.*)
     *libspi_flash.a:*.*(.literal .text .literal.* .text.*)
-    *libsoc.a:rtc_wdt.*(.literal .text .literal.* .text.*)
+    *libsoc.a:wdt_hal_iram.*(.literal .text .literal.* .text.*)
     *libsoc.a:rtc_clk.*(.literal .text .literal.* .text.*)
     *libefuse.a:*.*(.literal .text .literal.* .text.*)
     *(.fini.literal)
@@ -75,6 +75,7 @@ SECTIONS
   .dram0.bss (NOLOAD) :
   {
     . = ALIGN (8);
+    _dram_start = ABSOLUTE(.);
     _bss_start = ABSOLUTE(.);
     *(.dynsbss)
     *(.sbss)
@@ -151,6 +152,7 @@ SECTIONS
     *(.gnu.linkonce.lit4.*)
     _lit4_end = ABSOLUTE(.);
     . = ALIGN(4);
+    _dram_end = ABSOLUTE(.);
   } >dram_seg
 
   .iram.text :
@@ -174,4 +176,23 @@ SECTIONS
     _etext = .;
   } > iram_seg
 
+  /** This section will be used by the debugger and disassembler to get more information
+   * about raw data present in the code.
+   * Indeed, it may be required to add some padding at some points in the code
+   * in order to align a branch/jump destination on a particular bound.
+   * Padding these instructions will generate null bytes that shall be
+   * interpreted as data, and not code by the debugger or disassembler.
+   * This section will only be present in the ELF file, not in the final binary
+   * For more details, check GCC-212
+   */
+  .xt.prop 0 :
+  {
+    KEEP (*(.xt.prop .gnu.linkonce.prop.*))
+  }
+
+  .xt.lit 0 :
+  {
+    KEEP (*(.xt.lit .gnu.linkonce.p.*))
+  }
+
 }

components/bootloader/subproject/main/ld/esp32s2/bootloader.ld

@@ -0,0 +1,184 @@
+/* Simplified memory map for the bootloader.
+ * Make sure the bootloader can load into main memory without overwriting itself.
+ */
+
+
+MEMORY
+{
+  iram_seg (RWX) :                  org = 0x4004c000, len = 0x4000  /* SRAM Block 13 */
+  iram_loader_seg (RWX) :           org = 0x40050000, len = 0x6000  /* SRAM Block 14 & part of 15 */
+  dram_seg (RW) :                   org = 0x3FFE6000, len = 0x4B00  /* Part SRAM Blocks 15 & 16, ROM static buffer starts at end of this region (reclaimed after app runs) */
+}
+
+/*  Default entry point:  */
+ENTRY(call_start_cpu0);
+
+
+SECTIONS
+{
+
+  .iram_loader.text :
+  {
+    . = ALIGN (16);
+    _loader_text_start = ABSOLUTE(.);
+    *(.stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
+     *(.iram1 .iram1.*) /* catch stray IRAM_ATTR */
+    *liblog.a:(.literal .text .literal.* .text.*)
+    *libgcc.a:(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_common.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_flash.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_random.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_random*.*(.literal.bootloader_random_disable .text.bootloader_random_disable)
+    *libbootloader_support.a:bootloader_efuse_esp32s2.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_utility.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:bootloader_sha.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:esp_image_format.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:flash_encrypt.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:flash_partitions.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:secure_boot.*(.literal .text .literal.* .text.*)
+    *libbootloader_support.a:secure_boot_signatures.*(.literal .text .literal.* .text.*)
+    *libmicro-ecc.a:*.*(.literal .text .literal.* .text.*)
+    *libspi_flash.a:*.*(.literal .text .literal.* .text.*)
+    *libsoc.a:wdt_hal_iram.*(.literal .text .literal.* .text.*)
+    *libsoc.a:regi2c_ctrl.*(.literal .text .literal.* .text.*)
+    *libefuse.a:*.*(.literal .text .literal.* .text.*)
+    *(.fini.literal)
+    *(.fini)
+    *(.gnu.version)
+    _loader_text_end = ABSOLUTE(.);
+  } > iram_loader_seg
+
+  .iram.text :
+  {
+    . = ALIGN (16);
+    *(.entry.text)
+    *(.init.literal)
+    *(.init)
+  } > iram_seg
+
+
+  /* Shared RAM */
+  .dram0.bss (NOLOAD) :
+  {
+    . = ALIGN (8);
+    _dram_start = ABSOLUTE(.);
+    _bss_start = ABSOLUTE(.);
+    *(.dynsbss)
+    *(.sbss)
+    *(.sbss.*)
+    *(.gnu.linkonce.sb.*)
+    *(.scommon)
+    *(.sbss2)
+    *(.sbss2.*)
+    *(.gnu.linkonce.sb2.*)
+    *(.dynbss)
+    *(.bss)
+    *(.bss.*)
+    *(.gnu.linkonce.b.*)
+    *(COMMON)
+    . = ALIGN (8);
+    _bss_end = ABSOLUTE(.);
+  } >dram_seg
+
+  .dram0.data :
+  {
+    _data_start = ABSOLUTE(.);
+    *(.data)
+    *(.data.*)
+    *(.gnu.linkonce.d.*)
+    *(.data1)
+    *(.sdata)
+    *(.sdata.*)
+    *(.gnu.linkonce.s.*)
+    *(.sdata2)
+    *(.sdata2.*)
+    *(.gnu.linkonce.s2.*)
+    *(.jcr)
+    _data_end = ABSOLUTE(.);
+  } >dram_seg
+
+  .dram0.rodata :
+  {
+    _rodata_start = ABSOLUTE(.);
+    *(.rodata)
+    *(.rodata.*)
+    *(.gnu.linkonce.r.*)
+    *(.rodata1)
+    __XT_EXCEPTION_TABLE_ = ABSOLUTE(.);
+    *(.xt_except_table)
+    *(.gcc_except_table)
+    *(.gnu.linkonce.e.*)
+    *(.gnu.version_r)
+    *(.eh_frame)
+    . = (. + 3) & ~ 3;
+    /*  C++ constructor and destructor tables, properly ordered:  */
+    __init_array_start = ABSOLUTE(.);
+    KEEP (*crtbegin.*(.ctors))
+    KEEP (*(EXCLUDE_FILE (*crtend.*) .ctors))
+    KEEP (*(SORT(.ctors.*)))
+    KEEP (*(.ctors))
+    __init_array_end = ABSOLUTE(.);
+    KEEP (*crtbegin.*(.dtors))
+    KEEP (*(EXCLUDE_FILE (*crtend.*) .dtors))
+    KEEP (*(SORT(.dtors.*)))
+    KEEP (*(.dtors))
+    /*  C++ exception handlers table:  */
+    __XT_EXCEPTION_DESCS_ = ABSOLUTE(.);
+    *(.xt_except_desc)
+    *(.gnu.linkonce.h.*)
+    __XT_EXCEPTION_DESCS_END__ = ABSOLUTE(.);
+    *(.xt_except_desc_end)
+    *(.dynamic)
+    *(.gnu.version_d)
+    _rodata_end = ABSOLUTE(.);
+	/* Literals are also RO data. */
+    _lit4_start = ABSOLUTE(.);
+    *(*.lit4)
+    *(.lit4.*)
+    *(.gnu.linkonce.lit4.*)
+    _lit4_end = ABSOLUTE(.);
+    . = ALIGN(4);
+    _dram_end = ABSOLUTE(.);
+  } >dram_seg
+
+  .iram.text :
+  {
+    _stext = .;
+    _text_start = ABSOLUTE(.);
+    *(.literal .text .literal.* .text.* .stub .gnu.warning .gnu.linkonce.literal.* .gnu.linkonce.t.*.literal .gnu.linkonce.t.*)
+    *(.iram .iram.*) /* catch stray IRAM_ATTR */
+    *(.fini.literal)
+    *(.fini)
+    *(.gnu.version)
+
+    /** CPU will try to prefetch up to 16 bytes of
+      * of instructions. This means that any configuration (e.g. MMU, PMS) must allow
+      * safe access to up to 16 bytes after the last real instruction, add
+      * dummy bytes to ensure this
+      */
+    . += 16;
+
+    _text_end = ABSOLUTE(.);
+    _etext = .;
+  } > iram_seg
+
+  /** This section will be used by the debugger and disassembler to get more information
+   * about raw data present in the code.
+   * Indeed, it may be required to add some padding at some points in the code
+   * in order to align a branch/jump destination on a particular bound.
+   * Padding these instructions will generate null bytes that shall be
+   * interpreted as data, and not code by the debugger or disassembler.
+   * This section will only be present in the ELF file, not in the final binary
+   * For more details, check GCC-212
+   */
+  .xt.prop 0 :
+  {
+    KEEP (*(.xt.prop .gnu.linkonce.prop.*))
+  }
+
+  .xt.lit 0 :
+  {
+    KEEP (*(.xt.lit .gnu.linkonce.p.*))
+  }
+
+}

components/bootloader/subproject/main/ld/esp32s2/bootloader.rom.ld

@@ -0,0 +1,13 @@
+/*
+ * ESP32S2 ROM address table
+ * Generated for ROM with MD5sum: 0a2c7ec5109c17884606d23b47045796
+*/
+PROVIDE (ets_update_cpu_frequency = 0x4000d8a4);
+
+PROVIDE (MD5Final = 0x4000530c);
+PROVIDE (MD5Init = 0x4000526c);
+PROVIDE (MD5Update = 0x4000528c);
+/* bootloader will use following functions from xtensa hal library */
+xthal_get_ccount = 0x4001aa90;
+xthal_get_ccompare = 0x4001aabc;
+xthal_set_ccompare = 0x4001aa98;

components/bootloader_support/CMakeLists.txt

@@ -1,42 +1,60 @@
-set(srcs 
+set(srcs
     "src/bootloader_clock.c"
     "src/bootloader_common.c"
     "src/bootloader_flash.c"
-    "src/bootloader_flash_config.c"
+    "src/bootloader_mem.c"
     "src/bootloader_random.c"
+    "src/bootloader_random_${IDF_TARGET}.c"
     "src/bootloader_utility.c"
     "src/esp_image_format.c"
     "src/flash_encrypt.c"
     "src/flash_partitions.c"
-    "src/flash_qio_mode.c")
+    "src/flash_qio_mode.c"
+    "src/bootloader_flash_config_${IDF_TARGET}.c"
+    "src/bootloader_efuse_${IDF_TARGET}.c"
+    )
 
 if(BOOTLOADER_BUILD)
     set(include_dirs "include" "include_bootloader")
-    set(requires soc)  #unfortunately the header directly uses SOC registers
     set(priv_requires micro-ecc spi_flash efuse)
-    list(APPEND srcs 
-        "src/bootloader_init.c"
-        "src/${IDF_TARGET}/bootloader_sha.c"
-        "src/${IDF_TARGET}/flash_encrypt.c"
-        "src/${IDF_TARGET}/secure_boot_signatures.c"
-        "src/${IDF_TARGET}/secure_boot.c")
+    list(APPEND srcs
+    "src/bootloader_init.c"
+    "src/${IDF_TARGET}/bootloader_sha.c"
+    "src/${IDF_TARGET}/flash_encrypt.c"
+    "src/${IDF_TARGET}/bootloader_${IDF_TARGET}.c"
+    )
 else()
-    list(APPEND srcs 
-        "src/idf/bootloader_sha.c"
-        "src/idf/secure_boot_signatures.c")
+    list(APPEND srcs
+        "src/idf/bootloader_sha.c")
     set(include_dirs "include")
     set(priv_include_dirs "include_bootloader")
-    set(requires soc) #unfortunately the header directly uses SOC registers
     set(priv_requires spi_flash mbedtls efuse)
 endif()
 
+if(CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME OR CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME)
+    if(BOOTLOADER_BUILD)
+        list(APPEND srcs
+        "src/${IDF_TARGET}/secure_boot_signatures.c")
+    else()
+        list(APPEND srcs
+            "src/idf/secure_boot_signatures.c")
+    endif()
+endif()
+
+if(CONFIG_SECURE_BOOT AND BOOTLOADER_BUILD)
+    list(APPEND srcs
+        "src/${IDF_TARGET}/secure_boot.c")
+endif()
+
+set(requires soc) #unfortunately the header directly uses SOC registers
+
 idf_component_register(SRCS "${srcs}"
                     INCLUDE_DIRS "${include_dirs}"
                     PRIV_INCLUDE_DIRS "${priv_include_dirs}"
                     REQUIRES "${requires}"
                     PRIV_REQUIRES "${priv_requires}")
 
-if(CONFIG_SECURE_SIGNED_APPS)
+if(CONFIG_SECURE_SIGNED_APPS AND (CONFIG_SECURE_BOOT_V1_ENABLED OR CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME))
     if(BOOTLOADER_BUILD)
         # Whether CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES or not, we need verification key to embed
         # in the library.

components/bootloader_support/component.mk

@@ -19,11 +19,27 @@ ifndef IS_BOOTLOADER_BUILD
 COMPONENT_OBJEXCLUDE := src/bootloader_init.o
 endif
 
+COMPONENT_OBJEXCLUDE += src/bootloader_flash_config_esp32s2.o \
+			src/bootloader_efuse_esp32s2.o \
+			src/bootloader_random_esp32s2.o
+
+ifndef CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME
+ifndef CONFIG_SECURE_SIGNED_APPS_RSA_SCHEME
+COMPONENT_OBJEXCLUDE += src/$(IDF_TARGET)/secure_boot_signatures.o \
+			src/idf/secure_boot_signatures.o
+endif
+endif
+
+ifndef CONFIG_SECURE_BOOT
+COMPONENT_OBJEXCLUDE += src/$(IDF_TARGET)/secure_boot.o
+endif
+
 #
 # Secure boot signing key support
 #
 ifdef CONFIG_SECURE_SIGNED_APPS
 
+ifdef CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME
 # this path is created relative to the component build directory
 SECURE_BOOT_VERIFICATION_KEY := $(abspath signature_verification_key.bin)
 
@@ -38,7 +54,7 @@ ORIG_SECURE_BOOT_VERIFICATION_KEY := $(call resolvepath,$(call dequote,$(CONFIG_
 $(ORIG_SECURE_BOOT_VERIFICATION_KEY):
 	@echo "Secure boot verification public key '$@' missing."
 	@echo "This can be extracted from the private signing key, see"
-	@echo "docs/security/secure-boot.rst for details."
+	@echo "docs/security/secure-boot-v1.rst for details."
 	exit 1
 
 # copy it into the build dir, so the secure boot verification key has
@@ -46,10 +62,11 @@ $(ORIG_SECURE_BOOT_VERIFICATION_KEY):
 $(SECURE_BOOT_VERIFICATION_KEY): $(ORIG_SECURE_BOOT_VERIFICATION_KEY) $(SDKCONFIG_MAKEFILE)
 	$(summary) CP $< $@
 	cp $< $@
-endif
+endif #CONFIG_SECURE_BOOT_BUILD_SIGNED_BINARIES
 
 COMPONENT_EXTRA_CLEAN += $(SECURE_BOOT_VERIFICATION_KEY)
 
 COMPONENT_EMBED_FILES := $(SECURE_BOOT_VERIFICATION_KEY)
 
-endif
+endif #CONFIG_SECURE_SIGNED_APPS_ECDSA_SCHEME
+endif #CONFIG_SECURE_SIGNED_APPS

components/bootloader_support/include/bootloader_clock.h

@@ -24,6 +24,11 @@ extern "C" {
  */
 void bootloader_clock_configure(void);
 
+/** @brief Return the rated maximum frequency of this chip
+ */
+int bootloader_clock_get_rated_freq_mhz(void);
+
 #ifdef __cplusplus
 }
 #endif
+

components/bootloader_support/include/bootloader_common.h

@@ -16,6 +16,12 @@
 #include "esp_flash_partitions.h"
 #include "esp_image_format.h"
 #include "esp_app_format.h"
+// RESET_REASON is declared in rom/rtc.h
+#if CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/rtc.h"
+#endif
 
 #ifdef __cplusplus
 extern "C" {
@@ -88,6 +94,13 @@ bool bootloader_common_erase_part_type_data(const char *list_erase, bool ota_dat
  */
 bool bootloader_common_label_search(const char *list, char *label);
 
+/**
+ * @brief Configure default SPI pin modes and drive strengths
+ *
+ * @param drv GPIO drive level (determined by clock frequency)
+ */
+void bootloader_configure_spi_pins(int drv);
+
 /**
  * @brief Calculates a sha-256 for a given partition or returns a appended digest.
  *
@@ -154,6 +167,14 @@ esp_err_t bootloader_common_get_partition_description(const esp_partition_pos_t
  */
 uint8_t bootloader_common_get_chip_revision(void);
 
+/**
+ * @brief Query reset reason
+ *
+ * @param cpu_no CPU number
+ * @return reset reason enumeration
+ */
+RESET_REASON bootloader_common_get_reset_reason(int cpu_no);
+
 /**
  * @brief Check if the image (bootloader and application) has valid chip ID and revision
  *
@@ -168,7 +189,69 @@ esp_err_t bootloader_common_check_chip_validity(const esp_image_header_t* img_hd
 /**
  * @brief Configure VDDSDIO, call this API to rise VDDSDIO to 1.9V when VDDSDIO regulator is enabled as 1.8V mode.
  */
-void bootloader_common_vddsdio_configure();
+void bootloader_common_vddsdio_configure(void);
+
+#if defined( CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP ) || defined( CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC )
+/**
+ * @brief Returns partition from rtc_retain_mem
+ *
+ * Uses to get the partition of application which was worked before to go to the deep sleep.
+ * This partition was stored in rtc_retain_mem.
+ * Note: This function operates the RTC FAST memory which available only for PRO_CPU.
+ *       Make sure that this function is used only PRO_CPU.
+ *
+ * @return partition: If rtc_retain_mem is valid.
+ *        - NULL: If it is not valid.
+ */
+esp_partition_pos_t* bootloader_common_get_rtc_retain_mem_partition(void);
+
+/**
+ * @brief Update the partition and reboot_counter in rtc_retain_mem.
+ *
+ * This function saves the partition of application for fast booting from the deep sleep.
+ * An algorithm uses this partition to avoid reading the otadata and does not validate an image.
+ * Note: This function operates the RTC FAST memory which available only for PRO_CPU.
+ *       Make sure that this function is used only PRO_CPU.
+ *
+ * @param[in] partition      App partition description. Can be NULL, in this case rtc_retain_mem.partition is not updated.
+ * @param[in] reboot_counter If true then update reboot_counter.
+ *
+ */
+void bootloader_common_update_rtc_retain_mem(esp_partition_pos_t* partition, bool reboot_counter);
+
+/**
+ * @brief Reset entire rtc_retain_mem.
+ *
+ * Note: This function operates the RTC FAST memory which available only for PRO_CPU.
+ *       Make sure that this function is used only PRO_CPU.
+ */
+void bootloader_common_reset_rtc_retain_mem(void);
+
+/**
+ * @brief Returns reboot_counter from rtc_retain_mem
+ *
+ * The reboot_counter counts the number of reboots. Reset only when power is off.
+ * The very first launch of the application will be from 1.
+ * Overflow is not possible, it will stop at the value UINT16_MAX.
+ * Note: This function operates the RTC FAST memory which available only for PRO_CPU.
+ *       Make sure that this function is used only PRO_CPU.
+ *
+ * @return reboot_counter: 1..65535
+ *         - 0: If rtc_retain_mem is not valid.
+ */
+uint16_t bootloader_common_get_rtc_retain_mem_reboot_counter(void);
+
+/**
+ * @brief Returns rtc_retain_mem
+ *
+ * Note: This function operates the RTC FAST memory which available only for PRO_CPU.
+ *       Make sure that this function is used only PRO_CPU.
+ *
+ * @return rtc_retain_mem
+ */
+rtc_retain_mem_t* bootloader_common_get_rtc_retain_mem(void);
+
+#endif
 
 #ifdef __cplusplus
 }

components/bootloader_support/include/bootloader_flash.h

@@ -0,0 +1,61 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#pragma once
+
+#include <stdint.h>
+#include <esp_err.h>
+#include <esp_spi_flash.h> /* including in bootloader for error values */
+#include "sdkconfig.h"
+#include "soc/soc_caps.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Read flash ID by sending 0x9F command
+ * @return flash raw ID
+ *     mfg_id = (ID >> 16) & 0xFF;
+       flash_id = ID & 0xffff;
+ */
+uint32_t bootloader_read_flash_id(void);
+
+#if SOC_CACHE_SUPPORT_WRAP
+/**
+ * @brief Set the burst mode setting command for specified wrap mode.
+ *
+ * @param mode The specified warp mode.
+ * @return always ESP_OK
+ */
+esp_err_t bootloader_flash_wrap_set(spi_flash_wrap_mode_t mode);
+#endif
+
+/**
+ * @brief Startup flow recommended by XMC. Call at startup before any erase/write operation.
+ *
+ * @return ESP_OK When startup successfully, otherwise ESP_FAIL (indiciating you should reboot before erase/write).
+ */
+esp_err_t bootloader_flash_xmc_startup(void);
+
+/**
+  * @brief Unlock Flash write protect.
+  *        Please do not call this function in SDK.
+  *
+  * @note This can be overridden because it's attribute weak.
+  */
+esp_err_t bootloader_flash_unlock(void);
+
+#ifdef __cplusplus
+}
+#endif

components/bootloader_support/include/bootloader_flash_config.h

@@ -14,6 +14,7 @@
 
 #pragma once
 
+#include "sdkconfig.h"
 #include "esp_image_format.h"
 
 #ifdef __cplusplus
@@ -25,7 +26,7 @@ extern "C" {
  *
  * @return None
  */
-void bootloader_flash_update_id();
+void bootloader_flash_update_id(void);
 
 /**
  * @brief Update the flash size in g_rom_flashchip (global esp_rom_spiflash_chip_t structure).
@@ -43,7 +44,7 @@ void bootloader_flash_update_size(uint32_t size);
  *
  * @return None
  */
-void bootloader_flash_cs_timing_config();
+void bootloader_flash_cs_timing_config(void);
 
 /**
  * @brief Configure SPI flash clock.
@@ -74,6 +75,22 @@ void bootloader_flash_gpio_config(const esp_image_header_t* pfhdr);
  */
 void bootloader_flash_dummy_config(const esp_image_header_t* pfhdr);
 
+#ifdef CONFIG_IDF_TARGET_ESP32
+/**
+ * @brief Return the pin number used for custom SPI flash and/or SPIRAM WP pin
+ *
+ * Can be determined by eFuse values in most cases, or overriden in configuration
+ *
+ * This value is only meaningful if the other SPI flash pins are overriden via eFuse.
+ *
+ * This value is only meaningful if flash is set to QIO or QOUT mode, or if
+ * SPIRAM is enabled.
+ *
+ * @return Pin number to use, or -1 if the default should be kept
+ */
+int bootloader_flash_get_wp_pin(void);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

components/bootloader_support/include/bootloader_mem.h

@@ -0,0 +1,24 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void bootloader_init_mem(void);
+
+#ifdef __cplusplus
+}
+#endif

components/bootloader_support/include/esp_app_format.h

@@ -19,6 +19,7 @@
  */
 typedef enum {
     ESP_CHIP_ID_ESP32 = 0x0000,  /*!< chip ID: ESP32 */
+    ESP_CHIP_ID_ESP32S2 = 0x0002,  /*!< chip ID: ESP32S2 */
     ESP_CHIP_ID_INVALID = 0xFFFF /*!< Invalid chip ID (we defined it to make sure the esp_chip_id_t is 2 bytes size) */
 } __attribute__((packed)) esp_chip_id_t;
 

components/bootloader_support/include/esp_flash_encrypt.h

@@ -20,6 +20,7 @@
 #include "esp_spi_flash.h"
 #endif
 #include "soc/efuse_periph.h"
+#include "sdkconfig.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -46,11 +47,17 @@ typedef enum {
  *
  * @return true if flash encryption is enabled.
  */
-static inline /** @cond */ IRAM_ATTR /** @endcond */ bool esp_flash_encryption_enabled(void) {
-    uint32_t flash_crypt_cnt = REG_GET_FIELD(EFUSE_BLK0_RDATA0_REG, EFUSE_RD_FLASH_CRYPT_CNT);
+static inline /** @cond */ IRAM_ATTR /** @endcond */ bool esp_flash_encryption_enabled(void)
+{
+    uint32_t flash_crypt_cnt;
+#if CONFIG_IDF_TARGET_ESP32
+    flash_crypt_cnt = REG_GET_FIELD(EFUSE_BLK0_RDATA0_REG, EFUSE_RD_FLASH_CRYPT_CNT);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    flash_crypt_cnt = REG_GET_FIELD(EFUSE_RD_REPEAT_DATA1_REG, EFUSE_SPI_BOOT_CRYPT_CNT);
+#endif
     /* __builtin_parity is in flash, so we calculate parity inline */
     bool enabled = false;
-    while(flash_crypt_cnt) {
+    while (flash_crypt_cnt) {
         if (flash_crypt_cnt & 1) {
             enabled = !enabled;
         }
@@ -126,7 +133,7 @@ esp_err_t esp_flash_encrypt_region(uint32_t src_addr, size_t data_length);
  * esp_efuse_disable_rom_download_mode() before calling this function.
  *
  */
-void esp_flash_write_protect_crypt_cnt();
+void esp_flash_write_protect_crypt_cnt(void);
 
 /** @brief Return the flash encryption mode
  *
@@ -135,7 +142,7 @@ void esp_flash_write_protect_crypt_cnt();
  *
  * @return
  */
-esp_flash_enc_mode_t esp_get_flash_encryption_mode();
+esp_flash_enc_mode_t esp_get_flash_encryption_mode(void);
 
 
 /** @brief Check the flash encryption mode during startup

components/bootloader_support/include/esp_image_format.h

@@ -42,15 +42,43 @@ typedef struct {
   uint8_t image_digest[32]; /* appended SHA-256 digest */
 } esp_image_metadata_t;
 
-/* Mode selection for esp_image_load() */
 typedef enum {
-    ESP_IMAGE_VERIFY,        /* Verify image contents, load metadata. Print errors. */
-    ESP_IMAGE_VERIFY_SILENT, /* Verify image contents, load metadata. Don't print errors. */
+    ESP_IMAGE_VERIFY,            /* Verify image contents, not load to memory, load metadata. Print errors. */
+    ESP_IMAGE_VERIFY_SILENT,     /* Verify image contents, not load to memory, load metadata. Don't print errors. */
 #ifdef BOOTLOADER_BUILD
-    ESP_IMAGE_LOAD,          /* Verify image contents, load to memory. Print errors. */
+    ESP_IMAGE_LOAD,              /* Verify image contents, load to memory, load metadata. Print errors. */
+    ESP_IMAGE_LOAD_NO_VALIDATE,  /* Not verify image contents, load to memory, load metadata. Print errors. */
 #endif
 } esp_image_load_mode_t;
 
+typedef struct {
+    esp_partition_pos_t partition;  /*!< Partition of application which worked before goes to the deep sleep. */
+    uint16_t reboot_counter;        /*!< Reboot counter. Reset only when power is off. */
+    uint16_t reserve;               /*!< Reserve */
+#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
+    uint8_t custom[CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE]; /*!< Reserve for custom propose */
+#endif
+    uint32_t crc;                   /*!< Check sum crc32 */
+} rtc_retain_mem_t;
+
+#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
+_Static_assert(CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE % 4 == 0, "CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE must be a multiple of 4 bytes");
+#endif
+
+#if defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP) || defined(CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC)
+_Static_assert(CONFIG_BOOTLOADER_RESERVE_RTC_SIZE % 4 == 0, "CONFIG_BOOTLOADER_RESERVE_RTC_SIZE must be a multiple of 4 bytes");
+#endif
+
+#ifdef CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC
+#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE + CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC_SIZE)
+#elif defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP)
+#define ESP_BOOTLOADER_RESERVE_RTC (CONFIG_BOOTLOADER_RESERVE_RTC_SIZE)
+#endif
+
+#if defined(CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP) || defined(CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC)
+_Static_assert(sizeof(rtc_retain_mem_t) <= ESP_BOOTLOADER_RESERVE_RTC, "Reserved RTC area must exceed size of rtc_retain_mem_t");
+#endif
+
 /**
  * @brief Verify an app image.
  *
@@ -104,6 +132,24 @@ esp_err_t esp_image_verify(esp_image_load_mode_t mode, const esp_partition_pos_t
  */
 esp_err_t bootloader_load_image(const esp_partition_pos_t *part, esp_image_metadata_t *data);
 
+/**
+ * @brief Load an app image without verification (available only in space of bootloader).
+ *
+ * If encryption is enabled, data will be transparently decrypted.
+ *
+ * @param part Partition to load the app from.
+ * @param[inout] data Pointer to the image metadata structure which is be filled in by this function.
+ *                    'start_addr' member should be set (to the start address of the image.)
+ *                    Other fields will all be initialised by this function.
+ *
+ * @return
+ * - ESP_OK if verify or load was successful
+ * - ESP_ERR_IMAGE_FLASH_FAIL if a SPI flash error occurs
+ * - ESP_ERR_IMAGE_INVALID if the image appears invalid.
+ * - ESP_ERR_INVALID_ARG if the partition or data pointers are invalid.
+ */
+esp_err_t bootloader_load_image_no_verify(const esp_partition_pos_t *part, esp_image_metadata_t *data);
+
 /**
  * @brief Verify the bootloader image.
  *

components/bootloader_support/include/esp_secure_boot.h

@@ -16,10 +16,18 @@
 #include <stdbool.h>
 #include <esp_err.h>
 #include "soc/efuse_periph.h"
+#include "esp_image_format.h"
 
 #include "sdkconfig.h"
+#if CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/efuse.h"
+#else
+#include "esp32/rom/secure_boot.h"
+#endif
 
-#ifdef CONFIG_SECURE_BOOT_ENABLED
+typedef struct ets_secure_boot_signature ets_secure_boot_signature_t;
+
+#ifdef CONFIG_SECURE_BOOT_V1_ENABLED
 #if !defined(CONFIG_SECURE_SIGNED_ON_BOOT) || !defined(CONFIG_SECURE_SIGNED_ON_UPDATE) || !defined(CONFIG_SECURE_SIGNED_APPS)
 #error "internal sdkconfig error, secure boot should always enable all signature options"
 #endif
@@ -36,20 +44,31 @@ extern "C" {
 
 /** @brief Is secure boot currently enabled in hardware?
  *
- * Secure boot is enabled if the ABS_DONE_0 efuse is blown. This means
- * that the ROM bootloader code will only boot a verified secure
- * bootloader digest from now on.
+ * This means that the ROM bootloader code will only boot
+ * a verified secure bootloader from now on.
  *
  * @return true if secure boot is enabled.
  */
-static inline bool esp_secure_boot_enabled(void) {
-    return REG_READ(EFUSE_BLK0_RDATA6_REG) & EFUSE_RD_ABS_DONE_0;
+static inline bool esp_secure_boot_enabled(void)
+{
+#if CONFIG_IDF_TARGET_ESP32
+    #ifdef CONFIG_SECURE_BOOT_V1_ENABLED
+        return REG_READ(EFUSE_BLK0_RDATA6_REG) & EFUSE_RD_ABS_DONE_0;
+    #elif CONFIG_SECURE_BOOT_V2_ENABLED
+        return ets_use_secure_boot_v2();
+    #endif
+#elif CONFIG_IDF_TARGET_ESP32S2
+    return ets_efuse_secure_boot_enabled();
+#endif
+    return false; /* Secure Boot not enabled in menuconfig */
 }
 
 /** @brief Generate secure digest from bootloader image
  *
  * @important This function is intended to be called from bootloader code only.
  *
+ * This function is only used in the context of the Secure Boot V1 scheme.
+ * 
  * If secure boot is not yet enabled for bootloader, this will:
  *     1) generate the secure boot key and burn it on EFUSE
  *        (without enabling R/W protection)
@@ -66,18 +85,17 @@ static inline bool esp_secure_boot_enabled(void) {
  */
 esp_err_t esp_secure_boot_generate_digest(void);
 
-/** @brief Enable secure boot if it is not already enabled.
+/** @brief Enable secure boot V1 if it is not already enabled.
  *
- * @important If this function succeeds, secure boot is permanently
+ * @important If this function succeeds, secure boot V1 is permanently
  * enabled on the chip via efuse.
  *
  * @important This function is intended to be called from bootloader code only.
  *
- * @important This will enable r/w protection of secure boot key on EFUSE,
- * therefore it is to be ensured that esp_secure_boot_generate_digest()
- * is called before this
- *
- * If secure boot is not yet enabled for bootloader, this will
+ * @important In case of Secure Boot V1, this will enable r/w protection 
+ * of secure boot key on EFUSE, therefore it is to be ensured that 
+ * esp_secure_boot_generate_digest() is called before this .If secure boot is not 
+ * yet enabled for bootloader, this will
  *     1) enable R/W protection of secure boot key on EFUSE
  *     2) enable secure boot by blowing the EFUSE_RD_ABS_DONE_0 efuse.
  *
@@ -93,35 +111,97 @@ esp_err_t esp_secure_boot_generate_digest(void);
  */
 esp_err_t esp_secure_boot_permanently_enable(void);
 
-/** @brief Verify the secure boot signature (determinstic ECDSA w/ SHA256) appended to some binary data in flash.
+/** @brief Enables secure boot V2 if it is not already enabled.
  *
- * Public key is compiled into the calling program. See docs/security/secure-boot.rst for details.
+ * @important If this function succeeds, secure boot V2 is permanently
+ * enabled on the chip via efuse.
+ *
+ * @important This function is intended to be called from bootloader code only.
+ * 
+ * @important In case of Secure Boot V2, this will enable write protection 
+ * of secure boot key on EFUSE in BLK2. .If secure boot is not 
+ * yet enabled for bootloader, this will
+ *     1) enable W protection of secure boot key on EFUSE
+ *     2) enable secure boot by blowing the EFUSE_RD_ABS_DONE_1 efuse.
+ *
+ * This function does not verify secure boot of the bootloader (the
+ * ROM bootloader does this.)
+ *
+ * @param image_data Image metadata of the application to be loaded.
+ * 
+ * Will fail if efuses have been part-burned in a way that indicates
+ * secure boot should not or could not be correctly enabled.
+ *
+ * @return ESP_ERR_INVALID_STATE if efuse state doesn't allow
+ * secure boot to be enabled cleanly. ESP_OK if secure boot
+ * is enabled on this chip from now on.
+ */
+esp_err_t esp_secure_boot_v2_permanently_enable(const esp_image_metadata_t *image_data);
+
+/** @brief Verify the secure boot signature appended to some binary data in flash.
+ *
+ * For ECDSA Scheme (Secure Boot V1) - deterministic ECDSA w/ SHA256 image
+ * For RSA Scheme (Secure Boot V2) - RSA-PSS Verification of the SHA-256 image
+ * 
+ * Public key is compiled into the calling program in the ECDSA Scheme.
+ * See the apt docs/security/secure-boot-v1.rst or docs/security/secure-boot-v2.rst for details.
  *
  * @param src_addr Starting offset of the data in flash.
  * @param length Length of data in bytes. Signature is appended -after- length bytes.
  *
  * If flash encryption is enabled, the image will be transparently decrypted while being verified.
  *
+ * @note This function doesn't have any fault injection resistance so should not be called
+ * during a secure boot itself (but can be called when verifying an update, etc.)
+ *
  * @return ESP_OK if signature is valid, ESP_ERR_INVALID_STATE if
  * signature fails, ESP_FAIL for other failures (ie can't read flash).
  */
 esp_err_t esp_secure_boot_verify_signature(uint32_t src_addr, uint32_t length);
 
-/** @brief Verify the secure boot signature block (deterministic ECDSA w/ SHA256) based on the SHA256 hash of some data.
- *
- * Similar to esp_secure_boot_verify_signature(), but can be used when the digest is precalculated.
- * @param sig_block Pointer to signature block data
- * @param image_digest Pointer to 32 byte buffer holding SHA-256 hash.
- *
- */
-
 /** @brief Secure boot verification block, on-flash data format. */
 typedef struct {
     uint32_t version;
     uint8_t signature[64];
 } esp_secure_boot_sig_block_t;
 
-esp_err_t esp_secure_boot_verify_signature_block(const esp_secure_boot_sig_block_t *sig_block, const uint8_t *image_digest);
+/** @brief Verify the ECDSA secure boot signature block for Secure Boot V1.
+ *
+ *  Calculates Deterministic ECDSA w/ SHA256 based on the SHA256 hash of the image. ECDSA signature
+ *  verification must be enabled in project configuration to use this function.
+ *
+ * Similar to esp_secure_boot_verify_signature(), but can be used when the digest is precalculated.
+ * @param sig_block Pointer to ECDSA signature block data
+ * @param image_digest Pointer to 32 byte buffer holding SHA-256 hash.
+ * @param verified_digest Pointer to 32 byte buffer that will receive verified digest if verification completes. (Used during bootloader implementation only, result is invalid otherwise.)
+ *
+ */
+esp_err_t esp_secure_boot_verify_ecdsa_signature_block(const esp_secure_boot_sig_block_t *sig_block, const uint8_t *image_digest, uint8_t *verified_digest);
+
+
+/** @brief Verify the RSA secure boot signature block for Secure Boot V2.
+ *
+ *  Performs RSA-PSS Verification of the SHA-256 image based on the public key
+ *  in the signature block, compared against the public key digest stored in efuse.
+ *
+ * Similar to esp_secure_boot_verify_signature(), but can be used when the digest is precalculated.
+ * @param sig_block Pointer to RSA signature block data
+ * @param image_digest Pointer to 32 byte buffer holding SHA-256 hash.
+ * @param verified_digest Pointer to 32 byte buffer that will receive verified digest if verification completes. (Used during bootloader implementation only, result is invalid otherwise.)
+ *
+ */
+esp_err_t esp_secure_boot_verify_rsa_signature_block(const ets_secure_boot_signature_t *sig_block, const uint8_t *image_digest, uint8_t *verified_digest);
+
+/** @brief Legacy ECDSA verification function
+ *
+ * @note Deprecated, call either esp_secure_boot_verify_ecdsa_signature_block() or esp_secure_boot_verify_rsa_signature_block() instead.
+ *
+ * @param sig_block Pointer to ECDSA signature block data
+ * @param image_digest Pointer to 32 byte buffer holding SHA-256 hash.
+ */
+esp_err_t esp_secure_boot_verify_signature_block(const esp_secure_boot_sig_block_t *sig_block, const uint8_t *image_digest)
+    __attribute__((deprecated("use esp_secure_boot_verify_ecdsa_signature_block instead")));
+
 
 #define FLASH_OFFS_SECURE_BOOT_IV_DIGEST 0
 

components/bootloader_support/include_bootloader/bootloader_flash_priv.h

@@ -18,12 +18,29 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <esp_err.h>
-#include "esp_spi_flash.h"
+#include <esp_spi_flash.h> /* including in bootloader for error values */
+#include "sdkconfig.h"
+#include "bootloader_flash.h"
 
 #define FLASH_SECTOR_SIZE 0x1000
 #define FLASH_BLOCK_SIZE 0x10000
 #define MMAP_ALIGNED_MASK 0x0000FFFF
 
+/* SPI commands (actual on-wire commands not SPI controller bitmasks)
+   Suitable for use with the bootloader_execute_flash_command static function.
+*/
+#define CMD_RDID       0x9F
+#define CMD_WRSR       0x01
+#define CMD_WRSR2      0x31 /* Not all SPI flash uses this command */
+#define CMD_WREN       0x06
+#define CMD_WRDI       0x04
+#define CMD_RDSR       0x05
+#define CMD_RDSR2      0x35 /* Not all SPI flash uses this command */
+#define CMD_OTPEN      0x3A /* Enable OTP mode, not all SPI flash uses this command */
+#define CMD_RDSFDP     0x5A /* Read the SFDP of the flash */
+#define CMD_WRAP       0x77 /* Set burst with wrap command */
+
+
 /* Provide a Flash API for bootloader_support code,
    that can be used from bootloader or app code.
 
@@ -136,4 +153,29 @@ static inline uint32_t bootloader_cache_pages_to_map(uint32_t size, uint32_t vad
     return (size + (vaddr - (vaddr & MMU_FLASH_MASK)) + MMU_BLOCK_SIZE - 1) / MMU_BLOCK_SIZE;
 }
 
+/**
+ * @brief Execute a user command on the flash
+ *
+ * @param command The command value to execute.
+ * @param mosi_data MOSI data to send
+ * @param mosi_len Length of MOSI data, in bits
+ * @param miso_len Length of MISO data to receive, in bits
+ * @return Received MISO data
+ */
+uint32_t bootloader_execute_flash_command(uint8_t command, uint32_t mosi_data, uint8_t mosi_len, uint8_t miso_len);
+
+/**
+ * @brief Read the SFDP of the flash
+ *
+ * @param sfdp_addr Address of the parameter to read
+ * @param miso_byte_num Bytes to read
+ * @return The read SFDP, little endian, 4 bytes at most
+ */
+uint32_t bootloader_flash_read_sfdp(uint32_t sfdp_addr, unsigned int miso_byte_num);
+
+/**
+ * @brief Enable the flash write protect (WEL bit).
+ */
+void bootloader_enable_wp(void);
+
 #endif

components/bootloader_support/include_bootloader/bootloader_init.h

@@ -14,6 +14,37 @@
 #pragma once
 
 #include "esp_err.h"
+#include "esp_image_format.h"
+
+/**@{*/
+/**
+ * @brief labels from bootloader linker script: bootloader.ld
+ *
+ */
+extern int _bss_start;
+extern int _bss_end;
+extern int _data_start;
+extern int _data_end;
+/**@}*/
+
+/**
+ * @brief bootloader image header
+ *
+ */
+extern esp_image_header_t bootloader_image_hdr;
+
+/**@{*/
+/**
+ * @brief Common initialization steps that are applied to all targets.
+ *
+ */
+esp_err_t bootloader_read_bootloader_header(void);
+esp_err_t bootloader_check_bootloader_validity(void);
+void bootloader_clear_bss_section(void);
+void bootloader_config_wdt(void);
+void bootloader_enable_random(void);
+void bootloader_print_banner(void);
+/**@}*/
 
 /* @brief Prepares hardware for work.
  *
@@ -25,4 +56,4 @@
  *  @return ESP_OK   - If the setting is successful.
  *          ESP_FAIL - If the setting is not successful.
  */
-esp_err_t bootloader_init();
+esp_err_t bootloader_init(void);

components/bootloader_support/include_bootloader/bootloader_utility.h

@@ -15,6 +15,7 @@
 
 #include "bootloader_config.h"
 #include "esp_image_format.h"
+#include "bootloader_config.h"
 
 /**
  * @brief Load partition table.
@@ -54,6 +55,16 @@ int bootloader_utility_get_selected_boot_partition(const bootloader_state_t *bs)
  */
 __attribute__((noreturn)) void bootloader_utility_load_boot_image(const bootloader_state_t *bs, int start_index);
 
+#ifdef CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP
+/**
+ * @brief Load that application which was worked before we go to the deep sleep.
+ *
+ * Checks the reboot reason if it is the deep sleep and has a valid partition in the RTC memory
+ * then try to load the application which was worked before we go to the deep sleep.
+ *
+ */
+void bootloader_utility_load_boot_image_from_deep_sleep(void);
+#endif
 
 /**
  * @brief Software reset the ESP32
@@ -87,6 +98,18 @@ __attribute__((noreturn)) void bootloader_reset(void);
  */
 esp_err_t bootloader_sha256_hex_to_str(char *out_str, const uint8_t *in_array_hex, size_t len);
 
+/**
+ * @brief Debug log contents of a buffer as hexadecimal.
+ *
+ * @note - Only works if component log level is DEBUG or higher.
+ *       - It will print at most 128 bytes from @c buffer.
+ *
+ * @param buffer Buffer to log
+ * @param length Length of buffer in bytes. Maximum length 128 bytes.
+ * @param label Label to print at beginning of log line.
+ */
+void bootloader_debug_buffer(const void *buffer, size_t length, const char *label);
+
 /** @brief Generates the digest of the data between offset & offset+length.
  *
  * This function should be used when the size of the data is larger than 3.2MB.

components/bootloader_support/include_bootloader/flash_qio_mode.h

@@ -13,12 +13,12 @@
 // limitations under the License.
 #pragma once
 
+#include <stdint.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#include "esp_err.h"
-
 /** @brief Enable Quad I/O mode in bootloader (if configured)
  *
  * Queries attached SPI flash ID and sends correct SPI flash
@@ -32,31 +32,7 @@ void bootloader_enable_qio_mode(void);
  *     mfg_id = (ID >> 16) & 0xFF;
        flash_id = ID & 0xffff;
  */
-uint32_t bootloader_read_flash_id();
-
-/**
-  * @brief Unlock Flash write protect.
-  *        Please do not call this function in SDK.
-  *
-  * @note This can be overridden because it's attribute weak.
-  */
-esp_err_t bootloader_flash_unlock(void);
-
-/**
- * @brief Read the SFDP of the flash
- *
- * @param sfdp_addr Address of the parameter to read
- * @param miso_byte_num Bytes to read
- * @return The read SFDP, little endian, 4 bytes at most
- */
-uint32_t bootloader_flash_read_sfdp(uint32_t sfdp_addr, unsigned int miso_byte_num);
-
-/**
- * @brief Startup flow recommended by XMC. Call at startup before any erase/write operation.
- *
- * @return ESP_OK When startup successfully, otherwise ESP_FAIL (indiciating you should reboot before erase/write).
- */
-esp_err_t bootloader_flash_xmc_startup(void);
+uint32_t bootloader_read_flash_id(void);
 
 #ifdef __cplusplus
 }

components/bootloader_support/src/bootloader_clock.c

@@ -11,14 +11,22 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-#include "esp32/rom/uart.h"
-#include "esp32/rom/rtc.h"
+#include "sdkconfig.h"
 #include "soc/soc.h"
 #include "soc/rtc.h"
 #include "soc/dport_reg.h"
 #include "soc/efuse_periph.h"
+#include "soc/rtc_cntl_reg.h"
 
-void bootloader_clock_configure()
+#ifdef CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/uart.h"
+#include "esp32/rom/rtc.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/uart.h"
+#include "esp32s2/rom/rtc.h"
+#endif
+
+void bootloader_clock_configure(void)
 {
     // ROM bootloader may have put a lot of text into UART0 FIFO.
     // Wait for it to be printed.
@@ -29,7 +37,8 @@ void bootloader_clock_configure()
 
     /* Set CPU to 80MHz. Keep other clocks unmodified. */
     int cpu_freq_mhz = 80;
-
+    
+#if CONFIG_IDF_TARGET_ESP32
     /* On ESP32 rev 0, switching to 80/160 MHz if clock was previously set to
      * 240 MHz may cause the chip to lock up (see section 3.5 of the errata
      * document). For rev. 0, switch to 240 instead if it has been enabled
@@ -40,9 +49,13 @@ void bootloader_clock_configure()
             DPORT_REG_GET_FIELD(DPORT_CPU_PER_CONF_REG, DPORT_CPUPERIOD_SEL) == DPORT_CPUPERIOD_SEL_240) {
         cpu_freq_mhz = 240;
     }
+#endif
 
     rtc_clk_config_t clk_cfg = RTC_CLK_CONFIG_DEFAULT();
+#if CONFIG_IDF_TARGET_ESP32
     clk_cfg.xtal_freq = CONFIG_ESP32_XTAL_FREQ;
+#endif
+    /* ESP32-S2 doesn't have XTAL_FREQ choice, always 40MHz */
     clk_cfg.cpu_freq_mhz = cpu_freq_mhz;
     clk_cfg.slow_freq = rtc_clk_slow_freq_get();
     clk_cfg.fast_freq = rtc_clk_fast_freq_get();
@@ -52,11 +65,20 @@ void bootloader_clock_configure()
      * part of the start up time by enabling 32k XTAL early.
      * App startup code will wait until the oscillator has started up.
      */
-#ifdef CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS
+
+    /* TODO: move the clock option into esp_system, so that this doesn't have
+     * to continue:
+     */
+#if CONFIG_ESP32_RTC_CLK_SRC_EXT_CRYS
     if (!rtc_clk_32k_enabled()) {
         rtc_clk_32k_bootstrap(CONFIG_ESP32_RTC_XTAL_BOOTSTRAP_CYCLES);
     }
 #endif
+#if CONFIG_ESP32S2_RTC_CLK_SRC_EXT_CRYS
+    if (!rtc_clk_32k_enabled()) {
+        rtc_clk_32k_bootstrap(0);
+    }
+#endif
 }
 
 #ifdef BOOTLOADER_BUILD

components/bootloader_support/src/bootloader_common.c

@@ -17,17 +17,24 @@
 #include "sdkconfig.h"
 #include "esp_err.h"
 #include "esp_log.h"
+#if CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/spi_flash.h"
 #include "esp32/rom/crc.h"
 #include "esp32/rom/gpio.h"
-#include "esp_secure_boot.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"
+#include "esp32s2/rom/crc.h"
+#include "esp32s2/rom/ets_sys.h"
+#include "esp32s2/rom/gpio.h"
+#endif
 #include "esp_flash_partitions.h"
-#include "bootloader_flash.h"
+#include "bootloader_flash_priv.h"
 #include "bootloader_common.h"
 #include "bootloader_utility.h"
 #include "soc/gpio_periph.h"
 #include "soc/rtc.h"
 #include "soc/efuse_reg.h"
-#include "soc/apb_ctrl_reg.h"
+#include "soc/soc_memory_layout.h"
 #include "esp_image_format.h"
 #include "bootloader_sha.h"
 #include "sys/param.h"
@@ -246,7 +253,7 @@ esp_err_t bootloader_common_get_partition_description(const esp_partition_pos_t
     return ESP_OK;
 }
 
-void bootloader_common_vddsdio_configure()
+void bootloader_common_vddsdio_configure(void)
 {
 #if CONFIG_BOOTLOADER_VDDSDIO_BOOST_1_9V
     rtc_vddsdio_config_t cfg = rtc_vddsdio_get_config();
@@ -261,35 +268,6 @@ void bootloader_common_vddsdio_configure()
 #endif // CONFIG_BOOTLOADER_VDDSDIO_BOOST
 }
 
-#ifdef CONFIG_IDF_TARGET_ESP32
-uint8_t bootloader_common_get_chip_revision(void)
-{
-    uint8_t eco_bit0, eco_bit1, eco_bit2;
-    eco_bit0 = (REG_READ(EFUSE_BLK0_RDATA3_REG) & 0xF000) >> 15;
-    eco_bit1 = (REG_READ(EFUSE_BLK0_RDATA5_REG) & 0x100000) >> 20;
-    eco_bit2 = (REG_READ(APB_CTRL_DATE_REG) & 0x80000000) >> 31;
-    uint32_t combine_value = (eco_bit2 << 2) | (eco_bit1 << 1) | eco_bit0;
-    uint8_t chip_ver = 0;
-    switch (combine_value) {
-    case 0:
-        chip_ver = 0;
-        break;
-    case 1:
-        chip_ver = 1;
-        break;
-    case 3:
-        chip_ver = 2;
-        break;
-    case 7:
-        chip_ver = 3;
-        break;
-    default:
-        chip_ver = 0;
-        break;
-    }
-    return chip_ver;
-}
-#endif
 
 esp_err_t bootloader_common_check_chip_validity(const esp_image_header_t* img_hdr, esp_image_type type)
 {
@@ -304,7 +282,87 @@ esp_err_t bootloader_common_check_chip_validity(const esp_image_header_t* img_hd
         ESP_LOGE(TAG, "can't run on lower chip revision, expected %d, found %d", revision, img_hdr->min_chip_rev);
         err = ESP_FAIL;
     } else if (revision != img_hdr->min_chip_rev) {
+#ifdef BOOTLOADER_BUILD
         ESP_LOGI(TAG, "chip revision: %d, min. %s chip revision: %d", revision, type == ESP_IMAGE_BOOTLOADER ? "bootloader" : "application", img_hdr->min_chip_rev);
+#endif
     }
     return err;
 }
+
+RESET_REASON bootloader_common_get_reset_reason(int cpu_no)
+{
+    return rtc_get_reset_reason(cpu_no);
+}
+
+#if defined( CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP ) || defined( CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC )
+
+#define RTC_RETAIN_MEM_ADDR (SOC_RTC_DRAM_HIGH - sizeof(rtc_retain_mem_t))
+
+rtc_retain_mem_t *const rtc_retain_mem = (rtc_retain_mem_t *)RTC_RETAIN_MEM_ADDR;
+
+#if !IS_BOOTLOADER_BUILD
+/* The app needs to be told this memory is reserved, important if configured to use RTC memory as heap.
+
+   Note that keeping this macro here only works when other symbols in this file are referenced by the app, as
+   this feature is otherwise 100% part of the bootloader. However this seems to happen in all apps.
+ */
+SOC_RESERVE_MEMORY_REGION(RTC_RETAIN_MEM_ADDR, RTC_RETAIN_MEM_ADDR + sizeof(rtc_retain_mem_t), rtc_retain_mem);
+#endif
+
+static bool check_rtc_retain_mem(void)
+{
+    return crc32_le(UINT32_MAX, (uint8_t*)rtc_retain_mem, sizeof(rtc_retain_mem_t) - sizeof(rtc_retain_mem->crc)) == rtc_retain_mem->crc && rtc_retain_mem->crc != UINT32_MAX;
+}
+
+static void update_rtc_retain_mem_crc(void)
+{
+    rtc_retain_mem->crc = crc32_le(UINT32_MAX, (uint8_t*)rtc_retain_mem, sizeof(rtc_retain_mem_t) - sizeof(rtc_retain_mem->crc));
+}
+
+void bootloader_common_reset_rtc_retain_mem(void)
+{
+    memset(rtc_retain_mem, 0, sizeof(rtc_retain_mem_t));
+}
+
+uint16_t bootloader_common_get_rtc_retain_mem_reboot_counter(void)
+{
+    if (check_rtc_retain_mem()) {
+        return rtc_retain_mem->reboot_counter;
+    }
+    return 0;
+}
+
+esp_partition_pos_t* bootloader_common_get_rtc_retain_mem_partition(void)
+{
+    if (check_rtc_retain_mem()) {
+        return &rtc_retain_mem->partition;
+    }
+    return NULL;
+}
+
+void bootloader_common_update_rtc_retain_mem(esp_partition_pos_t* partition, bool reboot_counter)
+{
+    if (reboot_counter) {
+        if (!check_rtc_retain_mem()) {
+            bootloader_common_reset_rtc_retain_mem();
+        }
+        if (++rtc_retain_mem->reboot_counter == 0) {
+            // do not allow to overflow. Stop it.
+            --rtc_retain_mem->reboot_counter;
+        }
+
+    }
+
+    if (partition != NULL) {
+        rtc_retain_mem->partition.offset = partition->offset;
+        rtc_retain_mem->partition.size   = partition->size;
+    }
+
+    update_rtc_retain_mem_crc();
+}
+
+rtc_retain_mem_t* bootloader_common_get_rtc_retain_mem(void)
+{
+    return rtc_retain_mem;
+}
+#endif

components/bootloader_support/src/bootloader_efuse_esp32.c

@@ -0,0 +1,56 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "bootloader_common.h"
+#include "bootloader_clock.h"
+#include "soc/efuse_reg.h"
+#include "soc/apb_ctrl_reg.h"
+
+uint8_t bootloader_common_get_chip_revision(void)
+{
+    uint8_t eco_bit0, eco_bit1, eco_bit2;
+    eco_bit0 = (REG_READ(EFUSE_BLK0_RDATA3_REG) & 0xF000) >> 15;
+    eco_bit1 = (REG_READ(EFUSE_BLK0_RDATA5_REG) & 0x100000) >> 20;
+    eco_bit2 = (REG_READ(APB_CTRL_DATE_REG) & 0x80000000) >> 31;
+    uint32_t combine_value = (eco_bit2 << 2) | (eco_bit1 << 1) | eco_bit0;
+    uint8_t chip_ver = 0;
+    switch (combine_value) {
+    case 0:
+        chip_ver = 0;
+        break;
+    case 1:
+        chip_ver = 1;
+        break;
+    case 3:
+        chip_ver = 2;
+        break;
+    case 7:
+        chip_ver = 3;
+        break;
+    default:
+        chip_ver = 0;
+        break;
+    }
+    return chip_ver;
+}
+
+int bootloader_clock_get_rated_freq_mhz()
+{
+    //Check if ESP32 is rated for a CPU frequency of 160MHz only
+    if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
+        REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
+        return 160;
+    }
+    return 240;
+}

components/bootloader_support/src/bootloader_efuse_esp32s2.c

@@ -0,0 +1,24 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "sdkconfig.h"
+#include "bootloader_clock.h"
+#include "bootloader_common.h"
+#include "soc/efuse_reg.h"
+
+uint8_t bootloader_common_get_chip_revision(void)
+{
+    // should return the same value as esp_efuse_get_chip_ver()
+    return REG_GET_FIELD(EFUSE_RD_MAC_SPI_SYS_3_REG, EFUSE_WAFER_VERSION);
+}

components/bootloader_support/src/bootloader_flash.c

@@ -13,11 +13,43 @@
 // limitations under the License.
 #include <stddef.h>
 
-#include <bootloader_flash.h>
+#include <bootloader_flash_priv.h>
 #include <esp_log.h>
-#include <esp_spi_flash.h> /* including in bootloader for error values */
 #include <esp_flash_encrypt.h>
-#include "flash_qio_mode.h"
+#include "sdkconfig.h"
+#include "soc/soc_caps.h"
+
+#if CONFIG_IDF_TARGET_ESP32
+#   include "soc/spi_struct.h"
+#   include "soc/spi_reg.h"
+    /* SPI flash controller */
+#   define SPIFLASH SPI1
+#else
+#   include "soc/spi_mem_struct.h"
+#   include "soc/spi_mem_reg.h"
+    /* SPI flash controller */
+#   define SPIFLASH SPIMEM1
+#endif
+
+#if CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/spi_flash.h"
+#include "esp32/rom/ets_sys.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"  //For SPI_Encrypt_Write
+#include "esp32s2/rom/ets_sys.h"
+#endif
+
+#define BYTESHIFT(VAR, IDX)    (((VAR) >> ((IDX) * 8)) & 0xFF)
+#define ISSI_ID                0x9D
+#define MXIC_ID                0xC2
+#define GD_Q_ID_HIGH           0xC8
+#define GD_Q_ID_MID            0x40
+#define GD_Q_ID_LOW            0x16
+
+#define ESP_BOOTLOADER_SPIFLASH_BP_MASK_ISSI    (BIT7 | BIT5 | BIT4 | BIT3 | BIT2)
+#define ESP_BOOTLOADER_SPIFLASH_QE_GD_SR2        BIT1   // QE position when you write 8 bits(for SR2) at one time.
+#define ESP_BOOTLOADER_SPIFLASH_QE_SR1_2BYTE     BIT9   // QE position when you write 16 bits at one time.
+
 
 #ifndef BOOTLOADER_BUILD
 /* Normal app version maps to esp_spi_flash.h operations...
@@ -26,7 +58,7 @@ static const char *TAG = "bootloader_mmap";
 
 static spi_flash_mmap_handle_t map;
 
-uint32_t bootloader_mmap_get_free_pages()
+uint32_t bootloader_mmap_get_free_pages(void)
 {
     return spi_flash_mmap_get_free_pages(SPI_FLASH_MMAP_DATA);
 }
@@ -38,7 +70,7 @@ const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
         return NULL; /* existing mapping in use... */
     }
     const void *result = NULL;
-    uint32_t src_page = src_addr & ~(SPI_FLASH_MMU_PAGE_SIZE-1);
+    uint32_t src_page = src_addr & ~(SPI_FLASH_MMU_PAGE_SIZE - 1);
     size += (src_addr - src_page);
     esp_err_t err = spi_flash_mmap(src_page, size, SPI_FLASH_MMAP_DATA, &result, &map);
     if (err != ESP_OK) {
@@ -50,7 +82,7 @@ const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
 
 void bootloader_munmap(const void *mapping)
 {
-    if(mapping && map) {
+    if (mapping && map) {
         spi_flash_munmap(map);
     }
     map = 0;
@@ -68,7 +100,11 @@ esp_err_t bootloader_flash_read(size_t src, void *dest, size_t size, bool allow_
 esp_err_t bootloader_flash_write(size_t dest_addr, void *src, size_t size, bool write_encrypted)
 {
     if (write_encrypted) {
+#if CONFIG_IDF_TARGET_ESP32
         return spi_flash_write_encrypted(dest_addr, src, size);
+#elif CONFIG_IDF_TARGET_ESP32S2
+        return SPI_Encrypt_Write(dest_addr, src, size);
+#endif
     } else {
         return spi_flash_write(dest_addr, src, size);
     }
@@ -84,27 +120,45 @@ esp_err_t bootloader_flash_erase_range(uint32_t start_addr, uint32_t size)
     return spi_flash_erase_range(start_addr, size);
 }
 
-#else
+#else //BOOTLOADER_BUILD
 /* Bootloader version, uses ROM functions only */
-#include <soc/dport_reg.h>
-#include <esp32/rom/spi_flash.h>
-#include <esp32/rom/cache.h>
-
+#include "soc/dport_reg.h"
+#if CONFIG_IDF_TARGET_ESP32
+#include "esp32/rom/spi_flash.h"
+#include "esp32/rom/cache.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/spi_flash.h"
+#include "esp32s2/rom/cache.h"
+#include "soc/cache_memory.h"
+#endif
 static const char *TAG = "bootloader_flash";
 
+#if CONFIG_IDF_TARGET_ESP32
 /* Use first 50 blocks in MMU for bootloader_mmap,
    50th block for bootloader_flash_read
 */
-#define MMU_BLOCK0_VADDR  0x3f400000
-#define MMU_BLOCK50_VADDR 0x3f720000
-#define MMU_FREE_PAGES    ((MMU_BLOCK50_VADDR - MMU_BLOCK0_VADDR) / FLASH_BLOCK_SIZE)
+#define MMU_BLOCK0_VADDR  SOC_DROM_LOW
+#define MMU_SIZE          (0x320000)
+#define MMU_BLOCK50_VADDR (MMU_BLOCK0_VADDR + MMU_SIZE)
+#define FLASH_READ_VADDR MMU_BLOCK50_VADDR
+#elif CONFIG_IDF_TARGET_ESP32S2
+/* Use first 63 blocks in MMU for bootloader_mmap,
+   63th block for bootloader_flash_read
+*/
+#define MMU_BLOCK0_VADDR  SOC_DROM_LOW
+#define MMU_SIZE          (0x3f0000)
+#define MMU_BLOCK63_VADDR (MMU_BLOCK0_VADDR + MMU_SIZE)
+#define FLASH_READ_VADDR MMU_BLOCK63_VADDR
+#endif
+
+#define MMU_FREE_PAGES    (MMU_SIZE / FLASH_BLOCK_SIZE)
 
 static bool mapped;
 
 // Current bootloader mapping (ab)used for bootloader_read()
 static uint32_t current_read_mapping = UINT32_MAX;
 
-uint32_t bootloader_mmap_get_free_pages()
+uint32_t bootloader_mmap_get_free_pages(void)
 {
     /**
      * Allow mapping up to 50 of the 51 available MMU blocks (last one used for reads)
@@ -119,25 +173,41 @@ const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
         ESP_LOGE(TAG, "tried to bootloader_mmap twice");
         return NULL; /* can't map twice */
     }
-    if (size > 0x320000) {
-        /* Allow mapping up to 50 of the 51 available MMU blocks (last one used for reads) */
+    if (size > MMU_SIZE) {
         ESP_LOGE(TAG, "bootloader_mmap excess size %x", size);
         return NULL;
     }
 
     uint32_t src_addr_aligned = src_addr & MMU_FLASH_MASK;
     uint32_t count = bootloader_cache_pages_to_map(size, src_addr);
+#if CONFIG_IDF_TARGET_ESP32
     Cache_Read_Disable(0);
     Cache_Flush(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    uint32_t autoload = Cache_Suspend_ICache();
+    Cache_Invalidate_ICache_All();
+#endif
     ESP_LOGD(TAG, "mmu set paddr=%08x count=%d size=%x src_addr=%x src_addr_aligned=%x",
-            src_addr & MMU_FLASH_MASK, count, size, src_addr, src_addr_aligned );
+             src_addr & MMU_FLASH_MASK, count, size, src_addr, src_addr_aligned );
+#if CONFIG_IDF_TARGET_ESP32
     int e = cache_flash_mmu_set(0, 0, MMU_BLOCK0_VADDR, src_addr_aligned, 64, count);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    int e = Cache_Ibus_MMU_Set(MMU_ACCESS_FLASH, MMU_BLOCK0_VADDR, src_addr_aligned, 64, count, 0);
+#endif
     if (e != 0) {
         ESP_LOGE(TAG, "cache_flash_mmu_set failed: %d\n", e);
+#if CONFIG_IDF_TARGET_ESP32
         Cache_Read_Enable(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+        Cache_Resume_ICache(autoload);
+#endif
         return NULL;
     }
+#if CONFIG_IDF_TARGET_ESP32
     Cache_Read_Enable(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    Cache_Resume_ICache(autoload);
+#endif
 
     mapped = true;
 
@@ -147,10 +217,17 @@ const void *bootloader_mmap(uint32_t src_addr, uint32_t size)
 void bootloader_munmap(const void *mapping)
 {
     if (mapped)  {
+#if CONFIG_IDF_TARGET_ESP32
         /* Full MMU reset */
         Cache_Read_Disable(0);
         Cache_Flush(0);
         mmu_init(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+        //TODO, save the autoload value.
+        Cache_Suspend_ICache();
+        Cache_Invalidate_ICache_All();
+        Cache_MMU_Init();
+#endif
         mapped = false;
         current_read_mapping = UINT32_MAX;
     }
@@ -158,7 +235,7 @@ void bootloader_munmap(const void *mapping)
 
 static esp_err_t spi_to_esp_err(esp_rom_spiflash_result_t r)
 {
-    switch(r) {
+    switch (r) {
     case ESP_ROM_SPIFLASH_RESULT_OK:
         return ESP_OK;
     case ESP_ROM_SPIFLASH_RESULT_ERR:
@@ -172,10 +249,18 @@ static esp_err_t spi_to_esp_err(esp_rom_spiflash_result_t r)
 
 static esp_err_t bootloader_flash_read_no_decrypt(size_t src_addr, void *dest, size_t size)
 {
+#if CONFIG_IDF_TARGET_ESP32
     Cache_Read_Disable(0);
     Cache_Flush(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    uint32_t autoload = Cache_Suspend_ICache();
+#endif
     esp_rom_spiflash_result_t r = esp_rom_spiflash_read(src_addr, dest, size);
+#if CONFIG_IDF_TARGET_ESP32
     Cache_Read_Enable(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    Cache_Resume_ICache(autoload);
+#endif
 
     return spi_to_esp_err(r);
 }
@@ -184,28 +269,42 @@ static esp_err_t bootloader_flash_read_allow_decrypt(size_t src_addr, void *dest
 {
     uint32_t *dest_words = (uint32_t *)dest;
 
-    /* Use the 51st MMU mapping to read from flash in 64KB blocks.
-       (MMU will transparently decrypt if encryption is enabled.)
-    */
     for (int word = 0; word < size / 4; word++) {
         uint32_t word_src = src_addr + word * 4;  /* Read this offset from flash */
         uint32_t map_at = word_src & MMU_FLASH_MASK; /* Map this 64KB block from flash */
         uint32_t *map_ptr;
         if (map_at != current_read_mapping) {
             /* Move the 64KB mmu mapping window to fit map_at */
+#if CONFIG_IDF_TARGET_ESP32
             Cache_Read_Disable(0);
             Cache_Flush(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+            uint32_t autoload = Cache_Suspend_ICache();
+            Cache_Invalidate_ICache_All();
+#endif
             ESP_LOGD(TAG, "mmu set block paddr=0x%08x (was 0x%08x)", map_at, current_read_mapping);
-            int e = cache_flash_mmu_set(0, 0, MMU_BLOCK50_VADDR, map_at, 64, 1);
+#if CONFIG_IDF_TARGET_ESP32
+            int e = cache_flash_mmu_set(0, 0, FLASH_READ_VADDR, map_at, 64, 1);
+#elif CONFIG_IDF_TARGET_ESP32S2
+            int e = Cache_Ibus_MMU_Set(MMU_ACCESS_FLASH, MMU_BLOCK63_VADDR, map_at, 64, 1, 0);
+#endif
             if (e != 0) {
                 ESP_LOGE(TAG, "cache_flash_mmu_set failed: %d\n", e);
+#if CONFIG_IDF_TARGET_ESP32
                 Cache_Read_Enable(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+                Cache_Resume_ICache(autoload);
+#endif
                 return ESP_FAIL;
             }
             current_read_mapping = map_at;
+#if CONFIG_IDF_TARGET_ESP32
             Cache_Read_Enable(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+            Cache_Resume_ICache(autoload);
+#endif
         }
-        map_ptr = (uint32_t *)(MMU_BLOCK50_VADDR + (word_src - map_at));
+        map_ptr = (uint32_t *)(FLASH_READ_VADDR + (word_src - map_at));
         dest_words[word] = *map_ptr;
     }
     return ESP_OK;
@@ -256,7 +355,12 @@ esp_err_t bootloader_flash_write(size_t dest_addr, void *src, size_t size, bool
     }
 
     if (write_encrypted) {
+#if CONFIG_IDF_TARGET_ESP32
         return spi_to_esp_err(esp_rom_spiflash_write_encrypted(dest_addr, src, size));
+#elif CONFIG_IDF_TARGET_ESP32S2
+        // TODO: use the same ROM AP here
+        return spi_to_esp_err(SPI_Encrypt_Write(dest_addr, src, size));
+#endif
     } else {
         return spi_to_esp_err(esp_rom_spiflash_write(dest_addr, src, size));
     }
@@ -291,4 +395,332 @@ esp_err_t bootloader_flash_erase_range(uint32_t start_addr, uint32_t size)
     }
     return spi_to_esp_err(rc);
 }
+
+#endif // BOOTLOADER_BUILD
+
+FORCE_INLINE_ATTR bool is_issi_chip(const esp_rom_spiflash_chip_t* chip)
+{
+    return BYTESHIFT(chip->device_id, 2) == ISSI_ID;
+}
+
+// For GD25Q32, GD25Q64, GD25Q127C, GD25Q128, which use single command to read/write different SR.
+FORCE_INLINE_ATTR bool is_gd_q_chip(const esp_rom_spiflash_chip_t* chip)
+{
+    return BYTESHIFT(chip->device_id, 2) == GD_Q_ID_HIGH && BYTESHIFT(chip->device_id, 1) == GD_Q_ID_MID && BYTESHIFT(chip->device_id, 0) >= GD_Q_ID_LOW;
+}
+
+FORCE_INLINE_ATTR bool is_mxic_chip(const esp_rom_spiflash_chip_t* chip)
+{
+    return BYTESHIFT(chip->device_id, 2) == MXIC_ID;
+}
+
+esp_err_t IRAM_ATTR __attribute__((weak)) bootloader_flash_unlock(void)
+{
+    // At the beginning status == new_status == status_sr2 == new_status_sr2 == 0.
+    // If the register doesn't need to be updated, keep them the same (0), so that no command will be actually sent.
+    uint16_t status = 0;    // status for SR1 or SR1+SR2 if writing SR with 01H + 2Bytes.
+    uint16_t new_status = 0;
+    uint8_t status_sr2 = 0;    // status_sr2 for SR2.
+    uint8_t new_status_sr2 = 0;
+    uint8_t sr1_bit_num = 0;
+    esp_err_t err = ESP_OK;
+
+    esp_rom_spiflash_wait_idle(&g_rom_flashchip);
+    if (is_issi_chip(&g_rom_flashchip) || is_mxic_chip(&g_rom_flashchip)) {
+        // Currently ISSI & MXIC share the same command and register layout, which is different from the default model.
+        // If any code here needs to be modified, check both chips.
+        status = bootloader_execute_flash_command(CMD_RDSR, 0, 0, 8);
+
+        /* Clear all bits in the mask.
+        (This is different from ROM esp_rom_spiflash_unlock, which keeps all bits as-is.)
+        */
+        sr1_bit_num = 8;
+        new_status = status & (~ESP_BOOTLOADER_SPIFLASH_BP_MASK_ISSI);
+    } else if (is_gd_q_chip(&g_rom_flashchip)) {
+        /* The GD chips behaviour is to clear all bits in SR1 and clear bits in SR2 except QE bit.
+           Use 01H to write SR1 and 31H to write SR2.
+        */
+        status = bootloader_execute_flash_command(CMD_RDSR, 0, 0, 8);
+        sr1_bit_num = 8;
+        new_status = 0;
+
+        status_sr2 = bootloader_execute_flash_command(CMD_RDSR2, 0, 0, 8);
+        new_status_sr2 = status_sr2 & ESP_BOOTLOADER_SPIFLASH_QE_GD_SR2;
+    } else {
+        /* For common behaviour, like XMC chips, Use 01H+2Bytes to write both SR1 and SR2*/
+        status = bootloader_execute_flash_command(CMD_RDSR, 0, 0, 8) | (bootloader_execute_flash_command(CMD_RDSR2, 0, 0, 8) << 8);
+
+        /* Clear all bits except QE, if it is set.
+        (This is different from ROM esp_rom_spiflash_unlock, which keeps all bits as-is.)
+        */
+        sr1_bit_num = 16;
+        new_status = status & ESP_BOOTLOADER_SPIFLASH_QE_SR1_2BYTE;
+    }
+
+    // When SR is written, set to true to indicate that WRDI need to be sent to ensure the protection is ON before return.
+    bool status_written = false;
+    // Skip if nothing needs to be changed. Meaningless writing to SR increases the risk during write and wastes time.
+    if (status != new_status) {
+        esp_rom_spiflash_wait_idle(&g_rom_flashchip);
+        bootloader_execute_flash_command(CMD_WREN, 0, 0, 0);
+        bootloader_execute_flash_command(CMD_WRSR, new_status, sr1_bit_num, 0);
+        status_written = true;
+    }
+
+    if (status_sr2 != new_status_sr2) {
+        esp_rom_spiflash_wait_idle(&g_rom_flashchip);
+        bootloader_execute_flash_command(CMD_WREN, 0, 0, 0);
+        bootloader_execute_flash_command(CMD_WRSR2, new_status_sr2, 8, 0);
+        status_written = true;
+    }
+
+    if (status_written) {
+        //Call esp_rom_spiflash_wait_idle to make sure previous WRSR is completed.
+        esp_rom_spiflash_wait_idle(&g_rom_flashchip);
+        bootloader_execute_flash_command(CMD_WRDI, 0, 0, 0);
+    }
+
+    return err;
+}
+
+
+/* dummy_len_plus values defined in ROM for SPI flash configuration */
+extern uint8_t g_rom_spiflash_dummy_len_plus[];
+IRAM_ATTR static uint32_t bootloader_flash_execute_command_common(
+    uint8_t command,
+    uint32_t addr_len, uint32_t address,
+    uint8_t dummy_len,
+    uint8_t mosi_len, uint32_t mosi_data,
+    uint8_t miso_len)
+{
+    assert(mosi_len <= 32);
+    assert(miso_len <= 32);
+    uint32_t old_ctrl_reg = SPIFLASH.ctrl.val;
+    uint32_t old_user_reg = SPIFLASH.user.val;
+    uint32_t old_user1_reg = SPIFLASH.user1.val;
+#if CONFIG_IDF_TARGET_ESP32
+    SPIFLASH.ctrl.val = SPI_WP_REG_M; // keep WP high while idle, otherwise leave DIO mode
+#else
+    SPIFLASH.ctrl.val = SPI_MEM_WP_REG_M; // keep WP high while idle, otherwise leave DIO mode
 #endif
+    //command phase
+    SPIFLASH.user.usr_command = 1;
+    SPIFLASH.user2.usr_command_bitlen = 7;
+    SPIFLASH.user2.usr_command_value = command;
+    //addr phase
+    SPIFLASH.user.usr_addr = addr_len > 0;
+    SPIFLASH.user1.usr_addr_bitlen = addr_len - 1;
+#if CONFIG_IDF_TARGET_ESP32
+    SPIFLASH.addr = (addr_len > 0)? (address << (32-addr_len)) : 0;
+#else
+    SPIFLASH.addr = address;
+#endif
+    //dummy phase
+    if (miso_len > 0) {
+        uint32_t total_dummy = dummy_len + g_rom_spiflash_dummy_len_plus[1];
+        SPIFLASH.user.usr_dummy = total_dummy > 0;
+        SPIFLASH.user1.usr_dummy_cyclelen = total_dummy - 1;
+    } else {
+        SPIFLASH.user.usr_dummy = 0;
+        SPIFLASH.user1.usr_dummy_cyclelen = 0;
+    }
+    //output data
+    SPIFLASH.user.usr_mosi = mosi_len > 0;
+#if CONFIG_IDF_TARGET_ESP32
+    SPIFLASH.mosi_dlen.usr_mosi_dbitlen = mosi_len ? (mosi_len - 1) : 0;
+#else
+    SPIFLASH.mosi_dlen.usr_mosi_bit_len = mosi_len ? (mosi_len - 1) : 0;
+#endif
+    SPIFLASH.data_buf[0] = mosi_data;
+    //input data
+    SPIFLASH.user.usr_miso = miso_len > 0;
+#if CONFIG_IDF_TARGET_ESP32
+    SPIFLASH.miso_dlen.usr_miso_dbitlen = miso_len ? (miso_len - 1) : 0;
+#else
+    SPIFLASH.miso_dlen.usr_miso_bit_len = miso_len ? (miso_len - 1) : 0;
+#endif
+
+    SPIFLASH.cmd.usr = 1;
+    while (SPIFLASH.cmd.usr != 0) {
+    }
+    SPIFLASH.ctrl.val = old_ctrl_reg;
+    SPIFLASH.user.val = old_user_reg;
+    SPIFLASH.user1.val = old_user1_reg;
+
+    uint32_t ret = SPIFLASH.data_buf[0];
+    if (miso_len < 32) {
+        //set unused bits to 0
+        ret &= ~(UINT32_MAX << miso_len);
+    }
+    return ret;
+}
+
+uint32_t IRAM_ATTR bootloader_execute_flash_command(uint8_t command, uint32_t mosi_data, uint8_t mosi_len, uint8_t miso_len)
+{
+    const uint8_t addr_len = 0;
+    const uint8_t address = 0;
+    const uint8_t dummy_len = 0;
+
+    return bootloader_flash_execute_command_common(command, addr_len, address,
+            dummy_len, mosi_len, mosi_data, miso_len);
+}
+
+// cmd(0x5A) + 24bit address + 8 cycles dummy
+uint32_t IRAM_ATTR bootloader_flash_read_sfdp(uint32_t sfdp_addr, unsigned int miso_byte_num)
+{
+    assert(miso_byte_num <= 4);
+    const uint8_t command = CMD_RDSFDP;
+    const uint8_t addr_len = 24;
+    const uint8_t dummy_len = 8;
+    const uint8_t mosi_len = 0;
+    const uint32_t mosi_data = 0;
+    const uint8_t miso_len = miso_byte_num * 8;
+
+    return bootloader_flash_execute_command_common(command, addr_len, sfdp_addr,
+            dummy_len, mosi_len, mosi_data, miso_len);
+}
+
+void bootloader_enable_wp(void)
+{
+    bootloader_execute_flash_command(CMD_WRDI, 0, 0, 0);   /* Exit OTP mode */
+}
+
+uint32_t IRAM_ATTR bootloader_read_flash_id(void)
+{
+    uint32_t id = bootloader_execute_flash_command(CMD_RDID, 0, 0, 24);
+    id = ((id & 0xff) << 16) | ((id >> 16) & 0xff) | (id & 0xff00);
+    return id;
+}
+
+#if SOC_CACHE_SUPPORT_WRAP
+esp_err_t bootloader_flash_wrap_set(spi_flash_wrap_mode_t mode)
+{
+    uint32_t reg_bkp_ctrl = SPIFLASH.ctrl.val;
+    uint32_t reg_bkp_usr  = SPIFLASH.user.val;
+    SPIFLASH.user.fwrite_dio = 0;
+    SPIFLASH.user.fwrite_dual = 0;
+    SPIFLASH.user.fwrite_qio = 1;
+    SPIFLASH.user.fwrite_quad = 0;
+    SPIFLASH.ctrl.fcmd_dual = 0;
+    SPIFLASH.ctrl.fcmd_quad = 0;
+    SPIFLASH.user.usr_dummy = 0;
+    SPIFLASH.user.usr_addr = 1;
+    SPIFLASH.user.usr_command = 1;
+    SPIFLASH.user2.usr_command_bitlen = 7;
+    SPIFLASH.user2.usr_command_value = CMD_WRAP;
+    SPIFLASH.user1.usr_addr_bitlen = 23;
+    SPIFLASH.addr = 0;
+    SPIFLASH.user.usr_miso = 0;
+    SPIFLASH.user.usr_mosi = 1;
+    SPIFLASH.mosi_dlen.usr_mosi_bit_len = 7;
+    SPIFLASH.data_buf[0] = (uint32_t) mode << 4;;
+    SPIFLASH.cmd.usr = 1;
+    while(SPIFLASH.cmd.usr != 0)
+    { }
+
+    SPIFLASH.ctrl.val = reg_bkp_ctrl;
+    SPIFLASH.user.val = reg_bkp_usr;
+    return ESP_OK;
+}
+#endif //SOC_CACHE_SUPPORT_WRAP
+
+/*******************************************************************************
+ * XMC startup flow
+ ******************************************************************************/
+
+#define XMC_SUPPORT CONFIG_BOOTLOADER_FLASH_XMC_SUPPORT
+#define XMC_VENDOR_ID 0x20
+
+#if BOOTLOADER_BUILD
+#define BOOTLOADER_FLASH_LOG(level, ...)    ESP_LOG##level(TAG, ##__VA_ARGS__)
+#else
+static DRAM_ATTR char bootloader_flash_tag[] = "bootloader_flash";
+#define BOOTLOADER_FLASH_LOG(level, ...)    ESP_DRAM_LOG##level(bootloader_flash_tag, ##__VA_ARGS__)
+#endif
+
+#if XMC_SUPPORT
+//strictly check the model
+static IRAM_ATTR bool is_xmc_chip_strict(uint32_t rdid)
+{
+    uint32_t vendor_id = BYTESHIFT(rdid, 2);
+    uint32_t mfid = BYTESHIFT(rdid, 1);
+    uint32_t cpid = BYTESHIFT(rdid, 0);
+
+    if (vendor_id != XMC_VENDOR_ID) {
+        return false;
+    }
+
+    bool matched = false;
+    if (mfid == 0x40) {
+        if (cpid >= 0x13 && cpid <= 0x20) {
+            matched = true;
+        }
+    } else if (mfid == 0x41) {
+        if (cpid >= 0x17 && cpid <= 0x20) {
+            matched = true;
+        }
+    } else if (mfid == 0x50) {
+        if (cpid >= 0x15 && cpid <= 0x16) {
+            matched =  true;
+        }
+    }
+    return matched;
+}
+
+esp_err_t IRAM_ATTR bootloader_flash_xmc_startup(void)
+{
+    // If the RDID value is a valid XMC one, may skip the flow
+    const bool fast_check = true;
+    if (fast_check && is_xmc_chip_strict(g_rom_flashchip.device_id)) {
+        BOOTLOADER_FLASH_LOG(D, "XMC chip detected by RDID (%08X), skip.", g_rom_flashchip.device_id);
+        return ESP_OK;
+    }
+
+    // Check the Manufacturer ID in SFDP registers (JEDEC standard). If not XMC chip, no need to run the flow
+    const int sfdp_mfid_addr = 0x10;
+    uint8_t mf_id = (bootloader_flash_read_sfdp(sfdp_mfid_addr, 1) & 0xff);
+    if (mf_id != XMC_VENDOR_ID) {
+        BOOTLOADER_FLASH_LOG(D, "non-XMC chip detected by SFDP Read (%02X), skip.", mf_id);
+        return ESP_OK;
+    }
+
+    BOOTLOADER_FLASH_LOG(I, "XM25QHxxC startup flow");
+    // Enter DPD
+    bootloader_execute_flash_command(0xB9, 0, 0, 0);
+    // Enter UDPD
+    bootloader_execute_flash_command(0x79, 0, 0, 0);
+    // Exit UDPD
+    bootloader_execute_flash_command(0xFF, 0, 0, 0);
+    // Delay tXUDPD
+    ets_delay_us(2000);
+    // Release Power-down
+    bootloader_execute_flash_command(0xAB, 0, 0, 0);
+    ets_delay_us(20);
+    // Read flash ID and check again
+    g_rom_flashchip.device_id = bootloader_read_flash_id();
+    if (!is_xmc_chip_strict(g_rom_flashchip.device_id)) {
+        BOOTLOADER_FLASH_LOG(E, "XMC flash startup fail");
+        return ESP_FAIL;
+    }
+
+    return ESP_OK;
+}
+
+#else
+//only compare the vendor id
+static IRAM_ATTR bool is_xmc_chip(uint32_t rdid)
+{
+    uint32_t vendor_id = (rdid >> 16) & 0xFF;
+    return (vendor_id == XMC_VENDOR_ID);
+}
+
+esp_err_t IRAM_ATTR bootloader_flash_xmc_startup(void)
+{
+    if (is_xmc_chip(g_rom_flashchip.device_id)) {
+        BOOTLOADER_FLASH_LOG(E, "XMC chip detected (%08X) while support disabled.", g_rom_flashchip.device_id);
+        return ESP_FAIL;
+    }
+    return ESP_OK;
+}
+
+#endif //XMC_SUPPORT

components/bootloader_support/src/bootloader_flash_config_esp32.c

@@ -25,9 +25,10 @@
 #include "soc/spi_reg.h"
 #include "soc/spi_caps.h"
 #include "flash_qio_mode.h"
+#include "bootloader_common.h"
 #include "bootloader_flash_config.h"
 
-void bootloader_flash_update_id()
+void bootloader_flash_update_id(void)
 {
     g_rom_flashchip.device_id = bootloader_read_flash_id();
 }
@@ -37,7 +38,7 @@ void bootloader_flash_update_size(uint32_t size)
     g_rom_flashchip.chip_size = size;
 }
 
-void IRAM_ATTR bootloader_flash_cs_timing_config()
+void IRAM_ATTR bootloader_flash_cs_timing_config(void)
 {
     SET_PERI_REG_MASK(SPI_USER_REG(0), SPI_CS_HOLD_M | SPI_CS_SETUP_M);
     SET_PERI_REG_BITS(SPI_CTRL2_REG(0), SPI_HOLD_TIME_V, 1, SPI_HOLD_TIME_S);
@@ -80,18 +81,11 @@ void IRAM_ATTR bootloader_flash_gpio_config(const esp_image_header_t* pfhdr)
     uint32_t chip_ver = REG_GET_FIELD(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_VER_PKG);
     uint32_t pkg_ver = chip_ver & 0x7;
 
-    if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5) {
-        // For ESP32D2WD the SPI pins are already configured
-        // flash clock signal should come from IO MUX.
-        PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CLK_U, FUNC_SD_CLK_SPICLK);
-        SET_PERI_REG_BITS(PERIPHS_IO_MUX_SD_CLK_U, FUN_DRV, drv, FUN_DRV_S);
-    } else if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2) {
-        // For ESP32PICOD2 the SPI pins are already configured
-        // flash clock signal should come from IO MUX.
-        PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CLK_U, FUNC_SD_CLK_SPICLK);
-        SET_PERI_REG_BITS(PERIPHS_IO_MUX_SD_CLK_U, FUN_DRV, drv, FUN_DRV_S);
-    } else if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4) {
-        // For ESP32PICOD4 the SPI pins are already configured
+    if (pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5 ||
+        pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD2 ||
+        pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4 ||
+        pkg_ver == EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302) {
+        // For ESP32D2WD or ESP32-PICO series,the SPI pins are already configured
         // flash clock signal should come from IO MUX.
         PIN_FUNC_SELECT(PERIPHS_IO_MUX_SD_CLK_U, FUNC_SD_CLK_SPICLK);
         SET_PERI_REG_BITS(PERIPHS_IO_MUX_SD_CLK_U, FUN_DRV, drv, FUN_DRV_S);
@@ -168,4 +162,33 @@ void IRAM_ATTR bootloader_flash_dummy_config(const esp_image_header_t* pfhdr)
 
     SET_PERI_REG_BITS(SPI_USER1_REG(0), SPI_USR_DUMMY_CYCLELEN_V, spi_cache_dummy + g_rom_spiflash_dummy_len_plus[0],
             SPI_USR_DUMMY_CYCLELEN_S);
-}
+}
+
+#define ESP32_D2WD_WP_GPIO 7 /* ESP32-D2WD & ESP32-PICO-D4 has this GPIO wired to WP pin of flash */
+#define ESP32_PICO_V3_GPIO 18 /* ESP32-PICO-V3* use this GPIO for WP pin of flash */
+
+int bootloader_flash_get_wp_pin(void)
+{
+#if CONFIG_BOOTLOADER_SPI_CUSTOM_WP_PIN
+    return CONFIG_BOOTLOADER_SPI_WP_PIN; // can be set for bootloader when QIO or QOUT config in use
+#elif CONFIG_SPIRAM_CUSTOM_SPIWP_SD3_PIN
+    return CONFIG_SPIRAM_SPIWP_SD3_PIN; // can be set for app when DIO or DOUT config used for PSRAM only
+#else
+    // no custom value, find it based on the package eFuse value
+    uint8_t chip_ver;
+    uint32_t pkg_ver = REG_GET_FIELD(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_VER_PKG);
+    switch(pkg_ver) {
+    case EFUSE_RD_CHIP_VER_PKG_ESP32U4WDH:
+    case EFUSE_RD_CHIP_VER_PKG_ESP32D2WDQ5:
+        return ESP32_D2WD_WP_GPIO;
+    case EFUSE_RD_CHIP_VER_PKG_ESP32PICOD4:
+        /* Same package IDs are used for ESP32-PICO-V3 and ESP32-PICO-D4, silicon version differentiates */
+        chip_ver = bootloader_common_get_chip_revision();
+        return (chip_ver < 3) ? ESP32_D2WD_WP_GPIO : ESP32_PICO_V3_GPIO;
+    case EFUSE_RD_CHIP_VER_PKG_ESP32PICOV302:
+        return ESP32_PICO_V3_GPIO;
+    default:
+        return SPI_WP_GPIO_NUM;
+    }
+#endif
+}

components/bootloader_support/src/bootloader_flash_config_esp32s2.c

@@ -0,0 +1,90 @@
+// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include <stdbool.h>
+#include <assert.h>
+#include "string.h"
+#include "sdkconfig.h"
+#include "esp_err.h"
+#include "esp_log.h"
+#include "esp32s2/rom/gpio.h"
+#include "esp32s2/rom/spi_flash.h"
+#include "esp32s2/rom/efuse.h"
+#include "soc/gpio_periph.h"
+#include "soc/efuse_reg.h"
+#include "soc/spi_reg.h"
+#include "soc/spi_mem_reg.h"
+#include "soc/spi_caps.h"
+#include "flash_qio_mode.h"
+#include "bootloader_flash_config.h"
+#include "bootloader_common.h"
+
+#define FLASH_IO_MATRIX_DUMMY_40M   0
+#define FLASH_IO_MATRIX_DUMMY_80M   0
+
+#define FLASH_IO_DRIVE_GD_WITH_1V8PSRAM    3
+
+void bootloader_flash_update_id()
+{
+    g_rom_flashchip.device_id = bootloader_read_flash_id();
+}
+
+void bootloader_flash_update_size(uint32_t size)
+{
+    g_rom_flashchip.chip_size = size;
+}
+
+void IRAM_ATTR bootloader_flash_cs_timing_config()
+{
+    SET_PERI_REG_MASK(SPI_MEM_USER_REG(0), SPI_MEM_CS_HOLD_M | SPI_MEM_CS_SETUP_M);
+    SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(0), SPI_MEM_CS_HOLD_TIME_V, 0, SPI_MEM_CS_HOLD_TIME_S);
+    SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(0), SPI_MEM_CS_SETUP_TIME_V, 0, SPI_MEM_CS_SETUP_TIME_S);
+    SET_PERI_REG_MASK(SPI_MEM_USER_REG(1), SPI_MEM_CS_HOLD_M | SPI_MEM_CS_SETUP_M);
+    SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(1), SPI_MEM_CS_HOLD_TIME_V, 1, SPI_MEM_CS_HOLD_TIME_S);
+    SET_PERI_REG_BITS(SPI_MEM_CTRL2_REG(1), SPI_MEM_CS_SETUP_TIME_V, 0, SPI_MEM_CS_SETUP_TIME_S);
+}
+
+void IRAM_ATTR bootloader_flash_clock_config(const esp_image_header_t* pfhdr)
+{
+    uint32_t spi_clk_div = 0;
+    switch (pfhdr->spi_speed) {
+        case ESP_IMAGE_SPI_SPEED_80M:
+            spi_clk_div = 1;
+            break;
+        case ESP_IMAGE_SPI_SPEED_40M:
+            spi_clk_div = 2;
+            break;
+        case ESP_IMAGE_SPI_SPEED_26M:
+            spi_clk_div = 3;
+            break;
+        case ESP_IMAGE_SPI_SPEED_20M:
+            spi_clk_div = 4;
+            break;
+        default:
+            break;
+    }
+    esp_rom_spiflash_config_clk(spi_clk_div, 0);
+    esp_rom_spiflash_config_clk(spi_clk_div, 1);
+}
+
+void IRAM_ATTR bootloader_flash_set_dummy_out(void)
+{
+    REG_SET_BIT(SPI_MEM_CTRL_REG(0), SPI_MEM_FDUMMY_OUT | SPI_MEM_D_POL | SPI_MEM_Q_POL);
+    REG_SET_BIT(SPI_MEM_CTRL_REG(1), SPI_MEM_FDUMMY_OUT | SPI_MEM_D_POL | SPI_MEM_Q_POL);
+}
+
+void IRAM_ATTR bootloader_flash_dummy_config(const esp_image_header_t* pfhdr)
+{
+    bootloader_configure_spi_pins(1);
+    bootloader_flash_set_dummy_out();
+}

components/bootloader_support/src/bootloader_init.c

@@ -1,4 +1,4 @@
-// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2015-2019 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -13,448 +13,98 @@
 // limitations under the License.
 #include <string.h>
 #include <stdint.h>
-#include <limits.h>
-#include <sys/param.h>
-
+#include "sdkconfig.h"
 #include "esp_attr.h"
 #include "esp_log.h"
-
-#include "esp32/rom/cache.h"
-#include "esp32/rom/efuse.h"
-#include "esp32/rom/ets_sys.h"
-#include "esp32/rom/spi_flash.h"
-#include "esp32/rom/crc.h"
-#include "esp32/rom/rtc.h"
-#include "esp32/rom/uart.h"
-#include "esp32/rom/gpio.h"
-#include "esp32/rom/secure_boot.h"
-
-#include "soc/soc.h"
-#include "soc/cpu.h"
-#include "soc/rtc.h"
-#include "soc/dport_reg.h"
-#include "soc/gpio_periph.h"
-#include "soc/efuse_periph.h"
-#include "soc/rtc_periph.h"
-#include "soc/timer_periph.h"
-#include "soc/rtc_wdt.h"
-#include "soc/spi_periph.h"
-
-#include "sdkconfig.h"
-#include "esp_image_format.h"
-#include "esp_secure_boot.h"
-#include "esp_flash_encrypt.h"
-#include "esp_flash_partitions.h"
-#include "bootloader_flash.h"
+#include "bootloader_init.h"
+#include "bootloader_flash_priv.h"
+#include "bootloader_flash_config.h"
 #include "bootloader_random.h"
-#include "bootloader_config.h"
 #include "bootloader_clock.h"
 #include "bootloader_common.h"
-#include "bootloader_flash_config.h"
+#include "esp_flash_encrypt.h"
+#include "soc/cpu.h"
+#include "soc/rtc.h"
+#include "hal/wdt_hal.h"
 
-#include "flash_qio_mode.h"
+static const char *TAG = "boot";
 
-extern int _bss_start;
-extern int _bss_end;
-extern int _data_start;
-extern int _data_end;
+esp_image_header_t WORD_ALIGNED_ATTR bootloader_image_hdr;
 
-static const char* TAG = "boot";
-
-static esp_err_t bootloader_main();
-static void print_flash_info(const esp_image_header_t* pfhdr);
-static void update_flash_config(const esp_image_header_t* pfhdr);
-static void bootloader_init_flash_configure(const esp_image_header_t* pfhdr);
-static void uart_console_configure(void);
-static void wdt_reset_check(void);
-
-
-esp_err_t bootloader_init()
+void bootloader_clear_bss_section(void)
 {
-    cpu_configure_region_protection();
-    cpu_init_memctl();
-
-    /* Sanity check that static RAM is after the stack */
-#ifndef NDEBUG
-    {
-        int *sp = get_sp();
-        assert(&_bss_start <= &_bss_end);
-        assert(&_data_start <= &_data_end);
-        assert(sp < &_bss_start);
-        assert(sp < &_data_start);
-    }
-#endif
-
-    //Clear bss
     memset(&_bss_start, 0, (&_bss_end - &_bss_start) * sizeof(_bss_start));
+}
 
-    /* completely reset MMU for both CPUs
-       (in case serial bootloader was running) */
-    Cache_Read_Disable(0);
-    Cache_Read_Disable(1);
-    Cache_Flush(0);
-    Cache_Flush(1);
-    mmu_init(0);
-    DPORT_REG_SET_BIT(DPORT_APP_CACHE_CTRL1_REG, DPORT_APP_CACHE_MMU_IA_CLR);
-    mmu_init(1);
-    DPORT_REG_CLR_BIT(DPORT_APP_CACHE_CTRL1_REG, DPORT_APP_CACHE_MMU_IA_CLR);
-    /* (above steps probably unnecessary for most serial bootloader
-       usage, all that's absolutely needed is that we unmask DROM0
-       cache on the following two lines - normal ROM boot exits with
-       DROM0 cache unmasked, but serial bootloader exits with it
-       masked. However can't hurt to be thorough and reset
-       everything.)
-
-       The lines which manipulate DPORT_APP_CACHE_MMU_IA_CLR bit are
-       necessary to work around a hardware bug.
-    */
-    DPORT_REG_CLR_BIT(DPORT_PRO_CACHE_CTRL1_REG, DPORT_PRO_CACHE_MASK_DROM0);
-    DPORT_REG_CLR_BIT(DPORT_APP_CACHE_CTRL1_REG, DPORT_APP_CACHE_MASK_DROM0);
-
-    if(bootloader_main() != ESP_OK){
+esp_err_t bootloader_read_bootloader_header(void)
+{
+    /* load bootloader image header */
+    if (bootloader_flash_read(ESP_BOOTLOADER_OFFSET, &bootloader_image_hdr, sizeof(esp_image_header_t), true) != ESP_OK) {
+        ESP_LOGE(TAG, "failed to load bootloader image header!");
         return ESP_FAIL;
     }
     return ESP_OK;
 }
 
-static esp_err_t bootloader_main()
+esp_err_t bootloader_check_bootloader_validity(void)
 {
-    bootloader_common_vddsdio_configure();
-    /* Read and keep flash ID, for further use. */
-    g_rom_flashchip.device_id = bootloader_read_flash_id();
-    /* Check and run XMC startup flow */
-    if (bootloader_flash_xmc_startup() != ESP_OK) {
-        ESP_LOGE(TAG, "failed when running XMC startup flow, reboot!");
-        return ESP_FAIL;
-    }
-
-    esp_image_header_t fhdr;
-    if (bootloader_flash_read(ESP_BOOTLOADER_OFFSET, &fhdr, sizeof(esp_image_header_t), true) != ESP_OK) {
-        ESP_LOGE(TAG, "failed to load bootloader header!");
-        return ESP_FAIL;
-    }
-
-    /* Check chip ID and minimum chip revision that supported by this image */
+    /* read chip revision from efuse */
     uint8_t revision = bootloader_common_get_chip_revision();
-    ESP_LOGI(TAG, "Chip Revision: %d", revision);
-    if (bootloader_common_check_chip_validity(&fhdr, ESP_IMAGE_BOOTLOADER) != ESP_OK) {
+    ESP_LOGI(TAG, "chip revision: %d", revision);
+    /* compare with the one set in bootloader image header */
+    if (bootloader_common_check_chip_validity(&bootloader_image_hdr, ESP_IMAGE_BOOTLOADER) != ESP_OK) {
         return ESP_FAIL;
     }
+    return ESP_OK;
+}
 
-    bootloader_init_flash_configure(&fhdr);
-#if (CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ == 240)
-    //Check if ESP32 is rated for a CPU frequency of 160MHz only
-    if (REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_RATED) &&
-        REG_GET_BIT(EFUSE_BLK0_RDATA3_REG, EFUSE_RD_CHIP_CPU_FREQ_LOW)) {
-        ESP_LOGE(TAG, "Chip CPU frequency rated for 160MHz. Modify CPU frequency in menuconfig");
-        return ESP_FAIL;
-    }
-#endif
-    bootloader_clock_configure();
-    uart_console_configure();
-    wdt_reset_check();
-    ESP_LOGI(TAG, "ESP-IDF %s 2nd stage bootloader", IDF_VER);
-
-    ESP_LOGI(TAG, "compile time " __TIME__ );
-    ets_set_appcpu_boot_addr(0);
+void bootloader_config_wdt(void)
+{
+    /*
+     * At this point, the flashboot protection of RWDT and MWDT0 will have been
+     * automatically enabled. We can disable flashboot protection as it's not
+     * needed anymore. If configured to do so, we also initialize the RWDT to
+     * protect the remainder of the bootloader process.
+     */
+    //Disable RWDT flashboot protection.
+    wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
+    wdt_hal_write_protect_disable(&rtc_wdt_ctx);
+    wdt_hal_set_flashboot_en(&rtc_wdt_ctx, false);
+    wdt_hal_write_protect_enable(&rtc_wdt_ctx);
 
 #ifdef CONFIG_BOOTLOADER_WDT_ENABLE
+    //Initialize and start RWDT to protect the  for bootloader if configured to do so
     ESP_LOGD(TAG, "Enabling RTCWDT(%d ms)", CONFIG_BOOTLOADER_WDT_TIME_MS);
-    rtc_wdt_protect_off();
-    rtc_wdt_disable();
-    rtc_wdt_set_length_of_reset_signal(RTC_WDT_SYS_RESET_SIG, RTC_WDT_LENGTH_3_2us);
-    rtc_wdt_set_length_of_reset_signal(RTC_WDT_CPU_RESET_SIG, RTC_WDT_LENGTH_3_2us);
-    rtc_wdt_set_stage(RTC_WDT_STAGE0, RTC_WDT_STAGE_ACTION_RESET_RTC);
-    rtc_wdt_set_time(RTC_WDT_STAGE0, CONFIG_BOOTLOADER_WDT_TIME_MS);
-    rtc_wdt_enable();
-    rtc_wdt_protect_on();
-#else
-    /* disable watch dog here */
-    rtc_wdt_disable();
-#endif
-    REG_SET_FIELD(TIMG_WDTWPROTECT_REG(0), TIMG_WDT_WKEY,  TIMG_WDT_WKEY_VALUE);
-    REG_CLR_BIT( TIMG_WDTCONFIG0_REG(0), TIMG_WDT_FLASHBOOT_MOD_EN );
-
-#ifndef CONFIG_SPI_FLASH_ROM_DRIVER_PATCH
-    const uint32_t spiconfig = ets_efuse_get_spiconfig();
-    if(spiconfig != EFUSE_SPICONFIG_SPI_DEFAULTS && spiconfig != EFUSE_SPICONFIG_HSPI_DEFAULTS) {
-        ESP_LOGE(TAG, "SPI flash pins are overridden. \"Enable SPI flash ROM driver patched functions\" must be enabled in menuconfig");
-        return ESP_FAIL;
-    }
+    wdt_hal_init(&rtc_wdt_ctx, WDT_RWDT, 0, false);
+    uint32_t stage_timeout_ticks = (uint32_t)((uint64_t)CONFIG_BOOTLOADER_WDT_TIME_MS * rtc_clk_slow_freq_get_hz() / 1000);
+    wdt_hal_write_protect_disable(&rtc_wdt_ctx);
+    wdt_hal_config_stage(&rtc_wdt_ctx, WDT_STAGE0, stage_timeout_ticks, WDT_STAGE_ACTION_RESET_RTC);
+    wdt_hal_enable(&rtc_wdt_ctx);
+    wdt_hal_write_protect_enable(&rtc_wdt_ctx);
 #endif
 
-    bootloader_flash_unlock();
+    //Disable MWDT0 flashboot protection. But only after we've enabled the RWDT first so that there's not gap in WDT protection.
+    wdt_hal_context_t wdt_ctx = {.inst = WDT_MWDT0, .mwdt_dev = &TIMERG0};
+    wdt_hal_write_protect_disable(&wdt_ctx);
+    wdt_hal_set_flashboot_en(&wdt_ctx, false);
+    wdt_hal_write_protect_enable(&wdt_ctx);
+}
 
+void bootloader_enable_random(void)
+{
     ESP_LOGI(TAG, "Enabling RNG early entropy source...");
     bootloader_random_enable();
-
-#if CONFIG_ESPTOOLPY_FLASHMODE_QIO || CONFIG_ESPTOOLPY_FLASHMODE_QOUT
-    bootloader_enable_qio_mode();
-#endif
-
-    print_flash_info(&fhdr);
-
-    update_flash_config(&fhdr);
-    return ESP_OK;
 }
 
-static void update_flash_config(const esp_image_header_t* pfhdr)
+void bootloader_print_banner(void)
 {
-    uint32_t size;
-    switch(pfhdr->spi_size) {
-        case ESP_IMAGE_FLASH_SIZE_1MB:
-            size = 1;
-            break;
-        case ESP_IMAGE_FLASH_SIZE_2MB:
-            size = 2;
-            break;
-        case ESP_IMAGE_FLASH_SIZE_4MB:
-            size = 4;
-            break;
-        case ESP_IMAGE_FLASH_SIZE_8MB:
-            size = 8;
-            break;
-        case ESP_IMAGE_FLASH_SIZE_16MB:
-            size = 16;
-            break;
-        default:
-            size = 2;
-    }
-    Cache_Read_Disable( 0 );
-    // Set flash chip size
-    esp_rom_spiflash_config_param(g_rom_flashchip.device_id, size * 0x100000, 0x10000, 0x1000, 0x100, 0xffff);
-    // TODO: set mode
-    // TODO: set frequency
-    Cache_Flush(0);
-    Cache_Read_Enable( 0 );
-}
-
-static void print_flash_info(const esp_image_header_t* phdr)
-{
-#if (BOOT_LOG_LEVEL >= BOOT_LOG_LEVEL_NOTICE)
-
-    ESP_LOGD(TAG, "magic %02x", phdr->magic );
-    ESP_LOGD(TAG, "segments %02x", phdr->segment_count );
-    ESP_LOGD(TAG, "spi_mode %02x", phdr->spi_mode );
-    ESP_LOGD(TAG, "spi_speed %02x", phdr->spi_speed );
-    ESP_LOGD(TAG, "spi_size %02x", phdr->spi_size );
-
-    const char* str;
-    switch ( phdr->spi_speed ) {
-    case ESP_IMAGE_SPI_SPEED_40M:
-        str = "40MHz";
-        break;
-    case ESP_IMAGE_SPI_SPEED_26M:
-        str = "26.7MHz";
-        break;
-    case ESP_IMAGE_SPI_SPEED_20M:
-        str = "20MHz";
-        break;
-    case ESP_IMAGE_SPI_SPEED_80M:
-        str = "80MHz";
-        break;
-    default:
-        str = "20MHz";
-        break;
-    }
-    ESP_LOGI(TAG, "SPI Speed      : %s", str );
-
-    /* SPI mode could have been set to QIO during boot already,
-       so test the SPI registers not the flash header */
-    uint32_t spi_ctrl = REG_READ(SPI_CTRL_REG(0));
-    if (spi_ctrl & SPI_FREAD_QIO) {
-        str = "QIO";
-    } else if (spi_ctrl & SPI_FREAD_QUAD) {
-        str = "QOUT";
-    } else if (spi_ctrl & SPI_FREAD_DIO) {
-        str = "DIO";
-    } else if (spi_ctrl & SPI_FREAD_DUAL) {
-        str = "DOUT";
-    } else if (spi_ctrl & SPI_FASTRD_MODE) {
-        str = "FAST READ";
-    } else {
-        str = "SLOW READ";
-    }
-    ESP_LOGI(TAG, "SPI Mode       : %s", str );
-
-    switch ( phdr->spi_size ) {
-    case ESP_IMAGE_FLASH_SIZE_1MB:
-        str = "1MB";
-        break;
-    case ESP_IMAGE_FLASH_SIZE_2MB:
-        str = "2MB";
-        break;
-    case ESP_IMAGE_FLASH_SIZE_4MB:
-        str = "4MB";
-        break;
-    case ESP_IMAGE_FLASH_SIZE_8MB:
-        str = "8MB";
-        break;
-    case ESP_IMAGE_FLASH_SIZE_16MB:
-        str = "16MB";
-        break;
-    default:
-        str = "2MB";
-        break;
-    }
-    ESP_LOGI(TAG, "SPI Flash Size : %s", str );
-#endif
-}
-
-/*
- * Bootloader reads SPI configuration from bin header, so that
- * the burning configuration can be different with compiling configuration.
- */
-static void IRAM_ATTR bootloader_init_flash_configure(const esp_image_header_t* pfhdr)
-{
-    bootloader_flash_gpio_config(pfhdr);
-    bootloader_flash_dummy_config(pfhdr);
-    bootloader_flash_cs_timing_config();
-}
-
-static void uart_console_configure(void)
-{
-#if CONFIG_ESP_CONSOLE_UART_NONE
-    ets_install_putc1(NULL);
-    ets_install_putc2(NULL);
-#else // CONFIG_ESP_CONSOLE_UART_NONE
-    const int uart_num = CONFIG_ESP_CONSOLE_UART_NUM;
-
-    uartAttach();
-    ets_install_uart_printf();
-
-    // Wait for UART FIFO to be empty.
-    uart_tx_wait_idle(0);
-
-#if CONFIG_ESP_CONSOLE_UART_CUSTOM
-    // Some constants to make the following code less upper-case
-    const int uart_tx_gpio = CONFIG_ESP_CONSOLE_UART_TX_GPIO;
-    const int uart_rx_gpio = CONFIG_ESP_CONSOLE_UART_RX_GPIO;
-    // Switch to the new UART (this just changes UART number used for
-    // ets_printf in ROM code).
-    uart_tx_switch(uart_num);
-    // If console is attached to UART1 or if non-default pins are used,
-    // need to reconfigure pins using GPIO matrix
-    if (uart_num != 0 || uart_tx_gpio != 1 || uart_rx_gpio != 3) {
-        // Change pin mode for GPIO1/3 from UART to GPIO
-        PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD_GPIO3);
-        PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0TXD_U, FUNC_U0TXD_GPIO1);
-        // Route GPIO signals to/from pins
-        // (arrays should be optimized away by the compiler)
-        const uint32_t tx_idx_list[3] = { U0TXD_OUT_IDX, U1TXD_OUT_IDX, U2TXD_OUT_IDX };
-        const uint32_t rx_idx_list[3] = { U0RXD_IN_IDX, U1RXD_IN_IDX, U2RXD_IN_IDX };
-        const uint32_t uart_reset[3] = { DPORT_UART_RST, DPORT_UART1_RST, DPORT_UART2_RST };
-        const uint32_t tx_idx = tx_idx_list[uart_num];
-        const uint32_t rx_idx = rx_idx_list[uart_num];
-
-        PIN_INPUT_ENABLE(GPIO_PIN_MUX_REG[uart_rx_gpio]);
-        gpio_pad_pullup(uart_rx_gpio);
-
-        gpio_matrix_out(uart_tx_gpio, tx_idx, 0, 0);
-        gpio_matrix_in(uart_rx_gpio, rx_idx, 0);
-
-        DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, uart_reset[uart_num]);
-        DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, uart_reset[uart_num]);
-    }
-#endif // CONFIG_ESP_CONSOLE_UART_CUSTOM
-
-    // Set configured UART console baud rate
-    const int uart_baud = CONFIG_ESP_CONSOLE_UART_BAUDRATE;
-    uart_div_modify(uart_num, (rtc_clk_apb_freq_get() << 4) / uart_baud);
-
-#endif // CONFIG_ESP_CONSOLE_UART_NONE
-}
-
-static void wdt_reset_cpu0_info_enable(void)
-{
-    //We do not reset core1 info here because it didn't work before cpu1 was up. So we put it into call_start_cpu1.
-    DPORT_REG_SET_BIT(DPORT_PRO_CPU_RECORD_CTRL_REG, DPORT_PRO_CPU_PDEBUG_ENABLE | DPORT_PRO_CPU_RECORD_ENABLE);
-    DPORT_REG_CLR_BIT(DPORT_PRO_CPU_RECORD_CTRL_REG, DPORT_PRO_CPU_RECORD_ENABLE);
-}
-
-static void wdt_reset_info_dump(int cpu)
-{
-    uint32_t inst = 0, pid = 0, stat = 0, data = 0, pc = 0,
-             lsstat = 0, lsaddr = 0, lsdata = 0, dstat = 0;
-    const char *cpu_name = cpu ? "APP" : "PRO";
-
-    if (cpu == 0) {
-        stat    = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_STATUS_REG);
-        pid     = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PID_REG);
-        inst    = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGINST_REG);
-        dstat   = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGSTATUS_REG);
-        data    = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGDATA_REG);
-        pc      = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGPC_REG);
-        lsstat  = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGLS0STAT_REG);
-        lsaddr  = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGLS0ADDR_REG);
-        lsdata  = DPORT_REG_READ(DPORT_PRO_CPU_RECORD_PDEBUGLS0DATA_REG);
-
-    } else {
-        stat    = DPORT_REG_READ(DPORT_APP_CPU_RECORD_STATUS_REG);
-        pid     = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PID_REG);
-        inst    = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGINST_REG);
-        dstat   = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGSTATUS_REG);
-        data    = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGDATA_REG);
-        pc      = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGPC_REG);
-        lsstat  = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGLS0STAT_REG);
-        lsaddr  = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGLS0ADDR_REG);
-        lsdata  = DPORT_REG_READ(DPORT_APP_CPU_RECORD_PDEBUGLS0DATA_REG);
-    }
-    if (DPORT_RECORD_PDEBUGINST_SZ(inst) == 0 &&
-        DPORT_RECORD_PDEBUGSTATUS_BBCAUSE(dstat) == DPORT_RECORD_PDEBUGSTATUS_BBCAUSE_WAITI) {
-        ESP_LOGW(TAG, "WDT reset info: %s CPU PC=0x%x (waiti mode)", cpu_name, pc);
-    } else {
-        ESP_LOGW(TAG, "WDT reset info: %s CPU PC=0x%x", cpu_name, pc);
-    }
-    ESP_LOGD(TAG, "WDT reset info: %s CPU STATUS        0x%08x", cpu_name, stat);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PID           0x%08x", cpu_name, pid);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGINST    0x%08x", cpu_name, inst);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGSTATUS  0x%08x", cpu_name, dstat);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGDATA    0x%08x", cpu_name, data);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGPC      0x%08x", cpu_name, pc);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGLS0STAT 0x%08x", cpu_name, lsstat);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGLS0ADDR 0x%08x", cpu_name, lsaddr);
-    ESP_LOGD(TAG, "WDT reset info: %s CPU PDEBUGLS0DATA 0x%08x", cpu_name, lsdata);
-}
-
-static void wdt_reset_check(void)
-{
-    int wdt_rst = 0;
-    RESET_REASON rst_reas[2];
-
-    rst_reas[0] = rtc_get_reset_reason(0);
-    rst_reas[1] = rtc_get_reset_reason(1);
-    if (rst_reas[0] == RTCWDT_SYS_RESET || rst_reas[0] == TG0WDT_SYS_RESET || rst_reas[0] == TG1WDT_SYS_RESET ||
-        rst_reas[0] == TGWDT_CPU_RESET  || rst_reas[0] == RTCWDT_CPU_RESET) {
-        ESP_LOGW(TAG, "PRO CPU has been reset by WDT.");
-        wdt_rst = 1;
-    }
-    if (rst_reas[1] == RTCWDT_SYS_RESET || rst_reas[1] == TG0WDT_SYS_RESET || rst_reas[1] == TG1WDT_SYS_RESET ||
-        rst_reas[1] == TGWDT_CPU_RESET  || rst_reas[1] == RTCWDT_CPU_RESET) {
-        ESP_LOGW(TAG, "APP CPU has been reset by WDT.");
-        wdt_rst = 1;
-    }
-    if (wdt_rst) {
-        // if reset by WDT dump info from trace port
-        wdt_reset_info_dump(0);
-        wdt_reset_info_dump(1);
-    }
-    wdt_reset_cpu0_info_enable();
+    ESP_LOGI(TAG, "ESP-IDF %s 2nd stage bootloader", IDF_VER);
+    ESP_LOGI(TAG, "compile time " __TIME__);
 }
 
 void __assert_func(const char *file, int line, const char *func, const char *expr)
 {
     ESP_LOGE(TAG, "Assert failed in %s, %s:%d (%s)", func, file, line, expr);
-    while(1) {}
-}
-
-void abort()
-{
-#if !CONFIG_ESP32_PANIC_SILENT_REBOOT
-    ets_printf("abort() was called at PC 0x%08x\r\n", (intptr_t)__builtin_return_address(0) - 3);
-#endif
-    if (esp_cpu_in_ocd_debug_mode()) {
-        __asm__ ("break 0,0");
+    while (1) {
     }
-    while(1) {}
 }

components/bootloader_support/src/bootloader_mem.c

@@ -0,0 +1,48 @@
+// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <stdbool.h>
+
+#include "xtensa/config/core.h"
+#include "hal/cpu_hal.h"
+#include "hal/mpu_hal.h"
+#include "hal/mpu_types.h"
+#include "soc/mpu_caps.h"
+#include "bootloader_mem.h"
+#include "xt_instr_macros.h"
+#include "xtensa/config/specreg.h"
+
+static inline void cpu_configure_region_protection(void)
+{
+    /* Currently, the only supported chips esp32 and esp32s2
+     * have the same configuration. Move this to the port layer once
+     * more chips with different configurations are supported.
+     * 
+     * Both chips have the address space divided into 8 regions, 512MB each.
+     */
+    const int illegal_regions[] = {0, 4, 5, 6, 7}; // 0x00000000, 0x80000000, 0xa0000000, 0xc0000000, 0xe0000000
+    for (int i = 0; i < sizeof(illegal_regions) / sizeof(illegal_regions[0]); ++i) {
+        mpu_hal_set_region_access(illegal_regions[i], MPU_REGION_ILLEGAL);
+    }
+
+    mpu_hal_set_region_access(1, MPU_REGION_RW); // 0x20000000
+}
+
+void bootloader_init_mem(void)
+{
+    cpu_hal_init_hwloop();
+
+    // protect memory region
+    cpu_configure_region_protection();
+}

components/bootloader_support/src/bootloader_random.c

@@ -1,4 +1,4 @@
-// Copyright 2010-2016 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2010-2020 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,18 +11,14 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+#include "sdkconfig.h"
 #include "bootloader_random.h"
 #include "soc/cpu.h"
 #include "soc/wdev_reg.h"
-#include "soc/rtc_periph.h"
-#include "soc/sens_periph.h"
-#include "soc/syscon_periph.h"
-#include "soc/dport_reg.h"
-#include "soc/i2s_periph.h"
-#include "esp_log.h"
 
 #ifndef BOOTLOADER_BUILD
 #include "esp_system.h"
+#include "driver/periph_ctrl.h"
 
 void bootloader_fill_random(void *buffer, size_t length)
 {
@@ -52,97 +48,9 @@ void bootloader_fill_random(void *buffer, size_t length)
             do {
                 random ^= REG_READ(WDEV_RND_REG);
                 RSR(CCOUNT, now);
-            } while(now - start < 80*32*2); /* extra factor of 2 is precautionary */
+            } while (now - start < 80 * 32 * 2); /* extra factor of 2 is precautionary */
         }
-
         buffer_bytes[i] = random >> ((i % 4) * 8);
     }
 }
 #endif // BOOTLOADER_BUILD
-
-void bootloader_random_enable(void)
-{
-    /* Ensure the hardware RNG is enabled following a soft reset.  This should always be the case already (this clock is
-       never disabled while the CPU is running), this is a "belts and braces" type check.
-     */
-    DPORT_SET_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, DPORT_WIFI_CLK_RNG_EN);
-
-    /* Enable SAR ADC in test mode to feed ADC readings of the 1.1V
-       reference via I2S into the RNG entropy input.
-
-       Note: I2S requires the PLL to be running, so the call to rtc_set_cpu_freq(CPU_80M)
-       in early bootloader startup must have been made.
-    */
-    SET_PERI_REG_BITS(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_DTEST_RTC, 2, RTC_CNTL_DTEST_RTC_S);
-    SET_PERI_REG_MASK(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_ENT_RTC);
-    SET_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_SAR2_EN_TEST);
-
-    DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_I2S0_CLK_EN);
-    CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_ULP_CP_FORCE_START_TOP);
-    CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_ULP_CP_START_TOP);
-    // Test pattern configuration byte 0xAD:
-    //--[7:4] channel_sel: 10-->en_test
-    //--[3:2] bit_width  : 3-->12bit
-    //--[1:0] atten      : 1-->3dB attenuation
-    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB1_REG, 0xADADADAD);
-    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB2_REG, 0xADADADAD);
-    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB3_REG, 0xADADADAD);
-    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB4_REG, 0xADADADAD);
-
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 3, SENS_FORCE_XPD_SAR_S);
-    SET_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DIG_FORCE);
-    SET_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DIG_FORCE);
-    SET_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR2_MUX);
-    SET_PERI_REG_BITS(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR_CLK_DIV, 4, SYSCON_SARADC_SAR_CLK_DIV_S);
-
-    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_RSTB_WAIT, 8, SYSCON_SARADC_RSTB_WAIT_S); /* was 1 */
-    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_START_WAIT, 10, SYSCON_SARADC_START_WAIT_S);
-    SET_PERI_REG_BITS(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_WORK_MODE, 0, SYSCON_SARADC_WORK_MODE_S);
-    SET_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR_SEL);
-    CLEAR_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_DATA_SAR_SEL);
-
-    SET_PERI_REG_BITS(I2S_SAMPLE_RATE_CONF_REG(0), I2S_RX_BCK_DIV_NUM, 20, I2S_RX_BCK_DIV_NUM_S);
-
-    SET_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG,SYSCON_SARADC_DATA_TO_I2S);
-
-    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_CAMERA_EN);
-    SET_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_LCD_EN);
-    SET_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE);
-    SET_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE_TEST_EN);
-    SET_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_START);
-}
-
-void bootloader_random_disable(void)
-{
-    /* Reset some i2s configuration (possibly redundant as we reset entire
-       I2S peripheral further down). */
-    CLEAR_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_START);
-    SET_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_RESET);
-    CLEAR_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_RESET);
-    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_CAMERA_EN);
-    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_LCD_EN);
-    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE_TEST_EN);
-    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE);
-
-    /* Disable i2s clock */
-    DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_I2S0_CLK_EN);
-
-    /* Restore SYSCON mode registers */
-    CLEAR_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DIG_FORCE);
-    CLEAR_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DIG_FORCE);
-
-    /* Restore SAR ADC mode */
-    CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_SAR2_EN_TEST);
-    CLEAR_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR2_MUX
-                        | SYSCON_SARADC_SAR_SEL | SYSCON_SARADC_DATA_TO_I2S);
-    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
-    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_START_WAIT, 8, SYSCON_SARADC_START_WAIT_S);
-
-    /* Reset i2s peripheral */
-    DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_I2S0_RST);
-    DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_I2S0_RST);
-
-    /* Disable pull supply voltage to SAR ADC */
-    CLEAR_PERI_REG_MASK(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_ENT_RTC);
-    SET_PERI_REG_BITS(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_DTEST_RTC, 0, RTC_CNTL_DTEST_RTC_S);
-}

components/bootloader_support/src/bootloader_random_esp32.c

@@ -0,0 +1,128 @@
+// Copyright 2016-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "sdkconfig.h"
+#include "bootloader_random.h"
+#include "soc/rtc_periph.h"
+#include "soc/sens_periph.h"
+#include "soc/syscon_periph.h"
+#include "soc/dport_reg.h"
+#include "soc/i2s_periph.h"
+#include "esp_log.h"
+#include "soc/io_mux_reg.h"
+
+#ifndef BOOTLOADER_BUILD
+#include "driver/periph_ctrl.h"
+#endif
+
+void bootloader_random_enable(void)
+{
+    /* Ensure the hardware RNG is enabled following a soft reset.  This should always be the case already (this clock is
+       never disabled while the CPU is running), this is a "belts and braces" type check.
+     */
+#ifdef BOOTLOADER_BUILD
+    DPORT_SET_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, DPORT_WIFI_CLK_RNG_EN);
+#else
+    periph_module_enable(PERIPH_RNG_MODULE);
+#endif // BOOTLOADER_BUILD
+
+    /* Enable SAR ADC in test mode to feed ADC readings of the 1.1V
+       reference via I2S into the RNG entropy input.
+
+       Note: I2S requires the PLL to be running, so the call to rtc_set_cpu_freq(CPU_80M)
+       in early bootloader startup must have been made.
+    */
+    SET_PERI_REG_BITS(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_DTEST_RTC, 2, RTC_CNTL_DTEST_RTC_S);
+    SET_PERI_REG_MASK(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_ENT_RTC);
+    SET_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_SAR2_EN_TEST);
+
+#ifdef BOOTLOADER_BUILD
+    DPORT_SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_I2S0_CLK_EN);
+#else
+    periph_module_enable(PERIPH_I2S0_MODULE);
+#endif // BOOTLOADER_BUILD
+    CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_ULP_CP_FORCE_START_TOP);
+    CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_ULP_CP_START_TOP);
+
+    // Test pattern configuration byte 0xAD:
+    //--[7:4] channel_sel: 10-->en_test
+    //--[3:2] bit_width  : 3-->12bit
+    //--[1:0] atten      : 1-->3dB attenuation
+    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB1_REG, 0xADADADAD);
+    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB2_REG, 0xADADADAD);
+    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB3_REG, 0xADADADAD);
+    WRITE_PERI_REG(SYSCON_SARADC_SAR2_PATT_TAB4_REG, 0xADADADAD);
+    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 3, SENS_FORCE_XPD_SAR_S);
+    SET_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DIG_FORCE);
+    SET_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DIG_FORCE);
+
+    SET_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR2_MUX);
+    SET_PERI_REG_BITS(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR_CLK_DIV, 4, SYSCON_SARADC_SAR_CLK_DIV_S);
+    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_RSTB_WAIT, 8, SYSCON_SARADC_RSTB_WAIT_S); /* was 1 */
+    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_START_WAIT, 10, SYSCON_SARADC_START_WAIT_S);
+    SET_PERI_REG_BITS(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_WORK_MODE, 0, SYSCON_SARADC_WORK_MODE_S);
+    SET_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR_SEL);
+    CLEAR_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_DATA_SAR_SEL);
+    SET_PERI_REG_BITS(I2S_SAMPLE_RATE_CONF_REG(0), I2S_RX_BCK_DIV_NUM, 20, I2S_RX_BCK_DIV_NUM_S);
+    SET_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_DATA_TO_I2S);
+
+    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_CAMERA_EN);
+    SET_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_LCD_EN);
+    SET_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE);
+    SET_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE_TEST_EN);
+    SET_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_START);
+}
+
+void bootloader_random_disable(void)
+{
+    /* Reset some i2s configuration (possibly redundant as we reset entire
+       I2S peripheral further down). */
+    CLEAR_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_START);
+    SET_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_RESET);
+    CLEAR_PERI_REG_MASK(I2S_CONF_REG(0), I2S_RX_RESET);
+    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_CAMERA_EN);
+    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_LCD_EN);
+    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE_TEST_EN);
+    CLEAR_PERI_REG_MASK(I2S_CONF2_REG(0), I2S_DATA_ENABLE);
+
+    /* Disable i2s clock */
+#ifdef BOOTLOADER_BUILD
+    DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_CLK_EN_REG, DPORT_I2S0_CLK_EN);
+#else
+    periph_module_disable(PERIPH_I2S0_MODULE);
+#endif // BOOTLOADER_BUILD
+
+    /* Restore SYSCON mode registers */
+    CLEAR_PERI_REG_MASK(SENS_SAR_READ_CTRL_REG, SENS_SAR1_DIG_FORCE);
+    CLEAR_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DIG_FORCE);
+
+    /* Restore SAR ADC mode */
+    CLEAR_PERI_REG_MASK(SENS_SAR_START_FORCE_REG, SENS_SAR2_EN_TEST);
+    CLEAR_PERI_REG_MASK(SYSCON_SARADC_CTRL_REG, SYSCON_SARADC_SAR2_MUX
+                        | SYSCON_SARADC_SAR_SEL | SYSCON_SARADC_DATA_TO_I2S);
+    SET_PERI_REG_BITS(SENS_SAR_MEAS_WAIT2_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
+
+    SET_PERI_REG_BITS(SYSCON_SARADC_FSM_REG, SYSCON_SARADC_START_WAIT, 8, SYSCON_SARADC_START_WAIT_S);
+
+    /* Reset i2s peripheral */
+#ifdef BOOTLOADER_BUILD
+    DPORT_SET_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_I2S0_RST);
+    DPORT_CLEAR_PERI_REG_MASK(DPORT_PERIP_RST_EN_REG, DPORT_I2S0_RST);
+#else
+    periph_module_reset(PERIPH_I2S0_MODULE);
+#endif
+
+    /* Disable pull supply voltage to SAR ADC */
+    CLEAR_PERI_REG_MASK(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_ENT_RTC);
+    SET_PERI_REG_BITS(RTC_CNTL_TEST_MUX_REG, RTC_CNTL_DTEST_RTC, 0, RTC_CNTL_DTEST_RTC_S);
+}

components/bootloader_support/src/bootloader_random_esp32s2.c

@@ -0,0 +1,106 @@
+// Copyright 2019-2020 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+#include "sdkconfig.h"
+#include "bootloader_random.h"
+#include "soc/rtc_periph.h"
+#include "soc/sens_periph.h"
+#include "soc/syscon_periph.h"
+#include "soc/dport_reg.h"
+#include "soc/i2s_periph.h"
+#include "esp_log.h"
+#include "soc/io_mux_reg.h"
+#include "soc/apb_saradc_reg.h"
+#include "regi2c_ctrl.h"
+#include "hal/adc_ll.h"
+
+#ifndef BOOTLOADER_BUILD
+#include "driver/periph_ctrl.h"
+#endif
+
+void bootloader_random_enable(void)
+{
+    /* Ensure the Wifi clock for RNG modiule is enabled following a soft reset.  This should always be the case already
+       (this clock is never disabled while the CPU is running), this is a "belt and braces" type check.
+     */
+#ifdef BOOTLOADER_BUILD
+    DPORT_SET_PERI_REG_MASK(DPORT_WIFI_CLK_EN_REG, DPORT_WIFI_CLK_RNG_EN);
+#else
+    periph_module_enable(PERIPH_RNG_MODULE);
+#endif // BOOTLOADER_BUILD
+
+    // Enable 8M clock source for RNG (this is actually enough to produce strong random results,
+    // but enabling the SAR ADC as well adds some insurance.)
+    REG_SET_BIT(RTC_CNTL_CLK_CONF_REG, RTC_CNTL_DIG_CLK8M_EN);
+
+    // Enable SAR ADC to read a disconnected input for additional entropy
+    SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN0_REG,DPORT_APB_SARADC_CLK_EN);
+
+    REG_SET_FIELD(APB_SARADC_APB_ADC_CLKM_CONF_REG, APB_SARADC_CLK_SEL, 2);
+
+    CLEAR_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_SAR_I2C_FORCE_PD_M);
+    SET_PERI_REG_MASK(RTC_CNTL_ANA_CONF_REG, RTC_CNTL_SAR_I2C_FORCE_PU_M);
+    CLEAR_PERI_REG_MASK(ANA_CONFIG_REG, BIT(18));
+    SET_PERI_REG_MASK(ANA_CONFIG2_REG, BIT(16));
+
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_DREF_ADDR, 0x4);
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR2_DREF_ADDR, 0x4);
+
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SARADC_ENCAL_REF_ADDR, 1);
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SARADC_ENT_TSENS_ADDR, 1);
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SARADC_ENT_RTC_ADDR, 0);
+
+    REG_SET_FIELD(APB_SARADC_CTRL_REG, APB_SARADC_SAR1_PATT_LEN, 0);
+    WRITE_PERI_REG(APB_SARADC_SAR1_PATT_TAB1_REG,0xafffffff);    // set adc1 channel & bitwidth & atten
+
+    REG_SET_FIELD(APB_SARADC_CTRL_REG, APB_SARADC_SAR2_PATT_LEN, 0);
+    WRITE_PERI_REG(APB_SARADC_SAR2_PATT_TAB1_REG,0xafffffff); //set adc2 channel & bitwidth & atten
+
+    SET_PERI_REG_MASK(SENS_SAR_MEAS1_MUX_REG,SENS_SAR1_DIG_FORCE);
+
+    REG_SET_FIELD(APB_SARADC_CTRL_REG,APB_SARADC_WORK_MODE, 1);
+
+    CLEAR_PERI_REG_MASK(APB_SARADC_CTRL2_REG,APB_SARADC_MEAS_NUM_LIMIT);
+
+    REG_SET_FIELD(SENS_SAR_POWER_XPD_SAR_REG, SENS_FORCE_XPD_SAR, 3);
+
+    SET_PERI_REG_MASK(APB_SARADC_CTRL2_REG,APB_SARADC_TIMER_SEL);
+
+    REG_SET_FIELD(APB_SARADC_CTRL2_REG, APB_SARADC_TIMER_TARGET, 100);
+
+    CLEAR_PERI_REG_MASK(APB_SARADC_CTRL_REG,APB_SARADC_START_FORCE);
+
+    SET_PERI_REG_MASK(APB_SARADC_CTRL2_REG,APB_SARADC_TIMER_EN);
+}
+
+void bootloader_random_disable(void)
+{
+    /* Restore internal I2C bus state */
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR1_DREF_ADDR, 0x1);
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SAR2_DREF_ADDR, 0x1);
+
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SARADC_ENCAL_REF_ADDR, 0);
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SARADC_ENT_TSENS_ADDR, 0);
+    REGI2C_WRITE_MASK(I2C_SAR_ADC, ADC_SARADC_ENT_RTC_ADDR, 0);
+
+    /* Restore SARADC to default mode */
+    CLEAR_PERI_REG_MASK(SENS_SAR_MEAS1_MUX_REG, SENS_SAR1_DIG_FORCE);
+    SET_PERI_REG_MASK(DPORT_PERIP_CLK_EN0_REG, DPORT_APB_SARADC_CLK_EN);
+    SET_PERI_REG_BITS(SENS_SAR_POWER_XPD_SAR_REG, SENS_FORCE_XPD_SAR, 0, SENS_FORCE_XPD_SAR_S);
+    CLEAR_PERI_REG_MASK(APB_SARADC_CTRL2_REG, APB_SARADC_TIMER_EN);
+
+    /* Note: the 8M CLK entropy source continues running even after this function is called,
+       but as mentioned above it's better to enable Wi-Fi or BT or call bootloader_random_enable()
+       in order to get a secondary entropy source.
+    */
+}

components/bootloader_support/src/bootloader_utility.c

@@ -19,6 +19,7 @@
 #include "esp_attr.h"
 #include "esp_log.h"
 
+#if CONFIG_IDF_TARGET_ESP32
 #include "esp32/rom/cache.h"
 #include "esp32/rom/efuse.h"
 #include "esp32/rom/ets_sys.h"
@@ -28,6 +29,21 @@
 #include "esp32/rom/uart.h"
 #include "esp32/rom/gpio.h"
 #include "esp32/rom/secure_boot.h"
+#elif CONFIG_IDF_TARGET_ESP32S2
+#include "esp32s2/rom/cache.h"
+#include "esp32s2/rom/efuse.h"
+#include "esp32s2/rom/ets_sys.h"
+#include "esp32s2/rom/spi_flash.h"
+#include "esp32s2/rom/crc.h"
+#include "esp32s2/rom/rtc.h"
+#include "esp32s2/rom/uart.h"
+#include "esp32s2/rom/gpio.h"
+#include "esp32s2/rom/secure_boot.h"
+#include "soc/extmem_reg.h"
+#include "soc/cache_memory.h"
+#else
+#error "Unsupported IDF_TARGET"
+#endif
 
 #include "soc/soc.h"
 #include "soc/cpu.h"
@@ -43,30 +59,31 @@
 #include "esp_secure_boot.h"
 #include "esp_flash_encrypt.h"
 #include "esp_flash_partitions.h"
-#include "bootloader_flash.h"
+#include "bootloader_flash_priv.h"
 #include "bootloader_random.h"
 #include "bootloader_config.h"
 #include "bootloader_common.h"
 #include "bootloader_utility.h"
 #include "bootloader_sha.h"
 #include "esp_efuse.h"
+#include "esp_fault.h"
 
-static const char* TAG = "boot";
+static const char *TAG = "boot";
 
 /* Reduce literal size for some generic string literals */
 #define MAP_ERR_MSG "Image contains multiple %s segments. Only the last one will be mapped."
 
 static bool ota_has_initial_contents;
 
-static void load_image(const esp_image_metadata_t* image_data);
+static void load_image(const esp_image_metadata_t *image_data);
 static void unpack_load_app(const esp_image_metadata_t *data);
 static void set_cache_and_start_app(uint32_t drom_addr,
-    uint32_t drom_load_addr,
-    uint32_t drom_size,
-    uint32_t irom_addr,
-    uint32_t irom_load_addr,
-    uint32_t irom_size,
-    uint32_t entry_addr);
+                                    uint32_t drom_load_addr,
+                                    uint32_t drom_size,
+                                    uint32_t irom_addr,
+                                    uint32_t irom_load_addr,
+                                    uint32_t irom_size,
+                                    uint32_t entry_addr);
 
 // Read ota_info partition and fill array from two otadata structures.
 static esp_err_t read_otadata(const esp_partition_pos_t *ota_info, esp_ota_select_entry_t *two_otadata)
@@ -96,7 +113,7 @@ static esp_err_t read_otadata(const esp_partition_pos_t *ota_info, esp_ota_selec
     return ESP_OK;
 }
 
-bool bootloader_utility_load_partition_table(bootloader_state_t* bs)
+bool bootloader_utility_load_partition_table(bootloader_state_t *bs)
 {
     const esp_partition_info_t *partitions;
     const char *partition_usage;
@@ -119,16 +136,16 @@ bool bootloader_utility_load_partition_table(bootloader_state_t* bs)
     ESP_LOGI(TAG, "Partition Table:");
     ESP_LOGI(TAG, "## Label            Usage          Type ST Offset   Length");
 
-    for(int i = 0; i < num_partitions; i++) {
+    for (int i = 0; i < num_partitions; i++) {
         const esp_partition_info_t *partition = &partitions[i];
         ESP_LOGD(TAG, "load partition table entry 0x%x", (intptr_t)partition);
         ESP_LOGD(TAG, "type=%x subtype=%x", partition->type, partition->subtype);
         partition_usage = "unknown";
 
         /* valid partition table */
-        switch(partition->type) {
+        switch (partition->type) {
         case PART_TYPE_APP: /* app partition */
-            switch(partition->subtype) {
+            switch (partition->subtype) {
             case PART_SUBTYPE_FACTORY: /* factory binary */
                 bs->factory = partition->pos;
                 partition_usage = "factory app";
@@ -143,15 +160,14 @@ bool bootloader_utility_load_partition_table(bootloader_state_t* bs)
                     bs->ota[partition->subtype & PART_SUBTYPE_OTA_MASK] = partition->pos;
                     ++bs->app_count;
                     partition_usage = "OTA app";
-                }
-                else {
+                } else {
                     partition_usage = "Unknown app";
                 }
                 break;
             }
             break; /* PART_TYPE_APP */
         case PART_TYPE_DATA: /* data partition */
-            switch(partition->subtype) {
+            switch (partition->subtype) {
             case PART_SUBTYPE_DATA_OTA: /* ota data */
                 bs->ota_info = partition->pos;
                 partition_usage = "OTA data";
@@ -188,7 +204,7 @@ bool bootloader_utility_load_partition_table(bootloader_state_t* bs)
 
     bootloader_munmap(partitions);
 
-    ESP_LOGI(TAG,"End of partition table");
+    ESP_LOGI(TAG, "End of partition table");
     return true;
 }
 
@@ -214,7 +230,7 @@ static esp_partition_pos_t index_to_partition(const bootloader_state_t *bs, int
 static void log_invalid_app_partition(int index)
 {
     const char *not_bootable = " is not bootable"; /* save a few string literal bytes */
-    switch(index) {
+    switch (index) {
     case FACTORY_INDEX:
         ESP_LOGE(TAG, "Factory app partition%s", not_bootable);
         break;
@@ -242,9 +258,16 @@ static esp_err_t write_otadata(esp_ota_select_entry_t *otadata, uint32_t offset,
 static bool check_anti_rollback(const esp_partition_pos_t *partition)
 {
 #ifdef CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK
-    esp_app_desc_t app_desc;
+    esp_app_desc_t app_desc = {};
     esp_err_t err = bootloader_common_get_partition_description(partition, &app_desc);
-    return err == ESP_OK && esp_efuse_check_secure_version(app_desc.secure_version) == true;
+    if (err != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to get partition description %d", err);
+        return false;
+    }
+    bool sec_ver = esp_efuse_check_secure_version(app_desc.secure_version);
+    /* Anti FI check */
+    ESP_FAULT_ASSERT(sec_ver == esp_efuse_check_secure_version(app_desc.secure_version));
+    return sec_ver;
 #else
     return true;
 #endif
@@ -257,6 +280,8 @@ static void update_anti_rollback(const esp_partition_pos_t *partition)
     esp_err_t err = bootloader_common_get_partition_description(partition, &app_desc);
     if (err == ESP_OK) {
         esp_efuse_update_secure_version(app_desc.secure_version);
+    } else {
+        ESP_LOGE(TAG, "Failed to get partition description %d", err);
     }
 }
 
@@ -317,8 +342,8 @@ int bootloader_utility_get_selected_boot_partition(const bootloader_state_t *bs)
 
 #ifndef CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK
     if ((bootloader_common_ota_select_invalid(&otadata[0]) &&
-         bootloader_common_ota_select_invalid(&otadata[1])) ||
-         bs->app_count == 0) {
+            bootloader_common_ota_select_invalid(&otadata[1])) ||
+            bs->app_count == 0) {
         ESP_LOGD(TAG, "OTA sequence numbers both empty (all-0xFF) or partition table does not have bootable ota_apps (app_count=%d)", bs->app_count);
         if (bs->factory.offset != 0) {
             ESP_LOGI(TAG, "Defaulting to factory image");
@@ -328,7 +353,7 @@ int bootloader_utility_get_selected_boot_partition(const bootloader_state_t *bs)
             boot_index = 0;
             // Try to boot from ota_0.
             if ((otadata[0].ota_seq == UINT32_MAX || otadata[0].crc != bootloader_common_ota_select_crc(&otadata[0])) &&
-                (otadata[1].ota_seq == UINT32_MAX || otadata[1].crc != bootloader_common_ota_select_crc(&otadata[1]))) {
+                    (otadata[1].ota_seq == UINT32_MAX || otadata[1].crc != bootloader_common_ota_select_crc(&otadata[1]))) {
                 // Factory is not found and both otadata are initial(0xFFFFFFFF) or incorrect crc.
                 // will set correct ota_seq.
                 ota_has_initial_contents = true;
@@ -341,7 +366,7 @@ int bootloader_utility_get_selected_boot_partition(const bootloader_state_t *bs)
     ESP_LOGI(TAG, "Secure version (from eFuse) = %d", esp_efuse_read_secure_version());
     // When CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK is enabled factory partition should not be in partition table, only two ota_app are there.
     if ((otadata[0].ota_seq == UINT32_MAX || otadata[0].crc != bootloader_common_ota_select_crc(&otadata[0])) &&
-        (otadata[1].ota_seq == UINT32_MAX || otadata[1].crc != bootloader_common_ota_select_crc(&otadata[1]))) {
+            (otadata[1].ota_seq == UINT32_MAX || otadata[1].crc != bootloader_common_ota_select_crc(&otadata[1]))) {
         ESP_LOGI(TAG, "otadata[0..1] in initial state");
         // both otadata are initial(0xFFFFFFFF) or incorrect crc.
         // will set correct ota_seq.
@@ -363,7 +388,7 @@ int bootloader_utility_get_selected_boot_partition(const bootloader_state_t *bs)
 #endif // CONFIG_BOOTLOADER_APP_ROLLBACK_ENABLE
 
 #ifdef CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK
-            if(otadata[active_otadata].ota_state == ESP_OTA_IMG_VALID) {
+            if (otadata[active_otadata].ota_state == ESP_OTA_IMG_VALID) {
                 update_anti_rollback(&bs->ota[boot_index]);
             }
 #endif // CONFIG_BOOTLOADER_APP_ANTI_ROLLBACK
@@ -416,8 +441,31 @@ static void set_actual_ota_seq(const bootloader_state_t *bs, int index)
         update_anti_rollback(&bs->ota[index]);
 #endif
     }
+#if defined( CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP ) || defined( CONFIG_BOOTLOADER_CUSTOM_RESERVE_RTC )
+    esp_partition_pos_t partition = index_to_partition(bs, index);
+    bootloader_common_update_rtc_retain_mem(&partition, true);
+#endif
 }
 
+#ifdef CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP
+void bootloader_utility_load_boot_image_from_deep_sleep(void)
+{
+    if (rtc_get_reset_reason(0) == DEEPSLEEP_RESET) {
+        esp_partition_pos_t *partition = bootloader_common_get_rtc_retain_mem_partition();
+        if (partition != NULL) {
+            esp_image_metadata_t image_data;
+            if (bootloader_load_image_no_verify(partition, &image_data) == ESP_OK) {
+                ESP_LOGI(TAG, "Fast booting app from partition at offset 0x%x", partition->offset);
+                bootloader_common_update_rtc_retain_mem(NULL, true);
+                load_image(&image_data);
+            }
+        }
+        ESP_LOGE(TAG, "Fast booting is not successful");
+        ESP_LOGI(TAG, "Try to load an app as usual with all validations");
+    }
+}
+#endif
+
 #define TRY_LOG_FORMAT "Trying partition index %d offs 0x%x size 0x%x"
 
 void bootloader_utility_load_boot_image(const bootloader_state_t *bs, int start_index)
@@ -426,7 +474,7 @@ void bootloader_utility_load_boot_image(const bootloader_state_t *bs, int start_
     esp_partition_pos_t part;
     esp_image_metadata_t image_data;
 
-    if(start_index == TEST_APP_INDEX) {
+    if (start_index == TEST_APP_INDEX) {
         if (try_load_partition(&bs->test, &image_data)) {
             load_image(&image_data);
         } else {
@@ -436,7 +484,7 @@ void bootloader_utility_load_boot_image(const bootloader_state_t *bs, int start_
     }
 
     /* work backwards from start_index, down to the factory app */
-    for(index = start_index; index >= FACTORY_INDEX; index--) {
+    for (index = start_index; index >= FACTORY_INDEX; index--) {
         part = index_to_partition(bs, index);
         if (part.size == 0) {
             continue;
@@ -450,7 +498,7 @@ void bootloader_utility_load_boot_image(const bootloader_state_t *bs, int start_
     }
 
     /* failing that work forwards from start_index, try valid OTA slots */
-    for(index = start_index + 1; index < bs->app_count; index++) {
+    for (index = start_index + 1; index < bs->app_count; index++) {
         part = index_to_partition(bs, index);
         if (part.size == 0) {
             continue;
@@ -474,7 +522,7 @@ void bootloader_utility_load_boot_image(const bootloader_state_t *bs, int start_
 }
 
 // Copy loaded segments to RAM, set up caches for mapped segments, and start application.
-static void load_image(const esp_image_metadata_t* image_data)
+static void load_image(const esp_image_metadata_t *image_data)
 {
     /**
      * Rough steps for a first boot, when encryption and secure boot are both disabled:
@@ -519,11 +567,19 @@ static void load_image(const esp_image_metadata_t* image_data)
      * then Step 6 enables secure boot.
      */
 
-#if defined(CONFIG_SECURE_BOOT_ENABLED) || defined(CONFIG_SECURE_FLASH_ENC_ENABLED)
+#if defined(CONFIG_SECURE_BOOT) || defined(CONFIG_SECURE_FLASH_ENC_ENABLED)
     esp_err_t err;
 #endif
 
-#ifdef CONFIG_SECURE_BOOT_ENABLED
+#ifdef CONFIG_SECURE_BOOT_V2_ENABLED
+    err = esp_secure_boot_v2_permanently_enable(image_data);
+    if (err != ESP_OK) {
+        ESP_LOGE(TAG, "Secure Boot v2 failed (%d)", err);
+        return;
+    }
+#endif
+
+#ifdef CONFIG_SECURE_BOOT_V1_ENABLED
     /* Steps 1 & 2 (see above for full description):
      *   1) Generate secure boot EFUSE key
      *   2) Compute digest of plaintext bootloader
@@ -550,7 +606,7 @@ static void load_image(const esp_image_metadata_t* image_data)
     }
 #endif
 
-#ifdef CONFIG_SECURE_BOOT_ENABLED
+#ifdef CONFIG_SECURE_BOOT_V1_ENABLED
     /* Step 6 (see above for full description):
      *   6) Burn EFUSE to enable secure boot
      */
@@ -571,6 +627,7 @@ static void load_image(const esp_image_metadata_t* image_data)
            so issue a system reset to ensure flash encryption
            cache resets properly */
         ESP_LOGI(TAG, "Resetting with flash encryption enabled...");
+        uart_tx_wait_idle(0);
         bootloader_reset();
     }
 #endif
@@ -582,7 +639,7 @@ static void load_image(const esp_image_metadata_t* image_data)
     unpack_load_app(image_data);
 }
 
-static void unpack_load_app(const esp_image_metadata_t* data)
+static void unpack_load_app(const esp_image_metadata_t *data)
 {
     uint32_t drom_addr = 0;
     uint32_t drom_load_addr = 0;
@@ -618,12 +675,12 @@ static void unpack_load_app(const esp_image_metadata_t* data)
 
     ESP_LOGD(TAG, "calling set_cache_and_start_app");
     set_cache_and_start_app(drom_addr,
-        drom_load_addr,
-        drom_size,
-        irom_addr,
-        irom_load_addr,
-        irom_size,
-        data->image.entry_addr);
+                            drom_load_addr,
+                            drom_size,
+                            irom_addr,
+                            irom_load_addr,
+                            irom_size,
+                            data->image.entry_addr);
 }
 
 static void set_cache_and_start_app(
@@ -637,46 +694,78 @@ static void set_cache_and_start_app(
 {
     int rc;
     ESP_LOGD(TAG, "configure drom and irom and start");
-    Cache_Read_Disable( 0 );
-    Cache_Flush( 0 );
+#if CONFIG_IDF_TARGET_ESP32
+    Cache_Read_Disable(0);
+    Cache_Flush(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    uint32_t autoload = Cache_Suspend_ICache();
+    Cache_Invalidate_ICache_All();
+#endif
 
     /* Clear the MMU entries that are already set up,
        so the new app only has the mappings it creates.
     */
+#if CONFIG_IDF_TARGET_ESP32
     for (int i = 0; i < DPORT_FLASH_MMU_TABLE_SIZE; i++) {
         DPORT_PRO_FLASH_MMU_TABLE[i] = DPORT_FLASH_MMU_TABLE_INVALID_VAL;
     }
-
+#elif CONFIG_IDF_TARGET_ESP32S2
+    for (int i = 0; i < FLASH_MMU_TABLE_SIZE; i++) {
+        FLASH_MMU_TABLE[i] = MMU_TABLE_INVALID_VAL;
+    }
+#endif
     uint32_t drom_load_addr_aligned = drom_load_addr & MMU_FLASH_MASK;
     uint32_t drom_page_count = bootloader_cache_pages_to_map(drom_size, drom_load_addr);
     ESP_LOGV(TAG, "d mmu set paddr=%08x vaddr=%08x size=%d n=%d",
-            drom_addr & MMU_FLASH_MASK, drom_load_addr_aligned, drom_size, drom_page_count);
+             drom_addr & MMU_FLASH_MASK, drom_load_addr_aligned, drom_size, drom_page_count);
+#if CONFIG_IDF_TARGET_ESP32
     rc = cache_flash_mmu_set(0, 0, drom_load_addr_aligned, drom_addr & MMU_FLASH_MASK, 64, drom_page_count);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    rc = Cache_Ibus_MMU_Set(MMU_ACCESS_FLASH, drom_load_addr & 0xffff0000, drom_addr & 0xffff0000, 64, drom_page_count, 0);
+#endif
     ESP_LOGV(TAG, "rc=%d", rc);
+#if CONFIG_IDF_TARGET_ESP32
     rc = cache_flash_mmu_set(1, 0, drom_load_addr_aligned, drom_addr & MMU_FLASH_MASK, 64, drom_page_count);
     ESP_LOGV(TAG, "rc=%d", rc);
-
+#endif
     uint32_t irom_load_addr_aligned = irom_load_addr & MMU_FLASH_MASK;
     uint32_t irom_page_count = bootloader_cache_pages_to_map(irom_size, irom_load_addr);
     ESP_LOGV(TAG, "i mmu set paddr=%08x vaddr=%08x size=%d n=%d",
-            irom_addr & MMU_FLASH_MASK, irom_load_addr_aligned, irom_size, irom_page_count);
+             irom_addr & MMU_FLASH_MASK, irom_load_addr_aligned, irom_size, irom_page_count);
+#if CONFIG_IDF_TARGET_ESP32
     rc = cache_flash_mmu_set(0, 0, irom_load_addr_aligned, irom_addr & MMU_FLASH_MASK, 64, irom_page_count);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    uint32_t iram1_used = 0;
+    if (irom_load_addr + irom_size > IRAM1_ADDRESS_LOW) {
+        iram1_used = 1;
+    }
+    if (iram1_used) {
+        rc = Cache_Ibus_MMU_Set(MMU_ACCESS_FLASH, IRAM0_ADDRESS_LOW, 0, 64, 64, 1);
+        rc = Cache_Ibus_MMU_Set(MMU_ACCESS_FLASH, IRAM1_ADDRESS_LOW, 0, 64, 64, 1);
+        REG_CLR_BIT(EXTMEM_PRO_ICACHE_CTRL1_REG, EXTMEM_PRO_ICACHE_MASK_IRAM1);
+    }
+    rc = Cache_Ibus_MMU_Set(MMU_ACCESS_FLASH, irom_load_addr & 0xffff0000, irom_addr & 0xffff0000, 64, irom_page_count, 0);
+#endif
     ESP_LOGV(TAG, "rc=%d", rc);
+#if CONFIG_IDF_TARGET_ESP32
     rc = cache_flash_mmu_set(1, 0, irom_load_addr_aligned, irom_addr & MMU_FLASH_MASK, 64, irom_page_count);
     ESP_LOGV(TAG, "rc=%d", rc);
-
     DPORT_REG_CLR_BIT( DPORT_PRO_CACHE_CTRL1_REG,
-            (DPORT_PRO_CACHE_MASK_IRAM0) | (DPORT_PRO_CACHE_MASK_IRAM1 & 0) |
-            (DPORT_PRO_CACHE_MASK_IROM0 & 0) | DPORT_PRO_CACHE_MASK_DROM0 |
-            DPORT_PRO_CACHE_MASK_DRAM1 );
-
+                       (DPORT_PRO_CACHE_MASK_IRAM0) | (DPORT_PRO_CACHE_MASK_IRAM1 & 0) |
+                       (DPORT_PRO_CACHE_MASK_IROM0 & 0) | DPORT_PRO_CACHE_MASK_DROM0 |
+                       DPORT_PRO_CACHE_MASK_DRAM1 );
     DPORT_REG_CLR_BIT( DPORT_APP_CACHE_CTRL1_REG,
-            (DPORT_APP_CACHE_MASK_IRAM0) | (DPORT_APP_CACHE_MASK_IRAM1 & 0) |
-            (DPORT_APP_CACHE_MASK_IROM0 & 0) | DPORT_APP_CACHE_MASK_DROM0 |
-            DPORT_APP_CACHE_MASK_DRAM1 );
-
-    Cache_Read_Enable( 0 );
-
+                       (DPORT_APP_CACHE_MASK_IRAM0) | (DPORT_APP_CACHE_MASK_IRAM1 & 0) |
+                       (DPORT_APP_CACHE_MASK_IROM0 & 0) | DPORT_APP_CACHE_MASK_DROM0 |
+                       DPORT_APP_CACHE_MASK_DRAM1 );
+#elif CONFIG_IDF_TARGET_ESP32S2
+    REG_CLR_BIT( EXTMEM_PRO_ICACHE_CTRL1_REG, (EXTMEM_PRO_ICACHE_MASK_IRAM0) | (EXTMEM_PRO_ICACHE_MASK_IRAM1 & 0) | EXTMEM_PRO_ICACHE_MASK_DROM0 );
+#endif
+#if CONFIG_IDF_TARGET_ESP32
+    Cache_Read_Enable(0);
+#elif CONFIG_IDF_TARGET_ESP32S2
+    Cache_Resume_ICache(autoload);
+#endif
     // Application will need to do Cache_Flush(1) and Cache_Read_Enable(1)
 
     ESP_LOGD(TAG, "start: 0x%08x", entry_addr);
@@ -688,7 +777,6 @@ static void set_cache_and_start_app(
     (*entry)();
 }
 
-
 void bootloader_reset(void)
 {
 #ifdef BOOTLOADER_BUILD
@@ -720,6 +808,24 @@ esp_err_t bootloader_sha256_hex_to_str(char *out_str, const uint8_t *in_array_he
     return ESP_OK;
 }
 
+void bootloader_debug_buffer(const void *buffer, size_t length, const char *label)
+{
+#if CONFIG_BOOTLOADER_LOG_LEVEL >= 4
+    const uint8_t *bytes = (const uint8_t *)buffer;
+    const size_t output_len = MIN(length, 128);
+    char hexbuf[128 * 2 + 1];
+
+    bootloader_sha256_hex_to_str(hexbuf, bytes, output_len);
+
+    hexbuf[output_len * 2] = '\0';
+    ESP_LOGD(TAG, "%s: %s", label, hexbuf);
+#else
+    (void) buffer;
+    (void) length;
+    (void) label;
+#endif
+}
+
 esp_err_t bootloader_sha256_flash_contents(uint32_t flash_offset, uint32_t len, uint8_t *digest)
 {