Update IDF, tools and toolchains

tools/sdk/esp32s2/include/ulp/include/esp32s2/ulp_riscv.h

@@ -0,0 +1,44 @@
+// 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.
+// 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 <stddef.h>
+#include <stdlib.h>
+#include "esp_err.h"
+#include "soc/soc.h"
+#include "ulp_common.h"
+
+/**
+ * @brief Run the program loaded into RTC memory
+ * @return  ESP_OK on success
+ */
+esp_err_t ulp_riscv_run(void);
+
+/**
+ * @brief Load ULP-RISC-V program binary into RTC memory
+ * 
+ * Different than ULP FSM, the binary program has no special format, it is the ELF
+ * file generated by RISC-V toolchain converted to binary format using objcopy.
+ *
+ * Linker script in components/ulp/ld/esp32s2.ulp.riscv.ld produces ELF files which
+ * correspond to this format. This linker script produces binaries with load_addr == 0.
+ *
+ * @param program_binary pointer to program binary
+ * @param program_size_bytes size of the program binary
+ * @return
+ *      - ESP_OK on success
+ *      - ESP_ERR_INVALID_SIZE if program_size_bytes is more than 8KiB  
+ */
+esp_err_t ulp_riscv_load_binary(const uint8_t* program_binary, size_t program_size_bytes);