test(system): enable esp_system tests for P4

components/esp_system/test_apps/.build-test-rules.yml

@@ -3,10 +3,6 @@
 components/esp_system/test_apps/esp_system_unity_tests:
   disable:
     - if: CONFIG_NAME == "psram" and SOC_SPIRAM_SUPPORTED != 1
-  disable_test:
-    - if: IDF_TARGET == "esp32p4"
-      temporary: true
-      reason: test not pass, should be re-enable # TODO: IDF-8978
 
 components/esp_system/test_apps/linux_apis:
   enable:

components/esp_system/test_apps/esp_system_unity_tests/main/test_reset_reason.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
@@ -14,6 +14,9 @@
 #if CONFIG_IDF_TARGET_ARCH_RISCV
 #include "riscv/rv_utils.h"
 #endif
+#if SOC_CACHE_INTERNAL_MEM_VIA_L1CACHE
+#include "hal/cache_ll.h"
+#endif
 
 #define RTC_BSS_ATTR __attribute__((section(".rtc.bss")))
 
@@ -131,6 +134,12 @@ static void setup_values(void)
     s_rtc_force_fast_val = CHECK_VALUE;
     s_rtc_force_slow_val = CHECK_VALUE;
 #endif //CHECK_RTC_MEM
+
+#if SOC_CACHE_INTERNAL_MEM_VIA_L1CACHE
+    /* If internal data is behind a cache it might not be written to the physical memory when we crash
+       force a full writeback here to ensure this */
+    cache_ll_writeback_all(CACHE_LL_LEVEL_INT_MEM, CACHE_TYPE_DATA, CACHE_LL_ID_ALL);
+#endif
 }
 
 #if !TEMPORARY_DISABLED_FOR_TARGETS(ESP32P4) // TODO IDF-7529
@@ -166,7 +175,7 @@ TEST_CASE_MULTIPLE_STAGES("reset reason ESP_RST_DEEPSLEEP", "[reset_reason][rese
 static void do_exception(void)
 {
     setup_values();
-    *(int*) (0x40000001) = 0;
+    *(int*) (0x0) = 0;
 }
 
 static void do_abort(void)

components/esp_system/test_apps/esp_system_unity_tests/pytest_esp_system_unity_tests.py

@@ -5,14 +5,13 @@ import pytest
 from pytest_embedded import Dut
 
 
-@pytest.mark.temp_skip_ci(targets=['esp32p4'], reason='esp32p4 support TBD')  # TODO: IDF-8978
 @pytest.mark.generic
 @pytest.mark.parametrize(
     'config',
     [
         pytest.param('default', marks=[pytest.mark.supported_targets]),
         pytest.param('pd_vddsdio', marks=[pytest.mark.supported_targets]),
-        pytest.param('psram', marks=[pytest.mark.esp32, pytest.mark.esp32s2, pytest.mark.esp32s3]),
+        pytest.param('psram', marks=[pytest.mark.esp32, pytest.mark.esp32s2, pytest.mark.esp32s3, pytest.mark.esp32p4]),
         pytest.param('single_core_esp32', marks=[pytest.mark.esp32]),
     ]
 )
@@ -20,7 +19,6 @@ def test_esp_system(dut: Dut) -> None:
     dut.run_all_single_board_cases()
 
 
-@pytest.mark.temp_skip_ci(targets=['esp32p4'], reason='esp32p4 support TBD')  # TODO: IDF-8978
 @pytest.mark.generic
 @pytest.mark.parametrize(
     'config',