test(newlib): enable and fix newlib tests on P4

components/esp_rom/esp32p4/Kconfig.soc_caps.in

@@ -54,3 +54,7 @@ config ESP_ROM_HAS_LP_ROM
 config ESP_ROM_WITHOUT_REGI2C
     bool
     default y
+
+config ESP_ROM_HAS_NEWLIB_NANO_FORMAT
+    bool
+    default y

components/esp_rom/esp32p4/esp_rom_caps.h

@@ -19,3 +19,4 @@
 #define ESP_ROM_WDT_INIT_PATCH              (1) // ROM version does not configure the clock
 #define ESP_ROM_HAS_LP_ROM                  (1) // ROM also has a LP ROM placed in LP memory
 #define ESP_ROM_WITHOUT_REGI2C              (1) // ROM has no regi2c APIs
+#define ESP_ROM_HAS_NEWLIB_NANO_FORMAT      (1) // ROM has the newlib nano version of formatting functions

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

@@ -1,7 +0,0 @@
-# Documentation: .gitlab/ci/README.md#manifest-file-to-control-the-buildtest-apps
-
-components/newlib/test_apps/newlib:
-  disable:
-    - if: IDF_TARGET == "esp32p4"
-      temporary: true
-      reason: not supported yet #TODO: IDF-7862

components/newlib/test_apps/newlib/README.md

@@ -1,2 +1,2 @@
-| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-S2 | ESP32-S3 |
-| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- |
+| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-P4 | ESP32-S2 | ESP32-S3 |
+| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- | -------- |

components/newlib/test_apps/newlib/main/test_newlib.c

@@ -132,7 +132,7 @@ static bool fn_in_rom(void *fn)
 /* Older chips have newlib nano in rom as well, but this is not linked in due to us now using 64 bit time_t
    and the ROM code was compiled for 32 bit.
  */
-#define PRINTF_NANO_IN_ROM (CONFIG_NEWLIB_NANO_FORMAT && (CONFIG_IDF_TARGET_ESP32C2 || CONFIG_IDF_TARGET_ESP32H2))
+#define PRINTF_NANO_IN_ROM (CONFIG_NEWLIB_NANO_FORMAT && (CONFIG_IDF_TARGET_ESP32C2 || CONFIG_IDF_TARGET_ESP32H2 || CONFIG_IDF_TARGET_ESP32P4))
 #define SSCANF_NANO_IN_ROM (CONFIG_NEWLIB_NANO_FORMAT && CONFIG_IDF_TARGET_ESP32C2)
 
 TEST_CASE("check if ROM or Flash is used for functions", "[newlib]")

components/newlib/test_apps/newlib/main/test_time.c

@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2015-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2015-2024 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -45,7 +45,14 @@
 #include "esp32p4/rtc.h"
 #endif
 
-#if portNUM_PROCESSORS == 2
+#if SOC_CACHE_INTERNAL_MEM_VIA_L1CACHE
+#include "hal/cache_ll.h"
+#endif
+
+#if (portNUM_PROCESSORS == 2) && CONFIG_IDF_TARGET_ARCH_XTENSA
+// https://github.com/espressif/arduino-esp32/issues/120
+/* Test for hardware bug, not needed for newer chips */
+
 #include "soc/rtc_cntl_reg.h"
 
 // This runs on APP CPU:
@@ -65,7 +72,7 @@ static void time_adc_test_task(void* arg)
     vTaskDelete(NULL);
 }
 
-// https://github.com/espressif/arduino-esp32/issues/120
+
 TEST_CASE("Reading RTC registers on APP CPU doesn't affect clock", "[newlib]")
 {
     SemaphoreHandle_t done = xSemaphoreCreateBinary();
@@ -85,7 +92,7 @@ TEST_CASE("Reading RTC registers on APP CPU doesn't affect clock", "[newlib]")
     TEST_ASSERT_TRUE(xSemaphoreTake(done, 5000 / portTICK_PERIOD_MS));
 }
 
-#endif // portNUM_PROCESSORS == 2
+#endif // (portNUM_PROCESSORS == 2) && CONFIG_IDF_TARGET_ARCH_XTENSA
 
 TEST_CASE("test adjtime function", "[newlib]")
 {
@@ -609,6 +616,12 @@ static void set_initial_condition(type_reboot_t type_reboot, int error_time)
     TEST_ASSERT_GREATER_OR_EQUAL(error_time, dt);
     s_time_in_reboot = esp_rtc_get_time_us();
 
+#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/reboot
+       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 (type_reboot == TYPE_REBOOT_ABORT) {
         printf("Update boot time based on diff\n");
         esp_sync_timekeeping_timers();

components/newlib/test_apps/newlib/pytest_newlib.py

@@ -31,7 +31,6 @@ def validate_sbom(dut: Dut) -> None:
         assert toolchain_newlib_version == sbom_newlib_version, 'toolchain_newlib_version != sbom_newlib_version'
 
 
-@pytest.mark.temp_skip_ci(targets=['esp32p4'], reason='esp32p4 support TBD')  # TODO: IDF-8983
 @pytest.mark.generic
 @pytest.mark.parametrize(
     'config',