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feat(esp32s31): add reset reason and panic handler support

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This commit is contained in:
Marius Vikhammer
2026-01-21 11:55:36 +08:00
parent 469ead652b
commit 8e2eb36b86
3 changed files with 36 additions and 15 deletions
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components/esp_rom/esp32s31/include/esp32s31/rom/rtc.h
+7 -1
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2010-2025 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2010-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -94,6 +94,12 @@ extern "C" {
#define RTC_MEMORY_CRC_REG RTC_CNTL_STORE7_REG
#define ROM_LOG_CTRL_REG RTC_XTAL_FREQ_REG
/* Reset reason hint register - same as RTC_ENTRY_ADDR_REG, can be used for both
* deep sleep wake stub entry address and reset reason hint, since wake stub
* is only used for deep sleep reset.
*/
#define RTC_RESET_CAUSE_REG RTC_ENTRY_ADDR_REG
// used to check if app core need hot boot in start.S
#define APP_CORE_BOOT_ADDR_REG LP_SYS_BOOT_ADDR_HP_CORE1_REG
// used to check if we need do software retention in start.S
components/esp_system/port/soc/esp32s31/reset_reason.c
+25 -10
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@@ -1,5 +1,5 @@
/*
* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2025-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
@@ -12,8 +12,6 @@
#include "hal/efuse_hal.h"
#include "esp32s31/rom/rtc.h"
// TODO: ["ESP32S31"] IDF-14672
static void esp_reset_reason_clear_hint(void);
static esp_reset_reason_t s_reset_reason;
@@ -35,15 +33,20 @@ static esp_reset_reason_t get_reset_reason(soc_reset_reason_t rtc_reset_reason,
return ESP_RST_SW;
case RESET_REASON_CORE_PMU_PWR_DOWN:
case RESET_REASON_CPU_PMU_PWR_DOWN: // TODO: ESP32-S31 IDF-15181
return ESP_RST_DEEPSLEEP;
case RESET_REASON_CORE_MWDT0:
return ESP_RST_TASK_WDT;
case RESET_REASON_CORE_MWDT1:
return ESP_RST_INT_WDT;
case RESET_REASON_CPU_MWDT:
case RESET_REASON_CPU_RWDT:
case RESET_REASON_SYS_SUPER_WDT:
case RESET_REASON_SYS_RWDT:
case RESET_REASON_CORE_MWDT:
case RESET_REASON_CORE_RWDT:
/* Code is the same for INT vs Task WDT */
return ESP_RST_WDT;
case RESET_REASON_SYS_BROWN_OUT:
@@ -90,23 +93,35 @@ esp_reset_reason_t esp_reset_reason(void)
* is only used for deep sleep reset, and in this case the reason provided by
* esp_rom_get_reset_reason is unambiguous.
*
* Same layout is used as for RTC_APB_FREQ_REG (a.k.a. RTC_CNTL_STORE5_REG):
* Same layout is used as for RTC_XTAL_FREQ_REG (a.k.a. RTC_CNTL_STORE4_REG):
* the value is replicated in low and high half-words. In addition to that,
* MSB is set to 1, which doesn't happen when RTC_CNTL_STORE6_REG contains
* deep sleep wake stub address.
*/
/* in IRAM, can be called from panic handler */
#define RST_REASON_BIT 0x80000000
#define RST_REASON_MASK 0x7FFF
#define RST_REASON_SHIFT 16
void esp_reset_reason_set_hint(esp_reset_reason_t hint)
{
// TODO: ["ESP32S31"] IDF-14672
assert((hint & (~RST_REASON_MASK)) == 0);
uint32_t val = hint | (hint << RST_REASON_SHIFT) | RST_REASON_BIT;
REG_WRITE(RTC_RESET_CAUSE_REG, val);
}
esp_reset_reason_t esp_reset_reason_get_hint(void)
{
return 0; // TODO: ["ESP32S31"] IDF-14672
uint32_t reset_reason_hint = REG_READ(RTC_RESET_CAUSE_REG);
uint32_t high = (reset_reason_hint >> RST_REASON_SHIFT) & RST_REASON_MASK;
uint32_t low = reset_reason_hint & RST_REASON_MASK;
if ((reset_reason_hint & RST_REASON_BIT) == 0 || high != low) {
return ESP_RST_UNKNOWN;
}
return (esp_reset_reason_t) low;
}
static inline void esp_reset_reason_clear_hint(void)
{
// TODO: ["ESP32S31"] IDF-14672
REG_WRITE(RTC_RESET_CAUSE_REG, 0);
}
components/soc/esp32s31/include/soc/reset_reasons.h
+4 -4
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@@ -1,13 +1,11 @@
/*
* SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
* SPDX-FileCopyrightText: 2025-2026 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0 OR MIT
*/
#pragma once
// TODO: to be checked IDF-14672
//+-----------------------------------------------Terminology---------------------------------------------+
//| |
//| CPU Reset: Reset CPU core only, once reset done, CPU will execute from reset vector |
@@ -33,7 +31,9 @@ typedef enum {
RESET_REASON_CORE_SW = 0x03, // Software resets the digital core
RESET_REASON_CORE_DEEP_SLEEP = 0x05, // Deep sleep reset the digital core, check when doing sleep bringup
RESET_REASON_CORE_PMU_PWR_DOWN = 0x05, // PMU HP power down core reset
RESET_REASON_CORE_MWDT = 0x07, // MWDT core reset
RESET_REASON_CPU_PMU_PWR_DOWN = 0x06, // PMU HP CPU power down reset
RESET_REASON_CORE_MWDT0 = 0x07, // MWDT0 core reset
RESET_REASON_CORE_MWDT1 = 0x08, // MWDT1 core reset
RESET_REASON_CORE_RWDT = 0x09, // RWDT core reset
RESET_REASON_CPU_MWDT = 0x0B, // MWDT HP CPU 0/1 reset
RESET_REASON_CPU_SW = 0x0C, // Software resets HP CPU 0/1