boot/espressif/hal/src/bootloader_wdt.c

/*
 * Copyright (c) 2021 Espressif Systems (Shanghai) Co., Ltd.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <bootloader_wdt.h>
#include <hal/wdt_hal.h>
#include "soc/rtc.h"

void bootloader_wdt_feed(void)
{
    wdt_hal_context_t rtc_wdt_ctx = {.inst = WDT_RWDT, .rwdt_dev = &RTCCNTL};
    wdt_hal_write_protect_disable(&rtc_wdt_ctx);
    wdt_hal_feed(&rtc_wdt_ctx);
    wdt_hal_write_protect_enable(&rtc_wdt_ctx);
}

void bootloader_config_wdt(void)
{
    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_ESP_MCUBOOT_WDT_ENABLE
    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

    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);
}