kopia lustrzana https://github.com/espressif/esp-idf
69 wiersze
2.1 KiB
C
69 wiersze
2.1 KiB
C
/*
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* SPDX-FileCopyrightText: 2015-2021 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdbool.h>
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#include "sdkconfig.h"
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#include "esp_log.h"
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#include "bootloader_init.h"
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#include "bootloader_utility.h"
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#include "bootloader_common.h"
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static const char* TAG = "boot";
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static int select_partition_number(bootloader_state_t *bs);
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/*
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* We arrive here after the ROM bootloader finished loading this second stage bootloader from flash.
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* The hardware is mostly uninitialized, flash cache is down and the app CPU is in reset.
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* We do have a stack, so we can do the initialization in C.
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*/
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void __attribute__((noreturn)) call_start_cpu0(void)
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{
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// 1. Hardware initialization
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if (bootloader_init() != ESP_OK) {
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bootloader_reset();
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}
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#ifdef CONFIG_BOOTLOADER_SKIP_VALIDATE_IN_DEEP_SLEEP
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// If this boot is a wake up from the deep sleep then go to the short way,
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// try to load the application which worked before deep sleep.
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// It skips a lot of checks due to it was done before (while first boot).
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bootloader_utility_load_boot_image_from_deep_sleep();
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// If it is not successful try to load an application as usual.
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#endif
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// 2. Select the number of boot partition
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bootloader_state_t bs = {0};
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int boot_index = select_partition_number(&bs);
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if (boot_index == INVALID_INDEX) {
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bootloader_reset();
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}
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// 2.1 Print a custom message!
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esp_rom_printf("[%s] %s\n", TAG, CONFIG_EXAMPLE_BOOTLOADER_WELCOME_MESSAGE);
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// 3. Load the app image for booting
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bootloader_utility_load_boot_image(&bs, boot_index);
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}
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// Select the number of boot partition
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static int select_partition_number(bootloader_state_t *bs)
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{
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// 1. Load partition table
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if (!bootloader_utility_load_partition_table(bs)) {
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ESP_LOGE(TAG, "load partition table error!");
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return INVALID_INDEX;
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}
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// 2. Select the number of boot partition
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return bootloader_utility_get_selected_boot_partition(bs);
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}
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// Return global reent struct if any newlib functions are linked to bootloader
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struct _reent *__getreent(void)
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{
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return _GLOBAL_REENT;
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}
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