115 lines
4 KiB
C
115 lines
4 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <string.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "esp_log.h"
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#include "rom/gpio.h"
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#include "rom/spi_flash.h"
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#include "rom/rtc.h"
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#include "bootloader_config.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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#include "sdkconfig.h"
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#include "esp_image_format.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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static int selected_boot_partition(const 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 call_start_cpu0()
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{
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// 1. Hardware initialization
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if (bootloader_init() != ESP_OK) {
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return;
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}
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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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return;
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}
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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 selected_boot_partition(bs);
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}
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/*
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* Selects a boot partition.
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* The conditions for switching to another firmware are checked.
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*/
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static int selected_boot_partition(const bootloader_state_t *bs)
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{
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int boot_index = bootloader_utility_get_selected_boot_partition(bs);
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if (boot_index == INVALID_INDEX) {
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return boot_index; // Unrecoverable failure (not due to corrupt ota data or bad partition contents)
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}
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if (rtc_get_reset_reason(0) != DEEPSLEEP_RESET) {
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// Factory firmware.
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#ifdef CONFIG_BOOTLOADER_FACTORY_RESET
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if (bootloader_common_check_long_hold_gpio(CONFIG_BOOTLOADER_NUM_PIN_FACTORY_RESET, CONFIG_BOOTLOADER_HOLD_TIME_GPIO) == 1) {
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ESP_LOGI(TAG, "Detect a condition of the factory reset");
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bool ota_data_erase = false;
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#ifdef CONFIG_BOOTLOADER_OTA_DATA_ERASE
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ota_data_erase = true;
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#endif
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const char *list_erase = CONFIG_BOOTLOADER_DATA_FACTORY_RESET;
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ESP_LOGI(TAG, "Data partitions to erase: %s", list_erase);
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if (bootloader_common_erase_part_type_data(list_erase, ota_data_erase) == false) {
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ESP_LOGE(TAG, "Not all partitions were erased");
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}
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return bootloader_utility_get_selected_boot_partition(bs);
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}
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#endif
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// TEST firmware.
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#ifdef CONFIG_BOOTLOADER_APP_TEST
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if (bootloader_common_check_long_hold_gpio(CONFIG_BOOTLOADER_NUM_PIN_APP_TEST, CONFIG_BOOTLOADER_HOLD_TIME_GPIO) == 1) {
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ESP_LOGI(TAG, "Detect a boot condition of the test firmware");
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if (bs->test.offset != 0) {
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boot_index = TEST_APP_INDEX;
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return boot_index;
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} else {
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ESP_LOGE(TAG, "Test firmware is not found in partition table");
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return INVALID_INDEX;
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}
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}
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#endif
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// Customer implementation.
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// if (gpio_pin_1 == true && ...){
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// boot_index = required_boot_partition;
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// } ...
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}
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return boot_index;
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}
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