136 lines
4.6 KiB
C
136 lines
4.6 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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// 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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#pragma once
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#include <stdbool.h>
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#include <esp_err.h>
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#include "esp_flash_partitions.h"
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#define ESP_ERR_IMAGE_BASE 0x2000
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#define ESP_ERR_IMAGE_FLASH_FAIL (ESP_ERR_IMAGE_BASE + 1)
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#define ESP_ERR_IMAGE_INVALID (ESP_ERR_IMAGE_BASE + 2)
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/* Support for app/bootloader image parsing
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Can be compiled as part of app or bootloader code.
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*/
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/* SPI flash mode, used in esp_image_header_t */
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typedef enum {
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ESP_IMAGE_SPI_MODE_QIO,
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ESP_IMAGE_SPI_MODE_QOUT,
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ESP_IMAGE_SPI_MODE_DIO,
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ESP_IMAGE_SPI_MODE_DOUT,
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ESP_IMAGE_SPI_MODE_FAST_READ,
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ESP_IMAGE_SPI_MODE_SLOW_READ
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} esp_image_spi_mode_t;
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/* SPI flash clock frequency */
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enum {
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ESP_IMAGE_SPI_SPEED_40M,
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ESP_IMAGE_SPI_SPEED_26M,
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ESP_IMAGE_SPI_SPEED_20M,
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ESP_IMAGE_SPI_SPEED_80M = 0xF
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} esp_image_spi_freq_t;
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/* Supported SPI flash sizes */
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typedef enum {
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ESP_IMAGE_FLASH_SIZE_1MB = 0,
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ESP_IMAGE_FLASH_SIZE_2MB,
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ESP_IMAGE_FLASH_SIZE_4MB,
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ESP_IMAGE_FLASH_SIZE_8MB,
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ESP_IMAGE_FLASH_SIZE_16MB,
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ESP_IMAGE_FLASH_SIZE_MAX
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} esp_image_flash_size_t;
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#define ESP_IMAGE_HEADER_MAGIC 0xE9
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/* Main header of binary image */
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typedef struct {
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uint8_t magic;
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uint8_t segment_count;
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uint8_t spi_mode; /* flash read mode (esp_image_spi_mode_t as uint8_t) */
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uint8_t spi_speed: 4; /* flash frequency (esp_image_spi_freq_t as uint8_t) */
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uint8_t spi_size: 4; /* flash chip size (esp_image_flash_size_t as uint8_t) */
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uint32_t entry_addr;
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uint8_t encrypt_flag; /* encrypt flag */
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uint8_t extra_header[15]; /* ESP32 additional header, unused by second bootloader */
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} esp_image_header_t;
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/* Header of binary image segment */
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typedef struct {
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uint32_t load_addr;
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uint32_t data_len;
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} esp_image_segment_header_t;
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#define ESP_IMAGE_MAX_SEGMENTS 16
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/* Structure to hold on-flash image metadata */
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typedef struct {
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uint32_t start_addr; /* Start address of image */
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esp_image_header_t image; /* Header for entire image */
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esp_image_segment_header_t segments[ESP_IMAGE_MAX_SEGMENTS]; /* Per-segment header data */
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uint32_t segment_data[ESP_IMAGE_MAX_SEGMENTS]; /* Data offsets for each segment */
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uint32_t image_length;
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} esp_image_metadata_t;
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/* Mode selection for esp_image_load() */
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typedef enum {
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ESP_IMAGE_VERIFY, /* Verify image contents, load metadata. Print errorsors. */
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ESP_IMAGE_VERIFY_SILENT, /* Verify image contents, load metadata. Don't print errors. */
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#ifdef BOOTLOADER_BUILD
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ESP_IMAGE_LOAD, /* Verify image contents, load to memory. Print errors. */
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#endif
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} esp_image_load_mode_t;
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/**
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* @brief Verify and (optionally, in bootloader mode) load an app image.
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*
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* If encryption is enabled, data will be transparently decrypted.
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*
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* @param part Partition to load the app from.
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* @param[out] data Pointer to the metadata structure to be filled in by this function. 'start_addr' member should be set (to the start address of the image.) Other fields will all be initialised by this function.
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* @param log_errors Log errors reading the image.
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*
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* Image validation checks:
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* - Magic byte
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* - Partition smaller than 16MB
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* - All segments & image fit in partition
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* - 8 bit image checksum is valid
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* - (Signature) if signature verification is enabled
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*
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* @return ESP_OK if image metadata was loaded successfully, ESP_ERR_IMAGE_FLASH_FAIL if a SPI flash error occurs, ESP_ERR_IMAGE_INVALID if the image appears invalid, ESP_ERR_INVALID_ARG if the data pointer is invalid.
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*/
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esp_err_t esp_image_load(esp_image_load_mode_t mode, const esp_partition_pos_t *part, esp_image_metadata_t *data);
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/**
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* @brief Verify the bootloader image.
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*
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* @param[out] If result is ESP_OK and this pointer is non-NULL, it
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* will be set to the length of the bootloader image.
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*
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* @return As per esp_image_load_metadata().
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*/
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esp_err_t esp_image_verify_bootloader(uint32_t *length);
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typedef struct {
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uint32_t drom_addr;
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uint32_t drom_load_addr;
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uint32_t drom_size;
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uint32_t irom_addr;
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uint32_t irom_load_addr;
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uint32_t irom_size;
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} esp_image_flash_mapping_t;
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