Makes app image booting more reliable (256-bit rather than 8-bit verification.) Some measurements, time to boot a 655KB app.bin file and run to app_main() execution. (All for rev 1 silicon, ie no 340ms spurious WDT delay.) 80MHz QIO mode: before = 300ms after = 140ms 40MHz DIO mode: before = 712ms after = 577ms 40MHz DIO mode, secure boot enabled before = 1380ms after = 934ms (Secure boot involves two ECC signature verifications (partition table, app) that take approx 300ms each with 80MHz CPU.)
153 lines
5.5 KiB
C
153 lines
5.5 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
#pragma once
|
|
|
|
#include <stdbool.h>
|
|
#include <esp_err.h>
|
|
#include "esp_flash_partitions.h"
|
|
|
|
#define ESP_ERR_IMAGE_BASE 0x2000
|
|
#define ESP_ERR_IMAGE_FLASH_FAIL (ESP_ERR_IMAGE_BASE + 1)
|
|
#define ESP_ERR_IMAGE_INVALID (ESP_ERR_IMAGE_BASE + 2)
|
|
|
|
/* Support for app/bootloader image parsing
|
|
Can be compiled as part of app or bootloader code.
|
|
*/
|
|
|
|
/* SPI flash mode, used in esp_image_header_t */
|
|
typedef enum {
|
|
ESP_IMAGE_SPI_MODE_QIO,
|
|
ESP_IMAGE_SPI_MODE_QOUT,
|
|
ESP_IMAGE_SPI_MODE_DIO,
|
|
ESP_IMAGE_SPI_MODE_DOUT,
|
|
ESP_IMAGE_SPI_MODE_FAST_READ,
|
|
ESP_IMAGE_SPI_MODE_SLOW_READ
|
|
} esp_image_spi_mode_t;
|
|
|
|
/* SPI flash clock frequency */
|
|
enum {
|
|
ESP_IMAGE_SPI_SPEED_40M,
|
|
ESP_IMAGE_SPI_SPEED_26M,
|
|
ESP_IMAGE_SPI_SPEED_20M,
|
|
ESP_IMAGE_SPI_SPEED_80M = 0xF
|
|
} esp_image_spi_freq_t;
|
|
|
|
/* Supported SPI flash sizes */
|
|
typedef enum {
|
|
ESP_IMAGE_FLASH_SIZE_1MB = 0,
|
|
ESP_IMAGE_FLASH_SIZE_2MB,
|
|
ESP_IMAGE_FLASH_SIZE_4MB,
|
|
ESP_IMAGE_FLASH_SIZE_8MB,
|
|
ESP_IMAGE_FLASH_SIZE_16MB,
|
|
ESP_IMAGE_FLASH_SIZE_MAX
|
|
} esp_image_flash_size_t;
|
|
|
|
#define ESP_IMAGE_HEADER_MAGIC 0xE9
|
|
|
|
/* Main header of binary image */
|
|
typedef struct {
|
|
uint8_t magic;
|
|
uint8_t segment_count;
|
|
/* flash read mode (esp_image_spi_mode_t as uint8_t) */
|
|
uint8_t spi_mode;
|
|
/* flash frequency (esp_image_spi_freq_t as uint8_t) */
|
|
uint8_t spi_speed: 4;
|
|
/* flash chip size (esp_image_flash_size_t as uint8_t) */
|
|
uint8_t spi_size: 4;
|
|
uint32_t entry_addr;
|
|
/* WP pin when SPI pins set via efuse (read by ROM bootloader, the IDF bootloader uses software to configure the WP
|
|
* pin and sets this field to 0xEE=disabled) */
|
|
uint8_t wp_pin;
|
|
/* Drive settings for the SPI flash pins (read by ROM bootloader) */
|
|
uint8_t spi_pin_drv[3];
|
|
/* Reserved bytes in ESP32 additional header space, currently unused */
|
|
uint8_t reserved[11];
|
|
/* If 1, a SHA256 digest "simple hash" (of the entire image) is appended after the checksum. Included in image length. This digest
|
|
* is separate to secure boot and only used for detecting corruption. For secure boot signed images, the signature
|
|
* is appended after this (and the simple hash is included in the signed data). */
|
|
uint8_t hash_appended;
|
|
} __attribute__((packed)) esp_image_header_t;
|
|
|
|
_Static_assert(sizeof(esp_image_header_t) == 24, "binary image header should be 24 bytes");
|
|
|
|
/* Header of binary image segment */
|
|
typedef struct {
|
|
uint32_t load_addr;
|
|
uint32_t data_len;
|
|
} esp_image_segment_header_t;
|
|
|
|
#define ESP_IMAGE_MAX_SEGMENTS 16
|
|
|
|
/* Structure to hold on-flash image metadata */
|
|
typedef struct {
|
|
uint32_t start_addr; /* Start address of image */
|
|
esp_image_header_t image; /* Header for entire image */
|
|
esp_image_segment_header_t segments[ESP_IMAGE_MAX_SEGMENTS]; /* Per-segment header data */
|
|
uint32_t segment_data[ESP_IMAGE_MAX_SEGMENTS]; /* Data offsets for each segment */
|
|
uint32_t image_len; /* Length of image on flash, in bytes */
|
|
} esp_image_metadata_t;
|
|
|
|
/* Mode selection for esp_image_load() */
|
|
typedef enum {
|
|
ESP_IMAGE_VERIFY, /* Verify image contents, load metadata. Print errorsors. */
|
|
ESP_IMAGE_VERIFY_SILENT, /* Verify image contents, load metadata. Don't print errors. */
|
|
#ifdef BOOTLOADER_BUILD
|
|
ESP_IMAGE_LOAD, /* Verify image contents, load to memory. Print errors. */
|
|
#endif
|
|
} esp_image_load_mode_t;
|
|
|
|
/**
|
|
* @brief Verify and (optionally, in bootloader mode) load an app image.
|
|
*
|
|
* If encryption is enabled, data will be transparently decrypted.
|
|
*
|
|
* @param mode Mode of operation (verify, silent verify, or load).
|
|
* @param part Partition to load the app from.
|
|
* @param[inout] data Pointer to the image metadata structure which is 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.
|
|
*
|
|
* Image validation checks:
|
|
* - Magic byte.
|
|
* - Partition smaller than 16MB.
|
|
* - All segments & image fit in partition.
|
|
* - 8 bit image checksum is valid.
|
|
* - SHA-256 of image is valid (if image has this appended).
|
|
* - (Signature) if signature verification is enabled.
|
|
*
|
|
* @return
|
|
* - ESP_OK if verify or load was successful
|
|
* - 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 partition or data pointers are invalid.
|
|
*/
|
|
esp_err_t esp_image_load(esp_image_load_mode_t mode, const esp_partition_pos_t *part, esp_image_metadata_t *data);
|
|
|
|
/**
|
|
* @brief Verify the bootloader image.
|
|
*
|
|
* @param[out] If result is ESP_OK and this pointer is non-NULL, it
|
|
* will be set to the length of the bootloader image.
|
|
*
|
|
* @return As per esp_image_load_metadata().
|
|
*/
|
|
esp_err_t esp_image_verify_bootloader(uint32_t *length);
|
|
|
|
|
|
typedef struct {
|
|
uint32_t drom_addr;
|
|
uint32_t drom_load_addr;
|
|
uint32_t drom_size;
|
|
uint32_t irom_addr;
|
|
uint32_t irom_load_addr;
|
|
uint32_t irom_size;
|
|
} esp_image_flash_mapping_t;
|