/* * SPDX-FileCopyrightText: 2015-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ #ifndef __BOOTLOADER_FLASH_H #define __BOOTLOADER_FLASH_H #include #include #include #include #include /* including in bootloader for error values */ #include "sdkconfig.h" #include "bootloader_flash.h" #define FLASH_SECTOR_SIZE 0x1000 #define FLASH_BLOCK_SIZE 0x10000 #define MMAP_ALIGNED_MASK 0x0000FFFF /* SPI commands (actual on-wire commands not SPI controller bitmasks) Suitable for use with the bootloader_execute_flash_command static function. */ #define CMD_RDID 0x9F #define CMD_WRSR 0x01 #define CMD_WRSR2 0x31 /* Not all SPI flash uses this command */ #define CMD_WRSR3 0x11 /* Not all SPI flash uses this command */ #define CMD_WREN 0x06 #define CMD_WRENVSR 0x50 /* Flash write enable for volatile SR bits */ #define CMD_WRDI 0x04 #define CMD_RDSR 0x05 #define CMD_RDSR2 0x35 /* Not all SPI flash uses this command */ #define CMD_RDSR3 0x15 /* Not all SPI flash uses this command */ #define CMD_OTPEN 0x3A /* Enable OTP mode, not all SPI flash uses this command */ #define CMD_RDSFDP 0x5A /* Read the SFDP of the flash */ #define CMD_WRAP 0x77 /* Set burst with wrap command */ #define CMD_RESUME 0x7A /* Resume command to clear flash suspend bit */ #define CMD_FASTRD_4B 0x0C #define CMD_SLOWRD_4B 0x13 /* Provide a Flash API for bootloader_support code, that can be used from bootloader or app code. This header is available to source code in the bootloader & bootloader_support components only. */ /** * @brief Get number of free pages * * @return Number of free pages */ uint32_t bootloader_mmap_get_free_pages(void); /** * @brief Map a region of flash to data memory * * @important In bootloader code, only one region can be bootloader_mmaped at once. The previous region must be bootloader_munmapped before another region is mapped. * * @important In app code, these functions are not thread safe. * * Call bootloader_munmap once for each successful call to bootloader_mmap. * * In esp-idf app, this function maps directly to spi_flash_mmap. * * @param offset - Starting flash offset to map to memory. * @param length - Length of data to map. * * @return Pointer to mapped data memory (at src_addr), or NULL * if an allocation error occured. */ const void *bootloader_mmap(uint32_t src_addr, uint32_t size); /** * @brief Unmap a previously mapped region of flash * * Call bootloader_munmap once for each successful call to bootloader_mmap. */ void bootloader_munmap(const void *mapping); /** * @brief Read data from Flash. * * * @note All of src, dest and size have to be 4-byte aligned. * * @param src source address of the data in Flash. * @param dest pointer to the destination buffer * @param size length of data * @param allow_decrypt If true and flash encryption is enabled, data on flash * will be decrypted transparently as part of the read. * * @return ESP_OK on success, ESP_ERR_FLASH_OP_FAIL on SPI failure, * ESP_ERR_FLASH_OP_TIMEOUT on SPI timeout. */ esp_err_t bootloader_flash_read(size_t src_addr, void *dest, size_t size, bool allow_decrypt); /** * @brief Write data to Flash. * * @note All of dest_addr, src and size have to be 4-byte aligned. If write_encrypted is set, dest_addr and size must be 32-byte aligned. * * Note: In bootloader, when write_encrypted == true, the src buffer is encrypted in place. * * @param dest_addr Destination address to write in Flash. * @param src Pointer to the data to write to flash * @param size Length of data in bytes. * @param write_encrypted If true, data will be written encrypted on flash. * * @return ESP_OK on success, ESP_ERR_FLASH_OP_FAIL on SPI failure, * ESP_ERR_FLASH_OP_TIMEOUT on SPI timeout. */ esp_err_t bootloader_flash_write(size_t dest_addr, void *src, size_t size, bool write_encrypted); /** * @brief Erase the Flash sector. * * @param sector Sector number, the count starts at sector 0, 4KB per sector. * * @return esp_err_t */ esp_err_t bootloader_flash_erase_sector(size_t sector); /** * @brief Erase the Flash range. * * @param start_addr start address of flash offset * @param size sector aligned size to be erased * * @return esp_err_t */ esp_err_t bootloader_flash_erase_range(uint32_t start_addr, uint32_t size); /* Cache MMU block size */ #define MMU_BLOCK_SIZE 0x00010000 /* Cache MMU address mask (MMU tables ignore bits which are zero) */ #define MMU_FLASH_MASK (~(MMU_BLOCK_SIZE - 1)) /** * @brief Calculate the number of cache pages to map * @param size size of data to map * @param vaddr virtual address where data will be mapped * @return number of cache MMU pages required to do the mapping */ static inline uint32_t bootloader_cache_pages_to_map(uint32_t size, uint32_t vaddr) { return (size + (vaddr - (vaddr & MMU_FLASH_MASK)) + MMU_BLOCK_SIZE - 1) / MMU_BLOCK_SIZE; } /** * @brief Execute a user command on the flash * * @param command The command value to execute. * @param mosi_data MOSI data to send * @param mosi_len Length of MOSI data, in bits * @param miso_len Length of MISO data to receive, in bits * @return Received MISO data */ uint32_t bootloader_execute_flash_command(uint8_t command, uint32_t mosi_data, uint8_t mosi_len, uint8_t miso_len); /** * @brief Read the SFDP of the flash * * @param sfdp_addr Address of the parameter to read * @param miso_byte_num Bytes to read * @return The read SFDP, little endian, 4 bytes at most */ uint32_t bootloader_flash_read_sfdp(uint32_t sfdp_addr, unsigned int miso_byte_num); /** * @brief Enable the flash write protect (WEL bit). */ void bootloader_enable_wp(void); /** * @brief Once this function is called, * any on-going internal operations will be terminated and the device will return to its default power-on * state and lose all the current volatile settings, such as Volatile Status Register bits, Write Enable Latch * (WEL) status, Program/Erase Suspend status, etc. */ void bootloader_spi_flash_reset(void); #endif