mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-30 11:28:21 +00:00
110 lines
4.5 KiB
C
110 lines
4.5 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (c) SatoshiLabs
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef FLASH_AREA_H
|
|
#define FLASH_AREA_H
|
|
|
|
#include <stdint.h>
|
|
#include "secbool.h"
|
|
|
|
#include "flash.h"
|
|
|
|
/**
|
|
* Flash driver interface is designed to abstract away differences between
|
|
* various MCUs used in Trezor devices.
|
|
*
|
|
* Generally, flash memory is divided into sectors. On different MCUs, sectors
|
|
* may have different sizes, and therefore, different number of sectors are used
|
|
* for a given purpose. For example, on STM32F4, the sectors are relatively
|
|
* large so we use single sector for Storage. On STM32U5, the sectors are
|
|
* smaller, so we use multiple sectors for the Storage. Storage implementation
|
|
* should not care about this, and should use flash_area_t interface to access
|
|
* the flash memory.
|
|
*
|
|
* flash_area_t represents a location in flash memory. It may be contiguous, or
|
|
* it may be composed of multiple non-contiguous subareas.
|
|
*
|
|
* flash_subarea_t represents a contiguous area in flash memory, specified by
|
|
* first_sector and num_sectors.
|
|
*/
|
|
|
|
typedef struct {
|
|
uint16_t first_sector;
|
|
uint16_t num_sectors;
|
|
} flash_subarea_t;
|
|
|
|
typedef struct {
|
|
flash_subarea_t subarea[4];
|
|
uint8_t num_subareas;
|
|
} flash_area_t;
|
|
|
|
uint32_t flash_area_get_size(const flash_area_t *area);
|
|
|
|
uint16_t flash_area_total_sectors(const flash_area_t *area);
|
|
|
|
const void *flash_area_get_address(const flash_area_t *area, uint32_t offset,
|
|
uint32_t size);
|
|
|
|
#if defined FLASH_BIT_ACCESS
|
|
secbool __wur flash_area_write_byte(const flash_area_t *area, uint32_t offset,
|
|
uint8_t data);
|
|
secbool __wur flash_area_write_word(const flash_area_t *area, uint32_t offset,
|
|
uint32_t data);
|
|
#endif
|
|
secbool __wur flash_area_write_quadword(const flash_area_t *area,
|
|
uint32_t offset, const uint32_t *data);
|
|
|
|
secbool __wur flash_area_write_burst(const flash_area_t *area, uint32_t offset,
|
|
const uint32_t *data);
|
|
|
|
secbool __wur flash_area_write_block(const flash_area_t *area, uint32_t offset,
|
|
const flash_block_t block);
|
|
|
|
// Writes data to specified 'offset' inside a flash area
|
|
// Data is written in efficient way, using the smallest possible number of
|
|
// flash operations on the given architecture.
|
|
// Data and its size must be aligned to size of one flash block
|
|
secbool __wur flash_area_write_data(const flash_area_t *area, uint32_t offset,
|
|
const void *data, uint32_t size);
|
|
|
|
// Writes data to specified 'offset' inside a flash area
|
|
// Data is written in efficient way, using the smallest possible number of
|
|
// flash operations on the given architecture.
|
|
// Data and total size must be aligned to size of one flash block
|
|
// The difference between data_size and total_size is padded with 'padding'
|
|
secbool __wur flash_area_write_data_padded(const flash_area_t *area,
|
|
uint32_t offset, const void *data,
|
|
uint32_t data_size, uint8_t padding,
|
|
uint32_t total_size);
|
|
|
|
secbool __wur flash_area_erase(const flash_area_t *area,
|
|
void (*progress)(int pos, int len));
|
|
secbool __wur flash_area_erase_bulk(const flash_area_t *area, int count,
|
|
void (*progress)(int pos, int len));
|
|
|
|
// Erases the single sector in the designated flash area
|
|
// The 'offset' parameter must indicate the relative sector offset within the
|
|
// flash area If 'offset' is outside the bounds of the flash area,
|
|
// 'bytes_erased' is set to 0 otherwise, 'bytes_erased' is set to the size of
|
|
// the erased sector
|
|
secbool __wur flash_area_erase_partial(const flash_area_t *area,
|
|
uint32_t offset, uint32_t *bytes_erased);
|
|
|
|
#endif // FLASH_AREA_H
|