mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 07:28:10 +00:00
310 lines
9.1 KiB
C
310 lines
9.1 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/>.
|
|
*/
|
|
|
|
#include "flash_area.h"
|
|
#include <stdbool.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
|
|
uint32_t flash_area_get_size(const flash_area_t *area) {
|
|
uint32_t size = 0;
|
|
for (int i = 0; i < area->num_subareas; i++) {
|
|
size += flash_sector_size(area->subarea[i].first_sector,
|
|
area->subarea[i].num_sectors);
|
|
}
|
|
return size;
|
|
}
|
|
|
|
uint16_t flash_area_total_sectors(const flash_area_t *area) {
|
|
uint16_t total = 0;
|
|
for (int i = 0; i < area->num_subareas; i++) {
|
|
total += area->subarea[i].num_sectors;
|
|
}
|
|
return total;
|
|
}
|
|
|
|
static secbool get_sector_and_offset(const flash_area_t *area, uint32_t offset,
|
|
uint16_t *sector_out,
|
|
uint32_t *offset_out) {
|
|
for (int i = 0; i < area->num_subareas; i++) {
|
|
// Get the sub-area parameters
|
|
uint16_t first_sector = area->subarea[i].first_sector;
|
|
uint16_t num_sectors = area->subarea[i].num_sectors;
|
|
uint32_t subarea_size = flash_sector_size(first_sector, num_sectors);
|
|
// Does the requested offset start in the sub-area?
|
|
if (offset < subarea_size) {
|
|
uint16_t found_sector = flash_sector_find(first_sector, offset);
|
|
*sector_out = found_sector;
|
|
*offset_out =
|
|
offset - flash_sector_size(first_sector, found_sector - first_sector);
|
|
return sectrue;
|
|
}
|
|
offset -= subarea_size;
|
|
}
|
|
|
|
return secfalse;
|
|
}
|
|
|
|
const void *flash_area_get_address(const flash_area_t *area, uint32_t offset,
|
|
uint32_t size) {
|
|
for (int i = 0; i < area->num_subareas; i++) {
|
|
// Get sub-area parameters
|
|
uint16_t first_sector = area->subarea[i].first_sector;
|
|
uint16_t num_sectors = area->subarea[i].num_sectors;
|
|
uint32_t subarea_size = flash_sector_size(first_sector, num_sectors);
|
|
// Does the requested block start in the sub-area?
|
|
if (offset < subarea_size) {
|
|
// Does the requested block fit in the sub-area?
|
|
if (offset + size <= subarea_size) {
|
|
const uint8_t *ptr =
|
|
(const uint8_t *)flash_get_address(first_sector, 0, 0);
|
|
// We expect that all sectors/pages in the sub-area make
|
|
// a continuous block of adresses with the same security atributes
|
|
return ptr + offset;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
offset -= subarea_size;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#if defined FLASH_BIT_ACCESS
|
|
|
|
secbool flash_area_write_byte(const flash_area_t *area, uint32_t offset,
|
|
uint8_t data) {
|
|
uint16_t sector;
|
|
uint32_t sector_offset;
|
|
if (get_sector_and_offset(area, offset, §or, §or_offset) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
return flash_write_byte(sector, sector_offset, data);
|
|
}
|
|
|
|
secbool flash_area_write_word(const flash_area_t *area, uint32_t offset,
|
|
uint32_t data) {
|
|
uint16_t sector;
|
|
uint32_t sector_offset;
|
|
if (get_sector_and_offset(area, offset, §or, §or_offset) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
return flash_write_word(sector, sector_offset, data);
|
|
}
|
|
|
|
#else // not defined FLASH_BIT_ACCESS
|
|
|
|
secbool flash_area_write_quadword(const flash_area_t *area, uint32_t offset,
|
|
const uint32_t *data) {
|
|
uint16_t sector;
|
|
uint32_t sector_offset;
|
|
if (get_sector_and_offset(area, offset, §or, §or_offset) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
return flash_write_quadword(sector, sector_offset, data);
|
|
}
|
|
|
|
#endif // not defined FLASH_BIT_ACCESS
|
|
|
|
#ifdef FLASH_BURST_SIZE
|
|
secbool flash_area_write_burst(const flash_area_t *area, uint32_t offset,
|
|
const uint32_t *data) {
|
|
uint16_t sector;
|
|
uint32_t sector_offset;
|
|
if (get_sector_and_offset(area, offset, §or, §or_offset) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
return flash_write_burst(sector, sector_offset, data);
|
|
}
|
|
#endif
|
|
|
|
secbool flash_area_write_block(const flash_area_t *area, uint32_t offset,
|
|
const flash_block_t block) {
|
|
if (!FLASH_IS_ALIGNED(offset)) {
|
|
return secfalse;
|
|
}
|
|
|
|
uint16_t sector;
|
|
uint32_t sector_offset;
|
|
if (sectrue != get_sector_and_offset(area, offset, §or, §or_offset)) {
|
|
return secfalse;
|
|
}
|
|
|
|
return flash_write_block(sector, sector_offset, block);
|
|
}
|
|
|
|
secbool __wur flash_area_write_data(const flash_area_t *area, uint32_t offset,
|
|
const void *data, uint32_t size) {
|
|
return flash_area_write_data_padded(area, offset, data, size, 0, size);
|
|
}
|
|
|
|
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) {
|
|
if (offset % FLASH_BLOCK_SIZE) {
|
|
return secfalse;
|
|
}
|
|
if (total_size % FLASH_BLOCK_SIZE) {
|
|
return secfalse;
|
|
}
|
|
if (data_size > total_size) {
|
|
return secfalse;
|
|
}
|
|
if (offset + total_size > flash_area_get_size(area)) {
|
|
return secfalse;
|
|
}
|
|
|
|
const uint32_t *data32 = (const uint32_t *)data;
|
|
|
|
while (total_size > 0) {
|
|
#ifdef FLASH_BURST_SIZE
|
|
if ((offset % FLASH_BURST_SIZE) == 0 &&
|
|
(offset + FLASH_BURST_SIZE) <= total_size) {
|
|
if (data_size >= FLASH_BURST_SIZE) {
|
|
if (flash_area_write_burst(area, offset, data32) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
data_size -= FLASH_BURST_SIZE;
|
|
data32 += FLASH_BURST_WORDS;
|
|
} else {
|
|
uint32_t burst[FLASH_BURST_WORDS];
|
|
memset(burst, padding, sizeof(burst));
|
|
if (data_size > 0) {
|
|
memcpy(burst, data32, data_size);
|
|
data_size = 0;
|
|
}
|
|
if (flash_area_write_burst(area, offset, burst) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
}
|
|
offset += FLASH_BURST_SIZE;
|
|
total_size -= FLASH_BURST_SIZE;
|
|
} else
|
|
#endif
|
|
{
|
|
if (data_size >= FLASH_BLOCK_SIZE) {
|
|
if (flash_area_write_block(area, offset, data32) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
data_size -= FLASH_BLOCK_SIZE;
|
|
data32 += FLASH_BLOCK_WORDS;
|
|
} else {
|
|
uint32_t block[FLASH_BLOCK_WORDS];
|
|
memset(block, padding, sizeof(block));
|
|
if (data_size > 0) {
|
|
memcpy(block, data32, data_size);
|
|
data_size = 0;
|
|
}
|
|
if (flash_area_write_block(area, offset, block) != sectrue) {
|
|
return secfalse;
|
|
}
|
|
}
|
|
offset += FLASH_BLOCK_SIZE;
|
|
total_size -= FLASH_BLOCK_SIZE;
|
|
}
|
|
}
|
|
|
|
return sectrue;
|
|
}
|
|
|
|
secbool flash_area_erase(const flash_area_t *area,
|
|
void (*progress)(int pos, int len)) {
|
|
return flash_area_erase_bulk(area, 1, progress);
|
|
}
|
|
|
|
static secbool erase_sector(uint16_t sector) {
|
|
secbool result = secfalse;
|
|
|
|
if (sectrue != flash_unlock_write()) {
|
|
return secfalse;
|
|
}
|
|
|
|
result = flash_sector_erase(sector);
|
|
|
|
if (sectrue != flash_lock_write()) {
|
|
return secfalse;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
secbool flash_area_erase_bulk(const flash_area_t *area, int count,
|
|
void (*progress)(int pos, int len)) {
|
|
int total_sectors = 0;
|
|
int done_sectors = 0;
|
|
for (int a = 0; a < count; a++) {
|
|
for (int i = 0; i < area[a].num_subareas; i++) {
|
|
total_sectors += area[a].subarea[i].num_sectors;
|
|
}
|
|
}
|
|
if (progress) {
|
|
progress(0, total_sectors);
|
|
}
|
|
|
|
for (int a = 0; a < count; a++) {
|
|
for (int s = 0; s < area[a].num_subareas; s++) {
|
|
for (int i = 0; i < area[a].subarea[s].num_sectors; i++) {
|
|
int sector = area[a].subarea[s].first_sector + i;
|
|
|
|
if (sectrue != erase_sector(sector)) {
|
|
return secfalse;
|
|
}
|
|
|
|
done_sectors++;
|
|
if (progress) {
|
|
progress(done_sectors, total_sectors);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return sectrue;
|
|
}
|
|
|
|
secbool flash_area_erase_partial(const flash_area_t *area, uint32_t offset,
|
|
uint32_t *bytes_erased) {
|
|
uint32_t sector_offset = 0;
|
|
*bytes_erased = 0;
|
|
|
|
for (int s = 0; s < area->num_subareas; s++) {
|
|
for (int i = 0; i < area->subarea[s].num_sectors; i++) {
|
|
uint32_t sector = area->subarea[s].first_sector + i;
|
|
uint32_t sector_size = flash_sector_size(sector, 1);
|
|
|
|
if (offset == sector_offset) {
|
|
if (sectrue != erase_sector(sector)) {
|
|
return secfalse;
|
|
}
|
|
|
|
*bytes_erased = sector_size;
|
|
return sectrue;
|
|
}
|
|
|
|
sector_offset += sector_size;
|
|
}
|
|
}
|
|
|
|
if (offset == sector_offset) {
|
|
return sectrue;
|
|
}
|
|
|
|
return secfalse;
|
|
}
|