mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-15 19:08:07 +00:00
131 lines
3.7 KiB
C
131 lines
3.7 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 <libopencm3/stm32/flash.h>
|
|
#include <string.h>
|
|
|
|
#include "common.h"
|
|
#include "flash.h"
|
|
#include "memory.h"
|
|
#include "supervise.h"
|
|
|
|
static const uint32_t FLASH_SECTOR_TABLE[FLASH_SECTOR_COUNT + 1] = {
|
|
[0] = 0x08000000, // - 0x08003FFF | 16 KiB
|
|
[1] = 0x08004000, // - 0x08007FFF | 16 KiB
|
|
[2] = 0x08008000, // - 0x0800BFFF | 16 KiB
|
|
[3] = 0x0800C000, // - 0x0800FFFF | 16 KiB
|
|
[4] = 0x08010000, // - 0x0801FFFF | 64 KiB
|
|
[5] = 0x08020000, // - 0x0803FFFF | 128 KiB
|
|
[6] = 0x08040000, // - 0x0805FFFF | 128 KiB
|
|
[7] = 0x08060000, // - 0x0807FFFF | 128 KiB
|
|
[8] = 0x08080000, // - 0x0809FFFF | 128 KiB
|
|
[9] = 0x080A0000, // - 0x080BFFFF | 128 KiB
|
|
[10] = 0x080C0000, // - 0x080DFFFF | 128 KiB
|
|
[11] = 0x080E0000, // - 0x080FFFFF | 128 KiB
|
|
[12] = 0x08100000, // last element - not a valid sector
|
|
};
|
|
|
|
static secbool flash_check_success(uint32_t status) {
|
|
return (status & (FLASH_SR_PGAERR | FLASH_SR_PGPERR | FLASH_SR_PGSERR |
|
|
FLASH_SR_WRPERR))
|
|
? secfalse
|
|
: sectrue;
|
|
}
|
|
|
|
void flash_init(void) {}
|
|
|
|
secbool flash_unlock_write(void) {
|
|
svc_flash_unlock();
|
|
return sectrue;
|
|
}
|
|
|
|
secbool flash_lock_write(void) { return flash_check_success(svc_flash_lock()); }
|
|
|
|
const void *flash_get_address(uint8_t sector, uint32_t offset, uint32_t size) {
|
|
if (sector >= FLASH_SECTOR_COUNT) {
|
|
return NULL;
|
|
}
|
|
const uint32_t addr = FLASH_SECTOR_TABLE[sector] + offset;
|
|
const uint32_t next = FLASH_SECTOR_TABLE[sector + 1];
|
|
if (addr + size > next) {
|
|
return NULL;
|
|
}
|
|
return (const void *)FLASH_PTR(addr);
|
|
}
|
|
|
|
secbool flash_erase(uint8_t sector) {
|
|
ensure(flash_unlock_write(), NULL);
|
|
svc_flash_erase_sector(sector);
|
|
ensure(flash_lock_write(), NULL);
|
|
|
|
// Check whether the sector was really deleted (contains only 0xFF).
|
|
const uint32_t addr_start = FLASH_SECTOR_TABLE[sector],
|
|
addr_end = FLASH_SECTOR_TABLE[sector + 1];
|
|
for (uint32_t addr = addr_start; addr < addr_end; addr += 4) {
|
|
if (*((const uint32_t *)FLASH_PTR(addr)) != 0xFFFFFFFF) {
|
|
return secfalse;
|
|
}
|
|
}
|
|
return sectrue;
|
|
}
|
|
|
|
secbool flash_write_byte(uint8_t sector, uint32_t offset, uint8_t data) {
|
|
uint8_t *address = (uint8_t *)flash_get_address(sector, offset, 1);
|
|
if (address == NULL) {
|
|
return secfalse;
|
|
}
|
|
|
|
if ((*address & data) != data) {
|
|
return secfalse;
|
|
}
|
|
|
|
svc_flash_program(FLASH_CR_PROGRAM_X8);
|
|
*(volatile uint8_t *)address = data;
|
|
|
|
if (*address != data) {
|
|
return secfalse;
|
|
}
|
|
|
|
return sectrue;
|
|
}
|
|
|
|
secbool flash_write_word(uint8_t sector, uint32_t offset, uint32_t data) {
|
|
uint32_t *address = (uint32_t *)flash_get_address(sector, offset, 4);
|
|
if (address == NULL) {
|
|
return secfalse;
|
|
}
|
|
|
|
if (offset % 4 != 0) {
|
|
return secfalse;
|
|
}
|
|
|
|
if ((*address & data) != data) {
|
|
return secfalse;
|
|
}
|
|
|
|
svc_flash_program(FLASH_CR_PROGRAM_X32);
|
|
*(volatile uint32_t *)address = data;
|
|
|
|
if (*address != data) {
|
|
return secfalse;
|
|
}
|
|
|
|
return sectrue;
|
|
}
|