/*
* 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 .
*/
#include STM32_HAL_H
#include
#include "common.h"
#include "flash.h"
// see docs/memory.md for more information
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, // - 0x08103FFF | 16 KiB
[13] = 0x08104000, // - 0x08107FFF | 16 KiB
[14] = 0x08108000, // - 0x0810BFFF | 16 KiB
[15] = 0x0810C000, // - 0x0810FFFF | 16 KiB
[16] = 0x08110000, // - 0x0811FFFF | 64 KiB
[17] = 0x08120000, // - 0x0813FFFF | 128 KiB
[18] = 0x08140000, // - 0x0815FFFF | 128 KiB
[19] = 0x08160000, // - 0x0817FFFF | 128 KiB
[20] = 0x08180000, // - 0x0819FFFF | 128 KiB
[21] = 0x081A0000, // - 0x081BFFFF | 128 KiB
[22] = 0x081C0000, // - 0x081DFFFF | 128 KiB
[23] = 0x081E0000, // - 0x081FFFFF | 128 KiB
[24] = 0x08200000, // last element - not a valid sector
};
const uint8_t FIRMWARE_SECTORS [FIRMWARE_SECTORS_COUNT] = {
FLASH_SECTOR_FIRMWARE_START,
7,
8,
9,
10,
FLASH_SECTOR_FIRMWARE_END,
FLASH_SECTOR_FIRMWARE_EXTRA_START,
18,
19,
20,
21,
22,
FLASH_SECTOR_FIRMWARE_EXTRA_END,
};
const uint8_t STORAGE_SECTORS[STORAGE_SECTORS_COUNT] = {
FLASH_SECTOR_STORAGE_1,
FLASH_SECTOR_STORAGE_2,
};
void flash_init(void)
{
}
secbool flash_unlock_write(void)
{
HAL_FLASH_Unlock();
FLASH->SR |= FLASH_STATUS_ALL_FLAGS; // clear all status flags
return sectrue;
}
secbool flash_lock_write(void)
{
HAL_FLASH_Lock();
return sectrue;
}
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 *)addr;
}
secbool flash_erase_sectors(const uint8_t *sectors, int len, void (*progress)(int pos, int len))
{
ensure(flash_unlock_write(), NULL);
FLASH_EraseInitTypeDef EraseInitStruct;
EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;
EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;
EraseInitStruct.NbSectors = 1;
if (progress) {
progress(0, len);
}
for (int i = 0; i < len; i++) {
EraseInitStruct.Sector = sectors[i];
uint32_t SectorError;
if (HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError) != HAL_OK) {
ensure(flash_lock_write(), NULL);
return secfalse;
}
// check whether the sector was really deleted (contains only 0xFF)
const uint32_t addr_start = FLASH_SECTOR_TABLE[sectors[i]], addr_end = FLASH_SECTOR_TABLE[sectors[i] + 1];
for (uint32_t addr = addr_start; addr < addr_end; addr += 4) {
if (*((const uint32_t *)addr) != 0xFFFFFFFF) {
ensure(flash_lock_write(), NULL);
return secfalse;
}
}
if (progress) {
progress(i + 1, len);
}
}
ensure(flash_lock_write(), NULL);
return sectrue;
}
secbool flash_write_byte(uint8_t sector, uint32_t offset, uint8_t data)
{
uint32_t address = (uint32_t)flash_get_address(sector, offset, 1);
if (address == 0) {
return secfalse;
}
if (data != (data & *((const uint8_t *)address))) {
return secfalse;
}
if (HAL_OK != HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, address, data)) {
return secfalse;
}
if (data != *((const uint8_t *)address)) {
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 == 0) {
return secfalse;
}
if (offset % sizeof(uint32_t)) { // we write only at 4-byte boundary
return secfalse;
}
if (data != (data & *((const uint32_t *)address))) {
return secfalse;
}
if (HAL_OK != HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data)) {
return secfalse;
}
if (data != *((const uint32_t *)address)) {
return secfalse;
}
return sectrue;
}
#define FLASH_OTP_LOCK_BASE 0x1FFF7A00U
secbool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data, uint8_t datalen)
{
if (block >= FLASH_OTP_NUM_BLOCKS || offset + datalen > FLASH_OTP_BLOCK_SIZE) {
return secfalse;
}
for (uint8_t i = 0; i < datalen; i++) {
data[i] = *(__IO uint8_t *)(FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE + offset + i);
}
return sectrue;
}
secbool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data, uint8_t datalen)
{
if (block >= FLASH_OTP_NUM_BLOCKS || offset + datalen > FLASH_OTP_BLOCK_SIZE) {
return secfalse;
}
ensure(flash_unlock_write(), NULL);
for (uint8_t i = 0; i < datalen; i++) {
uint32_t address = FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE + offset + i;
ensure(sectrue * (HAL_OK == HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, address, data[i])), NULL);
}
ensure(flash_lock_write(), NULL);
return sectrue;
}
secbool flash_otp_lock(uint8_t block)
{
if (block >= FLASH_OTP_NUM_BLOCKS) {
return secfalse;
}
ensure(flash_unlock_write(), NULL);
HAL_StatusTypeDef ret = HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, FLASH_OTP_LOCK_BASE + block, 0x00);
ensure(flash_lock_write(), NULL);
return sectrue * (ret == HAL_OK);
}
secbool flash_otp_is_locked(uint8_t block)
{
return sectrue * (0x00 == *(__IO uint8_t *)(FLASH_OTP_LOCK_BASE + block));
}