mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 23:48:12 +00:00
221 lines
6.8 KiB
C
221 lines
6.8 KiB
C
/*
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* This file is part of the TREZOR project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include STM32_HAL_H
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#include <string.h>
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#include "common.h"
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#include "flash.h"
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// see docs/memory.md for more information
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static const uint32_t FLASH_SECTOR_TABLE[FLASH_SECTOR_COUNT + 1] = {
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[0] = 0x08000000, // - 0x08003FFF | 16 KiB
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[1] = 0x08004000, // - 0x08007FFF | 16 KiB
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[2] = 0x08008000, // - 0x0800BFFF | 16 KiB
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[3] = 0x0800C000, // - 0x0800FFFF | 16 KiB
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[4] = 0x08010000, // - 0x0801FFFF | 64 KiB
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[5] = 0x08020000, // - 0x0803FFFF | 128 KiB
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[6] = 0x08040000, // - 0x0805FFFF | 128 KiB
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[7] = 0x08060000, // - 0x0807FFFF | 128 KiB
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[8] = 0x08080000, // - 0x0809FFFF | 128 KiB
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[9] = 0x080A0000, // - 0x080BFFFF | 128 KiB
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[10] = 0x080C0000, // - 0x080DFFFF | 128 KiB
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[11] = 0x080E0000, // - 0x080FFFFF | 128 KiB
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[12] = 0x08100000, // - 0x08103FFF | 16 KiB
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[13] = 0x08104000, // - 0x08107FFF | 16 KiB
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[14] = 0x08108000, // - 0x0810BFFF | 16 KiB
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[15] = 0x0810C000, // - 0x0810FFFF | 16 KiB
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[16] = 0x08110000, // - 0x0811FFFF | 64 KiB
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[17] = 0x08120000, // - 0x0813FFFF | 128 KiB
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[18] = 0x08140000, // - 0x0815FFFF | 128 KiB
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[19] = 0x08160000, // - 0x0817FFFF | 128 KiB
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[20] = 0x08180000, // - 0x0819FFFF | 128 KiB
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[21] = 0x081A0000, // - 0x081BFFFF | 128 KiB
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[22] = 0x081C0000, // - 0x081DFFFF | 128 KiB
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[23] = 0x081E0000, // - 0x081FFFFF | 128 KiB
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[24] = 0x08200000, // last element - not a valid sector
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};
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const uint8_t FIRMWARE_SECTORS[FIRMWARE_SECTORS_COUNT] = {
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FLASH_SECTOR_FIRMWARE_START,
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7,
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8,
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9,
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10,
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FLASH_SECTOR_FIRMWARE_END,
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FLASH_SECTOR_FIRMWARE_EXTRA_START,
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18,
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19,
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20,
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21,
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22,
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FLASH_SECTOR_FIRMWARE_EXTRA_END,
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};
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const uint8_t STORAGE_SECTORS[STORAGE_SECTORS_COUNT] = {
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FLASH_SECTOR_STORAGE_1,
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FLASH_SECTOR_STORAGE_2,
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};
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void flash_init(void) {}
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secbool flash_unlock_write(void) {
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HAL_FLASH_Unlock();
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FLASH->SR |= FLASH_STATUS_ALL_FLAGS; // clear all status flags
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return sectrue;
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}
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secbool flash_lock_write(void) {
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HAL_FLASH_Lock();
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return sectrue;
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}
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const void *flash_get_address(uint8_t sector, uint32_t offset, uint32_t size) {
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if (sector >= FLASH_SECTOR_COUNT) {
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return NULL;
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}
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const uint32_t addr = FLASH_SECTOR_TABLE[sector] + offset;
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const uint32_t next = FLASH_SECTOR_TABLE[sector + 1];
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if (addr + size > next) {
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return NULL;
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}
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return (const void *)addr;
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}
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secbool flash_erase_sectors(const uint8_t *sectors, int len,
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void (*progress)(int pos, int len)) {
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ensure(flash_unlock_write(), NULL);
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FLASH_EraseInitTypeDef EraseInitStruct;
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EraseInitStruct.TypeErase = FLASH_TYPEERASE_SECTORS;
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EraseInitStruct.VoltageRange = FLASH_VOLTAGE_RANGE_3;
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EraseInitStruct.NbSectors = 1;
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if (progress) {
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progress(0, len);
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}
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for (int i = 0; i < len; i++) {
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EraseInitStruct.Sector = sectors[i];
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uint32_t SectorError;
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if (HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError) != HAL_OK) {
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ensure(flash_lock_write(), NULL);
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return secfalse;
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}
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// check whether the sector was really deleted (contains only 0xFF)
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const uint32_t addr_start = FLASH_SECTOR_TABLE[sectors[i]],
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addr_end = FLASH_SECTOR_TABLE[sectors[i] + 1];
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for (uint32_t addr = addr_start; addr < addr_end; addr += 4) {
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if (*((const uint32_t *)addr) != 0xFFFFFFFF) {
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ensure(flash_lock_write(), NULL);
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return secfalse;
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}
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}
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if (progress) {
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progress(i + 1, len);
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}
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}
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ensure(flash_lock_write(), NULL);
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return sectrue;
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}
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secbool flash_write_byte(uint8_t sector, uint32_t offset, uint8_t data) {
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uint32_t address = (uint32_t)flash_get_address(sector, offset, 1);
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if (address == 0) {
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return secfalse;
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}
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if (data != (data & *((const uint8_t *)address))) {
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return secfalse;
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}
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if (HAL_OK != HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, address, data)) {
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return secfalse;
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}
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if (data != *((const uint8_t *)address)) {
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return secfalse;
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}
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return sectrue;
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}
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secbool flash_write_word(uint8_t sector, uint32_t offset, uint32_t data) {
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uint32_t address = (uint32_t)flash_get_address(sector, offset, 4);
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if (address == 0) {
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return secfalse;
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}
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if (offset % sizeof(uint32_t)) { // we write only at 4-byte boundary
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return secfalse;
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}
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if (data != (data & *((const uint32_t *)address))) {
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return secfalse;
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}
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if (HAL_OK != HAL_FLASH_Program(FLASH_TYPEPROGRAM_WORD, address, data)) {
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return secfalse;
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}
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if (data != *((const uint32_t *)address)) {
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return secfalse;
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}
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return sectrue;
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}
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#define FLASH_OTP_LOCK_BASE 0x1FFF7A00U
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secbool flash_otp_read(uint8_t block, uint8_t offset, uint8_t *data,
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uint8_t datalen) {
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if (block >= FLASH_OTP_NUM_BLOCKS ||
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offset + datalen > FLASH_OTP_BLOCK_SIZE) {
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return secfalse;
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}
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for (uint8_t i = 0; i < datalen; i++) {
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data[i] = *(__IO uint8_t *)(FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE +
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offset + i);
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}
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return sectrue;
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}
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secbool flash_otp_write(uint8_t block, uint8_t offset, const uint8_t *data,
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uint8_t datalen) {
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if (block >= FLASH_OTP_NUM_BLOCKS ||
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offset + datalen > FLASH_OTP_BLOCK_SIZE) {
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return secfalse;
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}
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ensure(flash_unlock_write(), NULL);
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for (uint8_t i = 0; i < datalen; i++) {
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uint32_t address =
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FLASH_OTP_BASE + block * FLASH_OTP_BLOCK_SIZE + offset + i;
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ensure(sectrue * (HAL_OK == HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE,
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address, data[i])),
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NULL);
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}
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ensure(flash_lock_write(), NULL);
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return sectrue;
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}
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secbool flash_otp_lock(uint8_t block) {
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if (block >= FLASH_OTP_NUM_BLOCKS) {
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return secfalse;
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}
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ensure(flash_unlock_write(), NULL);
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HAL_StatusTypeDef ret = HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE,
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FLASH_OTP_LOCK_BASE + block, 0x00);
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ensure(flash_lock_write(), NULL);
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return sectrue * (ret == HAL_OK);
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}
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secbool flash_otp_is_locked(uint8_t block) {
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return sectrue * (0x00 == *(__IO uint8_t *)(FLASH_OTP_LOCK_BASE + block));
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}
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