/*
* 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
#include
#include
#include "common.h"
#include "flash.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, // - 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 uint32_t FLASH_SIZE = 0x200000;
uint8_t *FLASH_BUFFER = NULL;
void flash_init(void) {
assert(FLASH_SIZE ==
FLASH_SECTOR_TABLE[FLASH_SECTOR_COUNT] - FLASH_SECTOR_TABLE[0]);
}
secbool flash_unlock(void) { return sectrue; }
secbool flash_lock(void) { 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 FLASH_BUFFER + addr - FLASH_SECTOR_TABLE[0];
}
secbool flash_erase_sectors(const uint8_t *sectors, int len,
void (*progress)(int pos, int len)) {
if (progress) {
progress(0, len);
}
for (int i = 0; i < len; i++) {
const uint8_t sector = sectors[i];
const uint32_t offset = FLASH_SECTOR_TABLE[sector] - FLASH_SECTOR_TABLE[0];
const uint32_t size =
FLASH_SECTOR_TABLE[sector + 1] - FLASH_SECTOR_TABLE[sector];
memset(FLASH_BUFFER + offset, 0xFF, size);
if (progress) {
progress(i + 1, len);
}
}
return sectrue;
}
secbool flash_write_byte(uint8_t sector, uint32_t offset, uint8_t data) {
uint8_t *flash = (uint8_t *)flash_get_address(sector, offset, 1);
if (!flash) {
return secfalse;
}
if ((flash[0] & data) != data) {
return secfalse; // we cannot change zeroes to ones
}
flash[0] = data;
return sectrue;
}
secbool flash_write_word(uint8_t sector, uint32_t offset, uint32_t data) {
if (offset % 4) { // we write only at 4-byte boundary
return secfalse;
}
uint32_t *flash = (uint32_t *)flash_get_address(sector, offset, sizeof(data));
if (!flash) {
return secfalse;
}
if ((flash[0] & data) != data) {
return secfalse; // we cannot change zeroes to ones
}
flash[0] = data;
return sectrue;
}