mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-15 10:58:09 +00:00
120 lines
4.0 KiB
C
120 lines
4.0 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 <assert.h>
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#include <stdlib.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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static const uint32_t FLASH_START = 0x08000000;
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static const uint32_t FLASH_END = 0x08200000;
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static const uint32_t FLASH_SECTOR_TABLE[FLASH_SECTOR_COUNT + 1] = {
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[0] = FLASH_START, // - 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] = FLASH_END, // last element - not a valid sector
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};
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const uint32_t FLASH_SIZE = FLASH_END - FLASH_START;
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uint8_t *FLASH_BUFFER = NULL;
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secbool flash_unlock(void) { return sectrue; }
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secbool flash_lock(void) { return sectrue; }
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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 FLASH_BUFFER + addr - FLASH_SECTOR_TABLE[0];
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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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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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const uint8_t sector = sectors[i];
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const uint32_t offset = FLASH_SECTOR_TABLE[sector] - FLASH_SECTOR_TABLE[0];
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const uint32_t size =
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FLASH_SECTOR_TABLE[sector + 1] - FLASH_SECTOR_TABLE[sector];
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memset(FLASH_BUFFER + offset, 0xFF, size);
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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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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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uint8_t *flash = (uint8_t *)flash_get_address(sector, offset, 1);
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if (!flash) {
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return secfalse;
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}
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if ((flash[0] & data) != data) {
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return secfalse; // we cannot change zeroes to ones
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}
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flash[0] = data;
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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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if (offset % 4) { // we write only at 4-byte boundary
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return secfalse;
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}
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uint32_t *flash = (uint32_t *)flash_get_address(sector, offset, sizeof(data));
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if (!flash) {
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return secfalse;
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}
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if ((flash[0] & data) != data) {
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return secfalse; // we cannot change zeroes to ones
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}
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flash[0] = data;
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return sectrue;
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}
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