/* * 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 <assert.h> #include <stdlib.h> #include <string.h> #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_write(void) { return sectrue; } secbool flash_lock_write(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; }