mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-23 07:58:09 +00:00
141 lines
2.9 KiB
C
141 lines
2.9 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) 2017 Saleem Rashid <trezor@saleemrashid.com>
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*
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* This library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser 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 library 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <assert.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include "memory.h"
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void flash_lock(void) {
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sync();
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}
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void flash_unlock(void) {}
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void flash_clear_status_flags(void) {}
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void flash_lock_option_bytes(void) {}
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void flash_unlock_option_bytes(void) {}
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void flash_program_option_bytes(uint32_t data) {
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(void) data;
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}
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static ssize_t sector_to_offset(uint8_t sector) {
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switch (sector) {
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case 0:
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return 0x0;
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case 1:
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return 0x4000;
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case 2:
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return 0x8000;
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case 3:
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return 0xC000;
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case 4:
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return 0x10000;
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case 5:
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return 0x20000;
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case 6:
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return 0x40000;
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case 7:
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return 0x60000;
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case 8:
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return 0x80000;
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default:
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return -1;
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}
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}
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static void *sector_to_address(uint8_t sector) {
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ssize_t offset = sector_to_offset(sector);
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if (offset < 0) {
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return NULL;
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}
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return (void *) FLASH_PTR(FLASH_ORIGIN + offset);
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}
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static ssize_t sector_to_size(uint8_t sector) {
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ssize_t start = sector_to_offset(sector);
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if (start < 0) {
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return -1;
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}
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ssize_t end = sector_to_offset(sector + 1);
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if (end < 0) {
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return -1;
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}
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return end - start;
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}
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void flash_erase_sector(uint8_t sector, uint32_t program_size) {
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(void) program_size;
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void *address = sector_to_address(sector);
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if (address == NULL) {
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return;
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}
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ssize_t size = sector_to_size(sector);
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if (size < 0) {
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return;
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}
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memset(address, 0xFF, size);
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}
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void flash_erase_all_sectors(uint32_t program_size) {
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(void) program_size;
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memset(emulator_flash_base, 0xFF, FLASH_TOTAL_SIZE);
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}
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void flash_program_word(uint32_t address, uint32_t data) {
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*(volatile uint32_t *)FLASH_PTR(address) = data;
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}
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void flash_program_byte(uint32_t address, uint8_t data) {
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*(volatile uint8_t *)FLASH_PTR(address) = data;
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}
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static bool flash_locked = true;
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void svc_flash_unlock(void) {
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assert (flash_locked);
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flash_locked = false;
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}
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void svc_flash_program(uint32_t size) {
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(void) size;
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assert (!flash_locked);
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}
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void svc_flash_erase_sector(uint16_t sector) {
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assert (!flash_locked);
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assert (sector >= FLASH_META_SECTOR_FIRST &&
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sector <= FLASH_META_SECTOR_LAST);
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flash_erase_sector(sector, 3);
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}
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uint32_t svc_flash_lock(void) {
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assert (!flash_locked);
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flash_locked = true;
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sync();
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return 0;
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}
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