mirror of
https://github.com/trezor/trezor-firmware.git
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46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* This file is part of the TREZOR project.
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*
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* Copyright (C) 2014 Pavol Rusnak <stick@satoshilabs.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 <libopencm3/stm32/flash.h>
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#include <stdint.h>
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#include "memory.h"
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#include "sha2.h"
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#define OPTION_BYTES_1 ((uint64_t *)0x1FFFC000)
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#define OPTION_BYTES_2 ((uint64_t *)0x1FFFC008)
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void memory_protect(void)
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{
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// set RDP level 2 WRP for sectors 0 and 1
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if ((((*OPTION_BYTES_1) & 0xFFFF) == 0xCCFF) && (((*OPTION_BYTES_2) & 0xFFFF) == 0xFFFC)) {
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return; // already set up correctly - bail out
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}
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flash_unlock_option_bytes();
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// WRP + RDP
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flash_program_option_bytes(0xFFFC0000 + 0xCCFF);
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flash_lock_option_bytes();
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}
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int memory_bootloader_hash(uint8_t *hash)
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{
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sha256_Raw((const uint8_t *)FLASH_BOOT_START, FLASH_BOOT_LEN, hash);
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sha256_Raw(hash, 32, hash);
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return 32;
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}
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