trezor-firmware/firmware/fastflash.c

/*
 * This file is part of the TREZOR project, https://trezor.io/
 *
 * Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
 *
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This library 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "fastflash.h"
#include "util.h"

#include <stdbool.h>
#include <stdint.h>
#include <string.h>

#define bootloader_vec ((vector_table_t *) 0x20000000)

void __attribute__((noreturn)) run_bootloader(void)
{
	extern uint8_t __bootloader_start__[];
	extern uint8_t __bootloader_size__[];

	// zero out SRAM
	memset_reg(_ram_start, _ram_end, 0);

	// copy bootloader
	memcpy(bootloader_vec, __bootloader_start__, (size_t) __bootloader_size__);

	jump_to_firmware(bootloader_vec, FW_TRUSTED);
}