mirror of https://github.com/wolfSSL/wolfBoot.git
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
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/* loader_stage1.c
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*
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* Copyright (C) 2023 wolfSSL Inc.
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*
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* This file is part of wolfBoot.
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*
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* wolfBoot 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 2 of the License, or
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* (at your option) any later version.
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*
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* wolfBoot 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA
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*/
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/* A stage 1 loader to copy wolfBoot from flash to RAM location */
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#include "loader.h"
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#include "image.h"
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#include "hal.h"
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#include "spi_flash.h"
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#include "printf.h"
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#include "wolfboot/wolfboot.h"
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#include "string.h"
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#include <stdint.h>
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#ifndef EXT_FLASH
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#error The stage1 loader only supports use with external flash
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#endif
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#ifndef WOLFBOOT_STAGE1_SIZE
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#define WOLFBOOT_STAGE1_SIZE (4*1024)
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#endif
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#ifdef BUILD_LOADER_STAGE1
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#if defined(WOLFBOOT_ARCH) && WOLFBOOT_ARCH == PPC
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#include "hal/nxp_ppc.h"
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#endif
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int main(void)
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{
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int ret = -1;
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__attribute__((noreturn)) void (*wolfboot_start)(void);
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hal_init();
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spi_flash_probe(); /* make sure external flash is initialized */
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#ifdef PRINTF_ENABLED
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wolfBoot_printf("Loader Stage 1: Flash 0x%x to RAM 0x%x\r\n",
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WOLFBOOT_ORIGIN, WOLFBOOT_STAGE1_LOAD_ADDR);
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#elif defined(DEBUG_UART)
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uart_write("Loader Stage 1\r\n", 16);
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#endif
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#ifdef BOOT_ROM_ADDR
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/* if this is executing from boot 4KB region (FCM buffer) it must
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* first be relocated to RAM before the eLBC NAND can be read */
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if (((uintptr_t)&hal_init & BOOT_ROM_ADDR) == BOOT_ROM_ADDR) {
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wolfboot_start = (void*)WOLFBOOT_STAGE1_BASE_ADDR + BOOT_ROM_SIZE - 0x04;
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/* relocate 4KB code to DST and jump */
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memmove((void*)WOLFBOOT_STAGE1_BASE_ADDR, (void*)BOOT_ROM_ADDR,
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BOOT_ROM_SIZE);
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wolfboot_start(); /* never returns */
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}
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#endif
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ret = ext_flash_read(
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(uintptr_t)WOLFBOOT_ORIGIN, /* flash offset */
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(uint8_t*)WOLFBOOT_STAGE1_LOAD_ADDR,/* ram destination */
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BOOTLOADER_PARTITION_SIZE /* boot-loader partition (entire) */
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);
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if (ret >= 0) {
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wolfboot_start = (void*)WOLFBOOT_STAGE1_LOAD_ADDR;
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#ifdef PRINTF_ENABLED
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wolfBoot_printf("Jumping to %p\r\n", wolfboot_start);
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#elif defined(DEBUG_UART)
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uart_write("Jump to relocated wolfboot_start\r\n", 34);
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#endif
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wolfboot_start(); /* never returns */
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}
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return 0;
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}
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#endif /* BUILD_LOADER_STAGE1 */
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