103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* Copyright (c) 2012-2014 Wind River Systems, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <zephyr.h>
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#include <flash.h>
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#include <asm_inline.h>
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#include <drivers/system_timer.h>
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#include "target.h"
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#define BOOT_LOG_LEVEL BOOT_LOG_LEVEL_INFO
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#include "bootutil/bootutil_log.h"
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#include "bootutil/image.h"
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#include "bootutil/bootutil.h"
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struct device *boot_flash_device;
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void os_heap_init(void);
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#if defined(CONFIG_ARM)
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struct arm_vector_table {
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uint32_t msp;
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uint32_t reset;
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};
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static void do_boot(struct boot_rsp *rsp)
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{
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struct arm_vector_table *vt;
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/* The beginning of the image is the ARM vector table, containing
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* the initial stack pointer address and the reset vector
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* consecutively. Manually set the stack pointer and jump into the
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* reset vector
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*/
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vt = (struct arm_vector_table *)(rsp->br_image_addr +
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rsp->br_hdr->ih_hdr_size);
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irq_lock();
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sys_clock_disable();
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_MspSet(vt->msp);
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((void (*)(void))vt->reset)();
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}
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#else
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/* Default: Assume entry point is at the very beginning of the image. Simply
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* lock interrupts and jump there. This is the right thing to do for X86 and
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* possibly other platforms.
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*/
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static void do_boot(struct boot_rsp *rsp)
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{
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void *start;
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start = (void *)(rsp->br_image_addr + rsp->br_hdr->ih_hdr_size);
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/* Lock interrupts and dive into the entry point */
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irq_lock();
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((void (*)(void))start)();
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}
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#endif
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void main(void)
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{
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struct boot_rsp rsp;
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int rc;
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BOOT_LOG_INF("Starting bootloader");
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os_heap_init();
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boot_flash_device = device_get_binding(FLASH_DRIVER_NAME);
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if (!boot_flash_device) {
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BOOT_LOG_ERR("Flash device not found");
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while (1)
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;
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}
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rc = boot_go(&rsp);
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if (rc != 0) {
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BOOT_LOG_ERR("Unable to find bootable image");
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while (1)
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;
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}
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BOOT_LOG_INF("Bootloader chainload address: 0x%x", rsp.br_image_addr);
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BOOT_LOG_INF("Jumping to the first image slot");
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do_boot(&rsp);
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BOOT_LOG_ERR("Never should get here");
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while (1)
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;
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}
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