155 lines
4.2 KiB
C
155 lines
4.2 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 <assert.h>
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#include <zephyr.h>
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#include <gpio.h>
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#include <misc/__assert.h>
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#include <flash.h>
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#include <drivers/system_timer.h>
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#include <soc.h>
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#include "target.h"
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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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#include "flash_map_backend/flash_map_backend.h"
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#ifdef CONFIG_MCUBOOT_SERIAL
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#include "boot_serial/boot_serial.h"
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#include "serial_adapter/serial_adapter.h"
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const struct boot_uart_funcs boot_funcs = {
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.read = console_read,
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.write = console_write
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};
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#endif
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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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uintptr_t flash_base;
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int rc;
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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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rc = flash_device_base(rsp->br_flash_dev_id, &flash_base);
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assert(rc == 0);
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vt = (struct arm_vector_table *)(flash_base +
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rsp->br_image_off +
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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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__set_MSP(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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uintptr_t flash_base;
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void *start;
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int rc;
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rc = flash_device_base(rsp->br_flash_dev_id, &flash_base);
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assert(rc == 0);
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start = (void *)(flash_base + rsp->br_image_off +
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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_DEV_NAME);
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if (!boot_flash_device) {
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BOOT_LOG_ERR("Flash device %s not found", FLASH_DEV_NAME);
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while (1)
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;
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}
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#ifdef CONFIG_MCUBOOT_SERIAL
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struct device *detect_port;
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u32_t detect_value;
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detect_port = device_get_binding(CONFIG_BOOT_SERIAL_DETECT_PORT);
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__ASSERT(detect_port, "Error: Bad port for boot serial detection.\n");
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rc = gpio_pin_configure(detect_port, CONFIG_BOOT_SERIAL_DETECT_PIN,
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GPIO_DIR_IN | GPIO_PUD_PULL_UP);
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__ASSERT(rc == 0, "Error of boot detect pin initialization.\n");
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rc = gpio_pin_read(detect_port, CONFIG_BOOT_SERIAL_DETECT_PIN,
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&detect_value);
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__ASSERT(rc == 0, "Error of the reading the detect pin.\n");
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if (detect_value == CONFIG_BOOT_SERIAL_DETECT_PIN_VAL) {
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BOOT_LOG_INF("Enter the serial recovery mode");
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rc = boot_console_init();
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__ASSERT(rc == 0, "Error initializing boot console.\n");
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boot_serial_start(&boot_funcs);
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__ASSERT(0, "Bootloader serial process was terminated unexpectedly.\n");
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}
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#endif
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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 offset: 0x%x",
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rsp.br_image_off);
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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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