511 lines
12 KiB
C
511 lines
12 KiB
C
/*
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* (C) Copyright 2000-2006
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program 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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*/
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/*
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* Boot support
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*/
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#include <common.h>
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#include <driver.h>
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#include <command.h>
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#include <image.h>
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#include <malloc.h>
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#include <environment.h>
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#include <asm/byteorder.h>
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#include <xfuncs.h>
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#include <getopt.h>
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#include <fcntl.h>
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#include <fs.h>
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#include <errno.h>
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#include <boot.h>
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#include <of.h>
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#include <rtc.h>
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#include <init.h>
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#include <of.h>
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#include <magicvar.h>
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#include <uncompress.h>
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#include <memory.h>
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#include <filetype.h>
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#include <binfmt.h>
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#include <globalvar.h>
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#include <magicvar.h>
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#include <asm-generic/memory_layout.h>
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static LIST_HEAD(handler_list);
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/*
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* Additional oftree size for the fixed tree
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*/
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#define OFTREE_SIZE_INCREASE 0x8000
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int register_image_handler(struct image_handler *handler)
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{
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list_add_tail(&handler->list, &handler_list);
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return 0;
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}
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#define UIMAGE_SOME_ADDRESS (UIMAGE_INVALID_ADDRESS - 1)
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static int bootm_open_os_uimage(struct image_data *data)
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{
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int ret;
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data->os = uimage_open(data->os_file);
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if (!data->os)
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return -EINVAL;
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if (data->verify) {
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ret = uimage_verify(data->os);
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if (ret) {
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printf("Checking data crc failed with %s\n",
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strerror(-ret));
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uimage_close(data->os);
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return ret;
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}
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}
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uimage_print_contents(data->os);
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if (data->os->header.ih_arch != IH_ARCH) {
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printf("Unsupported Architecture 0x%x\n",
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data->os->header.ih_arch);
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uimage_close(data->os);
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return -EINVAL;
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}
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if (data->os_address == UIMAGE_SOME_ADDRESS)
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data->os_address = data->os->header.ih_load;
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if (data->os_address != UIMAGE_INVALID_ADDRESS) {
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data->os_res = uimage_load_to_sdram(data->os, 0,
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data->os_address);
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if (!data->os_res) {
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uimage_close(data->os);
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return -ENOMEM;
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}
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}
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return 0;
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}
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static int bootm_open_initrd_uimage(struct image_data *data)
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{
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int ret;
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if (!data->initrd_file)
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return 0;
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if (strcmp(data->os_file, data->initrd_file)) {
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data->initrd = uimage_open(data->initrd_file);
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if (!data->initrd)
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return -EINVAL;
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if (data->verify) {
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ret = uimage_verify(data->initrd);
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if (ret) {
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printf("Checking data crc failed with %s\n",
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strerror(-ret));
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}
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}
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uimage_print_contents(data->initrd);
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} else {
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data->initrd = data->os;
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}
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if (data->initrd_address == UIMAGE_SOME_ADDRESS)
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data->initrd_address = data->initrd->header.ih_load;
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return 0;
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}
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#ifdef CONFIG_OFTREE
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static int bootm_open_oftree(struct image_data *data, const char *oftree, int num)
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{
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enum filetype ft;
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struct fdt_header *fdt;
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size_t size;
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printf("Loading devicetree from '%s'\n", oftree);
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ft = file_name_detect_type(oftree);
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if ((int)ft < 0) {
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printf("failed to open %s: %s\n", oftree, strerror(-(int)ft));
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return ft;
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}
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if (ft == filetype_uimage) {
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#ifdef CONFIG_CMD_BOOTM_OFTREE_UIMAGE
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struct uimage_handle *of_handle;
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int release = 0;
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if (!strcmp(data->os_file, oftree)) {
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of_handle = data->os;
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} else if (!strcmp(data->initrd_file, oftree)) {
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of_handle = data->initrd;
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} else {
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of_handle = uimage_open(oftree);
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if (!of_handle)
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return -ENODEV;
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uimage_print_contents(of_handle);
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release = 1;
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}
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fdt = uimage_load_to_buf(of_handle, num, &size);
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if (release)
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uimage_close(of_handle);
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#else
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return -EINVAL;
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#endif
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} else {
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fdt = read_file(oftree, &size);
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if (!fdt) {
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perror("open");
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return -ENODEV;
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}
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}
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ft = file_detect_type(fdt, size);
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if (ft != filetype_oftree) {
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printf("%s is not an oftree but %s\n", oftree,
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file_type_to_string(ft));
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}
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data->of_root_node = of_unflatten_dtb(NULL, fdt);
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if (!data->of_root_node) {
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pr_err("unable to unflatten devicetree\n");
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return -EINVAL;
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}
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free(fdt);
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return 0;
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}
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#endif
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static struct image_handler *bootm_find_handler(enum filetype filetype,
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struct image_data *data)
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{
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struct image_handler *handler;
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list_for_each_entry(handler, &handler_list, list) {
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if (filetype != filetype_uimage &&
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handler->filetype == filetype)
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return handler;
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if (filetype == filetype_uimage &&
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handler->ih_os == data->os->header.ih_os)
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return handler;
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}
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return NULL;
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}
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static char *bootm_image_name_and_no(const char *name, int *no)
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{
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char *at, *ret;
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if (!name || !*name)
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return NULL;
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*no = 0;
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ret = xstrdup(name);
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at = strchr(ret, '@');
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if (!at)
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return ret;
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*at++ = 0;
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*no = simple_strtoul(at, NULL, 10);
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return ret;
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}
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#define BOOTM_OPTS_COMMON "ca:e:vo:f"
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#ifdef CONFIG_CMD_BOOTM_INITRD
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#define BOOTM_OPTS BOOTM_OPTS_COMMON "L:r:"
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#else
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#define BOOTM_OPTS BOOTM_OPTS_COMMON
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#endif
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static int do_bootm(int argc, char *argv[])
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{
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int opt;
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struct image_handler *handler;
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struct image_data data;
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int ret = 1;
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enum filetype os_type, initrd_type = filetype_unknown;
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const char *oftree = NULL, *initrd_file = NULL, *os_file = NULL;
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int fallback = 0;
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memset(&data, 0, sizeof(struct image_data));
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data.initrd_address = UIMAGE_SOME_ADDRESS;
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data.os_address = UIMAGE_SOME_ADDRESS;
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data.verify = 0;
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data.verbose = 0;
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oftree = getenv("global.bootm.oftree");
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os_file = getenv("global.bootm.image");
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if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD))
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initrd_file = getenv("global.bootm.initrd");
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while ((opt = getopt(argc, argv, BOOTM_OPTS)) > 0) {
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switch(opt) {
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case 'c':
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data.verify = 1;
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break;
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#ifdef CONFIG_CMD_BOOTM_INITRD
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case 'L':
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data.initrd_address = simple_strtoul(optarg, NULL, 0);
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break;
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case 'r':
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initrd_file = optarg;
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break;
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#endif
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case 'a':
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data.os_address = simple_strtoul(optarg, NULL, 0);
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break;
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case 'e':
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data.os_entry = simple_strtoul(optarg, NULL, 0);
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break;
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case 'v':
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data.verbose++;
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break;
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case 'o':
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oftree = optarg;
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break;
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case 'f':
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fallback = 1;
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break;
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default:
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break;
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}
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}
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if (optind != argc)
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os_file = argv[optind];
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if (!os_file || !*os_file) {
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printf("no boot image given\n");
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goto err_out;
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}
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if (initrd_file && !*initrd_file)
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initrd_file = NULL;
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if (oftree && !*oftree)
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oftree = NULL;
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data.os_file = bootm_image_name_and_no(os_file, &data.os_num);
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os_type = file_name_detect_type(data.os_file);
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if ((int)os_type < 0) {
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printf("could not open %s: %s\n", data.os_file,
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strerror(-os_type));
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goto err_out;
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}
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if (!fallback && os_type == filetype_unknown) {
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printf("Unknown OS filetype (try -f)\n");
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goto err_out;
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}
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if (os_type == filetype_uimage) {
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ret = bootm_open_os_uimage(&data);
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if (ret) {
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printf("loading os image failed with %s\n",
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strerror(-ret));
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goto err_out;
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}
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}
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if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD) && initrd_file) {
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data.initrd_file = bootm_image_name_and_no(initrd_file, &data.initrd_num);
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initrd_type = file_name_detect_type(data.initrd_file);
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if ((int)initrd_type < 0) {
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printf("could not open %s: %s\n", data.initrd_file,
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strerror(-initrd_type));
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goto err_out;
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}
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if (initrd_type == filetype_uimage) {
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ret = bootm_open_initrd_uimage(&data);
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if (ret) {
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printf("loading initrd failed with %s\n",
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strerror(-ret));
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goto err_out;
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}
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}
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}
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printf("\nLoading OS %s '%s'", file_type_to_string(os_type),
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data.os_file);
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if (os_type == filetype_uimage &&
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data.os->header.ih_type == IH_TYPE_MULTI)
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printf(", multifile image %d", data.os_num);
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printf("\n");
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if (bootm_verbose(&data)) {
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if (data.os_res)
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printf("OS image is at 0x%08x-0x%08x\n",
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data.os_res->start,
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data.os_res->end);
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else
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printf("OS image not yet relocated\n");
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if (data.initrd_file) {
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printf("Loading initrd %s '%s'",
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file_type_to_string(initrd_type),
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data.initrd_file);
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if (initrd_type == filetype_uimage &&
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data.initrd->header.ih_type == IH_TYPE_MULTI)
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printf(", multifile image %d", data.initrd_num);
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printf("\n");
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if (data.initrd_res)
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printf("initrd is at 0x%08x-0x%08x\n",
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data.initrd_res->start,
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data.initrd_res->end);
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else
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printf("initrd image not yet relocated\n");
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}
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}
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#ifdef CONFIG_OFTREE
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if (oftree) {
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int oftree_num;
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oftree = bootm_image_name_and_no(oftree, &oftree_num);
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ret = bootm_open_oftree(&data, oftree, oftree_num);
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if (ret)
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goto err_out;
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} else {
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data.of_root_node = of_get_root_node();
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if (bootm_verbose(&data) && data.of_root_node)
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printf("using internal devicetree\n");
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}
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if (bootm_verbose(&data) > 1 && data.of_root_node)
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of_print_nodes(data.of_root_node, 0);
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#endif
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if (data.os_address == UIMAGE_SOME_ADDRESS)
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data.os_address = UIMAGE_INVALID_ADDRESS;
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if (data.initrd_address == UIMAGE_SOME_ADDRESS)
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data.initrd_address = UIMAGE_INVALID_ADDRESS;
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handler = bootm_find_handler(os_type, &data);
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if (!handler) {
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printf("no image handler found for image type %s\n",
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file_type_to_string(os_type));
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if (os_type == filetype_uimage)
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printf("and os type: %d\n", data.os->header.ih_os);
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goto err_out;
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}
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if (bootm_verbose(&data))
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printf("Passing control to %s handler\n", handler->name);
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ret = handler->bootm(&data);
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printf("handler failed with %s\n", strerror(-ret));
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err_out:
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free(data.initrd_file);
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free(data.os_file);
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if (data.os_res)
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release_sdram_region(data.os_res);
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if (data.initrd_res)
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release_sdram_region(data.initrd_res);
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if (data.initrd && data.initrd != data.os)
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uimage_close(data.initrd);
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if (data.os)
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uimage_close(data.os);
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return 1;
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}
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static int bootm_init(void)
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{
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globalvar_add_simple("bootm.image");
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globalvar_add_simple("bootm.oftree");
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if (IS_ENABLED(CONFIG_CMD_BOOTM_INITRD))
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globalvar_add_simple("bootm.initrd");
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return 0;
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}
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late_initcall(bootm_init);
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BAREBOX_CMD_HELP_START(bootm)
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BAREBOX_CMD_HELP_USAGE("bootm [OPTIONS] image\n")
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BAREBOX_CMD_HELP_SHORT("Boot an application image.\n")
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BAREBOX_CMD_HELP_OPT ("-c", "crc check uImage data\n")
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#ifdef CONFIG_CMD_BOOTM_INITRD
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BAREBOX_CMD_HELP_OPT ("-r <initrd>","specify an initrd image\n")
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BAREBOX_CMD_HELP_OPT ("-L <load addr>","specify initrd load address\n")
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#endif
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BAREBOX_CMD_HELP_OPT ("-a <load addr>","specify os load address\n")
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BAREBOX_CMD_HELP_OPT ("-e <ofs>","entry point to the image relative to start (0)\n")
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#ifdef CONFIG_OFTREE
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BAREBOX_CMD_HELP_OPT ("-o <oftree>","specify oftree\n")
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#endif
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#ifdef CONFIG_CMD_BOOTM_VERBOSE
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BAREBOX_CMD_HELP_OPT ("-v","verbose\n")
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#endif
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(bootm)
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.cmd = do_bootm,
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.usage = "boot an application image",
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BAREBOX_CMD_HELP(cmd_bootm_help)
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BAREBOX_CMD_END
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BAREBOX_MAGICVAR(bootargs, "Linux Kernel parameters");
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BAREBOX_MAGICVAR_NAMED(global_bootm_image, global.bootm.image, "bootm default boot image");
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BAREBOX_MAGICVAR_NAMED(global_bootm_initrd, global.bootm.initrd, "bootm default initrd");
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static struct binfmt_hook binfmt_uimage_hook = {
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.type = filetype_uimage,
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.exec = "bootm",
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};
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static int binfmt_uimage_init(void)
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{
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return binfmt_register(&binfmt_uimage_hook);
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}
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fs_initcall(binfmt_uimage_init);
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/**
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* @file
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* @brief Boot support for Linux
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*/
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/**
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* @page boot_preparation Preparing for Boot
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*
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* This chapter describes what's to be done to forward the control from
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* barebox to Linux. This part describes the generic part, below you can find
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* the architecture specific part.
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*
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* - @subpage arm_boot_preparation
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* - @subpage ppc_boot_preparation
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* - @subpage x86_boot_preparation
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*/
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