357 lines
8.6 KiB
C
357 lines
8.6 KiB
C
/*
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* (C) Copyright 2002
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* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
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* Marius Groeger <mgroeger@sysgo.de>
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*
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* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
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*
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* This program 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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* 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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* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <cmd_boot.h>
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#include <image.h>
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#include <zlib.h>
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#include <asm/byteorder.h>
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#include <asm/setup.h>
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#define tag_size(type) ((sizeof(struct tag_header) + sizeof(struct type)) >> 2)
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#define tag_next(t) ((struct tag *)((u32 *)(t) + (t)->hdr.size))
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#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
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defined (CONFIG_CMDLINE_TAG) || \
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defined (CONFIG_INITRD_TAG) || \
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defined (CONFIG_VFD)
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static void setup_start_tag(bd_t *bd);
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# ifdef CONFIG_SETUP_MEMORY_TAGS
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static void setup_memory_tags(bd_t *bd);
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# endif
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static void setup_commandline_tag(bd_t *bd, char *commandline);
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#if 0
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static void setup_ramdisk_tag(bd_t *bd);
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#endif
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# ifdef CONFIG_INITRD_TAG
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static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end);
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# endif
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static void setup_end_tag(bd_t *bd);
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# if defined (CONFIG_VFD)
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static void setup_videolfb_tag(gd_t *gd);
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# endif
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static struct tag *params;
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#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
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#ifdef CONFIG_SHOW_BOOT_PROGRESS
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# include <status_led.h>
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# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
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#else
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# define SHOW_BOOT_PROGRESS(arg)
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#endif
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extern image_header_t header; /* from cmd_bootm.c */
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void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
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ulong addr, ulong *len_ptr, int verify)
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{
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DECLARE_GLOBAL_DATA_PTR;
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ulong len = 0, checksum;
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ulong initrd_start, initrd_end;
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ulong data;
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void (*theKernel)(int zero, int arch);
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image_header_t *hdr = &header;
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bd_t *bd = gd->bd;
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#ifdef CONFIG_CMDLINE_TAG
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char *commandline = getenv("bootargs");
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#endif
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theKernel = (void (*)(int, int))ntohl(hdr->ih_ep);
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/*
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* Check if there is an initrd image
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*/
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if (argc >= 3) {
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SHOW_BOOT_PROGRESS (9);
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addr = simple_strtoul(argv[2], NULL, 16);
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printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
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/* Copy header so we can blank CRC field for re-calculation */
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memcpy (&header, (char *)addr, sizeof(image_header_t));
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if (ntohl(hdr->ih_magic) != IH_MAGIC) {
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printf ("Bad Magic Number\n");
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SHOW_BOOT_PROGRESS (-10);
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do_reset (cmdtp, flag, argc, argv);
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}
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data = (ulong)&header;
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len = sizeof(image_header_t);
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checksum = ntohl(hdr->ih_hcrc);
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hdr->ih_hcrc = 0;
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if (crc32 (0, (char *)data, len) != checksum) {
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printf ("Bad Header Checksum\n");
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SHOW_BOOT_PROGRESS (-11);
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do_reset (cmdtp, flag, argc, argv);
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}
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SHOW_BOOT_PROGRESS (10);
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print_image_hdr (hdr);
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data = addr + sizeof(image_header_t);
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len = ntohl(hdr->ih_size);
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if (verify) {
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ulong csum = 0;
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printf (" Verifying Checksum ... ");
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csum = crc32 (0, (char *)data, len);
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if (csum != ntohl(hdr->ih_dcrc)) {
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printf ("Bad Data CRC\n");
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SHOW_BOOT_PROGRESS (-12);
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do_reset (cmdtp, flag, argc, argv);
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}
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printf ("OK\n");
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}
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SHOW_BOOT_PROGRESS (11);
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if ((hdr->ih_os != IH_OS_LINUX) ||
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(hdr->ih_arch != IH_CPU_ARM) ||
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(hdr->ih_type != IH_TYPE_RAMDISK) ) {
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printf ("No Linux ARM Ramdisk Image\n");
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SHOW_BOOT_PROGRESS (-13);
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do_reset (cmdtp, flag, argc, argv);
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}
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/*
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* Now check if we have a multifile image
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*/
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} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
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ulong tail = ntohl(len_ptr[0]) % 4;
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int i;
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SHOW_BOOT_PROGRESS (13);
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/* skip kernel length and terminator */
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data = (ulong)(&len_ptr[2]);
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/* skip any additional image length fields */
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for (i=1; len_ptr[i]; ++i)
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data += 4;
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/* add kernel length, and align */
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data += ntohl(len_ptr[0]);
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if (tail) {
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data += 4 - tail;
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}
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len = ntohl(len_ptr[1]);
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} else {
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/*
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* no initrd image
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*/
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SHOW_BOOT_PROGRESS (14);
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data = 0;
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}
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#ifdef DEBUG
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if (!data) {
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printf ("No initrd\n");
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}
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#endif
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if (data) {
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initrd_start = data;
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initrd_end = initrd_start + len;
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} else {
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initrd_start = 0;
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initrd_end = 0;
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}
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SHOW_BOOT_PROGRESS (15);
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#ifdef DEBUG
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printf ("## Transferring control to Linux (at address %08lx) ...\n",
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(ulong)theKernel);
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#endif
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#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
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defined (CONFIG_CMDLINE_TAG) || \
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defined (CONFIG_INITRD_TAG) || \
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defined (CONFIG_VFD)
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setup_start_tag(bd);
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#ifdef CONFIG_SETUP_MEMORY_TAGS
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setup_memory_tags(bd);
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#endif
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#ifdef CONFIG_CMDLINE_TAG
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setup_commandline_tag(bd, commandline);
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#endif
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#ifdef CONFIG_INITRD_TAG
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setup_initrd_tag(bd, initrd_start, initrd_end);
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#endif
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#if 0
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setup_ramdisk_tag(bd);
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#endif
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#if defined (CONFIG_VFD)
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setup_videolfb_tag(gd);
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#endif
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setup_end_tag(bd);
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#endif
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/* we assume that the kernel is in place */
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printf("\nStarting kernel ...\n\n");
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cleanup_before_linux();
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theKernel(0, bd->bi_arch_number);
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}
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#if defined (CONFIG_SETUP_MEMORY_TAGS) || \
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defined (CONFIG_CMDLINE_TAG) || \
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defined (CONFIG_INITRD_TAG) || \
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defined (CONFIG_VFD)
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static void setup_start_tag(bd_t *bd)
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{
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params = (struct tag *)bd->bi_boot_params;
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params->hdr.tag = ATAG_CORE;
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params->hdr.size = tag_size(tag_core);
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params->u.core.flags = 0;
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params->u.core.pagesize = 0;
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params->u.core.rootdev = 0;
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params = tag_next(params);
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}
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#ifdef CONFIG_SETUP_MEMORY_TAGS
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static void setup_memory_tags(bd_t *bd)
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{
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int i;
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for(i = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
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params->hdr.tag = ATAG_MEM;
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params->hdr.size = tag_size(tag_mem32);
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params->u.mem.start = bd->bi_dram[i].start;
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params->u.mem.size = bd->bi_dram[i].size;
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params = tag_next(params);
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}
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}
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#endif /* CONFIG_SETUP_MEMORY_TAGS */
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static void setup_commandline_tag(bd_t *bd, char *commandline)
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{
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char *p;
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/* eat leading white space */
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for(p = commandline; *p == ' '; p++)
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;
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/* skip non-existent command lines so the kernel will still
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* use its default command line.
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*/
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if(*p == '\0')
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return;
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params->hdr.tag = ATAG_CMDLINE;
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params->hdr.size = (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2;
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strcpy(params->u.cmdline.cmdline, p);
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params = tag_next(params);
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}
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#ifndef ATAG_INITRD2
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#define ATAG_INITRD2 0x54420005
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#endif
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#ifdef CONFIG_INITRD_TAG
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static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end)
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{
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/* an ATAG_INITRD node tells the kernel where the compressed
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* ramdisk can be found. ATAG_RDIMG is a better name, actually.
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*/
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params->hdr.tag = ATAG_INITRD2;
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params->hdr.size = tag_size(tag_initrd);
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params->u.initrd.start = initrd_start;
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params->u.initrd.size = initrd_end - initrd_start;
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params = tag_next(params);
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}
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#endif /* CONFIG_INITRD_TAG */
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#if 0
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static void setup_ramdisk_tag(bd_t *bd)
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{
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/* an ATAG_RAMDISK node tells the kernel how large the
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* decompressed ramdisk will become.
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*/
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params->hdr.tag = ATAG_RAMDISK;
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params->hdr.size = tag_size(tag_ramdisk);
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params->u.ramdisk.start = 0;
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/*params->u.ramdisk.size = RAMDISK_SIZE; */
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params->u.ramdisk.flags = 1; /* automatically load ramdisk */
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params = tag_next(params);
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}
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#endif /* 0 */
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#if defined (CONFIG_VFD)
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static void setup_videolfb_tag(gd_t *gd)
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{
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/* An ATAG_VIDEOLFB node tells the kernel where and how large
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* the framebuffer for video was allocated (among other things).
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* Note that a _physical_ address is passed !
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*
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* We only use it to pass the address and size, the other entries
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* in the tag_videolfb are not of interest.
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*/
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params->hdr.tag = ATAG_VIDEOLFB;
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params->hdr.size = tag_size(tag_videolfb);
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params->u.videolfb.lfb_base = (u32)gd->fb_base;
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/* 7168 = 256*4*56/8 - actually 2 pages (8192 bytes) are allocated */
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params->u.videolfb.lfb_size = 7168;
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params = tag_next(params);
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}
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#endif
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static void setup_end_tag(bd_t *bd)
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{
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params->hdr.tag = ATAG_NONE;
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params->hdr.size = 0;
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}
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#endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */
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