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/*
* (C) Copyright 2002
* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
* Marius Groeger <mgroeger@sysgo.de>
*
* Copyright (C) 2001 Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <common.h>
#include <command.h>
#include <image.h>
#include <zlib.h>
#include <asm/byteorder.h>
#include <asm/zimage.h>
/*cmd_boot.c*/
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
extern image_header_t header; /* from cmd_bootm.c */
image_header_t *fake_header(image_header_t *hdr, void *ptr, int size)
{
/* try each supported image type in order */
if (NULL != fake_zimage_header(hdr, ptr, size)) {
return hdr;
}
return NULL;
}
void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
ulong addr, ulong *len_ptr, int verify)
{
void *base_ptr;
ulong len = 0, checksum;
ulong initrd_start, initrd_end;
ulong data;
image_header_t *hdr = &header;
/*
* Check if there is an initrd image
*/
if (argc >= 3) {
addr = simple_strtoul(argv[2], NULL, 16);
printf ("## Loading Ramdisk Image at %08lx ...\n", addr);
/* Copy header so we can blank CRC field for re-calculation */
memcpy (&header, (char *)addr, sizeof(image_header_t));
if (ntohl(hdr->ih_magic) != IH_MAGIC) {
printf ("Bad Magic Number\n");
do_reset (cmdtp, flag, argc, argv);
}
data = (ulong)&header;
len = sizeof(image_header_t);
checksum = ntohl(hdr->ih_hcrc);
hdr->ih_hcrc = 0;
if (crc32 (0, (char *)data, len) != checksum) {
printf ("Bad Header Checksum\n");
do_reset (cmdtp, flag, argc, argv);
}
print_image_hdr (hdr);
data = addr + sizeof(image_header_t);
len = ntohl(hdr->ih_size);
if (verify) {
ulong csum = 0;
printf (" Verifying Checksum ... ");
csum = crc32 (0, (char *)data, len);
if (csum != ntohl(hdr->ih_dcrc)) {
printf ("Bad Data CRC\n");
do_reset (cmdtp, flag, argc, argv);
}
printf ("OK\n");
}
if ((hdr->ih_os != IH_OS_LINUX) ||
(hdr->ih_arch != IH_CPU_I386) ||
(hdr->ih_type != IH_TYPE_RAMDISK) ) {
printf ("No Linux i386 Ramdisk Image\n");
do_reset (cmdtp, flag, argc, argv);
}
/*
* Now check if we have a multifile image
*/
} else if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
ulong tail = ntohl(len_ptr[0]) % 4;
int i;
/* skip kernel length and terminator */
data = (ulong)(&len_ptr[2]);
/* skip any additional image length fields */
for (i=1; len_ptr[i]; ++i)
data += 4;
/* add kernel length, and align */
data += ntohl(len_ptr[0]);
if (tail) {
data += 4 - tail;
}
len = ntohl(len_ptr[1]);
} else {
/*
* no initrd image
*/
data = 0;
}
#ifdef DEBUG
if (!data) {
printf ("No initrd\n");
}
#endif
if (data) {
initrd_start = data;
initrd_end = initrd_start + len;
printf (" Loading Ramdisk to %08lx, end %08lx ... ",
initrd_start, initrd_end);
memmove ((void *)initrd_start, (void *)data, len);
printf ("OK\n");
} else {
initrd_start = 0;
initrd_end = 0;
}
/* if multi-part image, we need to advance base ptr */
if ((hdr->ih_type==IH_TYPE_MULTI) && (len_ptr[1])) {
int i;
for (i=0, addr+=sizeof(int); len_ptr[i++]; addr+=sizeof(int));
}
base_ptr = load_zimage((void*)addr + sizeof(image_header_t), ntohl(hdr->ih_size),
initrd_start, initrd_end-initrd_start, 0);
if (NULL == base_ptr) {
printf ("## Kernel loading failed ...\n");
do_reset(cmdtp, flag, argc, argv);
}
#ifdef DEBUG
printf ("## Transferring control to Linux (at address %08x) ...\n",
(u32)base_ptr);
#endif
/* we assume that the kernel is in place */
printf("\nStarting kernel ...\n\n");
boot_zimage(base_ptr);
}
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