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/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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/addrspace.h>
#define LINUX_MAX_ENVS 256
#define LINUX_MAX_ARGS 256
#ifdef CONFIG_SHOW_BOOT_PROGRESS
# include <status_led.h>
# define SHOW_BOOT_PROGRESS(arg) show_boot_progress(arg)
#else
# define SHOW_BOOT_PROGRESS(arg)
#endif
extern image_header_t header; /* from cmd_bootm.c */
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
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static int linux_argc;
static char ** linux_argv;
static char ** linux_env;
static char * linux_env_p;
static int linux_env_idx;
static void linux_params_init (ulong start, char * commandline);
static void linux_env_set (char * env_name, char * env_val);
void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
ulong addr, ulong *len_ptr, int verify)
{
DECLARE_GLOBAL_DATA_PTR;
ulong len = 0, checksum;
ulong initrd_start, initrd_end;
ulong data;
void (*theKernel)(int, char **, char **, int *);
image_header_t *hdr = &header;
char *commandline = getenv("bootargs");
char env_buf[12];
theKernel = (void (*)(int, char **, char **, int *))ntohl(hdr->ih_ep);
/*
* Check if there is an initrd image
*/
if (argc >= 3) {
SHOW_BOOT_PROGRESS (9);
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");
SHOW_BOOT_PROGRESS (-10);
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");
SHOW_BOOT_PROGRESS (-11);
do_reset (cmdtp, flag, argc, argv);
}
SHOW_BOOT_PROGRESS (10);
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");
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do_reset (cmdtp, flag, argc, argv);
}
printf ("OK\n");
}
SHOW_BOOT_PROGRESS (11);
if ((hdr->ih_os != IH_OS_LINUX) ||
(hdr->ih_arch != IH_CPU_MIPS) ||
(hdr->ih_type != IH_TYPE_RAMDISK) ) {
printf ("No Linux MIPS Ramdisk Image\n");
SHOW_BOOT_PROGRESS (-13);
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;
SHOW_BOOT_PROGRESS (13);
/* 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
*/
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data = 0;
}
#ifdef DEBUG
if (!data) {
printf ("No initrd\n");
}
#endif
if (data) {
initrd_start = data;
initrd_end = initrd_start + len;
} else {
initrd_start = 0;
initrd_end = 0;
}
SHOW_BOOT_PROGRESS (15);
#ifdef DEBUG
printf ("## Transferring control to Linux (at address %08lx) ...\n",
(ulong)theKernel);
#endif
linux_params_init (PHYSADDR(gd->bd->bi_boot_params), commandline);
sprintf (env_buf, "%lu", gd->ram_size >> 20);
linux_env_set ("memsize", env_buf);
sprintf (env_buf, "0x%08X", (uint)PHYSADDR(initrd_start));
linux_env_set ("initrd_start", env_buf);
sprintf (env_buf, "0x%X", (uint)(initrd_end - initrd_start));
linux_env_set ("initrd_size", env_buf);
sprintf (env_buf, "0x%08X", (uint)(gd->bd->bi_flashstart));
linux_env_set ("flash_start", env_buf);
sprintf (env_buf, "0x%X", (uint)(gd->bd->bi_flashsize));
linux_env_set ("flash_size", env_buf);
/* we assume that the kernel is in place */
printf("\nStarting kernel ...\n\n");
theKernel(linux_argc, linux_argv, linux_env, 0);
}
static void linux_params_init (ulong start, char * line)
{
char * next, * quote, * argp;
linux_argc = 1;
linux_argv = (char **) start;
linux_argv[0] = 0;
argp = (char *)(linux_argv + LINUX_MAX_ARGS);
next = line;
while (line && *line && linux_argc < LINUX_MAX_ARGS)
{
quote = strchr (line, '"');
next = strchr (line, ' ');
{
/* we found a left quote before the next blank
* now we have to find the matching right quote
*/
next = strchr (quote + 1, '"');
if (next != NULL)
quote = strchr (next + 1, '"');
next = strchr (next + 1, ' ');
}
}
if (next == NULL)
{
next = line + strlen (line);
}
linux_argv [linux_argc] = argp;
memcpy (argp, line, next - line);
argp [next - line] = 0;
argp += next - line + 1;
linux_argc ++;
line = next;
}
linux_env = (char **)(((ulong)argp + 15) & ~15);
linux_env [0] = 0;
linux_env_p = (char *)(linux_env + LINUX_MAX_ENVS);
linux_env_idx = 0;
}
static void linux_env_set (char * env_name, char * env_val)
{
if (linux_env_idx < LINUX_MAX_ENVS - 1)
{
linux_env [linux_env_idx] = linux_env_p;
strcpy (linux_env_p, env_name);
linux_env_p += strlen (env_name);
strcpy (linux_env_p, "=");
linux_env_p += 1;
strcpy (linux_env_p, env_val);
linux_env_p += strlen (env_val);
linux_env_p ++;
linux_env [++ linux_env_idx] = 0;
}
}