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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 <bzlib.h>
#include <watchdog.h>
#include <environment.h>
#include <asm/byteorder.h>
DECLARE_GLOBAL_DATA_PTR;
#define PHYSADDR(x) x
#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
int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
int argc, char *argv[],
image_header_t *hdr, int verify)
{
ulong sp;
ulong rd_data, rd_len;
ulong initrd_high;
ulong initrd_start, initrd_end;
image_header_t *rd_hdr;
int initrd_copy_to_ram = 1;
ulong cmd_start, cmd_end;
char *cmdline;
char *s;
bd_t *kbd;
void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
if ((s = getenv("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
* turning the "load high" feature off. This is intentional.
*/
initrd_high = simple_strtoul(s, NULL, 16);
if (initrd_high == ~0)
initrd_copy_to_ram = 0;
} else { /* not set, no restrictions to load high */
initrd_high = ~0;
}
#ifdef CONFIG_LOGBUFFER
kbd = gd->bd;
/* Prevent initrd from overwriting logbuffer */
if (initrd_high < (kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD))
initrd_high = kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD;
debug("## Logbuffer at 0x%08lX ", kbd->bi_memsize - LOGBUFF_LEN);
#endif
/*
* Booting a (Linux) kernel image
*
* Allocate space for command line and board info - the
* address should be as high as possible within the reach of
* the kernel (see CFG_BOOTMAPSZ settings), but in unused
* memory, which means far enough below the current stack
* pointer.
*/
asm("movel %%a7, %%d0\n"
"movel %%d0, %0\n": "=d"(sp): :"%d0");
debug("## Current stack ends at 0x%08lX ", sp);
sp -= 2048; /* just to be sure */
if (sp > CFG_BOOTMAPSZ)
sp = CFG_BOOTMAPSZ;
sp &= ~0xF;
debug("=> set upper limit to 0x%08lX\n", sp);
cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF);
kbd = (bd_t *) (((ulong) cmdline - sizeof(bd_t)) & ~0xF);
if ((s = getenv("bootargs")) == NULL)
s = "";
strcpy(cmdline, s);
cmd_start = (ulong) & cmdline[0];
cmd_end = cmd_start + strlen(cmdline);
*kbd = *(gd->bd);
#ifdef DEBUG
printf("## cmdline at 0x%08lX ... 0x%08lX\n", cmd_start, cmd_end);
do_bdinfo(NULL, 0, 0, NULL);
#endif
if ((s = getenv("clocks_in_mhz")) != NULL) {
/* convert all clock information to MHz */
kbd->bi_intfreq /= 1000000L;
kbd->bi_busfreq /= 1000000L;
}
kernel =
(void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);
/*
* Check if there is an initrd image
*/
if (argc >= 3) {
debug("Not skipping initrd\n");
SHOW_BOOT_PROGRESS(9);
rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16);
printf ("## Loading RAMDisk Image at %08lx ...\n", rd_hdr);
if (!image_check_magic (rd_hdr)) {
puts("Bad Magic Number\n");
SHOW_BOOT_PROGRESS(-10);
do_reset(cmdtp, flag, argc, argv);
}
if (!image_check_hcrc (rd_hdr)) {
puts("Bad Header Checksum\n");
SHOW_BOOT_PROGRESS(-11);
do_reset(cmdtp, flag, argc, argv);
}
SHOW_BOOT_PROGRESS(10);
print_image_hdr (rd_hdr);
rd_data = image_get_data (rd_hdr);
rd_len = image_get_data_size (rd_hdr);
if (verify) {
puts(" Verifying Checksum ... ");
if (!image_check_dcrc_wd (rd_hdr, CHUNKSZ)) {
puts("Bad Data CRC\n");
SHOW_BOOT_PROGRESS(-12);
do_reset(cmdtp, flag, argc, argv);
}
puts("OK\n");
}
SHOW_BOOT_PROGRESS(11);
if (!image_check_os (rd_hdr, IH_OS_LINUX) ||
!image_check_arch (rd_hdr, IH_ARCH_M68K) ||
!image_check_type (rd_hdr, IH_TYPE_RAMDISK)) {
puts("No Linux ColdFire Ramdisk Image\n");
SHOW_BOOT_PROGRESS(-13);
do_reset(cmdtp, flag, argc, argv);
}
/*
* Now check if we have a multifile image
*/
} else if (image_check_type (hdr, IH_TYPE_MULTI)) {
/*
* Get second entry data start address and len
*/
SHOW_BOOT_PROGRESS (13);
image_multi_getimg (hdr, 1, &rd_data, &rd_len);
} else {
/*
* no initrd image
*/
SHOW_BOOT_PROGRESS(14);
rd_len = rd_data = 0;
}
if (!rd_data) {
debug("No initrd\n");
}
if (rd_data) {
if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
initrd_start = rd_data;
initrd_end = initrd_start + rd_len;
} else {
initrd_start = (ulong) kbd - rd_len;
initrd_start &= ~(4096 - 1); /* align on page */
if (initrd_high) {
ulong nsp;
/*
* the inital ramdisk does not need to be within
* CFG_BOOTMAPSZ as it is not accessed until after
* the mm system is initialised.
*
* do the stack bottom calculation again and see if
* the initrd will fit just below the monitor stack
* bottom without overwriting the area allocated
* above for command line args and board info.
*/
asm("movel %%a7, %%d0\n"
"movel %%d0, %0\n": "=d"(nsp): :"%d0");
nsp -= 2048; /* just to be sure */
nsp &= ~0xF;
if (nsp > initrd_high) /* limit as specified */
nsp = initrd_high;
nsp -= rd_len;
nsp &= ~(4096 - 1); /* align on page */
if (nsp >= sp)
initrd_start = nsp;
}
SHOW_BOOT_PROGRESS(12);
debug
("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
rd_data, rd_data + rd_len - 1, rd_len, rd_len);
initrd_end = initrd_start + rd_len;
printf(" Loading Ramdisk to %08lx, end %08lx ... ",
initrd_start, initrd_end);
memmove_wd((void *)initrd_start,
(void *)rd_data, rd_len, CHUNKSZ);
puts("OK\n");
}
} else {
initrd_start = 0;
initrd_end = 0;
}
debug("## Transferring control to Linux (at address %08lx) ...\n",
(ulong) kernel);
SHOW_BOOT_PROGRESS(15);
/*
* Linux Kernel Parameters (passing board info data):
* r3: ptr to board info data
* r4: initrd_start or 0 if no initrd
* r5: initrd_end - unused if r4 is 0
* r6: Start of command line string
* r7: End of command line string
*/
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
}
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