mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-18 18:59:44 +00:00
139 lines
3.5 KiB
C
139 lines
3.5 KiB
C
/*
|
|
* (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>
|
|
#ifdef CONFIG_SHOW_BOOT_PROGRESS
|
|
# include <status_led.h>
|
|
#endif
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
#define PHYSADDR(x) x
|
|
|
|
#define LINUX_MAX_ENVS 256
|
|
#define LINUX_MAX_ARGS 256
|
|
|
|
static ulong get_sp (void);
|
|
static void set_clocks_in_mhz (bd_t *kbd);
|
|
|
|
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
|
|
{
|
|
ulong sp;
|
|
|
|
ulong rd_len;
|
|
ulong initrd_start, initrd_end;
|
|
int ret;
|
|
|
|
ulong cmd_start, cmd_end;
|
|
ulong bootmap_base;
|
|
bd_t *kbd;
|
|
void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
|
|
struct lmb *lmb = &images->lmb;
|
|
|
|
bootmap_base = getenv_bootm_low();
|
|
|
|
/*
|
|
* 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 CONFIG_SYS_BOOTMAPSZ settings), but in unused
|
|
* memory, which means far enough below the current stack
|
|
* pointer.
|
|
*/
|
|
sp = get_sp();
|
|
debug ("## Current stack ends at 0x%08lx ", sp);
|
|
|
|
/* adjust sp by 1K to be safe */
|
|
sp -= 1024;
|
|
lmb_reserve(lmb, sp, (CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp));
|
|
|
|
/* allocate space and init command line */
|
|
ret = boot_get_cmdline (lmb, &cmd_start, &cmd_end, bootmap_base);
|
|
if (ret) {
|
|
puts("ERROR with allocation of cmdline\n");
|
|
goto error;
|
|
}
|
|
|
|
/* allocate space for kernel copy of board info */
|
|
ret = boot_get_kbd (lmb, &kbd, bootmap_base);
|
|
if (ret) {
|
|
puts("ERROR with allocation of kernel bd\n");
|
|
goto error;
|
|
}
|
|
set_clocks_in_mhz(kbd);
|
|
|
|
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep;
|
|
|
|
rd_len = images->rd_end - images->rd_start;
|
|
ret = boot_ramdisk_high (lmb, images->rd_start, rd_len,
|
|
&initrd_start, &initrd_end);
|
|
if (ret)
|
|
goto error;
|
|
|
|
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 */
|
|
error:
|
|
return 1;
|
|
}
|
|
|
|
static ulong get_sp (void)
|
|
{
|
|
ulong sp;
|
|
|
|
asm("movel %%a7, %%d0\n"
|
|
"movel %%d0, %0\n": "=d"(sp): :"%d0");
|
|
|
|
return sp;
|
|
}
|
|
|
|
static void set_clocks_in_mhz (bd_t *kbd)
|
|
{
|
|
char *s;
|
|
|
|
if ((s = getenv("clocks_in_mhz")) != NULL) {
|
|
/* convert all clock information to MHz */
|
|
kbd->bi_intfreq /= 1000000L;
|
|
kbd->bi_busfreq /= 1000000L;
|
|
}
|
|
}
|