mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-27 05:23:34 +00:00
00caae6d47
We are now using an env_ prefix for environment functions. Rename these two functions for consistency. Also add function comments in common.h. Quite a few places use getenv() in a condition context, provoking a warning from checkpatch. These are fixed up in this patch also. Suggested-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Simon Glass <sjg@chromium.org>
122 lines
2.7 KiB
C
122 lines
2.7 KiB
C
/*
|
|
* (C) Copyright 2003
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <image.h>
|
|
#include <u-boot/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);
|
|
|
|
void arch_lmb_reserve(struct lmb *lmb)
|
|
{
|
|
ulong sp;
|
|
|
|
/*
|
|
* 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));
|
|
}
|
|
|
|
int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
|
|
{
|
|
int ret;
|
|
bd_t *kbd;
|
|
void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
|
|
struct lmb *lmb = &images->lmb;
|
|
|
|
/*
|
|
* allow the PREP bootm subcommand, it is required for bootm to work
|
|
*/
|
|
if (flag & BOOTM_STATE_OS_PREP)
|
|
return 0;
|
|
|
|
if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
|
|
return 1;
|
|
|
|
/* allocate space for kernel copy of board info */
|
|
ret = boot_get_kbd (lmb, &kbd);
|
|
if (ret) {
|
|
puts("ERROR with allocation of kernel bd\n");
|
|
goto error;
|
|
}
|
|
set_clocks_in_mhz(kbd);
|
|
|
|
ret = image_setup_linux(images);
|
|
if (ret)
|
|
goto error;
|
|
|
|
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))images->ep;
|
|
|
|
debug("## Transferring control to Linux (at address %08lx) ...\n",
|
|
(ulong) kernel);
|
|
|
|
bootstage_mark(BOOTSTAGE_ID_RUN_OS);
|
|
|
|
/*
|
|
* Linux Kernel Parameters (passing board info data):
|
|
* sp+00: Ignore, side effect of using jsr to jump to kernel
|
|
* sp+04: ptr to board info data
|
|
* sp+08: initrd_start or 0 if no initrd
|
|
* sp+12: initrd_end - unused if initrd_start is 0
|
|
* sp+16: Start of command line string
|
|
* sp+20: End of command line string
|
|
*/
|
|
(*kernel)(kbd, images->initrd_start, images->initrd_end,
|
|
images->cmdline_start, images->cmdline_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;
|
|
|
|
s = env_get("clocks_in_mhz");
|
|
if (s) {
|
|
/* convert all clock information to MHz */
|
|
kbd->bi_intfreq /= 1000000L;
|
|
kbd->bi_busfreq /= 1000000L;
|
|
}
|
|
}
|