u-boot/arch/m68k/lib/bootm.c
Simon Glass e7dcf5645f env: Drop environment.h header file where not needed
This header file is now only used by files that access internal
environment features. Drop it from various places where it is not needed.

Acked-by: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
2019-08-11 16:43:41 -04:00

121 lines
2.7 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*/
#include <common.h>
#include <command.h>
#include <env.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <bzlib.h>
#include <watchdog.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;
}
}