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/*
* (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;
if ((s = getenv("clocks_in_mhz")) != NULL) {
/* convert all clock information to MHz */
kbd->bi_intfreq /= 1000000L;
kbd->bi_busfreq /= 1000000L;
}
}
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