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sh: Add support any page size and empty_zero_page to SH Linux uImage

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Old U-Boot supported 4KB page size only. If this version, Linux
kernel can not get command line from U-Boot.
SH Linux kernel can change page size and empty_zero_page.
This patch support this function and fix promlem.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Nobuhiro Iwamatsu 2008-09-17 11:08:36 +09:00
parent ce9f99ddb5
commit 6b44a43921
1 changed files with 18 additions and 26 deletions
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44
lib_sh/bootm.c
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@ -2,6 +2,9 @@
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
* (c) Copyright 2008 Renesas Solutions Corp.
*
* See file CREDITS for list of people who contributed to this
* project.
*
@ -25,47 +28,36 @@
#include <command.h>
#include <asm/byteorder.h>
/* The SH kernel reads arguments from the empty zero page at location
* 0 at the start of SDRAM. The following are copied from
* arch/sh/kernel/setup.c and may require tweaking if the kernel sources
* change.
*/
#define PARAM ((unsigned char *)CFG_SDRAM_BASE + 0x1000)
#define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000))
#define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004))
#define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008))
#define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c))
#define INITRD_START (*(unsigned long *) (PARAM+0x010))
#define INITRD_SIZE (*(unsigned long *) (PARAM+0x014))
/* ... */
#define COMMAND_LINE ((char *) (PARAM+0x100))
#define RAMDISK_IMAGE_START_MASK 0x07FF
#ifdef CFG_DEBUG
static void hexdump (unsigned char *buf, int len)
static void hexdump(unsigned char *buf, int len)
{
int i;
for (i = 0; i < len; i++) {
if ((i % 16) == 0)
printf ("%s%08x: ", i ? "\n" : "", (unsigned int) &buf[i]);
printf ("%02x ", buf[i]);
printf("%s%08x: ", i ? "\n" : "",
(unsigned int)&buf[i]);
printf("%02x ", buf[i]);
}
printf ("\n");
printf("\n");
}
#endif
int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
{
char *bootargs = getenv("bootargs");
/* Linux kernel load address */
void (*kernel) (void) = (void (*)(void))images->ep;
/* empty_zero_page */
unsigned char *param = (unsigned char *)image_get_ep(images);
/* Linux kernel command line */
unsigned char *cmdline = param + 0x100;
/* PAGE_SIZE */
unsigned long size = images->ep - image_get_ep(images);
char *bootargs = getenv("bootargs");
/* Setup parameters */
memset(PARAM, 0, 0x1000); /* Clear zero page */
strcpy(COMMAND_LINE, bootargs);
memset(param, 0, size); /* Clear zero page */
strcpy(cmdline, bootargs);
kernel();
/* does not return */