bootm.c
3.78 KB
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/*
* (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.
*
* 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 <asm/byteorder.h>
#ifdef CONFIG_SYS_DEBUG
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("\n");
}
#endif
#define MOUNT_ROOT_RDONLY 0x000
#define RAMDISK_FLAGS 0x004
#define ORIG_ROOT_DEV 0x008
#define LOADER_TYPE 0x00c
#define INITRD_START 0x010
#define INITRD_SIZE 0x014
#define COMMAND_LINE 0x100
#define RD_PROMPT (1<<15)
#define RD_DOLOAD (1<<14)
#define CMD_ARG_RD_PROMPT "prompt_ramdisk="
#define CMD_ARG_RD_DOLOAD "load_ramdisk="
#ifdef CONFIG_SH_SDRAM_OFFSET
#define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
#else
#define GET_INITRD_START(initrd, linux) (initrd - linux)
#endif
static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
{
*(unsigned long *)(param_addr) = data;
}
static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
{
unsigned long val = 0;
char *p = strstr(cmdline, key);
if (p) {
p += strlen(key);
val = simple_strtol(p, NULL, base);
}
return val;
}
int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
{
/* Linux kernel load address */
void (*kernel) (void) = (void (*)(void))images->ep;
/* empty_zero_page */
unsigned char *param
= (unsigned char *)image_get_load(images->legacy_hdr_os);
/* Linux kernel command line */
char *cmdline = (char *)param + COMMAND_LINE;
/* PAGE_SIZE */
unsigned long size = images->ep - (unsigned long)param;
char *bootargs = getenv("bootargs");
if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
return 1;
/* Setup parameters */
memset(param, 0, size); /* Clear zero page */
/* Set commandline */
strcpy(cmdline, bootargs);
sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
/* Initrd */
if (images->rd_start || images->rd_end) {
unsigned long ramdisk_flags = 0;
int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
if (val == 1)
ramdisk_flags |= RD_PROMPT;
else
ramdisk_flags &= ~RD_PROMPT;
val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
if (val == 1)
ramdisk_flags |= RD_DOLOAD;
else
ramdisk_flags &= ~RD_DOLOAD;
set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
set_sh_linux_param((unsigned long)param + INITRD_START,
GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE));
set_sh_linux_param((unsigned long)param + INITRD_SIZE,
images->rd_end - images->rd_start);
}
/* Boot kernel */
kernel();
/* does not return */
return 1;
}