mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-12 16:07:30 +00:00
134 lines
3.8 KiB
C
134 lines
3.8 KiB
C
/*
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* (C) Copyright 2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
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* (c) Copyright 2008 Renesas Solutions Corp.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/byteorder.h>
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#ifdef CONFIG_SYS_DEBUG
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static void hexdump(unsigned char *buf, int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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if ((i % 16) == 0)
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printf("%s%08x: ", i ? "\n" : "",
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(unsigned int)&buf[i]);
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printf("%02x ", buf[i]);
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}
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printf("\n");
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}
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#endif
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#define MOUNT_ROOT_RDONLY 0x000
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#define RAMDISK_FLAGS 0x004
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#define ORIG_ROOT_DEV 0x008
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#define LOADER_TYPE 0x00c
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#define INITRD_START 0x010
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#define INITRD_SIZE 0x014
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#define COMMAND_LINE 0x100
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#define RD_PROMPT (1<<15)
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#define RD_DOLOAD (1<<14)
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#define CMD_ARG_RD_PROMPT "prompt_ramdisk="
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#define CMD_ARG_RD_DOLOAD "load_ramdisk="
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#ifdef CONFIG_SH_SDRAM_OFFSET
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#define GET_INITRD_START(initrd, linux) (initrd - linux + CONFIG_SH_SDRAM_OFFSET)
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#else
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#define GET_INITRD_START(initrd, linux) (initrd - linux)
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#endif
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static void set_sh_linux_param(unsigned long param_addr, unsigned long data)
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{
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*(unsigned long *)(param_addr) = data;
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}
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static unsigned long sh_check_cmd_arg(char *cmdline, char *key, int base)
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{
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unsigned long val = 0;
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char *p = strstr(cmdline, key);
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if (p) {
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p += strlen(key);
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val = simple_strtol(p, NULL, base);
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}
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return val;
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}
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int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
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{
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/* Linux kernel load address */
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void (*kernel) (void) = (void (*)(void))images->ep;
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/* empty_zero_page */
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unsigned char *param
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= (unsigned char *)image_get_load(images->legacy_hdr_os);
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/* Linux kernel command line */
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char *cmdline = (char *)param + COMMAND_LINE;
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/* PAGE_SIZE */
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unsigned long size = images->ep - (unsigned long)param;
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char *bootargs = getenv("bootargs");
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if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
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return 1;
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/* Setup parameters */
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memset(param, 0, size); /* Clear zero page */
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/* Set commandline */
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strcpy(cmdline, bootargs);
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sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
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/* Initrd */
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if (images->rd_start || images->rd_end) {
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unsigned long ramdisk_flags = 0;
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int val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_PROMPT, 10);
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if (val == 1)
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ramdisk_flags |= RD_PROMPT;
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else
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ramdisk_flags &= ~RD_PROMPT;
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val = sh_check_cmd_arg(bootargs, CMD_ARG_RD_DOLOAD, 10);
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if (val == 1)
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ramdisk_flags |= RD_DOLOAD;
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else
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ramdisk_flags &= ~RD_DOLOAD;
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set_sh_linux_param((unsigned long)param + MOUNT_ROOT_RDONLY, 0x0001);
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set_sh_linux_param((unsigned long)param + RAMDISK_FLAGS, ramdisk_flags);
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set_sh_linux_param((unsigned long)param + ORIG_ROOT_DEV, 0x0200);
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set_sh_linux_param((unsigned long)param + LOADER_TYPE, 0x0001);
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set_sh_linux_param((unsigned long)param + INITRD_START,
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GET_INITRD_START(images->rd_start, CONFIG_SYS_SDRAM_BASE));
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set_sh_linux_param((unsigned long)param + INITRD_SIZE,
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images->rd_end - images->rd_start);
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}
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/* Boot kernel */
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kernel();
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/* does not return */
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return 1;
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}
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