lib_sh/bootm.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * (c) Copyright 2008 Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
   6  * (c) Copyright 2008 Renesas Solutions Corp.
   7  *
   8  * See file CREDITS for list of people who contributed to this
   9  * project.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  *
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <asm/byteorder.h>
  30
  31 #ifdef CONFIG_SYS_DEBUG
  32 static void hexdump(unsigned char *buf, int len)
  33 {
  34         int i;
  35
  36         for (i = 0; i < len; i++) {
  37                 if ((i % 16) == 0)
  38                         printf("%s%08x: ", i ? "\n" : "",
  39                                                         (unsigned int)&buf[i]);
  40                 printf("%02x ", buf[i]);
  41         }
  42         printf("\n");
  43 }
  44 #endif
  45
  46 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images)
  47 {
  48         /* Linux kernel load address */
  49         void (*kernel) (void) = (void (*)(void))images->ep;
  50         /* empty_zero_page */
  51         unsigned char *param
  52                 = (unsigned char *)image_get_load(images->legacy_hdr_os);
  53         /* Linux kernel command line */
  54         char *cmdline = (char *)param + 0x100;
  55         /* PAGE_SIZE */
  56         unsigned long size = images->ep - (unsigned long)param;
  57         char *bootargs = getenv("bootargs");
  58
  59         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  60                 return 1;
  61
  62         /* Setup parameters */
  63         memset(param, 0, size); /* Clear zero page */
  64         strcpy(cmdline, bootargs);
  65
  66         kernel();
  67         /* does not return */
  68
  69         return 1;
  70 }