lib_i386/bootm.c

   1 /*
   2  * (C) Copyright 2002
   3  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
   4  * Marius Groeger <mgroeger@sysgo.de>
   5  *
   6  * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <image.h>
  27 #include <zlib.h>
  28 #include <asm/byteorder.h>
  29 #include <asm/zimage.h>
  30
  31 /*cmd_boot.c*/
  32 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  33
  34 void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  35                 image_header_t *hdr, int verify)
  36 {
  37         void *base_ptr;
  38
  39         ulong os_data, os_len;
  40         ulong initrd_start, initrd_end;
  41
  42         get_ramdisk (cmdtp, flag, argc, argv, hdr, verify,
  43                         IH_ARCH_I386, &initrd_start, &initrd_end);
  44
  45         /* if multi-part image, we need to advance base ptr */
  46         if (image_check_type (hdr, IH_TYPE_MULTI)) {
  47                 image_multi_getimg (hdr, 0, &os_data, &os_len);
  48         } else {
  49                 os_data = image_get_data (hdr);
  50                 os_len = image_get_data_size (hdr);
  51         }
  52
  53         base_ptr = load_zimage ((void*)os_data, os_len,
  54                         initrd_start, initrd_end - initrd_start, 0);
  55
  56         if (NULL == base_ptr) {
  57                 printf ("## Kernel loading failed ...\n");
  58                 do_reset(cmdtp, flag, argc, argv);
  59
  60         }
  61
  62 #ifdef DEBUG
  63         printf ("## Transferring control to Linux (at address %08x) ...\n",
  64                 (u32)base_ptr);
  65 #endif
  66
  67         /* we assume that the kernel is in place */
  68         printf("\nStarting kernel ...\n\n");
  69
  70         boot_zimage(base_ptr);
  71
  72 }