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                 bootm_headers_t *images)
  36 {
  37         void            *base_ptr;
  38         ulong           os_data, os_len;
  39         ulong           initrd_start, initrd_end;
  40         ulong           ep;
  41         image_header_t  *hdr;
  42         int             ret;
  43 #if defined(CONFIG_FIT)
  44         const void      *data;
  45         size_t          len;
  46 #endif
  47
  48         ret = boot_get_ramdisk (argc, argv, images, IH_ARCH_I386,
  49                         &initrd_start, &initrd_end);
  50         if (ret)
  51                 goto error;
  52
  53         if (images->legacy_hdr_valid) {
  54                 hdr = images->legacy_hdr_os;
  55                 if (image_check_type (hdr, IH_TYPE_MULTI)) {
  56                         /* if multi-part image, we need to get first subimage */
  57                         image_multi_getimg (hdr, 0, &os_data, &os_len);
  58                 } else {
  59                         /* otherwise get image data */
  60                         os_data = image_get_data (hdr);
  61                         os_len = image_get_data_size (hdr);
  62                 }
  63 #if defined(CONFIG_FIT)
  64         } else if (images->fit_uname_os) {
  65                 ret = fit_image_get_data (images->fit_hdr_os,
  66                                         images->fit_noffset_os, &data, &len);
  67                 if (ret) {
  68                         puts ("Can't get image data/size!\n");
  69                         goto error;
  70                 }
  71                 os_data = (ulong)data;
  72                 os_len = (ulong)len;
  73 #endif
  74         } else {
  75                 puts ("Could not find kernel image!\n");
  76                 goto error;
  77         }
  78
  79         base_ptr = load_zimage ((void*)os_data, os_len,
  80                         initrd_start, initrd_end - initrd_start, 0);
  81
  82         if (NULL == base_ptr) {
  83                 printf ("## Kernel loading failed ...\n");
  84                 goto error;
  85
  86         }
  87
  88         if (!images->autostart)
  89                 return ;
  90
  91 #ifdef DEBUG
  92         printf ("## Transferring control to Linux (at address %08x) ...\n",
  93                 (u32)base_ptr);
  94 #endif
  95
  96         /* we assume that the kernel is in place */
  97         printf("\nStarting kernel ...\n\n");
  98
  99         boot_zimage(base_ptr);
 100         /* does not return */
 101         return;
 102
 103 error:
 104         if (images->autostart)
 105                 do_reset (cmdtp, flag, argc, argv);
 106         return;
 107 }