arch/x86/lib/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  * 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
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation; either version 2 of
  14  * the License, or (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,
  24  * MA 02111-1307 USA
  25  */
  26
  27 #include <common.h>
  28 #include <command.h>
  29 #include <image.h>
  30 #include <u-boot/zlib.h>
  31 #include <asm/byteorder.h>
  32 #include <asm/zimage.h>
  33
  34 /*cmd_boot.c*/
  35 int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
  36 {
  37         void            *base_ptr;
  38         ulong           os_data, os_len;
  39         image_header_t  *hdr;
  40
  41 #if defined(CONFIG_FIT)
  42         const void      *data;
  43         size_t          len;
  44 #endif
  45
  46         if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
  47                 return 1;
  48
  49         if (images->legacy_hdr_valid) {
  50                 hdr = images->legacy_hdr_os;
  51                 if (image_check_type (hdr, IH_TYPE_MULTI)) {
  52                         /* if multi-part image, we need to get first subimage */
  53                         image_multi_getimg (hdr, 0, &os_data, &os_len);
  54                 } else {
  55                         /* otherwise get image data */
  56                         os_data = image_get_data (hdr);
  57                         os_len = image_get_data_size (hdr);
  58                 }
  59 #if defined(CONFIG_FIT)
  60         } else if (images->fit_uname_os) {
  61                 ret = fit_image_get_data (images->fit_hdr_os,
  62                                         images->fit_noffset_os, &data, &len);
  63                 if (ret) {
  64                         puts ("Can't get image data/size!\n");
  65                         goto error;
  66                 }
  67                 os_data = (ulong)data;
  68                 os_len = (ulong)len;
  69 #endif
  70         } else {
  71                 puts ("Could not find kernel image!\n");
  72                 goto error;
  73         }
  74
  75         base_ptr = load_zimage ((void*)os_data, os_len,
  76                         images->rd_start, images->rd_end - images->rd_start, 0);
  77
  78         if (NULL == base_ptr) {
  79                 printf ("## Kernel loading failed ...\n");
  80                 goto error;
  81
  82         }
  83
  84 #ifdef DEBUG
  85         printf ("## Transferring control to Linux (at address %08x) ...\n",
  86                 (u32)base_ptr);
  87 #endif
  88
  89         /* we assume that the kernel is in place */
  90         printf("\nStarting kernel ...\n\n");
  91
  92         boot_zimage(base_ptr);
  93         /* does not return */
  94
  95 error:
  96         return 1;
  97 }