lib_microblaze/bootm.c

   1 /*
   2  * (C) Copyright 2007 Michal Simek
   3  * (C) Copyright 2004 Atmark Techno, Inc.
   4  *
   5  * Michal  SIMEK <monstr@monstr.eu>
   6  * Yasushi SHOJI <yashi@atmark-techno.com>
   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 <zlib.h>
  31 #include <asm/byteorder.h>
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  36
  37 void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
  38                      bootm_headers_t *images)
  39 {
  40         /* First parameter is mapped to $r5 for kernel boot args */
  41         void    (*theKernel) (char *);
  42         char    *commandline = getenv ("bootargs");
  43         ulong   ep = 0;
  44
  45         /* find kernel entry point */
  46         if (images->legacy_hdr_valid) {
  47                 ep = image_get_ep (images->legacy_hdr_os);
  48 #if defined(CONFIG_FIT)
  49         } else if (images->fit_uname_os) {
  50                 int ret = fit_image_get_entry (images->fit_hdr_os,
  51                                 images->fit_noffset_os, &ep);
  52                 if (ret) {
  53                         puts ("Can't get entry point property!\n");
  54                         goto error;
  55                 }
  56 #endif
  57         } else {
  58                 puts ("Could not find kernel entry point!\n");
  59                 goto error;
  60         }
  61         theKernel = (void (*)(char *))ep;
  62
  63         show_boot_progress (15);
  64
  65 #ifdef DEBUG
  66         printf ("## Transferring control to Linux (at address %08lx) ...\n",
  67                 (ulong) theKernel);
  68 #endif
  69
  70         if (!images->autostart)
  71                 return ;
  72
  73         theKernel (commandline);
  74         /* does not return */
  75         return;
  76
  77 error:
  78         if (images->autostart)
  79                 do_reset (cmdtp, flag, argc, argv);
  80         return;
  81 }