lib_nios2/bootm.c

   1 /*
   2  * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (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,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <command.h>
  26 #include <asm/byteorder.h>
  27
  28 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  29
  30 void do_bootm_linux(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
  31                 bootm_headers_t *images)
  32 {
  33         ulong   ep = 0;
  34
  35         /* find kernel entry point */
  36         if (images->legacy_hdr_valid) {
  37                 ep = image_get_ep (images->legacy_hdr_os);
  38 #if defined(CONFIG_FIT)
  39         } else if (images->fit_uname_os) {
  40                 int ret = fit_image_get_entry (images->fit_hdr_os,
  41                                 images->fit_noffset_os, &ep);
  42                 if (ret) {
  43                         puts ("Can't get entry point property!\n");
  44                         goto error;
  45                 }
  46 #endif
  47         } else {
  48                 puts ("Could not find kernel entry point!\n");
  49                 goto error;
  50         }
  51         void (*kernel)(void) = (void (*)(void))ep;
  52
  53         if (!images->autostart)
  54                 return ;
  55
  56         /* For now we assume the Microtronix linux ... which only
  57          * needs to be called ;-)
  58          */
  59         kernel ();
  60         /* does not return */
  61         return;
  62
  63 error:
  64         if (images->autostart)
  65                 do_reset (cmdtp, flag, argc, argv);
  66         return;
  67 }