common/cmd_boot.c

   1 /*
   2  * (C) Copyright 2000-2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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 /*
  25  * Misc boot support
  26  */
  27 #include <common.h>
  28 #include <command.h>
  29 #include <net.h>
  30
  31
  32 /* -------------------------------------------------------------------- */
  33
  34 int do_go (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
  35 {
  36 #if defined(CONFIG_I386)
  37         DECLARE_GLOBAL_DATA_PTR;
  38 #endif
  39         ulong   addr, rc;
  40         int     rcode = 0;
  41
  42         if (argc < 2) {
  43                 printf ("Usage:\n%s\n", cmdtp->usage);
  44                 return 1;
  45         }
  46
  47         addr = simple_strtoul(argv[1], NULL, 16);
  48
  49         printf ("## Starting application at 0x%08lX ...\n", addr);
  50
  51         /*
  52          * pass address parameter as argv[0] (aka command name),
  53          * and all remaining args
  54          */
  55 #if defined(CONFIG_I386)
  56         /*
  57          * x86 does not use a dedicated register to pass the pointer
  58          * to the global_data
  59          */
  60         argv[0] = (char *)gd;
  61 #endif
  62 #if !defined(CONFIG_NIOS)
  63         rc = ((ulong (*)(int, char *[]))addr) (--argc, &argv[1]);
  64 #else
  65         /*
  66          * Nios function pointers are address >> 1
  67          */
  68         rc = ((ulong (*)(int, char *[]))(addr>>1)) (--argc, &argv[1]);
  69 #endif
  70         if (rc != 0) rcode = 1;
  71
  72         printf ("## Application terminated, rc = 0x%lX\n", rc);
  73         return rcode;
  74 }
  75
  76 /* -------------------------------------------------------------------- */
  77
  78 U_BOOT_CMD(
  79         go, CFG_MAXARGS, 1,     do_go,
  80         "go      - start application at address 'addr'\n",
  81         "addr [arg ...]\n    - start application at address 'addr'\n"
  82         "      passing 'arg' as arguments\n"
  83 );
  84
  85 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  86
  87 U_BOOT_CMD(
  88         reset, 1, 0,    do_reset,
  89         "reset   - Perform RESET of the CPU\n",
  90         NULL
  91 );