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