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 #ifdef CONFIG_CMD_GO
  32
  33 /* Allow ports to override the default behavior */
  34 __attribute__((weak))
  35 unsigned long do_go_exec (ulong (*entry)(int, char * const []), int argc, char * const argv[])
  36 {
  37         return entry (argc, argv);
  38 }
  39
  40 int do_go (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  41 {
  42         ulong   addr, rc;
  43         int     rcode = 0;
  44
  45         if (argc < 2)
  46                 return CMD_RET_USAGE;
  47
  48         addr = simple_strtoul(argv[1], NULL, 16);
  49
  50         printf ("## Starting application at 0x%08lX ...\n", addr);
  51
  52         /*
  53          * pass address parameter as argv[0] (aka command name),
  54          * and all remaining args
  55          */
  56         rc = do_go_exec ((void *)addr, argc - 1, argv + 1);
  57         if (rc != 0) rcode = 1;
  58
  59         printf ("## Application terminated, rc = 0x%lX\n", rc);
  60         return rcode;
  61 }
  62
  63 /* -------------------------------------------------------------------- */
  64
  65 U_BOOT_CMD(
  66         go, CONFIG_SYS_MAXARGS, 1,      do_go,
  67         "start application at address 'addr'",
  68         "addr [arg ...]\n    - start application at address 'addr'\n"
  69         "      passing 'arg' as arguments"
  70 );
  71
  72 #endif
  73
  74 U_BOOT_CMD(
  75         reset, 1, 0,    do_reset,
  76         "Perform RESET of the CPU",
  77         ""
  78 );