target/linux/adm5120-2.6/files/arch/mips/adm5120/prom/generic.c

   1 /*
   2  *  $Id$
   3  *
   4  *  Generic PROM routines
   5  *
   6  *  Copyright (C) 2007 OpenWrt.org
   7  *  Copyright (C) 2007 Gabor Juhos <juhosg at openwrt.org>
   8  *
   9  *  This program is free software; you can redistribute it and/or
  10  *  modify it under the terms of the GNU General Public License
  11  *  as published by the Free Software Foundation; either version 2
  12  *  of the License, or (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, write to the
  21  *  Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  22  *  Boston, MA  02110-1301, USA.
  23  */
  24
  25 #include <linux/kernel.h>
  26 #include <linux/init.h>
  27 #include <linux/string.h>
  28
  29 #include <asm/bootinfo.h>
  30
  31 #include <prom/generic.h>
  32
  33 static int *_prom_argc;
  34 static char **_prom_argv;
  35 static char **_prom_envp;
  36
  37 char *generic_prom_getenv(char *envname)
  38 {
  39         char **env;
  40         char *ret;
  41
  42         ret = NULL;
  43         for (env = _prom_envp; *env != NULL; env++) {
  44                 if (strcmp(envname, *env++) == 0) {
  45                         ret = *env;
  46                         break;
  47                 }
  48         }
  49
  50         return ret;
  51 }
  52
  53 int generic_prom_present(void)
  54 {
  55         _prom_argc = (int *)fw_arg0;
  56         _prom_argv = (char **)fw_arg1;
  57         _prom_envp = (char **)fw_arg2;
  58
  59         return 1;
  60 }