target/linux/adm5120/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 modify it
  10  *  under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/init.h>
  17 #include <linux/string.h>
  18
  19 #include <asm/bootinfo.h>
  20
  21 #include <prom/generic.h>
  22
  23 static int *_prom_argc;
  24 static char **_prom_argv;
  25 static char **_prom_envp;
  26
  27 char *generic_prom_getenv(char *envname)
  28 {
  29         char **env;
  30         char *ret;
  31
  32         ret = NULL;
  33         for (env = _prom_envp; *env != NULL; env++) {
  34                 if (strcmp(envname, *env++) == 0) {
  35                         ret = *env;
  36                         break;
  37                 }
  38         }
  39
  40         return ret;
  41 }
  42
  43 int generic_prom_present(void)
  44 {
  45         _prom_argc = (int *)fw_arg0;
  46         _prom_argv = (char **)fw_arg1;
  47         _prom_envp = (char **)fw_arg2;
  48
  49         return 1;
  50 }