target/linux/ubicom32/files/arch/ubicom32/mach-common/bootargs.c

   1 /*
   2  * arch/ubicom32/mach-common/bootargs.c
   3  *   Board init and support code.
   4  *
   5  * (C) Copyright 2009, Ubicom, Inc.
   6  *
   7  * This file is part of the Ubicom32 Linux Kernel Port.
   8  *
   9  * The Ubicom32 Linux Kernel Port is free software: you can redistribute
  10  * it and/or modify it under the terms of the GNU General Public License
  11  * as published by the Free Software Foundation, either version 2 of the
  12  * License, or (at your option) any later version.
  13  *
  14  * The Ubicom32 Linux Kernel Port is distributed in the hope that it
  15  * will be useful, but WITHOUT ANY WARRANTY; without even the implied
  16  * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  * the GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with the Ubicom32 Linux Kernel Port.  If not,
  21  * see <http://www.gnu.org/licenses/>.
  22  *
  23  * Ubicom32 implementation derived from (with many thanks):
  24  *   arch/m68knommu
  25  *   arch/blackfin
  26  *   arch/parisc
  27  */
  28 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/cpu.h>
  31 #include <asm/devtree.h>
  32
  33 struct bootargsnode {
  34         struct devtree_node dn;
  35         const char cmdline[512];
  36 };
  37
  38 static const struct bootargsnode *ban;
  39
  40 /*
  41  * bootargs_get_cmdline()
  42  *      Returns kernel boot arguments set by the bootloader.
  43  */
  44 const char *bootargs_get_cmdline(void)
  45 {
  46         if (!ban) {
  47                 return "";
  48         }
  49
  50         return ban->cmdline;
  51 }
  52
  53 /*
  54  * bootargs_init
  55  */
  56 void __init bootargs_init(void)
  57 {
  58         ban = (struct bootargsnode *)devtree_find_node("bootargs");
  59         if (!ban) {
  60                 printk(KERN_WARNING "bootargs node not found\n");
  61                 return;
  62         }
  63 }