target/linux/adm5120/files/arch/mips/adm5120/prom/prom_read.h

   1 /*
   2  *  $Id$
   3  *
   4  *  Generic prom definitions
   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 #ifndef _ADM5120_PROM_H_
  26 #define _ADM5120_PROM_H_
  27
  28 /*
  29  * Helper routines
  30  */
  31 static inline u16 prom_read_le16(void *buf)
  32 {
  33         u8 *p = buf;
  34
  35         return ((u16)p[0] + ((u16)p[1] << 8));
  36 }
  37
  38 static inline u32 prom_read_le32(void *buf)
  39 {
  40         u8 *p = buf;
  41
  42         return ((u32)p[0] + ((u32)p[1] << 8) + ((u32)p[2] << 16) +
  43                 ((u32)p[3] << 24));
  44 }
  45
  46 static inline u16 prom_read_be16(void *buf)
  47 {
  48         u8 *p = buf;
  49
  50         return (((u16)p[0] << 8) + (u16)p[1]);
  51 }
  52
  53 static inline u32 prom_read_be32(void *buf)
  54 {
  55         u8 *p = buf;
  56
  57         return (((u32)p[0] << 24) + ((u32)p[1] << 16) + ((u32)p[2] << 8) +
  58                 ((u32)p[3]));
  59 }
  60
  61 #endif /* _ADM5120_PROM_H_ */
  62
  63