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 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 #ifndef _ADM5120_PROM_H_
  16 #define _ADM5120_PROM_H_
  17
  18 /*
  19  * Helper routines
  20  */
  21 static inline u16 prom_read_le16(void *buf)
  22 {
  23         u8 *p = buf;
  24
  25         return ((u16)p[0] + ((u16)p[1] << 8));
  26 }
  27
  28 static inline u32 prom_read_le32(void *buf)
  29 {
  30         u8 *p = buf;
  31
  32         return ((u32)p[0] + ((u32)p[1] << 8) + ((u32)p[2] << 16) +
  33                 ((u32)p[3] << 24));
  34 }
  35
  36 static inline u16 prom_read_be16(void *buf)
  37 {
  38         u8 *p = buf;
  39
  40         return (((u16)p[0] << 8) + (u16)p[1]);
  41 }
  42
  43 static inline u32 prom_read_be32(void *buf)
  44 {
  45         u8 *p = buf;
  46
  47         return (((u32)p[0] << 24) + ((u32)p[1] << 16) + ((u32)p[2] << 8) +
  48                 ((u32)p[3]));
  49 }
  50
  51 #endif /* _ADM5120_PROM_H_ */
  52
  53