arch/openrisc/include/asm/unaligned.h

   1 /*
   2  * OpenRISC Linux
   3  *
   4  * Linux architectural port borrowing liberally from similar works of
   5  * others.  All original copyrights apply as per the original source
   6  * declaration.
   7  *
   8  * OpenRISC implementation:
   9  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  10  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  11  * et al.
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  */
  18
  19 #ifndef __ASM_OPENRISC_UNALIGNED_H
  20 #define __ASM_OPENRISC_UNALIGNED_H
  21
  22 /*
  23  * This is copied from the generic implementation and the C-struct
  24  * variant replaced with the memmove variant.  The GCC compiler
  25  * for the OR32 arch optimizes too aggressively for the C-struct
  26  * variant to work, so use the memmove variant instead.
  27  *
  28  * It may be worth considering implementing the unaligned access
  29  * exception handler and allowing unaligned accesses (access_ok.h)...
  30  * not sure if it would be much of a performance win without further
  31  * investigation.
  32  */
  33 #include <asm/byteorder.h>
  34
  35 #if defined(__LITTLE_ENDIAN)
  36 # include <linux/unaligned/le_memmove.h>
  37 # include <linux/unaligned/be_byteshift.h>
  38 # include <linux/unaligned/generic.h>
  39 # define get_unaligned  __get_unaligned_le
  40 # define put_unaligned  __put_unaligned_le
  41 #elif defined(__BIG_ENDIAN)
  42 # include <linux/unaligned/be_memmove.h>
  43 # include <linux/unaligned/le_byteshift.h>
  44 # include <linux/unaligned/generic.h>
  45 # define get_unaligned  __get_unaligned_be
  46 # define put_unaligned  __put_unaligned_be
  47 #else
  48 # error need to define endianess
  49 #endif
  50
  51 #endif /* __ASM_OPENRISC_UNALIGNED_H */