linux/arch/openrisc/include/asm/unaligned.h
<<
>>
Prefs
   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * OpenRISC Linux
   4 *
   5 * Linux architectural port borrowing liberally from similar works of
   6 * others.  All original copyrights apply as per the original source
   7 * declaration.
   8 *
   9 * OpenRISC implementation:
  10 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
  11 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
  12 * et al.
  13 */
  14
  15#ifndef __ASM_OPENRISC_UNALIGNED_H
  16#define __ASM_OPENRISC_UNALIGNED_H
  17
  18/*
  19 * This is copied from the generic implementation and the C-struct
  20 * variant replaced with the memmove variant.  The GCC compiler
  21 * for the OR32 arch optimizes too aggressively for the C-struct
  22 * variant to work, so use the memmove variant instead.
  23 *
  24 * It may be worth considering implementing the unaligned access
  25 * exception handler and allowing unaligned accesses (access_ok.h)...
  26 * not sure if it would be much of a performance win without further
  27 * investigation.
  28 */
  29#include <asm/byteorder.h>
  30
  31#if defined(__LITTLE_ENDIAN)
  32# include <linux/unaligned/le_memmove.h>
  33# include <linux/unaligned/be_byteshift.h>
  34# include <linux/unaligned/generic.h>
  35# define get_unaligned  __get_unaligned_le
  36# define put_unaligned  __put_unaligned_le
  37#elif defined(__BIG_ENDIAN)
  38# include <linux/unaligned/be_memmove.h>
  39# include <linux/unaligned/le_byteshift.h>
  40# include <linux/unaligned/generic.h>
  41# define get_unaligned  __get_unaligned_be
  42# define put_unaligned  __put_unaligned_be
  43#else
  44# error need to define endianess
  45#endif
  46
  47#endif /* __ASM_OPENRISC_UNALIGNED_H */
  48