CooCenter-System-kernel/arch/openrisc/include/asm/unaligned.h

/*
 * OpenRISC Linux
 *
 * Linux architectural port borrowing liberally from similar works of
 * others.  All original copyrights apply as per the original source
 * declaration.
 *
 * OpenRISC implementation:
 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 * et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef __ASM_OPENRISC_UNALIGNED_H
#define __ASM_OPENRISC_UNALIGNED_H

/*
 * This is copied from the generic implementation and the C-struct
 * variant replaced with the memmove variant.  The GCC compiler
 * for the OR32 arch optimizes too aggressively for the C-struct
 * variant to work, so use the memmove variant instead.
 *
 * It may be worth considering implementing the unaligned access
 * exception handler and allowing unaligned accesses (access_ok.h)...
 * not sure if it would be much of a performance win without further
 * investigation.
 */
#include <asm/byteorder.h>

#if defined(__LITTLE_ENDIAN)
# include <linux/unaligned/le_memmove.h>
# include <linux/unaligned/be_byteshift.h>
# include <linux/unaligned/generic.h>
# define get_unaligned	__get_unaligned_le
# define put_unaligned	__put_unaligned_le
#elif defined(__BIG_ENDIAN)
# include <linux/unaligned/be_memmove.h>
# include <linux/unaligned/le_byteshift.h>
# include <linux/unaligned/generic.h>
# define get_unaligned	__get_unaligned_be
# define put_unaligned	__put_unaligned_be
#else
# error need to define endianess
#endif

#endif /* __ASM_OPENRISC_UNALIGNED_H */