arch/openrisc/include/asm/unaligned.h

   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 */