LXR linux/arch/unicore32/include/asm/barrier.h

   1/*
   2 * Memory barrier implementations for PKUnity SoC and UniCore ISA
   3 *
   4 * Copyright (C) 2001-2012 GUAN Xue-tao
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10#ifndef __UNICORE_BARRIER_H__
  11#define __UNICORE_BARRIER_H__
  12
  13#define isb() __asm__ __volatile__ ("" : : : "memory")
  14#define dsb() __asm__ __volatile__ ("" : : : "memory")
  15#define dmb() __asm__ __volatile__ ("" : : : "memory")
  16
  17#define mb()                            barrier()
  18#define rmb()                           barrier()
  19#define wmb()                           barrier()
  20#define smp_mb()                        barrier()
  21#define smp_rmb()                       barrier()
  22#define smp_wmb()                       barrier()
  23#define read_barrier_depends()          do { } while (0)
  24#define smp_read_barrier_depends()      do { } while (0)
  25
  26#define set_mb(var, value)              do { var = value; smp_mb(); } while (0)
  27
  28#endif /* __UNICORE_BARRIER_H__ */
  29