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__ */