barrier.h

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/*
 * Memory barrier implementations for PKUnity SoC and UniCore ISA
 *
 * Copyright (C) 2001-2012 GUAN Xue-tao
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __UNICORE_BARRIER_H__
#define __UNICORE_BARRIER_H__

#define isb() __asm__ __volatile__ ("" : : : "memory")
#define dsb() __asm__ __volatile__ ("" : : : "memory")
#define dmb() __asm__ __volatile__ ("" : : : "memory")

#define mb()                barrier()
#define rmb()               barrier()
#define wmb()               barrier()
#define smp_mb()            barrier()
#define smp_rmb()           barrier()
#define smp_wmb()           barrier()
#define read_barrier_depends()      do { } while (0)
#define smp_read_barrier_depends()  do { } while (0)

#define set_mb(var, value)      do { var = value; smp_mb(); } while (0)

#endif /* __UNICORE_BARRIER_H__ */