barrier.h

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#ifndef _H8300_BARRIER_H
#define _H8300_BARRIER_H

#define nop()  asm volatile ("nop"::)

/*
 * Force strict CPU ordering.
 * Not really required on H8...
 */
#define mb()   asm volatile (""   : : :"memory")
#define rmb()  asm volatile (""   : : :"memory")
#define wmb()  asm volatile (""   : : :"memory")
#define set_mb(var, value) do { xchg(&var, value); } while (0)

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

#endif /* _H8300_BARRIER_H */