49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/*
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
|
* Tony Kou (tonyko@lineo.ca)
|
|
*
|
|
* Licensed under the GPL-2 or later
|
|
*/
|
|
|
|
#ifndef _BLACKFIN_BARRIER_H
|
|
#define _BLACKFIN_BARRIER_H
|
|
|
|
#include <asm/cache.h>
|
|
|
|
#define nop() __asm__ __volatile__ ("nop;\n\t" : : )
|
|
|
|
/*
|
|
* Force strict CPU ordering.
|
|
*/
|
|
#ifdef CONFIG_SMP
|
|
|
|
#ifdef __ARCH_SYNC_CORE_DCACHE
|
|
/* Force Core data cache coherence */
|
|
# define mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
|
|
# define rmb() do { barrier(); smp_check_barrier(); } while (0)
|
|
# define wmb() do { barrier(); smp_mark_barrier(); } while (0)
|
|
# define read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0)
|
|
#else
|
|
# define mb() barrier()
|
|
# define rmb() barrier()
|
|
# define wmb() barrier()
|
|
# define read_barrier_depends() do { } while (0)
|
|
#endif
|
|
|
|
#else /* !CONFIG_SMP */
|
|
|
|
#define mb() barrier()
|
|
#define rmb() barrier()
|
|
#define wmb() barrier()
|
|
#define read_barrier_depends() do { } while (0)
|
|
|
|
#endif /* !CONFIG_SMP */
|
|
|
|
#define smp_mb() mb()
|
|
#define smp_rmb() rmb()
|
|
#define smp_wmb() wmb()
|
|
#define set_mb(var, value) do { var = value; mb(); } while (0)
|
|
#define smp_read_barrier_depends() read_barrier_depends()
|
|
|
|
#endif /* _BLACKFIN_BARRIER_H */
|