2 * Copyright 2004-2009 Analog Devices Inc.
3 * Tony Kou (tonyko@lineo.ca)
5 * Licensed under the GPL-2 or later
8 #ifndef _BLACKFIN_BARRIER_H
9 #define _BLACKFIN_BARRIER_H
11 #include <asm/cache.h>
13 #define nop() __asm__ __volatile__ ("nop;\n\t" : : )
16 * Force strict CPU ordering.
20 #ifdef __ARCH_SYNC_CORE_DCACHE
21 /* Force Core data cache coherence */
22 # define mb() do { barrier(); smp_check_barrier(); smp_mark_barrier(); } while (0)
23 # define rmb() do { barrier(); smp_check_barrier(); } while (0)
24 # define wmb() do { barrier(); smp_mark_barrier(); } while (0)
25 # define read_barrier_depends() do { barrier(); smp_check_barrier(); } while (0)
28 #endif /* !CONFIG_SMP */
30 #define smp_mb__before_atomic() barrier()
31 #define smp_mb__after_atomic() barrier()
33 #include <asm-generic/barrier.h>
35 #endif /* _BLACKFIN_BARRIER_H */