1 /* FR-V CPU memory barrier definitions 2 * 3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved. 4 * Written by David Howells (dhowells@redhat.com) 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 */ 11 12 #ifndef _ASM_BARRIER_H 13 #define _ASM_BARRIER_H 14 15 #define nop() asm volatile ("nop"::) 16 17 #define mb() asm volatile ("membar" : : :"memory") 18 #define rmb() asm volatile ("membar" : : :"memory") 19 #define wmb() asm volatile ("membar" : : :"memory") 20 #define read_barrier_depends() do { } while (0) 21 22 #define smp_mb() barrier() 23 #define smp_rmb() barrier() 24 #define smp_wmb() barrier() 25 #define smp_read_barrier_depends() do {} while(0) 26 #define set_mb(var, value) \ 27 do { var = (value); barrier(); } while (0) 28 29 #endif /* _ASM_BARRIER_H */ 30