1 /* 2 * Copyright (C) 2004-2006 Atmel Corporation 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 #ifndef __ASM_AVR32_BARRIER_H 9 #define __ASM_AVR32_BARRIER_H 10 11 #define nop() asm volatile("nop") 12 13 #define mb() asm volatile("" : : : "memory") 14 #define rmb() mb() 15 #define wmb() asm volatile("sync 0" : : : "memory") 16 #define read_barrier_depends() do { } while(0) 17 #define set_mb(var, value) do { var = value; mb(); } while(0) 18 19 #ifdef CONFIG_SMP 20 # error "The AVR32 port does not support SMP" 21 #else 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 #endif 27 28 29 #endif /* __ASM_AVR32_BARRIER_H */ 30