1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2001 - 2012 Tensilica Inc. 7 */ 8 9 #ifndef _XTENSA_SYSTEM_H 10 #define _XTENSA_SYSTEM_H 11 12 #include <asm/core.h> 13 14 #define __mb() ({ __asm__ __volatile__("memw" : : : "memory"); }) 15 #define __rmb() barrier() 16 #define __wmb() __mb() 17 18 #ifdef CONFIG_SMP 19 #define __smp_mb() __mb() 20 #define __smp_rmb() __rmb() 21 #define __smp_wmb() __wmb() 22 #endif 23 24 #if XCHAL_HAVE_S32C1I 25 #define __smp_mb__before_atomic() barrier() 26 #define __smp_mb__after_atomic() barrier() 27 #endif 28 29 #include <asm-generic/barrier.h> 30 31 #endif /* _XTENSA_SYSTEM_H */ 32