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#if XCHAL_HAVE_S32C1I 19#define __smp_mb__before_atomic() barrier() 20#define __smp_mb__after_atomic() barrier() 21#endif 22 23#include <asm-generic/barrier.h> 24 25#endif /* _XTENSA_SYSTEM_H */ 26