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