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- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2001 - 2012 Tensilica Inc.
- */
- #ifndef _XTENSA_SYSTEM_H
- #define _XTENSA_SYSTEM_H
- #define smp_read_barrier_depends() do { } while(0)
- #define read_barrier_depends() do { } while(0)
- #define mb() ({ __asm__ __volatile__("memw" : : : "memory"); })
- #define rmb() barrier()
- #define wmb() mb()
- #ifdef CONFIG_SMP
- #error smp_* not defined
- #else
- #define smp_mb() barrier()
- #define smp_rmb() barrier()
- #define smp_wmb() barrier()
- #endif
- #define set_mb(var, value) do { var = value; mb(); } while (0)
- #endif /* _XTENSA_SYSTEM_H */
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