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