35 lines
896 B
C
35 lines
896 B
C
/*
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* \brief ARMv7-specific part of the Linux API emulation
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* \author Christian Prochaska
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* \date 2014-05-28
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*/
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/*
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* Copyright (C) 2014-2017 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/*******************
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** asm/barrier.h **
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*******************/
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#define mb() asm volatile ("dsb": : :"memory")
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#define rmb() mb()
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#define wmb() asm volatile ("dsb st": : :"memory")
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#define dma_wmb() asm volatile ("dmb oshst": : : "memory")
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#define dma_rmb() asm volatile ("dmb osh": : : "memory")
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/*
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* This is the "safe" implementation as needed for a configuration
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* with bufferable DMA memory and SMP enabled.
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*/
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#define smp_mb() asm volatile ("dmb ish": : :"memory")
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#define smp_rmb() smp_mb()
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#define smp_wmb() asm volatile ("dmb ishst": : :"memory")
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static inline void barrier() { asm volatile ("": : :"memory"); }
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