35 lines
899 B
C++
35 lines
899 B
C++
/*
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* \brief Memory barrier
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* \author Stefan Kalkowski
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* \date 2019-03-25
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*
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* The memory barrier prevents memory accesses from being reordered in such a
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* way that accesses to the guarded resource get outside the guarded stage. As
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* cmpxchg() defines the start of the guarded stage it also represents an
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* effective memory barrier.
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*/
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/*
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* Copyright (C) 2019 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__SPEC__ARM_64__CPU__MEMORY_BARRIER_H_
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#define _INCLUDE__SPEC__ARM_64__CPU__MEMORY_BARRIER_H_
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namespace Genode {
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static inline void memory_barrier()
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{
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/*
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* Be conversative for the time-being and synchronize with all level
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*/
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asm volatile ("dsb #15" ::: "memory");
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}
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}
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#endif /* _INCLUDE__SPEC__ARM_64__CPU__MEMORY_BARRIER_H_ */
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