ec2cb43589
Group all definitions for a specific architecture under a single #ifdef. This makes the code more readable. Change-Id: I4e88b9bb63f84b6275f10731aa657739ce6862e3 Signed-off-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/447881 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright (c) Intel Corporation.
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* Copyright (c) 2017, IBM Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \file
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* Memory barriers
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*/
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#ifndef SPDK_BARRIER_H
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#define SPDK_BARRIER_H
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#include "spdk/stdinc.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** Compiler memory barrier */
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#define spdk_compiler_barrier() __asm volatile("" ::: "memory")
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/** Read memory barrier */
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#define spdk_rmb() _spdk_rmb()
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/** Write memory barrier */
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#define spdk_wmb() _spdk_wmb()
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/** Full read/write memory barrier */
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#define spdk_mb() _spdk_mb()
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/** SMP read memory barrier. */
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#define spdk_smp_rmb() _spdk_smp_rmb()
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/** SMP write memory barrier. */
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#define spdk_smp_wmb() _spdk_smp_wmb()
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/** SMP read/write memory barrier. */
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#define spdk_smp_mb() _spdk_smp_mb()
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#ifdef __PPC64__
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#define _spdk_rmb() __asm volatile("sync" ::: "memory")
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#define _spdk_wmb() __asm volatile("sync" ::: "memory")
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#define _spdk_mb() __asm volatile("sync" ::: "memory")
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#define _spdk_smp_rmb() __asm volatile("lwsync" ::: "memory")
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#define _spdk_smp_wmb() __asm volatile("lwsync" ::: "memory")
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#define _spdk_smp_mb() spdk_mb()
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#elif defined(__aarch64__)
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#define _spdk_rmb() __asm volatile("dsb ld" ::: "memory")
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#define _spdk_wmb() __asm volatile("dsb st" ::: "memory")
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#define _spdk_mb() __asm volatile("dsb sy" ::: "memory")
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#define _spdk_smp_rmb() __asm volatile("dmb ishld" ::: "memory")
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#define _spdk_smp_wmb() __asm volatile("dmb ishst" ::: "memory")
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#define _spdk_smp_mb() __asm volatile("dmb ish" ::: "memory")
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#elif defined(__i386__) || defined(__x86_64__)
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#define _spdk_rmb() __asm volatile("lfence" ::: "memory")
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#define _spdk_wmb() __asm volatile("sfence" ::: "memory")
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#define _spdk_mb() __asm volatile("mfence" ::: "memory")
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#define _spdk_smp_rmb() spdk_compiler_barrier()
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#define _spdk_smp_wmb() spdk_compiler_barrier()
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#if defined(__x86_64__)
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#define _spdk_smp_mb() __asm volatile("lock addl $0, -128(%%rsp); " ::: "memory");
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#elif defined(__i386__)
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#define _spdk_smp_mb() __asm volatile("lock addl $0, -128(%%esp); " ::: "memory");
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#endif
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#else
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#define _spdk_rmb()
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#define _spdk_wmb()
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#define _spdk_mb()
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#define _spdk_smp_rmb()
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#define _spdk_smp_wmb()
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#define _spdk_smp_mb()
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#error Unknown architecture
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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