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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2021 Vladimir Kondratyev <wulf@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _ASM_BARRIER_H_
#define _ASM_BARRIER_H_
#include <sys/types.h>
#include <machine/atomic.h>
#include <asm/atomic.h>
#include <linux/compiler.h>
/* TODO: Check other archs for atomic_thread_fence_* useability */
#if defined(__amd64__) || defined(__i386__)
#define smp_mb() atomic_thread_fence_seq_cst()
#define smp_wmb() atomic_thread_fence_rel()
#define smp_rmb() atomic_thread_fence_acq()
#define smp_store_mb(x, v) do { (void)xchg(&(x), v); } while (0)
#endif
#ifndef smp_mb
#define smp_mb() mb()
#endif
#ifndef smp_wmb
#define smp_wmb() wmb()
#endif
#ifndef smp_rmb
#define smp_rmb() rmb()
#endif
#ifndef smp_store_mb
#define smp_store_mb(x, v) do { WRITE_ONCE(x, v); smp_mb(); } while (0)
#endif
#endif /* _ASM_BARRIER_H_ */
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