/* $OpenBSD: atomic.h,v 1.3 2020/07/08 15:53:59 visa Exp $ */

/*
 * Copyright (c) 2017 Visa Hankala
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef _OCTEON_ATOMIC_H_
#define _OCTEON_ATOMIC_H_

#ifdef _KERNEL

static inline void
octeon_syncw(void)
{
        __asm__ volatile (
        "       .set push\n"
        "       .set arch=octeon\n"
        /* Issue the barrier twice to work around CN3xxx erratum Core-401.
         * A single syncw might not enforce write ordering properly. */
        "       syncw\n"
        "       syncw\n"
        "       .set pop\n"
        : : : "memory");
}

#define membar_consumer()       __asm__ volatile ("" : : : "memory")
#define membar_producer()       octeon_syncw()

#endif /* _KERNEL */

#include <mips64/atomic.h>

#endif /* !_OCTEON_ATOMIC_H_ */