/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _ASM_CLOCK_H
#define _ASM_CLOCK_H

#include <sys/ccompile.h>
#include <sys/types.h>
#include <sys/time.h>

#ifdef  __cplusplus
extern "C" {
#endif

#if !defined(__lint) && defined(__GNUC__)

#include <sys/machlock.h>

extern __GNU_INLINE void
unlock_hres_lock(void)
{
        __asm__ __volatile__(
            "lock; incl %0"
            : /* no output */
            : "m" (hres_lock)
            : "cc");
}

#if defined(__xpv)

extern __GNU_INLINE hrtime_t
__rdtsc_insn(void)
{
#if defined(__amd64)
        uint32_t lobits, hibits;

        __asm__ __volatile__(
            "rdtsc"
            : "=a" (lobits), "=d" (hibits));
        return (lobits | ((hrtime_t)hibits << 32));
#elif defined(__i386)
        hrtime_t __value;

        __asm__ __volatile__(
            "rdtsc"
            : "=A" (__value));
        return (__value);
#else
#error  "port me"
#endif
}

#endif /* __xpv */

#endif  /* !__lint && __GNUC__ */

#ifdef  __cplusplus
}
#endif

#endif  /* _ASM_CLOCK_H */