/*
 * Mach Operating System
 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */

#ifndef	_KERN_TIME_STAMP_H_
#define _KERN_TIME_STAMP_H_

#include <machine/time_stamp.h>
/*
 *	time_stamp.h -- definitions for low-overhead timestamps.
 */

struct tsval {
	unsigned	low_val;	/* least significant word */
	unsigned	high_val;	/* most significant word */
};

/*
 *	Format definitions.
 */

#ifndef	TS_FORMAT
/*
 *	Default case - Just return a tick count for machines that
 *	don't support or haven't implemented this.  Assume 100Hz ticks.
 *
 *	low_val - Always 0.
 *	high_val - tick count.
 */
#define	TS_FORMAT	1

#if	KERNEL
extern unsigned	ts_tick_count;
#endif	/* KERNEL */
#endif	/* TS_FORMAT */

/*
 *	List of all format definitions for convert_ts_to_tv.
 */

#define	TS_FORMAT_DEFAULT	1
#define TS_FORMAT_MMAX		2

extern void timestamp_init(void);

#endif	/* _KERN_TIME_STAMP_H_ */