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/*
* Mach Operating System
* Copyright (c) 1991 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 _I386_TIMER_H_
#define _I386_TIMER_H_
/*
* Machine dependent timer definitions.
*/
#include <platforms.h>
#ifdef SYMMETRY
/*
* TIMER_MAX is not used on the Sequent because a 32-bit rollover
* timer does not need to be adjusted for maximum value.
*/
/*
* TIMER_RATE is the rate of the timer in ticks per second.
* It is used to calculate percent cpu usage.
*/
#define TIMER_RATE 1000000
/*
* TIMER_HIGH_UNIT is the unit for high_bits in terms of low_bits.
* Setting it to TIMER_RATE makes the high unit seconds.
*/
#define TIMER_HIGH_UNIT TIMER_RATE
/*
* TIMER_ADJUST is used to adjust the value of a timer after
* it has been copied into a time_value_t. No adjustment is needed
* on Sequent because high_bits is in seconds.
*/
/*
* MACHINE_TIMER_ROUTINES should defined if the timer routines are
* implemented in machine-dependent code (e.g. assembly language).
*/
#define MACHINE_TIMER_ROUTINES
#endif
#endif /* _I386_TIMER_H_ */
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