clock.h revision 33690 
1/*
2 * Kernel interface to machine-dependent clock driver.
3 * Garrett Wollman, September 1994.
4 * This file is in the public domain.
5 *
6 *	$Id: clock.h,v 1.31 1998/02/01 22:45:23 bde Exp $
7 */
8
9#ifndef _MACHINE_CLOCK_H_
10#define	_MACHINE_CLOCK_H_
11
12#define	TSC_COMULTIPLIER_SHIFT	20
13#define	TSC_MULTIPLIER_SHIFT	32
14
15#ifdef KERNEL
16/*
17 * i386 to clock driver interface.
18 * XXX almost all of it is misplaced.  i586 stuff is done in isa/clock.c
19 * and isa stuff is done in i386/microtime.s and i386/support.s.
20 */
21extern int	adjkerntz;
22extern int	disable_rtc_set;
23extern int	statclock_disable;
24extern u_int	timer_freq;
25extern int	timer0_max_count;
26extern u_int	tsc_freq;
27extern int	wall_cmos_clock;
28
29/*
30 * Driver to clock driver interface.
31 */
32struct clockframe;
33
34void	DELAY __P((int usec));
35int	acquire_timer0 __P((int rate,
36			    void (*function)(struct clockframe *frame)));
37int	acquire_timer2 __P((int mode));
38int	release_timer0 __P((void));
39int	release_timer2 __P((void));
40#ifndef PC98
41int	rtcin __P((int val));
42#else
43int	acquire_timer1 __P((int mode));
44int	release_timer1 __P((void));
45#endif
46int	sysbeep __P((int pitch, int period));
47
48#endif /* KERNEL */
49
50#endif /* !_MACHINE_CLOCK_H_ */
51