clock.h revision 177628 
1/*-
2 * Kernel interface to machine-dependent clock driver.
3 * Garrett Wollman, September 1994.
4 * This file is in the public domain.
5 *
6 * $FreeBSD: head/sys/amd64/include/clock.h 177628 2008-03-26 13:25:27Z phk $
7 */
8
9#ifndef _MACHINE_CLOCK_H_
10#define	_MACHINE_CLOCK_H_
11
12#ifdef _KERNEL
13/*
14 * i386 to clock driver interface.
15 * XXX large parts of the driver and its interface are misplaced.
16 */
17extern int	clkintr_pending;
18extern int	statclock_disable;
19extern u_int	timer_freq;
20extern int	timer0_max_count;
21extern uint64_t	tsc_freq;
22extern int	tsc_is_broken;
23
24void	i8254_init(void);
25
26/*
27 * Driver to clock driver interface.
28 */
29
30int	acquire_timer2(int mode);
31int	release_timer2(void);
32int	rtcin(int reg);
33void	writertc(int reg, unsigned char val);
34int	sysbeep(int pitch, int period);
35void	init_TSC(void);
36void	init_TSC_tc(void);
37
38#endif /* _KERNEL */
39
40#endif /* !_MACHINE_CLOCK_H_ */
41