clock.h revision 219461 
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 219461 2011-03-10 20:02:58Z jkim $
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 u_int	i8254_freq;
19extern int	i8254_max_count;
20extern uint64_t	tsc_freq;
21extern int	tsc_is_invariant;
22
23void	i8254_init(void);
24
25/*
26 * Driver to clock driver interface.
27 */
28
29void	startrtclock(void);
30void	init_TSC(void);
31void	init_TSC_tc(void);
32
33#define	HAS_TIMER_SPKR 1
34int	timer_spkr_acquire(void);
35int	timer_spkr_release(void);
36void	timer_spkr_setfreq(int freq);
37
38#endif /* _KERNEL */
39
40#endif /* !_MACHINE_CLOCK_H_ */
41