xref: /freebsd/sys/x86/include/clock.h (revision 681ce946f33e75c590e97c53076e86dff1fe8f4a)
1 /*-
2  * Kernel interface to machine-dependent clock driver.
3  * Garrett Wollman, September 1994.
4  * This file is in the public domain.
5  *
6  * $FreeBSD$
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  */
17 extern int	clkintr_pending;
18 extern u_int	i8254_freq;
19 extern int	i8254_max_count;
20 extern uint64_t	tsc_freq;
21 extern int	tsc_is_invariant;
22 extern int	tsc_perf_stat;
23 #ifdef SMP
24 extern int	smp_tsc;
25 #endif
26 
27 void	i8254_init(void);
28 void	i8254_delay(int);
29 void	clock_init(void);
30 void	lapic_calibrate(void);
31 void	tsc_calibrate(void);
32 
33 /*
34  * Driver to clock driver interface.
35  */
36 
37 void	startrtclock(void);
38 void	init_TSC(void);
39 void	resume_TSC(void);
40 
41 #define	HAS_TIMER_SPKR 1
42 int	timer_spkr_acquire(void);
43 int	timer_spkr_release(void);
44 void	timer_spkr_setfreq(int freq);
45 
46 #endif /* _KERNEL */
47 
48 #endif /* !_MACHINE_CLOCK_H_ */
49