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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
29 /*
30  * Driver to clock driver interface.
31  */
32
33 void    startrtclock(void);
34 void    init_TSC(void);
35
36 #define HAS_TIMER_SPKR 1
37 int     timer_spkr_acquire(void);
38 int     timer_spkr_release(void);
39 void    timer_spkr_setfreq(int freq);
40
41 #endif /* _KERNEL */
42
43 #endif /* !_MACHINE_CLOCK_H_ */