1/*-
2 * Kernel interface to machine-dependent clock driver.
3 * Garrett Wollman, September 1994.
4 * This file is in the public domain.
5 */
6
7#ifndef _MACHINE_CLOCK_H_
8#define _MACHINE_CLOCK_H_
9
10#ifdef _KERNEL
11/*
12 * i386 to clock driver interface.
13 * XXX large parts of the driver and its interface are misplaced.
14 */
15extern int clkintr_pending;
16extern u_int i8254_freq;
17extern int i8254_max_count;
18extern uint64_t tsc_freq;
19extern int tsc_is_invariant;
20extern int tsc_perf_stat;
21#ifdef SMP
22extern int smp_tsc;
23#endif
24
25void i8254_init(void);
26void i8254_delay(int);
27void clock_init(void);
28void lapic_calibrate(void);
29void tsc_init(void);
30void tsc_calibrate(void);
31
32/*
33 * Driver to clock driver interface.
34 */
35
36void startrtclock(void);
37void start_TSC(void);
38void resume_TSC(void);
39
40#define HAS_TIMER_SPKR 1
41int timer_spkr_acquire(void);
42int timer_spkr_release(void);
43void timer_spkr_setfreq(int freq);
44
45#endif /* _KERNEL */
46
47#endif /* !_MACHINE_CLOCK_H_ */