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 */ 17extern int clkintr_pending; 18extern u_int i8254_freq; 19extern int i8254_max_count; 20extern uint64_t tsc_freq; 21extern int tsc_is_invariant; 22extern int tsc_perf_stat; 23 24void i8254_init(void); 25void i8254_delay(int); 26void clock_init(void); 27 28/* 29 * Driver to clock driver interface. 30 */ 31 32void startrtclock(void); 33void timer_restore(void); 34void init_TSC(void); 35void resume_TSC(void); 36 37#define HAS_TIMER_SPKR 1 38int timer_spkr_acquire(void); 39int timer_spkr_release(void); 40void timer_spkr_setfreq(int freq); 41 42#endif /* _KERNEL */ 43 44#endif /* !_MACHINE_CLOCK_H_ */ 45