clock.h revision 184102
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/i386/include/clock.h 184102 2008-10-21 00:38:00Z 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 int statclock_disable; 19extern u_int i8254_freq; 20extern int i8254_max_count; 21extern uint64_t tsc_freq; 22extern int tsc_is_broken; 23extern int tsc_is_invariant; 24 25void i8254_init(void); 26 27/* 28 * Driver to clock driver interface. 29 */ 30 31void startrtclock(void); 32void timer_restore(void); 33void init_TSC(void); 34void init_TSC_tc(void); 35 36#define HAS_TIMER_SPKR 1 37int timer_spkr_acquire(void); 38int timer_spkr_release(void); 39void timer_spkr_setfreq(int freq); 40 41#endif /* _KERNEL */ 42 43#endif /* !_MACHINE_CLOCK_H_ */ 44