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/*-
* Kernel interface to machine-dependent clock driver.
* Garrett Wollman, September 1994.
* This file is in the public domain.
*
* $FreeBSD$
*/
#ifndef _MACHINE_CLOCK_H_
#define _MACHINE_CLOCK_H_
#ifdef _KERNEL
/*
* i386 to clock driver interface.
* XXX large parts of the driver and its interface are misplaced.
*/
extern int clkintr_pending;
extern u_int i8254_freq;
extern int i8254_max_count;
extern uint64_t tsc_freq;
extern int tsc_is_invariant;
extern int tsc_perf_stat;
#ifdef SMP
extern int smp_tsc;
#endif
void i8254_init(void);
void i8254_delay(int);
void clock_init(void);
/*
* Driver to clock driver interface.
*/
void startrtclock(void);
void init_TSC(void);
void resume_TSC(void);
#define HAS_TIMER_SPKR 1
int timer_spkr_acquire(void);
int timer_spkr_release(void);
void timer_spkr_setfreq(int freq);
#endif /* _KERNEL */
#endif /* !_MACHINE_CLOCK_H_ */
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