2 * Kernel interface to machine-dependent clock driver.
3 * Garrett Wollman, September 1994.
4 * This file is in the public domain.
9 #ifndef _MACHINE_CLOCK_H_
10 #define _MACHINE_CLOCK_H_
14 * i386 to clock driver interface.
15 * XXX large parts of the driver and its interface are misplaced.
17 extern int clkintr_pending;
20 extern int statclock_disable;
21 extern u_int timer_freq;
22 extern int timer0_max_count;
23 extern uint64_t tsc_freq;
24 extern int tsc_is_broken;
25 extern int tsc_is_invariant;
27 void i8254_init(void);
30 * Driver to clock driver interface.
33 int acquire_timer2(int mode);
34 int release_timer2(void);
36 void writertc(int reg, unsigned char val);
37 int sysbeep(int pitch, int period);
38 void timer_restore(void);
40 void init_TSC_tc(void);
44 #endif /* !_MACHINE_CLOCK_H_ */