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 */ 17 extern int clkintr_pending; 18 extern int pscnt; 19 extern int psdiv; 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 26 void i8254_init(void); 27 28 /* 29 * Driver to clock driver interface. 30 */ 31 32 int acquire_timer2(int mode); 33 int release_timer2(void); 34 int rtcin(int reg); 35 void writertc(int reg, unsigned char val); 36 int sysbeep(int pitch, int period); 37 void init_TSC(void); 38 void init_TSC_tc(void); 39 40 #endif /* _KERNEL */ 41 42 #endif /* !_MACHINE_CLOCK_H_ */ 43