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: src/sys/i386/include/clock.h,v 1.38.2.1 2002/11/02 04:41:50 iwasaki Exp $ 7 */ 8 9 #ifndef _MACHINE_CLOCK_H_ 10 #define _MACHINE_CLOCK_H_ 11 12 #ifdef _KERNEL 13 14 #ifndef _SYS_TYPES_H_ 15 #include <sys/types.h> 16 #endif 17 18 /* 19 * i386 to clock driver interface. 20 * XXX large parts of the driver and its interface are misplaced. 21 */ 22 extern int adjkerntz; 23 extern int disable_rtc_set; 24 extern u_int timer_freq; 25 extern int timer0_max_count; 26 extern int tsc_present; 27 extern int tsc_invariant; 28 extern int tsc_mpsync; 29 extern int64_t tsc_frequency; 30 extern int tsc_is_broken; 31 extern int wall_cmos_clock; 32 extern int apic_8254_intr; 33 34 /* 35 * Driver to clock driver interface. 36 */ 37 38 int rtcin (int val); 39 int acquire_timer2 (int mode); 40 int release_timer2 (void); 41 int sysbeep (int pitch, int period); 42 void timer_restore (void); 43 44 #endif /* _KERNEL */ 45 46 #endif /* !_MACHINE_CLOCK_H_ */ 47