1 /* 2 * Kernel interface to machine-dependent clock driver. 3 * Garrett Wollman, September 1994. 4 * This file is in the public domain. 5 * 6 * $Id: clock.h,v 1.33 1998/02/25 02:20:30 bde Exp $ 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 adjkerntz; 18 extern int disable_rtc_set; 19 extern int statclock_disable; 20 extern u_int timer_freq; 21 extern int timer0_max_count; 22 extern u_int tsc_freq; 23 extern int wall_cmos_clock; 24 #ifdef APIC_IO 25 extern int apic_8254_intr; 26 #endif 27 28 /* 29 * Driver to clock driver interface. 30 */ 31 struct clockframe; 32 33 void DELAY __P((int usec)); 34 int acquire_timer0 __P((int rate, 35 void (*function)(struct clockframe *frame))); 36 int acquire_timer2 __P((int mode)); 37 int release_timer0 __P((void)); 38 int release_timer2 __P((void)); 39 #ifndef PC98 40 int rtcin __P((int val)); 41 #else 42 int acquire_timer1 __P((int mode)); 43 int release_timer1 __P((void)); 44 #endif 45 int sysbeep __P((int pitch, int period)); 46 47 #endif /* KERNEL */ 48 49 #endif /* !_MACHINE_CLOCK_H_ */ 50