The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/clock.h

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    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      adjkerntz;
   18 extern int      clkintr_pending;
   19 extern int      disable_rtc_set;
   20 extern int      pscnt;
   21 extern int      psdiv;
   22 extern int      statclock_disable;
   23 extern u_int    timer_freq;
   24 extern int      timer0_max_count;
   25 extern uint64_t tsc_freq;
   26 extern int      tsc_is_broken;
   27 extern int      wall_cmos_clock;
   28 
   29 /*
   30  * Driver to clock driver interface.
   31  */
   32 struct clockframe;
   33 
   34 int     acquire_timer2(int mode);
   35 int     release_timer2(void);
   36 int     rtcin(int reg);
   37 void    writertc(int reg, unsigned char val);
   38 int     sysbeep(int pitch, int period);
   39 void    timer_restore(void);
   40 void    init_TSC(void);
   41 void    init_TSC_tc(void);
   42 
   43 #endif /* _KERNEL */
   44 
   45 #endif /* !_MACHINE_CLOCK_H_ */

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