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: releng/8.3/sys/i386/include/clock.h 199583 2009-11-20 15:27:52Z jhb $
    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 u_int    i8254_freq;
   19 extern int      i8254_max_count;
   20 extern uint64_t tsc_freq;
   21 extern int      tsc_is_broken;
   22 extern int      tsc_is_invariant;
   23 
   24 void    i8254_init(void);
   25 
   26 struct trapframe;
   27  
   28 int     hardclockintr(struct trapframe *frame);
   29 int     statclockintr(struct trapframe *frame);
   30 int     profclockintr(struct trapframe *frame);
   31 
   32 /*
   33  * Driver to clock driver interface.
   34  */
   35 
   36 void    startrtclock(void);
   37 void    timer_restore(void);
   38 void    init_TSC(void);
   39 void    init_TSC_tc(void);
   40 
   41 #define HAS_TIMER_SPKR 1
   42 int     timer_spkr_acquire(void);
   43 int     timer_spkr_release(void);
   44 void    timer_spkr_setfreq(int freq);
   45 
   46 #endif /* _KERNEL */
   47 
   48 #endif /* !_MACHINE_CLOCK_H_ */

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