freebsd-skq/sys/amd64/include/clock.h
Alexander Motin dbd55f3ff0 - Implement MI helper functions, dividing one or two timer interrupts with
arbitrary frequencies into hardclock(), statclock() and profclock() calls.
Same code with minor variations duplicated several times over the tree for
different timer drivers and architectures.
- Switch all x86 archs to new functions, simplifying the code and removing
extra logic from timer drivers. Other archs are also welcome.
2010-05-24 11:40:49 +00:00

47 lines
916 B
C

/*-
* Kernel interface to machine-dependent clock driver.
* Garrett Wollman, September 1994.
* This file is in the public domain.
*
* $FreeBSD$
*/
#ifndef _MACHINE_CLOCK_H_
#define _MACHINE_CLOCK_H_
#ifdef _KERNEL
/*
* i386 to clock driver interface.
* XXX large parts of the driver and its interface are misplaced.
*/
extern int clkintr_pending;
extern u_int i8254_freq;
extern int i8254_max_count;
extern uint64_t tsc_freq;
extern int tsc_is_broken;
extern int tsc_is_invariant;
void i8254_init(void);
struct trapframe;
int hardclockintr(struct trapframe *frame);
int statclockintr(struct trapframe *frame);
/*
* Driver to clock driver interface.
*/
void startrtclock(void);
void init_TSC(void);
void init_TSC_tc(void);
#define HAS_TIMER_SPKR 1
int timer_spkr_acquire(void);
int timer_spkr_release(void);
void timer_spkr_setfreq(int freq);
#endif /* _KERNEL */
#endif /* !_MACHINE_CLOCK_H_ */