65e7d70b09
when the user has indicated that the system has synchronized TSCs or it has P-state invariant TSCs. For the former case, we may clear the tunable if it fails the test to prevent accidental foot-shooting. For the latter case, we may set it if it passes the test to notify the user that it may be usable.
42 lines
810 B
C
42 lines
810 B
C
/*-
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* Kernel interface to machine-dependent clock driver.
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* Garrett Wollman, September 1994.
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* This file is in the public domain.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_CLOCK_H_
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#define _MACHINE_CLOCK_H_
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#ifdef _KERNEL
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/*
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* i386 to clock driver interface.
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* XXX large parts of the driver and its interface are misplaced.
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*/
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extern int clkintr_pending;
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extern u_int i8254_freq;
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extern int i8254_max_count;
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extern uint64_t tsc_freq;
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extern int tsc_is_invariant;
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extern int tsc_perf_stat;
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void i8254_init(void);
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/*
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* Driver to clock driver interface.
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*/
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void startrtclock(void);
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void timer_restore(void);
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void init_TSC(void);
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#define HAS_TIMER_SPKR 1
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int timer_spkr_acquire(void);
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int timer_spkr_release(void);
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void timer_spkr_setfreq(int freq);
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#endif /* _KERNEL */
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#endif /* !_MACHINE_CLOCK_H_ */
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