c5d28fb297
Some cpufreq drivers (at that time, only powernow-k7) need to recalibrate the cpu_khz at runtime. Signed-off-by: Bruno Ducrot <ducrot@poupinou.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Dave Jones <davej@redhat.com>
66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
#ifndef _ASMi386_TIMER_H
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#define _ASMi386_TIMER_H
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#include <linux/init.h>
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/**
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* struct timer_ops - used to define a timer source
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*
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* @name: name of the timer.
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* @init: Probes and initializes the timer. Takes clock= override
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* string as an argument. Returns 0 on success, anything else
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* on failure.
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* @mark_offset: called by the timer interrupt.
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* @get_offset: called by gettimeofday(). Returns the number of microseconds
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* since the last timer interupt.
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* @monotonic_clock: returns the number of nanoseconds since the init of the
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* timer.
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* @delay: delays this many clock cycles.
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*/
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struct timer_opts {
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char* name;
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void (*mark_offset)(void);
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unsigned long (*get_offset)(void);
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unsigned long long (*monotonic_clock)(void);
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void (*delay)(unsigned long);
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};
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struct init_timer_opts {
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int (*init)(char *override);
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struct timer_opts *opts;
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};
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#define TICK_SIZE (tick_nsec / 1000)
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extern struct timer_opts* __init select_timer(void);
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extern void clock_fallback(void);
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void setup_pit_timer(void);
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/* Modifiers for buggy PIT handling */
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extern int pit_latch_buggy;
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extern struct timer_opts *cur_timer;
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extern int timer_ack;
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/* list of externed timers */
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extern struct timer_opts timer_none;
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extern struct timer_opts timer_pit;
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extern struct init_timer_opts timer_pit_init;
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extern struct init_timer_opts timer_tsc_init;
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#ifdef CONFIG_X86_CYCLONE_TIMER
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extern struct init_timer_opts timer_cyclone_init;
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#endif
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extern unsigned long calibrate_tsc(void);
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extern void init_cpu_khz(void);
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extern int recalibrate_cpu_khz(void);
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#ifdef CONFIG_HPET_TIMER
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extern struct init_timer_opts timer_hpet_init;
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extern unsigned long calibrate_tsc_hpet(unsigned long *tsc_hpet_quotient_ptr);
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#endif
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#ifdef CONFIG_X86_PM_TIMER
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extern struct init_timer_opts timer_pmtmr_init;
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#endif
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#endif
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