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#ifndef _ASMi386_TIMER_H
#define _ASMi386_TIMER_H
#include <linux/init.h>
/**
* struct timer_ops - used to define a timer source
*
* @name: name of the timer.
* @init: Probes and initializes the timer. Takes clock= override
* string as an argument. Returns 0 on success, anything else
* on failure.
* @mark_offset: called by the timer interrupt.
* @get_offset: called by gettimeofday(). Returns the number of microseconds
* since the last timer interupt.
* @monotonic_clock: returns the number of nanoseconds since the init of the
* timer.
* @delay: delays this many clock cycles.
*/
struct timer_opts {
char* name;
void (*mark_offset)(void);
unsigned long (*get_offset)(void);
unsigned long long (*monotonic_clock)(void);
void (*delay)(unsigned long);
unsigned long (*read_timer)(void);
};
struct init_timer_opts {
int (*init)(char *override);
struct timer_opts *opts;
};
#define TICK_SIZE (tick_nsec / 1000)
extern struct timer_opts* __init select_timer(void);
extern void clock_fallback(void);
void setup_pit_timer(void);
/* Modifiers for buggy PIT handling */
extern int pit_latch_buggy;
extern struct timer_opts *cur_timer;
extern int timer_ack;
/* list of externed timers */
extern struct timer_opts timer_none;
extern struct timer_opts timer_pit;
extern struct init_timer_opts timer_pit_init;
extern struct init_timer_opts timer_tsc_init;
#ifdef CONFIG_X86_CYCLONE_TIMER
extern struct init_timer_opts timer_cyclone_init;
#endif
extern unsigned long calibrate_tsc(void);
extern unsigned long read_timer_tsc(void);
extern void init_cpu_khz(void);
extern int recalibrate_cpu_khz(void);
#ifdef CONFIG_HPET_TIMER
extern struct init_timer_opts timer_hpet_init;
extern unsigned long calibrate_tsc_hpet(unsigned long *tsc_hpet_quotient_ptr);
#endif
#ifdef CONFIG_X86_PM_TIMER
extern struct init_timer_opts timer_pmtmr_init;
#endif
#endif
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