| #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); |
| }; |
| |
| 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 void init_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 |