| 1 | #ifndef _ASMi386_TIMER_H |
|---|
| 2 | #define _ASMi386_TIMER_H |
|---|
| 3 | #include <linux/init.h> |
|---|
| 4 | |
|---|
| 5 | /** |
|---|
| 6 | * struct timer_ops - used to define a timer source |
|---|
| 7 | * |
|---|
| 8 | * @name: name of the timer. |
|---|
| 9 | * @init: Probes and initializes the timer. Takes clock= override |
|---|
| 10 | * string as an argument. Returns 0 on success, anything else |
|---|
| 11 | * on failure. |
|---|
| 12 | * @mark_offset: called by the timer interrupt. |
|---|
| 13 | * @get_offset: called by gettimeofday(). Returns the number of microseconds |
|---|
| 14 | * since the last timer interupt. |
|---|
| 15 | * @monotonic_clock: returns the number of nanoseconds since the init of the |
|---|
| 16 | * timer. |
|---|
| 17 | * @delay: delays this many clock cycles. |
|---|
| 18 | */ |
|---|
| 19 | struct timer_opts { |
|---|
| 20 | char* name; |
|---|
| 21 | void (*mark_offset)(void); |
|---|
| 22 | unsigned long (*get_offset)(void); |
|---|
| 23 | unsigned long long (*monotonic_clock)(void); |
|---|
| 24 | void (*delay)(unsigned long); |
|---|
| 25 | unsigned long (*read_timer)(void); |
|---|
| 26 | int (*suspend)(pm_message_t state); |
|---|
| 27 | int (*resume)(void); |
|---|
| 28 | }; |
|---|
| 29 | |
|---|
| 30 | struct init_timer_opts { |
|---|
| 31 | int (*init)(char *override); |
|---|
| 32 | struct timer_opts *opts; |
|---|
| 33 | }; |
|---|
| 34 | |
|---|
| 35 | #define TICK_SIZE (tick_nsec / 1000) |
|---|
| 36 | |
|---|
| 37 | extern struct timer_opts* __init select_timer(void); |
|---|
| 38 | extern void clock_fallback(void); |
|---|
| 39 | void setup_pit_timer(void); |
|---|
| 40 | |
|---|
| 41 | /* Modifiers for buggy PIT handling */ |
|---|
| 42 | |
|---|
| 43 | extern int pit_latch_buggy; |
|---|
| 44 | |
|---|
| 45 | extern struct timer_opts *cur_timer; |
|---|
| 46 | extern int timer_ack; |
|---|
| 47 | |
|---|
| 48 | /* list of externed timers */ |
|---|
| 49 | extern struct timer_opts timer_none; |
|---|
| 50 | extern struct timer_opts timer_pit; |
|---|
| 51 | extern struct init_timer_opts timer_pit_init; |
|---|
| 52 | extern struct init_timer_opts timer_tsc_init; |
|---|
| 53 | #ifdef CONFIG_X86_CYCLONE_TIMER |
|---|
| 54 | extern struct init_timer_opts timer_cyclone_init; |
|---|
| 55 | #endif |
|---|
| 56 | |
|---|
| 57 | extern unsigned long calibrate_tsc(void); |
|---|
| 58 | extern void init_cpu_khz(void); |
|---|
| 59 | #ifdef CONFIG_HPET_TIMER |
|---|
| 60 | extern struct init_timer_opts timer_hpet_init; |
|---|
| 61 | extern unsigned long calibrate_tsc_hpet(unsigned long *tsc_hpet_quotient_ptr); |
|---|
| 62 | #endif |
|---|
| 63 | |
|---|
| 64 | #ifdef CONFIG_X86_PM_TIMER |
|---|
| 65 | extern struct init_timer_opts timer_pmtmr_init; |
|---|
| 66 | #endif |
|---|
| 67 | #endif |
|---|
