| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | }; |
| 26 | |
| 27 | struct init_timer_opts { |
| 28 | int (*init)(char *override); |
| 29 | struct timer_opts *opts; |
| 30 | }; |
| 31 | |
| 32 | #define TICK_SIZE (tick_nsec / 1000) |
| 33 | |
| 34 | extern struct timer_opts* __init select_timer(void); |
| 35 | extern void clock_fallback(void); |
| 36 | void setup_pit_timer(void); |
| 37 | |
| 38 | /* Modifiers for buggy PIT handling */ |
| 39 | |
| 40 | extern int pit_latch_buggy; |
| 41 | |
| 42 | extern struct timer_opts *cur_timer; |
| 43 | extern int timer_ack; |
| 44 | |
| 45 | /* list of externed timers */ |
| 46 | extern struct timer_opts timer_none; |
| 47 | extern struct timer_opts timer_pit; |
| 48 | extern struct init_timer_opts timer_pit_init; |
| 49 | extern struct init_timer_opts timer_tsc_init; |
| 50 | #ifdef CONFIG_X86_CYCLONE_TIMER |
| 51 | extern struct init_timer_opts timer_cyclone_init; |
| 52 | #endif |
| 53 | |
| 54 | extern unsigned long calibrate_tsc(void); |
| 55 | extern void init_cpu_khz(void); |
| 56 | #ifdef CONFIG_HPET_TIMER |
| 57 | extern struct init_timer_opts timer_hpet_init; |
| 58 | extern unsigned long calibrate_tsc_hpet(unsigned long *tsc_hpet_quotient_ptr); |
| 59 | #endif |
| 60 | |
| 61 | #ifdef CONFIG_X86_PM_TIMER |
| 62 | extern struct init_timer_opts timer_pmtmr_init; |
| 63 | #endif |
| 64 | #endif |