1c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifndef _LINUX_TIMER_H 2c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define _LINUX_TIMER_H 3c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 4c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/list.h> 5c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/spinlock.h> 6c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#include <linux/stddef.h> 7c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 8c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct tvec_t_base_s; 9c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 10c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct timer_list { 11c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct list_head entry; 12c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long expires; 13c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 14c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru void (*function)(unsigned long); 15c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long data; 16c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 17c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct tvec_t_base_s *base; 18c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru}; 19c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 20c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern struct tvec_t_base_s boot_tvec_bases; 21c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 22c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define TIMER_INITIALIZER(_function, _expires, _data) { \ 23c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru .function = (_function), \ 24c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru .expires = (_expires), \ 25c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru .data = (_data), \ 26c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru .base = &boot_tvec_bases, \ 27c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru } 28c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 29c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define DEFINE_TIMER(_name, _function, _expires, _data) \ 30c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru struct timer_list _name = \ 31c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru TIMER_INITIALIZER(_function, _expires, _data) 32c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 33c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruvoid fastcall init_timer(struct timer_list * timer); 34c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 35c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void setup_timer(struct timer_list * timer, 36c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru void (*function)(unsigned long), 37c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru unsigned long data) 38c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 39c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru timer->function = function; 40c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru timer->data = data; 41c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru init_timer(timer); 42c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 43c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 44c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/*** 45c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * timer_pending - is a timer pending? 46c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * @timer: the timer in question 47c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 48c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * timer_pending will tell whether a given timer is currently pending, 49c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * or not. Callers must ensure serialization wrt. other operations done 50c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * to this timer, eg. interrupt contexts, or other CPUs on SMP. 51c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 52c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * return value: 1 if the timer is pending, 0 if not. 53c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 54c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline int timer_pending(const struct timer_list * timer) 55c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 56c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru return timer->entry.next != NULL; 57c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 58c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 59c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void add_timer_on(struct timer_list *timer, int cpu); 60c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int del_timer(struct timer_list * timer); 61c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int __mod_timer(struct timer_list *timer, unsigned long expires); 62c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int mod_timer(struct timer_list *timer, unsigned long expires); 63c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 64c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern unsigned long next_timer_interrupt(void); 65c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 66c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru/*** 67c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * add_timer - start a timer 68c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * @timer: the timer to be added 69c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 70c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The kernel will do a ->function(->data) callback from the 71c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * timer interrupt at the ->expires point in the future. The 72c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * current time is 'jiffies'. 73c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 74c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * The timer's ->expires, ->function (and if the handler uses it, ->data) 75c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * fields must be set prior calling this function. 76c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * 77c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * Timers with an ->expires field in the past will be executed in the next 78c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru * timer tick. 79c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru */ 80c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustatic inline void add_timer(struct timer_list *timer) 81c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru{ 82c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru BUG_ON(timer_pending(timer)); 83c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru __mod_timer(timer, timer->expires); 84c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru} 85c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 86c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#ifdef CONFIG_SMP 87c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru extern int try_to_del_timer_sync(struct timer_list *timer); 88c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru extern int del_timer_sync(struct timer_list *timer); 89c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#else 90c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define try_to_del_timer_sync(t) del_timer(t) 91c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru# define del_timer_sync(t) del_timer(t) 92c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 93c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 94c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#define del_singleshot_timer_sync(t) del_timer_sync(t) 95c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 96c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void init_timers(void); 97c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern void run_local_timers(void); 98c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Querustruct hrtimer; 99c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queruextern int it_real_fn(struct hrtimer *); 100c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru 101c559cd81139f97cecad1ad91a0b2e25a5936d53Jean-Baptiste Queru#endif 102