diff options
Diffstat (limited to 'include/timer.h')
| -rw-r--r-- | include/timer.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/include/timer.h b/include/timer.h index 8770a95..1796508 100644 --- a/include/timer.h +++ b/include/timer.h @@ -24,6 +24,7 @@ struct timer { timer_func_t expiry; void * user_data; void * running; + uint64_t gen; }; extern void init_timer(struct timer *t, timer_func_t expiry, void *data); @@ -33,8 +34,20 @@ extern void init_timer(struct timer *t, timer_func_t expiry, void *data); * This doesn't synchronize so if the timer also reschedules itself there * is no telling which one "wins". The advantage is that this can be called * with any lock held or from the timer expiry itself. + * + * We support a magic expiry of TIMER_POLL which causes a given timer to + * be called whenever OPAL main polling loop is run, which is often during + * boot and occasionally while Linux is up. This can be used with both + * schedule_timer() and schedule_timer_at() + * + * This is useful for a number of interrupt driven drivers to have a way + * to crank their state machine at times when the interrupt isn't available + * such as during early boot. + * + * Note: For convenience, schedule_timer() returns the current TB value */ -extern void schedule_timer(struct timer *t, uint64_t how_long); +#define TIMER_POLL ((uint64_t)-1) +extern uint64_t schedule_timer(struct timer *t, uint64_t how_long); extern void schedule_timer_at(struct timer *t, uint64_t when); /* Synchronization point with the timer. If the callback has started before @@ -67,4 +80,7 @@ extern void cancel_timer_async(struct timer *t); /* Run the timers */ extern void check_timers(void); +/* Core init */ +void late_init_timers(void); + #endif /* __TIMER_H */ |