1f8381cbaSThomas Gleixner /* 2f8381cbaSThomas Gleixner * tick internal variable and functions used by low/high res code 3f8381cbaSThomas Gleixner */ 4f8381cbaSThomas Gleixner DECLARE_PER_CPU(struct tick_device, tick_cpu_device); 5f8381cbaSThomas Gleixner extern spinlock_t tick_device_lock; 6f8381cbaSThomas Gleixner extern ktime_t tick_next_period; 7f8381cbaSThomas Gleixner extern ktime_t tick_period; 8d3ed7824SThomas Gleixner extern int tick_do_timer_cpu __read_mostly; 9f8381cbaSThomas Gleixner 10f8381cbaSThomas Gleixner extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); 11f8381cbaSThomas Gleixner extern void tick_handle_periodic(struct clock_event_device *dev); 12f8381cbaSThomas Gleixner 132344abbcSThomas Gleixner extern void clockevents_shutdown(struct clock_event_device *dev); 142344abbcSThomas Gleixner 15f8381cbaSThomas Gleixner /* 1679bf2bb3SThomas Gleixner * NO_HZ / high resolution timer shared code 1779bf2bb3SThomas Gleixner */ 1879bf2bb3SThomas Gleixner #ifdef CONFIG_TICK_ONESHOT 1979bf2bb3SThomas Gleixner extern void tick_setup_oneshot(struct clock_event_device *newdev, 2079bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 2179bf2bb3SThomas Gleixner ktime_t nextevt); 221fb9b7d2SThomas Gleixner extern int tick_dev_program_event(struct clock_event_device *dev, 231fb9b7d2SThomas Gleixner ktime_t expires, int force); 2479bf2bb3SThomas Gleixner extern int tick_program_event(ktime_t expires, int force); 2579bf2bb3SThomas Gleixner extern void tick_oneshot_notify(void); 2679bf2bb3SThomas Gleixner extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); 27cd05a1f8SThomas Gleixner extern void tick_resume_oneshot(void); 2879bf2bb3SThomas Gleixner # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 2979bf2bb3SThomas Gleixner extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); 3079bf2bb3SThomas Gleixner extern void tick_broadcast_oneshot_control(unsigned long reason); 3179bf2bb3SThomas Gleixner extern void tick_broadcast_switch_to_oneshot(void); 3279bf2bb3SThomas Gleixner extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); 33cd05a1f8SThomas Gleixner extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); 3479bf2bb3SThomas Gleixner # else /* BROADCAST */ 3579bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 3679bf2bb3SThomas Gleixner { 3779bf2bb3SThomas Gleixner BUG(); 3879bf2bb3SThomas Gleixner } 3979bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 4079bf2bb3SThomas Gleixner static inline void tick_broadcast_switch_to_oneshot(void) { } 4179bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 4279bf2bb3SThomas Gleixner # endif /* !BROADCAST */ 4379bf2bb3SThomas Gleixner 4479bf2bb3SThomas Gleixner #else /* !ONESHOT */ 4579bf2bb3SThomas Gleixner static inline 4679bf2bb3SThomas Gleixner void tick_setup_oneshot(struct clock_event_device *newdev, 4779bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 4879bf2bb3SThomas Gleixner ktime_t nextevt) 4979bf2bb3SThomas Gleixner { 5079bf2bb3SThomas Gleixner BUG(); 5179bf2bb3SThomas Gleixner } 52cd05a1f8SThomas Gleixner static inline void tick_resume_oneshot(void) 53cd05a1f8SThomas Gleixner { 54cd05a1f8SThomas Gleixner BUG(); 55cd05a1f8SThomas Gleixner } 5679bf2bb3SThomas Gleixner static inline int tick_program_event(ktime_t expires, int force) 5779bf2bb3SThomas Gleixner { 5879bf2bb3SThomas Gleixner return 0; 5979bf2bb3SThomas Gleixner } 6079bf2bb3SThomas Gleixner static inline void tick_oneshot_notify(void) { } 6179bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 6279bf2bb3SThomas Gleixner { 6379bf2bb3SThomas Gleixner BUG(); 6479bf2bb3SThomas Gleixner } 6579bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 6679bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 67cd05a1f8SThomas Gleixner static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) 68cd05a1f8SThomas Gleixner { 69cd05a1f8SThomas Gleixner return 0; 70cd05a1f8SThomas Gleixner } 7179bf2bb3SThomas Gleixner #endif /* !TICK_ONESHOT */ 7279bf2bb3SThomas Gleixner 7379bf2bb3SThomas Gleixner /* 74f8381cbaSThomas Gleixner * Broadcasting support 75f8381cbaSThomas Gleixner */ 76f8381cbaSThomas Gleixner #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 77f8381cbaSThomas Gleixner extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); 78f8381cbaSThomas Gleixner extern int tick_check_broadcast_device(struct clock_event_device *dev); 79f8381cbaSThomas Gleixner extern int tick_is_broadcast_device(struct clock_event_device *dev); 80f8381cbaSThomas Gleixner extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); 81f8381cbaSThomas Gleixner extern void tick_shutdown_broadcast(unsigned int *cpup); 826321dd60SThomas Gleixner extern void tick_suspend_broadcast(void); 836321dd60SThomas Gleixner extern int tick_resume_broadcast(void); 84f8381cbaSThomas Gleixner 85f8381cbaSThomas Gleixner extern void 86f8381cbaSThomas Gleixner tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); 87f8381cbaSThomas Gleixner 88f8381cbaSThomas Gleixner #else /* !BROADCAST */ 89f8381cbaSThomas Gleixner 90f8381cbaSThomas Gleixner static inline int tick_check_broadcast_device(struct clock_event_device *dev) 91f8381cbaSThomas Gleixner { 92f8381cbaSThomas Gleixner return 0; 93f8381cbaSThomas Gleixner } 94f8381cbaSThomas Gleixner 95f8381cbaSThomas Gleixner static inline int tick_is_broadcast_device(struct clock_event_device *dev) 96f8381cbaSThomas Gleixner { 97f8381cbaSThomas Gleixner return 0; 98f8381cbaSThomas Gleixner } 99f8381cbaSThomas Gleixner static inline int tick_device_uses_broadcast(struct clock_event_device *dev, 100f8381cbaSThomas Gleixner int cpu) 101f8381cbaSThomas Gleixner { 102f8381cbaSThomas Gleixner return 0; 103f8381cbaSThomas Gleixner } 104f8381cbaSThomas Gleixner static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } 105f8381cbaSThomas Gleixner static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } 106f8381cbaSThomas Gleixner static inline void tick_shutdown_broadcast(unsigned int *cpup) { } 1076321dd60SThomas Gleixner static inline void tick_suspend_broadcast(void) { } 1086321dd60SThomas Gleixner static inline int tick_resume_broadcast(void) { return 0; } 109f8381cbaSThomas Gleixner 110f8381cbaSThomas Gleixner /* 111f8381cbaSThomas Gleixner * Set the periodic handler in non broadcast mode 112f8381cbaSThomas Gleixner */ 113f8381cbaSThomas Gleixner static inline void tick_set_periodic_handler(struct clock_event_device *dev, 114f8381cbaSThomas Gleixner int broadcast) 115f8381cbaSThomas Gleixner { 116f8381cbaSThomas Gleixner dev->event_handler = tick_handle_periodic; 117f8381cbaSThomas Gleixner } 118f8381cbaSThomas Gleixner #endif /* !BROADCAST */ 119f8381cbaSThomas Gleixner 120f8381cbaSThomas Gleixner /* 121f8381cbaSThomas Gleixner * Check, if the device is functional or a dummy for broadcast 122f8381cbaSThomas Gleixner */ 123f8381cbaSThomas Gleixner static inline int tick_device_is_functional(struct clock_event_device *dev) 124f8381cbaSThomas Gleixner { 125f8381cbaSThomas Gleixner return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 126f8381cbaSThomas Gleixner } 127