1f8381cbaSThomas Gleixner /* 2f8381cbaSThomas Gleixner * tick internal variable and functions used by low/high res code 3f8381cbaSThomas Gleixner */ 46441402bSThomas Gleixner 56441402bSThomas Gleixner #define TICK_DO_TIMER_NONE -1 66441402bSThomas Gleixner #define TICK_DO_TIMER_BOOT -2 76441402bSThomas Gleixner 8f8381cbaSThomas Gleixner DECLARE_PER_CPU(struct tick_device, tick_cpu_device); 9f8381cbaSThomas Gleixner extern spinlock_t tick_device_lock; 10f8381cbaSThomas Gleixner extern ktime_t tick_next_period; 11f8381cbaSThomas Gleixner extern ktime_t tick_period; 12d3ed7824SThomas Gleixner extern int tick_do_timer_cpu __read_mostly; 13f8381cbaSThomas Gleixner 14f8381cbaSThomas Gleixner extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); 15f8381cbaSThomas Gleixner extern void tick_handle_periodic(struct clock_event_device *dev); 16f8381cbaSThomas Gleixner 172344abbcSThomas Gleixner extern void clockevents_shutdown(struct clock_event_device *dev); 182344abbcSThomas Gleixner 19f8381cbaSThomas Gleixner /* 2079bf2bb3SThomas Gleixner * NO_HZ / high resolution timer shared code 2179bf2bb3SThomas Gleixner */ 2279bf2bb3SThomas Gleixner #ifdef CONFIG_TICK_ONESHOT 2379bf2bb3SThomas Gleixner extern void tick_setup_oneshot(struct clock_event_device *newdev, 2479bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 2579bf2bb3SThomas Gleixner ktime_t nextevt); 261fb9b7d2SThomas Gleixner extern int tick_dev_program_event(struct clock_event_device *dev, 271fb9b7d2SThomas Gleixner ktime_t expires, int force); 2879bf2bb3SThomas Gleixner extern int tick_program_event(ktime_t expires, int force); 2979bf2bb3SThomas Gleixner extern void tick_oneshot_notify(void); 3079bf2bb3SThomas Gleixner extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); 31cd05a1f8SThomas Gleixner extern void tick_resume_oneshot(void); 3279bf2bb3SThomas Gleixner # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 3379bf2bb3SThomas Gleixner extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); 3479bf2bb3SThomas Gleixner extern void tick_broadcast_oneshot_control(unsigned long reason); 3579bf2bb3SThomas Gleixner extern void tick_broadcast_switch_to_oneshot(void); 3679bf2bb3SThomas Gleixner extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); 37cd05a1f8SThomas Gleixner extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); 3879bf2bb3SThomas Gleixner # else /* BROADCAST */ 3979bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 4079bf2bb3SThomas Gleixner { 4179bf2bb3SThomas Gleixner BUG(); 4279bf2bb3SThomas Gleixner } 4379bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 4479bf2bb3SThomas Gleixner static inline void tick_broadcast_switch_to_oneshot(void) { } 4579bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 4679bf2bb3SThomas Gleixner # endif /* !BROADCAST */ 4779bf2bb3SThomas Gleixner 4879bf2bb3SThomas Gleixner #else /* !ONESHOT */ 4979bf2bb3SThomas Gleixner static inline 5079bf2bb3SThomas Gleixner void tick_setup_oneshot(struct clock_event_device *newdev, 5179bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 5279bf2bb3SThomas Gleixner ktime_t nextevt) 5379bf2bb3SThomas Gleixner { 5479bf2bb3SThomas Gleixner BUG(); 5579bf2bb3SThomas Gleixner } 56cd05a1f8SThomas Gleixner static inline void tick_resume_oneshot(void) 57cd05a1f8SThomas Gleixner { 58cd05a1f8SThomas Gleixner BUG(); 59cd05a1f8SThomas Gleixner } 6079bf2bb3SThomas Gleixner static inline int tick_program_event(ktime_t expires, int force) 6179bf2bb3SThomas Gleixner { 6279bf2bb3SThomas Gleixner return 0; 6379bf2bb3SThomas Gleixner } 6479bf2bb3SThomas Gleixner static inline void tick_oneshot_notify(void) { } 6579bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 6679bf2bb3SThomas Gleixner { 6779bf2bb3SThomas Gleixner BUG(); 6879bf2bb3SThomas Gleixner } 6979bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 7079bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 71cd05a1f8SThomas Gleixner static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) 72cd05a1f8SThomas Gleixner { 73cd05a1f8SThomas Gleixner return 0; 74cd05a1f8SThomas Gleixner } 7579bf2bb3SThomas Gleixner #endif /* !TICK_ONESHOT */ 7679bf2bb3SThomas Gleixner 7779bf2bb3SThomas Gleixner /* 78f8381cbaSThomas Gleixner * Broadcasting support 79f8381cbaSThomas Gleixner */ 80f8381cbaSThomas Gleixner #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 81f8381cbaSThomas Gleixner extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); 82f8381cbaSThomas Gleixner extern int tick_check_broadcast_device(struct clock_event_device *dev); 83f8381cbaSThomas Gleixner extern int tick_is_broadcast_device(struct clock_event_device *dev); 84f8381cbaSThomas Gleixner extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); 85f8381cbaSThomas Gleixner extern void tick_shutdown_broadcast(unsigned int *cpup); 866321dd60SThomas Gleixner extern void tick_suspend_broadcast(void); 876321dd60SThomas Gleixner extern int tick_resume_broadcast(void); 88f8381cbaSThomas Gleixner 89f8381cbaSThomas Gleixner extern void 90f8381cbaSThomas Gleixner tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); 91f8381cbaSThomas Gleixner 92f8381cbaSThomas Gleixner #else /* !BROADCAST */ 93f8381cbaSThomas Gleixner 94f8381cbaSThomas Gleixner static inline int tick_check_broadcast_device(struct clock_event_device *dev) 95f8381cbaSThomas Gleixner { 96f8381cbaSThomas Gleixner return 0; 97f8381cbaSThomas Gleixner } 98f8381cbaSThomas Gleixner 99f8381cbaSThomas Gleixner static inline int tick_is_broadcast_device(struct clock_event_device *dev) 100f8381cbaSThomas Gleixner { 101f8381cbaSThomas Gleixner return 0; 102f8381cbaSThomas Gleixner } 103f8381cbaSThomas Gleixner static inline int tick_device_uses_broadcast(struct clock_event_device *dev, 104f8381cbaSThomas Gleixner int cpu) 105f8381cbaSThomas Gleixner { 106f8381cbaSThomas Gleixner return 0; 107f8381cbaSThomas Gleixner } 108f8381cbaSThomas Gleixner static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } 109f8381cbaSThomas Gleixner static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } 110f8381cbaSThomas Gleixner static inline void tick_shutdown_broadcast(unsigned int *cpup) { } 1116321dd60SThomas Gleixner static inline void tick_suspend_broadcast(void) { } 1126321dd60SThomas Gleixner static inline int tick_resume_broadcast(void) { return 0; } 113f8381cbaSThomas Gleixner 114f8381cbaSThomas Gleixner /* 115f8381cbaSThomas Gleixner * Set the periodic handler in non broadcast mode 116f8381cbaSThomas Gleixner */ 117f8381cbaSThomas Gleixner static inline void tick_set_periodic_handler(struct clock_event_device *dev, 118f8381cbaSThomas Gleixner int broadcast) 119f8381cbaSThomas Gleixner { 120f8381cbaSThomas Gleixner dev->event_handler = tick_handle_periodic; 121f8381cbaSThomas Gleixner } 122f8381cbaSThomas Gleixner #endif /* !BROADCAST */ 123f8381cbaSThomas Gleixner 124f8381cbaSThomas Gleixner /* 125f8381cbaSThomas Gleixner * Check, if the device is functional or a dummy for broadcast 126f8381cbaSThomas Gleixner */ 127f8381cbaSThomas Gleixner static inline int tick_device_is_functional(struct clock_event_device *dev) 128f8381cbaSThomas Gleixner { 129f8381cbaSThomas Gleixner return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 130f8381cbaSThomas Gleixner } 131