1f8381cbaSThomas Gleixner /* 2f8381cbaSThomas Gleixner * tick internal variable and functions used by low/high res code 3f8381cbaSThomas Gleixner */ 4e2830b5cSTorben Hohn #include <linux/hrtimer.h> 5e2830b5cSTorben Hohn #include <linux/tick.h> 66441402bSThomas Gleixner 77cf37e87SThomas Gleixner #ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD 86441402bSThomas Gleixner 96441402bSThomas Gleixner #define TICK_DO_TIMER_NONE -1 106441402bSThomas Gleixner #define TICK_DO_TIMER_BOOT -2 116441402bSThomas Gleixner 12f8381cbaSThomas Gleixner DECLARE_PER_CPU(struct tick_device, tick_cpu_device); 13f8381cbaSThomas Gleixner extern ktime_t tick_next_period; 14f8381cbaSThomas Gleixner extern ktime_t tick_period; 15d3ed7824SThomas Gleixner extern int tick_do_timer_cpu __read_mostly; 16f8381cbaSThomas Gleixner 17f8381cbaSThomas Gleixner extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); 18f8381cbaSThomas Gleixner extern void tick_handle_periodic(struct clock_event_device *dev); 19f8381cbaSThomas Gleixner 202344abbcSThomas Gleixner extern void clockevents_shutdown(struct clock_event_device *dev); 212344abbcSThomas Gleixner 22f8381cbaSThomas Gleixner /* 2379bf2bb3SThomas Gleixner * NO_HZ / high resolution timer shared code 2479bf2bb3SThomas Gleixner */ 2579bf2bb3SThomas Gleixner #ifdef CONFIG_TICK_ONESHOT 2679bf2bb3SThomas Gleixner extern void tick_setup_oneshot(struct clock_event_device *newdev, 2779bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 2879bf2bb3SThomas Gleixner ktime_t nextevt); 2979bf2bb3SThomas Gleixner extern int tick_program_event(ktime_t expires, int force); 3079bf2bb3SThomas Gleixner extern void tick_oneshot_notify(void); 3179bf2bb3SThomas Gleixner extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); 32cd05a1f8SThomas Gleixner extern void tick_resume_oneshot(void); 3379bf2bb3SThomas Gleixner # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 3479bf2bb3SThomas Gleixner extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); 3579bf2bb3SThomas Gleixner extern void tick_broadcast_oneshot_control(unsigned long reason); 3679bf2bb3SThomas Gleixner extern void tick_broadcast_switch_to_oneshot(void); 3779bf2bb3SThomas Gleixner extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); 38cd05a1f8SThomas Gleixner extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); 3927ce4cb4SThomas Gleixner extern int tick_broadcast_oneshot_active(void); 40fb02fbc1SThomas Gleixner extern void tick_check_oneshot_broadcast(int cpu); 413a142a06SThomas Gleixner bool tick_broadcast_oneshot_available(void); 4279bf2bb3SThomas Gleixner # else /* BROADCAST */ 4379bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 4479bf2bb3SThomas Gleixner { 4579bf2bb3SThomas Gleixner BUG(); 4679bf2bb3SThomas Gleixner } 4779bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 4879bf2bb3SThomas Gleixner static inline void tick_broadcast_switch_to_oneshot(void) { } 4979bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 5027ce4cb4SThomas Gleixner static inline int tick_broadcast_oneshot_active(void) { return 0; } 51fb02fbc1SThomas Gleixner static inline void tick_check_oneshot_broadcast(int cpu) { } 523a142a06SThomas Gleixner static inline bool tick_broadcast_oneshot_available(void) { return true; } 5379bf2bb3SThomas Gleixner # endif /* !BROADCAST */ 5479bf2bb3SThomas Gleixner 5579bf2bb3SThomas Gleixner #else /* !ONESHOT */ 5679bf2bb3SThomas Gleixner static inline 5779bf2bb3SThomas Gleixner void tick_setup_oneshot(struct clock_event_device *newdev, 5879bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 5979bf2bb3SThomas Gleixner ktime_t nextevt) 6079bf2bb3SThomas Gleixner { 6179bf2bb3SThomas Gleixner BUG(); 6279bf2bb3SThomas Gleixner } 63cd05a1f8SThomas Gleixner static inline void tick_resume_oneshot(void) 64cd05a1f8SThomas Gleixner { 65cd05a1f8SThomas Gleixner BUG(); 66cd05a1f8SThomas Gleixner } 6779bf2bb3SThomas Gleixner static inline int tick_program_event(ktime_t expires, int force) 6879bf2bb3SThomas Gleixner { 6979bf2bb3SThomas Gleixner return 0; 7079bf2bb3SThomas Gleixner } 7179bf2bb3SThomas Gleixner static inline void tick_oneshot_notify(void) { } 7279bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 7379bf2bb3SThomas Gleixner { 7479bf2bb3SThomas Gleixner BUG(); 7579bf2bb3SThomas Gleixner } 7679bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 7779bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 78cd05a1f8SThomas Gleixner static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) 79cd05a1f8SThomas Gleixner { 80cd05a1f8SThomas Gleixner return 0; 81cd05a1f8SThomas Gleixner } 82f8e256c6SIngo Molnar static inline int tick_broadcast_oneshot_active(void) { return 0; } 833a142a06SThomas Gleixner static inline bool tick_broadcast_oneshot_available(void) { return false; } 8479bf2bb3SThomas Gleixner #endif /* !TICK_ONESHOT */ 8579bf2bb3SThomas Gleixner 8679bf2bb3SThomas Gleixner /* 87f8381cbaSThomas Gleixner * Broadcasting support 88f8381cbaSThomas Gleixner */ 89f8381cbaSThomas Gleixner #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 90f8381cbaSThomas Gleixner extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); 91f8381cbaSThomas Gleixner extern int tick_check_broadcast_device(struct clock_event_device *dev); 92f8381cbaSThomas Gleixner extern int tick_is_broadcast_device(struct clock_event_device *dev); 93f8381cbaSThomas Gleixner extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); 94f8381cbaSThomas Gleixner extern void tick_shutdown_broadcast(unsigned int *cpup); 956321dd60SThomas Gleixner extern void tick_suspend_broadcast(void); 966321dd60SThomas Gleixner extern int tick_resume_broadcast(void); 97b352bc1cSThomas Gleixner extern void tick_broadcast_init(void); 98f8381cbaSThomas Gleixner extern void 99f8381cbaSThomas Gleixner tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); 100f8381cbaSThomas Gleixner 101f8381cbaSThomas Gleixner #else /* !BROADCAST */ 102f8381cbaSThomas Gleixner 103f8381cbaSThomas Gleixner static inline int tick_check_broadcast_device(struct clock_event_device *dev) 104f8381cbaSThomas Gleixner { 105f8381cbaSThomas Gleixner return 0; 106f8381cbaSThomas Gleixner } 107f8381cbaSThomas Gleixner 108f8381cbaSThomas Gleixner static inline int tick_is_broadcast_device(struct clock_event_device *dev) 109f8381cbaSThomas Gleixner { 110f8381cbaSThomas Gleixner return 0; 111f8381cbaSThomas Gleixner } 112f8381cbaSThomas Gleixner static inline int tick_device_uses_broadcast(struct clock_event_device *dev, 113f8381cbaSThomas Gleixner int cpu) 114f8381cbaSThomas Gleixner { 115f8381cbaSThomas Gleixner return 0; 116f8381cbaSThomas Gleixner } 117f8381cbaSThomas Gleixner static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } 118f8381cbaSThomas Gleixner static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } 119f8381cbaSThomas Gleixner static inline void tick_shutdown_broadcast(unsigned int *cpup) { } 1206321dd60SThomas Gleixner static inline void tick_suspend_broadcast(void) { } 1216321dd60SThomas Gleixner static inline int tick_resume_broadcast(void) { return 0; } 122b352bc1cSThomas Gleixner static inline void tick_broadcast_init(void) { } 123f8381cbaSThomas Gleixner 124f8381cbaSThomas Gleixner /* 125f8381cbaSThomas Gleixner * Set the periodic handler in non broadcast mode 126f8381cbaSThomas Gleixner */ 127f8381cbaSThomas Gleixner static inline void tick_set_periodic_handler(struct clock_event_device *dev, 128f8381cbaSThomas Gleixner int broadcast) 129f8381cbaSThomas Gleixner { 130f8381cbaSThomas Gleixner dev->event_handler = tick_handle_periodic; 131f8381cbaSThomas Gleixner } 132f8381cbaSThomas Gleixner #endif /* !BROADCAST */ 133f8381cbaSThomas Gleixner 134f8381cbaSThomas Gleixner /* 135f8381cbaSThomas Gleixner * Check, if the device is functional or a dummy for broadcast 136f8381cbaSThomas Gleixner */ 137f8381cbaSThomas Gleixner static inline int tick_device_is_functional(struct clock_event_device *dev) 138f8381cbaSThomas Gleixner { 139f8381cbaSThomas Gleixner return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 140f8381cbaSThomas Gleixner } 141e2830b5cSTorben Hohn 1427cf37e87SThomas Gleixner #endif 1437cf37e87SThomas Gleixner 144e2830b5cSTorben Hohn extern void do_timer(unsigned long ticks); 145