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 ktime_t tick_next_period; 10f8381cbaSThomas Gleixner extern ktime_t tick_period; 11d3ed7824SThomas Gleixner extern int tick_do_timer_cpu __read_mostly; 12f8381cbaSThomas Gleixner 13f8381cbaSThomas Gleixner extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); 14f8381cbaSThomas Gleixner extern void tick_handle_periodic(struct clock_event_device *dev); 15f8381cbaSThomas Gleixner 162344abbcSThomas Gleixner extern void clockevents_shutdown(struct clock_event_device *dev); 172344abbcSThomas Gleixner 18f8381cbaSThomas Gleixner /* 1979bf2bb3SThomas Gleixner * NO_HZ / high resolution timer shared code 2079bf2bb3SThomas Gleixner */ 2179bf2bb3SThomas Gleixner #ifdef CONFIG_TICK_ONESHOT 2279bf2bb3SThomas Gleixner extern void tick_setup_oneshot(struct clock_event_device *newdev, 2379bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 2479bf2bb3SThomas Gleixner ktime_t nextevt); 251fb9b7d2SThomas Gleixner extern int tick_dev_program_event(struct clock_event_device *dev, 261fb9b7d2SThomas Gleixner ktime_t expires, int force); 2779bf2bb3SThomas Gleixner extern int tick_program_event(ktime_t expires, int force); 2879bf2bb3SThomas Gleixner extern void tick_oneshot_notify(void); 2979bf2bb3SThomas Gleixner extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); 30cd05a1f8SThomas Gleixner extern void tick_resume_oneshot(void); 3179bf2bb3SThomas Gleixner # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 3279bf2bb3SThomas Gleixner extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); 3379bf2bb3SThomas Gleixner extern void tick_broadcast_oneshot_control(unsigned long reason); 3479bf2bb3SThomas Gleixner extern void tick_broadcast_switch_to_oneshot(void); 3579bf2bb3SThomas Gleixner extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); 36cd05a1f8SThomas Gleixner extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); 3727ce4cb4SThomas Gleixner extern int tick_broadcast_oneshot_active(void); 38fb02fbc1SThomas Gleixner extern void tick_check_oneshot_broadcast(int cpu); 393a142a06SThomas Gleixner bool tick_broadcast_oneshot_available(void); 4079bf2bb3SThomas Gleixner # else /* BROADCAST */ 4179bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 4279bf2bb3SThomas Gleixner { 4379bf2bb3SThomas Gleixner BUG(); 4479bf2bb3SThomas Gleixner } 4579bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 4679bf2bb3SThomas Gleixner static inline void tick_broadcast_switch_to_oneshot(void) { } 4779bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 4827ce4cb4SThomas Gleixner static inline int tick_broadcast_oneshot_active(void) { return 0; } 49fb02fbc1SThomas Gleixner static inline void tick_check_oneshot_broadcast(int cpu) { } 503a142a06SThomas Gleixner static inline bool tick_broadcast_oneshot_available(void) { return true; } 5179bf2bb3SThomas Gleixner # endif /* !BROADCAST */ 5279bf2bb3SThomas Gleixner 5379bf2bb3SThomas Gleixner #else /* !ONESHOT */ 5479bf2bb3SThomas Gleixner static inline 5579bf2bb3SThomas Gleixner void tick_setup_oneshot(struct clock_event_device *newdev, 5679bf2bb3SThomas Gleixner void (*handler)(struct clock_event_device *), 5779bf2bb3SThomas Gleixner ktime_t nextevt) 5879bf2bb3SThomas Gleixner { 5979bf2bb3SThomas Gleixner BUG(); 6079bf2bb3SThomas Gleixner } 61cd05a1f8SThomas Gleixner static inline void tick_resume_oneshot(void) 62cd05a1f8SThomas Gleixner { 63cd05a1f8SThomas Gleixner BUG(); 64cd05a1f8SThomas Gleixner } 6579bf2bb3SThomas Gleixner static inline int tick_program_event(ktime_t expires, int force) 6679bf2bb3SThomas Gleixner { 6779bf2bb3SThomas Gleixner return 0; 6879bf2bb3SThomas Gleixner } 6979bf2bb3SThomas Gleixner static inline void tick_oneshot_notify(void) { } 7079bf2bb3SThomas Gleixner static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 7179bf2bb3SThomas Gleixner { 7279bf2bb3SThomas Gleixner BUG(); 7379bf2bb3SThomas Gleixner } 7479bf2bb3SThomas Gleixner static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 7579bf2bb3SThomas Gleixner static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 76cd05a1f8SThomas Gleixner static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) 77cd05a1f8SThomas Gleixner { 78cd05a1f8SThomas Gleixner return 0; 79cd05a1f8SThomas Gleixner } 80f8e256c6SIngo Molnar static inline int tick_broadcast_oneshot_active(void) { return 0; } 813a142a06SThomas Gleixner static inline bool tick_broadcast_oneshot_available(void) { return false; } 8279bf2bb3SThomas Gleixner #endif /* !TICK_ONESHOT */ 8379bf2bb3SThomas Gleixner 8479bf2bb3SThomas Gleixner /* 85f8381cbaSThomas Gleixner * Broadcasting support 86f8381cbaSThomas Gleixner */ 87f8381cbaSThomas Gleixner #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 88f8381cbaSThomas Gleixner extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); 89f8381cbaSThomas Gleixner extern int tick_check_broadcast_device(struct clock_event_device *dev); 90f8381cbaSThomas Gleixner extern int tick_is_broadcast_device(struct clock_event_device *dev); 91f8381cbaSThomas Gleixner extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); 92f8381cbaSThomas Gleixner extern void tick_shutdown_broadcast(unsigned int *cpup); 936321dd60SThomas Gleixner extern void tick_suspend_broadcast(void); 946321dd60SThomas Gleixner extern int tick_resume_broadcast(void); 95f8381cbaSThomas Gleixner 96f8381cbaSThomas Gleixner extern void 97f8381cbaSThomas Gleixner tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); 98f8381cbaSThomas Gleixner 99f8381cbaSThomas Gleixner #else /* !BROADCAST */ 100f8381cbaSThomas Gleixner 101f8381cbaSThomas Gleixner static inline int tick_check_broadcast_device(struct clock_event_device *dev) 102f8381cbaSThomas Gleixner { 103f8381cbaSThomas Gleixner return 0; 104f8381cbaSThomas Gleixner } 105f8381cbaSThomas Gleixner 106f8381cbaSThomas Gleixner static inline int tick_is_broadcast_device(struct clock_event_device *dev) 107f8381cbaSThomas Gleixner { 108f8381cbaSThomas Gleixner return 0; 109f8381cbaSThomas Gleixner } 110f8381cbaSThomas Gleixner static inline int tick_device_uses_broadcast(struct clock_event_device *dev, 111f8381cbaSThomas Gleixner int cpu) 112f8381cbaSThomas Gleixner { 113f8381cbaSThomas Gleixner return 0; 114f8381cbaSThomas Gleixner } 115f8381cbaSThomas Gleixner static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } 116f8381cbaSThomas Gleixner static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } 117f8381cbaSThomas Gleixner static inline void tick_shutdown_broadcast(unsigned int *cpup) { } 1186321dd60SThomas Gleixner static inline void tick_suspend_broadcast(void) { } 1196321dd60SThomas Gleixner static inline int tick_resume_broadcast(void) { return 0; } 120f8381cbaSThomas Gleixner 121f8381cbaSThomas Gleixner /* 122f8381cbaSThomas Gleixner * Set the periodic handler in non broadcast mode 123f8381cbaSThomas Gleixner */ 124f8381cbaSThomas Gleixner static inline void tick_set_periodic_handler(struct clock_event_device *dev, 125f8381cbaSThomas Gleixner int broadcast) 126f8381cbaSThomas Gleixner { 127f8381cbaSThomas Gleixner dev->event_handler = tick_handle_periodic; 128f8381cbaSThomas Gleixner } 129f8381cbaSThomas Gleixner #endif /* !BROADCAST */ 130f8381cbaSThomas Gleixner 131f8381cbaSThomas Gleixner /* 132f8381cbaSThomas Gleixner * Check, if the device is functional or a dummy for broadcast 133f8381cbaSThomas Gleixner */ 134f8381cbaSThomas Gleixner static inline int tick_device_is_functional(struct clock_event_device *dev) 135f8381cbaSThomas Gleixner { 136f8381cbaSThomas Gleixner return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 137f8381cbaSThomas Gleixner } 138