1 /* 2 * tick internal variable and functions used by low/high res code 3 */ 4 DECLARE_PER_CPU(struct tick_device, tick_cpu_device); 5 extern spinlock_t tick_device_lock; 6 extern ktime_t tick_next_period; 7 extern ktime_t tick_period; 8 9 extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); 10 extern void tick_handle_periodic(struct clock_event_device *dev); 11 12 /* 13 * NO_HZ / high resolution timer shared code 14 */ 15 #ifdef CONFIG_TICK_ONESHOT 16 extern void tick_setup_oneshot(struct clock_event_device *newdev, 17 void (*handler)(struct clock_event_device *), 18 ktime_t nextevt); 19 extern int tick_program_event(ktime_t expires, int force); 20 extern void tick_oneshot_notify(void); 21 extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); 22 23 # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 24 extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); 25 extern void tick_broadcast_oneshot_control(unsigned long reason); 26 extern void tick_broadcast_switch_to_oneshot(void); 27 extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); 28 # else /* BROADCAST */ 29 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 30 { 31 BUG(); 32 } 33 static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 34 static inline void tick_broadcast_switch_to_oneshot(void) { } 35 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 36 # endif /* !BROADCAST */ 37 38 #else /* !ONESHOT */ 39 static inline 40 void tick_setup_oneshot(struct clock_event_device *newdev, 41 void (*handler)(struct clock_event_device *), 42 ktime_t nextevt) 43 { 44 BUG(); 45 } 46 static inline int tick_program_event(ktime_t expires, int force) 47 { 48 return 0; 49 } 50 static inline void tick_oneshot_notify(void) { } 51 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 52 { 53 BUG(); 54 } 55 static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 56 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 57 #endif /* !TICK_ONESHOT */ 58 59 /* 60 * Broadcasting support 61 */ 62 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 63 extern int tick_do_broadcast(cpumask_t mask); 64 65 extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); 66 extern int tick_check_broadcast_device(struct clock_event_device *dev); 67 extern int tick_is_broadcast_device(struct clock_event_device *dev); 68 extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); 69 extern void tick_shutdown_broadcast(unsigned int *cpup); 70 71 extern void 72 tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); 73 74 #else /* !BROADCAST */ 75 76 static inline int tick_check_broadcast_device(struct clock_event_device *dev) 77 { 78 return 0; 79 } 80 81 static inline int tick_is_broadcast_device(struct clock_event_device *dev) 82 { 83 return 0; 84 } 85 static inline int tick_device_uses_broadcast(struct clock_event_device *dev, 86 int cpu) 87 { 88 return 0; 89 } 90 static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } 91 static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } 92 static inline void tick_shutdown_broadcast(unsigned int *cpup) { } 93 94 /* 95 * Set the periodic handler in non broadcast mode 96 */ 97 static inline void tick_set_periodic_handler(struct clock_event_device *dev, 98 int broadcast) 99 { 100 dev->event_handler = tick_handle_periodic; 101 } 102 #endif /* !BROADCAST */ 103 104 /* 105 * Check, if the device is functional or a dummy for broadcast 106 */ 107 static inline int tick_device_is_functional(struct clock_event_device *dev) 108 { 109 return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 110 } 111