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 extern void tick_resume_oneshot(void); 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 extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); 29 # else /* BROADCAST */ 30 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 31 { 32 BUG(); 33 } 34 static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 35 static inline void tick_broadcast_switch_to_oneshot(void) { } 36 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 37 # endif /* !BROADCAST */ 38 39 #else /* !ONESHOT */ 40 static inline 41 void tick_setup_oneshot(struct clock_event_device *newdev, 42 void (*handler)(struct clock_event_device *), 43 ktime_t nextevt) 44 { 45 BUG(); 46 } 47 static inline void tick_resume_oneshot(void) 48 { 49 BUG(); 50 } 51 static inline int tick_program_event(ktime_t expires, int force) 52 { 53 return 0; 54 } 55 static inline void tick_oneshot_notify(void) { } 56 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) 57 { 58 BUG(); 59 } 60 static inline void tick_broadcast_oneshot_control(unsigned long reason) { } 61 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } 62 static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) 63 { 64 return 0; 65 } 66 #endif /* !TICK_ONESHOT */ 67 68 /* 69 * Broadcasting support 70 */ 71 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST 72 extern int tick_do_broadcast(cpumask_t mask); 73 74 extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); 75 extern int tick_check_broadcast_device(struct clock_event_device *dev); 76 extern int tick_is_broadcast_device(struct clock_event_device *dev); 77 extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); 78 extern void tick_shutdown_broadcast(unsigned int *cpup); 79 extern void tick_suspend_broadcast(void); 80 extern int tick_resume_broadcast(void); 81 82 extern void 83 tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); 84 85 #else /* !BROADCAST */ 86 87 static inline int tick_check_broadcast_device(struct clock_event_device *dev) 88 { 89 return 0; 90 } 91 92 static inline int tick_is_broadcast_device(struct clock_event_device *dev) 93 { 94 return 0; 95 } 96 static inline int tick_device_uses_broadcast(struct clock_event_device *dev, 97 int cpu) 98 { 99 return 0; 100 } 101 static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } 102 static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } 103 static inline void tick_shutdown_broadcast(unsigned int *cpup) { } 104 static inline void tick_suspend_broadcast(void) { } 105 static inline int tick_resume_broadcast(void) { return 0; } 106 107 /* 108 * Set the periodic handler in non broadcast mode 109 */ 110 static inline void tick_set_periodic_handler(struct clock_event_device *dev, 111 int broadcast) 112 { 113 dev->event_handler = tick_handle_periodic; 114 } 115 #endif /* !BROADCAST */ 116 117 /* 118 * Check, if the device is functional or a dummy for broadcast 119 */ 120 static inline int tick_device_is_functional(struct clock_event_device *dev) 121 { 122 return !(dev->features & CLOCK_EVT_FEAT_DUMMY); 123 } 124