2 * tick internal variable and functions used by low/high res code
5 #define TICK_DO_TIMER_NONE -1
6 #define TICK_DO_TIMER_BOOT -2
8 DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
9 extern spinlock_t tick_device_lock;
10 extern ktime_t tick_next_period;
11 extern ktime_t tick_period;
12 extern int tick_do_timer_cpu __read_mostly;
14 extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
15 extern void tick_handle_periodic(struct clock_event_device *dev);
17 extern void clockevents_shutdown(struct clock_event_device *dev);
20 * NO_HZ / high resolution timer shared code
22 #ifdef CONFIG_TICK_ONESHOT
23 extern void tick_setup_oneshot(struct clock_event_device *newdev,
24 void (*handler)(struct clock_event_device *),
26 extern int tick_dev_program_event(struct clock_event_device *dev,
27 ktime_t expires, int force);
28 extern int tick_program_event(ktime_t expires, int force);
29 extern void tick_oneshot_notify(void);
30 extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
31 extern void tick_resume_oneshot(void);
32 # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
33 extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
34 extern void tick_broadcast_oneshot_control(unsigned long reason);
35 extern void tick_broadcast_switch_to_oneshot(void);
36 extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
37 extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
38 extern int tick_broadcast_oneshot_active(void);
39 # else /* BROADCAST */
40 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
44 static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
45 static inline void tick_broadcast_switch_to_oneshot(void) { }
46 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
47 static inline int tick_broadcast_oneshot_active(void) { return 0; }
48 # endif /* !BROADCAST */
52 void tick_setup_oneshot(struct clock_event_device *newdev,
53 void (*handler)(struct clock_event_device *),
58 static inline void tick_resume_oneshot(void)
62 static inline int tick_program_event(ktime_t expires, int force)
66 static inline void tick_oneshot_notify(void) { }
67 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
71 static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
72 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
73 static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
77 static inline int tick_broadcast_oneshot_active(void) { return 0; }
78 #endif /* !TICK_ONESHOT */
81 * Broadcasting support
83 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
84 extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
85 extern int tick_check_broadcast_device(struct clock_event_device *dev);
86 extern int tick_is_broadcast_device(struct clock_event_device *dev);
87 extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
88 extern void tick_shutdown_broadcast(unsigned int *cpup);
89 extern void tick_suspend_broadcast(void);
90 extern int tick_resume_broadcast(void);
93 tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
95 #else /* !BROADCAST */
97 static inline int tick_check_broadcast_device(struct clock_event_device *dev)
102 static inline int tick_is_broadcast_device(struct clock_event_device *dev)
106 static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
111 static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
112 static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
113 static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
114 static inline void tick_suspend_broadcast(void) { }
115 static inline int tick_resume_broadcast(void) { return 0; }
118 * Set the periodic handler in non broadcast mode
120 static inline void tick_set_periodic_handler(struct clock_event_device *dev,
123 dev->event_handler = tick_handle_periodic;
125 #endif /* !BROADCAST */
128 * Check, if the device is functional or a dummy for broadcast
130 static inline int tick_device_is_functional(struct clock_event_device *dev)
132 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);