blob: bb13f2724905de18829636053518cee424e1191d [file] [log] [blame]
Thomas Gleixnerf8381cb2007-02-16 01:28:02 -08001/*
2 * tick internal variable and functions used by low/high res code
3 */
4DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
5extern spinlock_t tick_device_lock;
6extern ktime_t tick_next_period;
7extern ktime_t tick_period;
Thomas Gleixnerd3ed7822007-05-08 00:30:03 -07008extern int tick_do_timer_cpu __read_mostly;
Thomas Gleixnerf8381cb2007-02-16 01:28:02 -08009
10extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
11extern void tick_handle_periodic(struct clock_event_device *dev);
12
13/*
Thomas Gleixner79bf2bb2007-02-16 01:28:03 -080014 * NO_HZ / high resolution timer shared code
15 */
16#ifdef CONFIG_TICK_ONESHOT
17extern void tick_setup_oneshot(struct clock_event_device *newdev,
18 void (*handler)(struct clock_event_device *),
19 ktime_t nextevt);
20extern int tick_program_event(ktime_t expires, int force);
21extern void tick_oneshot_notify(void);
22extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
Thomas Gleixnercd05a1f2007-03-17 00:25:52 +010023extern void tick_resume_oneshot(void);
Thomas Gleixner79bf2bb2007-02-16 01:28:03 -080024# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
25extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
26extern void tick_broadcast_oneshot_control(unsigned long reason);
27extern void tick_broadcast_switch_to_oneshot(void);
28extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
Thomas Gleixnercd05a1f2007-03-17 00:25:52 +010029extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
Thomas Gleixner79bf2bb2007-02-16 01:28:03 -080030# else /* BROADCAST */
31static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
32{
33 BUG();
34}
35static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
36static inline void tick_broadcast_switch_to_oneshot(void) { }
37static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
38# endif /* !BROADCAST */
39
40#else /* !ONESHOT */
41static inline
42void tick_setup_oneshot(struct clock_event_device *newdev,
43 void (*handler)(struct clock_event_device *),
44 ktime_t nextevt)
45{
46 BUG();
47}
Thomas Gleixnercd05a1f2007-03-17 00:25:52 +010048static inline void tick_resume_oneshot(void)
49{
50 BUG();
51}
Thomas Gleixner79bf2bb2007-02-16 01:28:03 -080052static inline int tick_program_event(ktime_t expires, int force)
53{
54 return 0;
55}
56static inline void tick_oneshot_notify(void) { }
57static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
58{
59 BUG();
60}
61static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
62static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
Thomas Gleixnercd05a1f2007-03-17 00:25:52 +010063static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
64{
65 return 0;
66}
Thomas Gleixner79bf2bb2007-02-16 01:28:03 -080067#endif /* !TICK_ONESHOT */
68
69/*
Thomas Gleixnerf8381cb2007-02-16 01:28:02 -080070 * Broadcasting support
71 */
72#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
73extern int tick_do_broadcast(cpumask_t mask);
Thomas Gleixnerf8381cb2007-02-16 01:28:02 -080074
75extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
76extern int tick_check_broadcast_device(struct clock_event_device *dev);
77extern int tick_is_broadcast_device(struct clock_event_device *dev);
78extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
79extern void tick_shutdown_broadcast(unsigned int *cpup);
Thomas Gleixner6321dd62007-03-06 08:25:42 +010080extern void tick_suspend_broadcast(void);
81extern int tick_resume_broadcast(void);
Thomas Gleixnerf8381cb2007-02-16 01:28:02 -080082
83extern void
84tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
85
86#else /* !BROADCAST */
87
88static inline int tick_check_broadcast_device(struct clock_event_device *dev)
89{
90 return 0;
91}
92
93static inline int tick_is_broadcast_device(struct clock_event_device *dev)
94{
95 return 0;
96}
97static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
98 int cpu)
99{
100 return 0;
101}
102static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
103static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
104static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
Thomas Gleixner6321dd62007-03-06 08:25:42 +0100105static inline void tick_suspend_broadcast(void) { }
106static inline int tick_resume_broadcast(void) { return 0; }
Thomas Gleixnerf8381cb2007-02-16 01:28:02 -0800107
108/*
109 * Set the periodic handler in non broadcast mode
110 */
111static inline void tick_set_periodic_handler(struct clock_event_device *dev,
112 int broadcast)
113{
114 dev->event_handler = tick_handle_periodic;
115}
116#endif /* !BROADCAST */
117
118/*
119 * Check, if the device is functional or a dummy for broadcast
120 */
121static inline int tick_device_is_functional(struct clock_event_device *dev)
122{
123 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
124}