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Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * tick internal variable and functions used by low/high res code | |
3 | */ | |
4 | ||
5 | #define TICK_DO_TIMER_NONE -1 | |
6 | #define TICK_DO_TIMER_BOOT -2 | |
7 | ||
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; | |
13 | ||
14 | extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); | |
15 | extern void tick_handle_periodic(struct clock_event_device *dev); | |
16 | ||
17 | extern void clockevents_shutdown(struct clock_event_device *dev); | |
18 | ||
19 | /* | |
20 | * NO_HZ / high resolution timer shared code | |
21 | */ | |
22 | #ifdef CONFIG_TICK_ONESHOT | |
23 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
24 | void (*handler)(struct clock_event_device *), | |
25 | ktime_t nextevt); | |
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) | |
41 | { | |
42 | BUG(); | |
43 | } | |
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 */ | |
49 | ||
50 | #else /* !ONESHOT */ | |
51 | static inline | |
52 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
53 | void (*handler)(struct clock_event_device *), | |
54 | ktime_t nextevt) | |
55 | { | |
56 | BUG(); | |
57 | } | |
58 | static inline void tick_resume_oneshot(void) | |
59 | { | |
60 | BUG(); | |
61 | } | |
62 | static inline int tick_program_event(ktime_t expires, int force) | |
63 | { | |
64 | return 0; | |
65 | } | |
66 | static inline void tick_oneshot_notify(void) { } | |
67 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
68 | { | |
69 | BUG(); | |
70 | } | |
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) | |
74 | { | |
75 | return 0; | |
76 | } | |
77 | #endif /* !TICK_ONESHOT */ | |
78 | ||
79 | /* | |
80 | * Broadcasting support | |
81 | */ | |
82 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
83 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); | |
84 | extern int tick_check_broadcast_device(struct clock_event_device *dev); | |
85 | extern int tick_is_broadcast_device(struct clock_event_device *dev); | |
86 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
87 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
88 | extern void tick_suspend_broadcast(void); | |
89 | extern int tick_resume_broadcast(void); | |
90 | ||
91 | extern void | |
92 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
93 | ||
94 | #else /* !BROADCAST */ | |
95 | ||
96 | static inline int tick_check_broadcast_device(struct clock_event_device *dev) | |
97 | { | |
98 | return 0; | |
99 | } | |
100 | ||
101 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
102 | { | |
103 | return 0; | |
104 | } | |
105 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
106 | int cpu) | |
107 | { | |
108 | return 0; | |
109 | } | |
110 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
111 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
112 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
113 | static inline void tick_suspend_broadcast(void) { } | |
114 | static inline int tick_resume_broadcast(void) { return 0; } | |
115 | ||
116 | /* | |
117 | * Set the periodic handler in non broadcast mode | |
118 | */ | |
119 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, | |
120 | int broadcast) | |
121 | { | |
122 | dev->event_handler = tick_handle_periodic; | |
123 | } | |
124 | #endif /* !BROADCAST */ | |
125 | ||
126 | /* | |
127 | * Check, if the device is functional or a dummy for broadcast | |
128 | */ | |
129 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
130 | { | |
131 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
132 | } |