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Commit | Line | Data |
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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 | extern int tick_do_timer_cpu __read_mostly; | |
9 | ||
10 | extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); | |
11 | extern void tick_handle_periodic(struct clock_event_device *dev); | |
12 | ||
13 | /* | |
14 | * NO_HZ / high resolution timer shared code | |
15 | */ | |
16 | #ifdef CONFIG_TICK_ONESHOT | |
17 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
18 | void (*handler)(struct clock_event_device *), | |
19 | ktime_t nextevt); | |
20 | extern int tick_dev_program_event(struct clock_event_device *dev, | |
21 | ktime_t expires, int force); | |
22 | extern int tick_program_event(ktime_t expires, int force); | |
23 | extern void tick_oneshot_notify(void); | |
24 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
25 | extern void tick_resume_oneshot(void); | |
26 | # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
27 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
28 | extern void tick_broadcast_oneshot_control(unsigned long reason); | |
29 | extern void tick_broadcast_switch_to_oneshot(void); | |
30 | extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); | |
31 | extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); | |
32 | # else /* BROADCAST */ | |
33 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
34 | { | |
35 | BUG(); | |
36 | } | |
37 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
38 | static inline void tick_broadcast_switch_to_oneshot(void) { } | |
39 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
40 | # endif /* !BROADCAST */ | |
41 | ||
42 | #else /* !ONESHOT */ | |
43 | static inline | |
44 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
45 | void (*handler)(struct clock_event_device *), | |
46 | ktime_t nextevt) | |
47 | { | |
48 | BUG(); | |
49 | } | |
50 | static inline void tick_resume_oneshot(void) | |
51 | { | |
52 | BUG(); | |
53 | } | |
54 | static inline int tick_program_event(ktime_t expires, int force) | |
55 | { | |
56 | return 0; | |
57 | } | |
58 | static inline void tick_oneshot_notify(void) { } | |
59 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
60 | { | |
61 | BUG(); | |
62 | } | |
63 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
64 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
65 | static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) | |
66 | { | |
67 | return 0; | |
68 | } | |
69 | #endif /* !TICK_ONESHOT */ | |
70 | ||
71 | /* | |
72 | * Broadcasting support | |
73 | */ | |
74 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
75 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); | |
76 | extern int tick_check_broadcast_device(struct clock_event_device *dev); | |
77 | extern int tick_is_broadcast_device(struct clock_event_device *dev); | |
78 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
79 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
80 | extern void tick_suspend_broadcast(void); | |
81 | extern int tick_resume_broadcast(void); | |
82 | ||
83 | extern void | |
84 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
85 | ||
86 | #else /* !BROADCAST */ | |
87 | ||
88 | static inline int tick_check_broadcast_device(struct clock_event_device *dev) | |
89 | { | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
94 | { | |
95 | return 0; | |
96 | } | |
97 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
98 | int cpu) | |
99 | { | |
100 | return 0; | |
101 | } | |
102 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
103 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
104 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
105 | static inline void tick_suspend_broadcast(void) { } | |
106 | static inline int tick_resume_broadcast(void) { return 0; } | |
107 | ||
108 | /* | |
109 | * Set the periodic handler in non broadcast mode | |
110 | */ | |
111 | static 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 | */ | |
121 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
122 | { | |
123 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
124 | } |