Commit | Line | Data |
---|---|---|
f8381cba TG |
1 | /* |
2 | * tick internal variable and functions used by low/high res code | |
3 | */ | |
6441402b TG |
4 | |
5 | #define TICK_DO_TIMER_NONE -1 | |
6 | #define TICK_DO_TIMER_BOOT -2 | |
7 | ||
f8381cba TG |
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; | |
d3ed7824 | 12 | extern int tick_do_timer_cpu __read_mostly; |
f8381cba TG |
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 | ||
2344abbc TG |
17 | extern void clockevents_shutdown(struct clock_event_device *dev); |
18 | ||
79bf2bb3 TG |
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); | |
1fb9b7d2 TG |
26 | extern int tick_dev_program_event(struct clock_event_device *dev, |
27 | ktime_t expires, int force); | |
79bf2bb3 TG |
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 *)); | |
cd05a1f8 | 31 | extern void tick_resume_oneshot(void); |
79bf2bb3 TG |
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); | |
cd05a1f8 | 37 | extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); |
27ce4cb4 | 38 | extern int tick_broadcast_oneshot_active(void); |
fb02fbc1 | 39 | extern void tick_check_oneshot_broadcast(int cpu); |
79bf2bb3 TG |
40 | # else /* BROADCAST */ |
41 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
42 | { | |
43 | BUG(); | |
44 | } | |
45 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
46 | static inline void tick_broadcast_switch_to_oneshot(void) { } | |
47 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
27ce4cb4 | 48 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
fb02fbc1 | 49 | static inline void tick_check_oneshot_broadcast(int cpu) { } |
79bf2bb3 TG |
50 | # endif /* !BROADCAST */ |
51 | ||
52 | #else /* !ONESHOT */ | |
53 | static inline | |
54 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
55 | void (*handler)(struct clock_event_device *), | |
56 | ktime_t nextevt) | |
57 | { | |
58 | BUG(); | |
59 | } | |
cd05a1f8 TG |
60 | static inline void tick_resume_oneshot(void) |
61 | { | |
62 | BUG(); | |
63 | } | |
79bf2bb3 TG |
64 | static inline int tick_program_event(ktime_t expires, int force) |
65 | { | |
66 | return 0; | |
67 | } | |
68 | static inline void tick_oneshot_notify(void) { } | |
69 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
70 | { | |
71 | BUG(); | |
72 | } | |
73 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
74 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
cd05a1f8 TG |
75 | static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) |
76 | { | |
77 | return 0; | |
78 | } | |
f8e256c6 | 79 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
79bf2bb3 TG |
80 | #endif /* !TICK_ONESHOT */ |
81 | ||
f8381cba TG |
82 | /* |
83 | * Broadcasting support | |
84 | */ | |
85 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
f8381cba TG |
86 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
87 | extern int tick_check_broadcast_device(struct clock_event_device *dev); | |
88 | extern int tick_is_broadcast_device(struct clock_event_device *dev); | |
89 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
90 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
6321dd60 TG |
91 | extern void tick_suspend_broadcast(void); |
92 | extern int tick_resume_broadcast(void); | |
f8381cba TG |
93 | |
94 | extern void | |
95 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
96 | ||
97 | #else /* !BROADCAST */ | |
98 | ||
99 | static inline int tick_check_broadcast_device(struct clock_event_device *dev) | |
100 | { | |
101 | return 0; | |
102 | } | |
103 | ||
104 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
105 | { | |
106 | return 0; | |
107 | } | |
108 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
109 | int cpu) | |
110 | { | |
111 | return 0; | |
112 | } | |
113 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
114 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
115 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
6321dd60 TG |
116 | static inline void tick_suspend_broadcast(void) { } |
117 | static inline int tick_resume_broadcast(void) { return 0; } | |
f8381cba TG |
118 | |
119 | /* | |
120 | * Set the periodic handler in non broadcast mode | |
121 | */ | |
122 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, | |
123 | int broadcast) | |
124 | { | |
125 | dev->event_handler = tick_handle_periodic; | |
126 | } | |
127 | #endif /* !BROADCAST */ | |
128 | ||
129 | /* | |
130 | * Check, if the device is functional or a dummy for broadcast | |
131 | */ | |
132 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
133 | { | |
134 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
135 | } |