Commit | Line | Data |
---|---|---|
f8381cba TG |
1 | /* |
2 | * tick internal variable and functions used by low/high res code | |
3 | */ | |
e2830b5c TH |
4 | #include <linux/hrtimer.h> |
5 | #include <linux/tick.h> | |
6441402b | 6 | |
7cf37e87 | 7 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD |
6441402b TG |
8 | |
9 | #define TICK_DO_TIMER_NONE -1 | |
10 | #define TICK_DO_TIMER_BOOT -2 | |
11 | ||
f8381cba | 12 | DECLARE_PER_CPU(struct tick_device, tick_cpu_device); |
f8381cba TG |
13 | extern ktime_t tick_next_period; |
14 | extern ktime_t tick_period; | |
d3ed7824 | 15 | extern int tick_do_timer_cpu __read_mostly; |
f8381cba TG |
16 | |
17 | extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); | |
18 | extern void tick_handle_periodic(struct clock_event_device *dev); | |
19 | ||
2344abbc TG |
20 | extern void clockevents_shutdown(struct clock_event_device *dev); |
21 | ||
79bf2bb3 TG |
22 | /* |
23 | * NO_HZ / high resolution timer shared code | |
24 | */ | |
25 | #ifdef CONFIG_TICK_ONESHOT | |
26 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
27 | void (*handler)(struct clock_event_device *), | |
28 | ktime_t nextevt); | |
1fb9b7d2 TG |
29 | extern int tick_dev_program_event(struct clock_event_device *dev, |
30 | ktime_t expires, int force); | |
79bf2bb3 TG |
31 | extern int tick_program_event(ktime_t expires, int force); |
32 | extern void tick_oneshot_notify(void); | |
33 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
cd05a1f8 | 34 | extern void tick_resume_oneshot(void); |
79bf2bb3 TG |
35 | # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
36 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
37 | extern void tick_broadcast_oneshot_control(unsigned long reason); | |
38 | extern void tick_broadcast_switch_to_oneshot(void); | |
39 | extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); | |
cd05a1f8 | 40 | extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); |
27ce4cb4 | 41 | extern int tick_broadcast_oneshot_active(void); |
fb02fbc1 | 42 | extern void tick_check_oneshot_broadcast(int cpu); |
3a142a06 | 43 | bool tick_broadcast_oneshot_available(void); |
79bf2bb3 TG |
44 | # else /* BROADCAST */ |
45 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
46 | { | |
47 | BUG(); | |
48 | } | |
49 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
50 | static inline void tick_broadcast_switch_to_oneshot(void) { } | |
51 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
27ce4cb4 | 52 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
fb02fbc1 | 53 | static inline void tick_check_oneshot_broadcast(int cpu) { } |
3a142a06 | 54 | static inline bool tick_broadcast_oneshot_available(void) { return true; } |
79bf2bb3 TG |
55 | # endif /* !BROADCAST */ |
56 | ||
57 | #else /* !ONESHOT */ | |
58 | static inline | |
59 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
60 | void (*handler)(struct clock_event_device *), | |
61 | ktime_t nextevt) | |
62 | { | |
63 | BUG(); | |
64 | } | |
cd05a1f8 TG |
65 | static inline void tick_resume_oneshot(void) |
66 | { | |
67 | BUG(); | |
68 | } | |
79bf2bb3 TG |
69 | static inline int tick_program_event(ktime_t expires, int force) |
70 | { | |
71 | return 0; | |
72 | } | |
73 | static inline void tick_oneshot_notify(void) { } | |
74 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
75 | { | |
76 | BUG(); | |
77 | } | |
78 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
79 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
cd05a1f8 TG |
80 | static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) |
81 | { | |
82 | return 0; | |
83 | } | |
f8e256c6 | 84 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
3a142a06 | 85 | static inline bool tick_broadcast_oneshot_available(void) { return false; } |
79bf2bb3 TG |
86 | #endif /* !TICK_ONESHOT */ |
87 | ||
f8381cba TG |
88 | /* |
89 | * Broadcasting support | |
90 | */ | |
91 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
f8381cba TG |
92 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
93 | extern int tick_check_broadcast_device(struct clock_event_device *dev); | |
94 | extern int tick_is_broadcast_device(struct clock_event_device *dev); | |
95 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
96 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
6321dd60 TG |
97 | extern void tick_suspend_broadcast(void); |
98 | extern int tick_resume_broadcast(void); | |
f8381cba TG |
99 | |
100 | extern void | |
101 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
102 | ||
103 | #else /* !BROADCAST */ | |
104 | ||
105 | static inline int tick_check_broadcast_device(struct clock_event_device *dev) | |
106 | { | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
111 | { | |
112 | return 0; | |
113 | } | |
114 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
115 | int cpu) | |
116 | { | |
117 | return 0; | |
118 | } | |
119 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
120 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
121 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
6321dd60 TG |
122 | static inline void tick_suspend_broadcast(void) { } |
123 | static inline int tick_resume_broadcast(void) { return 0; } | |
f8381cba TG |
124 | |
125 | /* | |
126 | * Set the periodic handler in non broadcast mode | |
127 | */ | |
128 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, | |
129 | int broadcast) | |
130 | { | |
131 | dev->event_handler = tick_handle_periodic; | |
132 | } | |
133 | #endif /* !BROADCAST */ | |
134 | ||
135 | /* | |
136 | * Check, if the device is functional or a dummy for broadcast | |
137 | */ | |
138 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
139 | { | |
140 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
141 | } | |
e2830b5c | 142 | |
7cf37e87 TG |
143 | #endif |
144 | ||
e2830b5c TH |
145 | extern void do_timer(unsigned long ticks); |
146 | extern seqlock_t xtime_lock; |