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); | |
29 | extern int tick_program_event(ktime_t expires, int force); | |
30 | extern void tick_oneshot_notify(void); | |
31 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
cd05a1f8 | 32 | extern void tick_resume_oneshot(void); |
79bf2bb3 TG |
33 | # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
34 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
35 | extern void tick_broadcast_oneshot_control(unsigned long reason); | |
36 | extern void tick_broadcast_switch_to_oneshot(void); | |
37 | extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); | |
cd05a1f8 | 38 | extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); |
27ce4cb4 | 39 | extern int tick_broadcast_oneshot_active(void); |
fb02fbc1 | 40 | extern void tick_check_oneshot_broadcast(int cpu); |
3a142a06 | 41 | bool tick_broadcast_oneshot_available(void); |
79bf2bb3 TG |
42 | # else /* BROADCAST */ |
43 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
44 | { | |
45 | BUG(); | |
46 | } | |
47 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
48 | static inline void tick_broadcast_switch_to_oneshot(void) { } | |
49 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
27ce4cb4 | 50 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
fb02fbc1 | 51 | static inline void tick_check_oneshot_broadcast(int cpu) { } |
3a142a06 | 52 | static inline bool tick_broadcast_oneshot_available(void) { return true; } |
79bf2bb3 TG |
53 | # endif /* !BROADCAST */ |
54 | ||
55 | #else /* !ONESHOT */ | |
56 | static inline | |
57 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
58 | void (*handler)(struct clock_event_device *), | |
59 | ktime_t nextevt) | |
60 | { | |
61 | BUG(); | |
62 | } | |
cd05a1f8 TG |
63 | static inline void tick_resume_oneshot(void) |
64 | { | |
65 | BUG(); | |
66 | } | |
79bf2bb3 TG |
67 | static inline int tick_program_event(ktime_t expires, int force) |
68 | { | |
69 | return 0; | |
70 | } | |
71 | static inline void tick_oneshot_notify(void) { } | |
72 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
73 | { | |
74 | BUG(); | |
75 | } | |
76 | static inline void tick_broadcast_oneshot_control(unsigned long reason) { } | |
77 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
cd05a1f8 TG |
78 | static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) |
79 | { | |
80 | return 0; | |
81 | } | |
f8e256c6 | 82 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
3a142a06 | 83 | static inline bool tick_broadcast_oneshot_available(void) { return false; } |
79bf2bb3 TG |
84 | #endif /* !TICK_ONESHOT */ |
85 | ||
f8381cba TG |
86 | /* |
87 | * Broadcasting support | |
88 | */ | |
89 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
f8381cba TG |
90 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
91 | extern int tick_check_broadcast_device(struct clock_event_device *dev); | |
92 | extern int tick_is_broadcast_device(struct clock_event_device *dev); | |
93 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
94 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
6321dd60 TG |
95 | extern void tick_suspend_broadcast(void); |
96 | extern int tick_resume_broadcast(void); | |
f8381cba TG |
97 | |
98 | extern void | |
99 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
100 | ||
101 | #else /* !BROADCAST */ | |
102 | ||
103 | static inline int tick_check_broadcast_device(struct clock_event_device *dev) | |
104 | { | |
105 | return 0; | |
106 | } | |
107 | ||
108 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
109 | { | |
110 | return 0; | |
111 | } | |
112 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
113 | int cpu) | |
114 | { | |
115 | return 0; | |
116 | } | |
117 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
118 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
119 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
6321dd60 TG |
120 | static inline void tick_suspend_broadcast(void) { } |
121 | static inline int tick_resume_broadcast(void) { return 0; } | |
f8381cba TG |
122 | |
123 | /* | |
124 | * Set the periodic handler in non broadcast mode | |
125 | */ | |
126 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, | |
127 | int broadcast) | |
128 | { | |
129 | dev->event_handler = tick_handle_periodic; | |
130 | } | |
131 | #endif /* !BROADCAST */ | |
132 | ||
133 | /* | |
134 | * Check, if the device is functional or a dummy for broadcast | |
135 | */ | |
136 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
137 | { | |
138 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
139 | } | |
e2830b5c | 140 | |
7cf37e87 TG |
141 | #endif |
142 | ||
e2830b5c | 143 | extern void do_timer(unsigned long ticks); |