]> git.karo-electronics.de Git - mv-sheeva.git/blob - kernel/time/tick-internal.h
Merge branch 'for-2.6.38' of git://linux-nfs.org/~bfields/linux
[mv-sheeva.git] / kernel / time / tick-internal.h
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 ktime_t tick_next_period;
10 extern ktime_t tick_period;
11 extern int tick_do_timer_cpu __read_mostly;
12
13 extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
14 extern void tick_handle_periodic(struct clock_event_device *dev);
15
16 extern void clockevents_shutdown(struct clock_event_device *dev);
17
18 /*
19  * NO_HZ / high resolution timer shared code
20  */
21 #ifdef CONFIG_TICK_ONESHOT
22 extern void tick_setup_oneshot(struct clock_event_device *newdev,
23                                void (*handler)(struct clock_event_device *),
24                                ktime_t nextevt);
25 extern int tick_dev_program_event(struct clock_event_device *dev,
26                                   ktime_t expires, int force);
27 extern int tick_program_event(ktime_t expires, int force);
28 extern void tick_oneshot_notify(void);
29 extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
30 extern void tick_resume_oneshot(void);
31 # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
32 extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
33 extern void tick_broadcast_oneshot_control(unsigned long reason);
34 extern void tick_broadcast_switch_to_oneshot(void);
35 extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
36 extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
37 extern int tick_broadcast_oneshot_active(void);
38 extern void tick_check_oneshot_broadcast(int cpu);
39 bool tick_broadcast_oneshot_available(void);
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) { }
48 static inline int tick_broadcast_oneshot_active(void) { return 0; }
49 static inline void tick_check_oneshot_broadcast(int cpu) { }
50 static inline bool tick_broadcast_oneshot_available(void) { return true; }
51 # endif /* !BROADCAST */
52
53 #else /* !ONESHOT */
54 static inline
55 void tick_setup_oneshot(struct clock_event_device *newdev,
56                         void (*handler)(struct clock_event_device *),
57                         ktime_t nextevt)
58 {
59         BUG();
60 }
61 static inline void tick_resume_oneshot(void)
62 {
63         BUG();
64 }
65 static inline int tick_program_event(ktime_t expires, int force)
66 {
67         return 0;
68 }
69 static inline void tick_oneshot_notify(void) { }
70 static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
71 {
72         BUG();
73 }
74 static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
75 static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
76 static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
77 {
78         return 0;
79 }
80 static inline int tick_broadcast_oneshot_active(void) { return 0; }
81 static inline bool tick_broadcast_oneshot_available(void) { return false; }
82 #endif /* !TICK_ONESHOT */
83
84 /*
85  * Broadcasting support
86  */
87 #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
88 extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
89 extern int tick_check_broadcast_device(struct clock_event_device *dev);
90 extern int tick_is_broadcast_device(struct clock_event_device *dev);
91 extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
92 extern void tick_shutdown_broadcast(unsigned int *cpup);
93 extern void tick_suspend_broadcast(void);
94 extern int tick_resume_broadcast(void);
95
96 extern void
97 tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
98
99 #else /* !BROADCAST */
100
101 static inline int tick_check_broadcast_device(struct clock_event_device *dev)
102 {
103         return 0;
104 }
105
106 static inline int tick_is_broadcast_device(struct clock_event_device *dev)
107 {
108         return 0;
109 }
110 static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
111                                              int cpu)
112 {
113         return 0;
114 }
115 static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
116 static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
117 static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
118 static inline void tick_suspend_broadcast(void) { }
119 static inline int tick_resume_broadcast(void) { return 0; }
120
121 /*
122  * Set the periodic handler in non broadcast mode
123  */
124 static inline void tick_set_periodic_handler(struct clock_event_device *dev,
125                                              int broadcast)
126 {
127         dev->event_handler = tick_handle_periodic;
128 }
129 #endif /* !BROADCAST */
130
131 /*
132  * Check, if the device is functional or a dummy for broadcast
133  */
134 static inline int tick_device_is_functional(struct clock_event_device *dev)
135 {
136         return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
137 }