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1/*
2 * tick internal variable and functions used by low/high res code
3 */
4#include <linux/hrtimer.h>
5#include <linux/tick.h>
6
7extern seqlock_t jiffies_lock;
8
9#define CS_NAME_LEN 32
10
11#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
12
13#define TICK_DO_TIMER_NONE -1
14#define TICK_DO_TIMER_BOOT -2
15
16DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
17extern ktime_t tick_next_period;
18extern ktime_t tick_period;
19extern int tick_do_timer_cpu __read_mostly;
20
21extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
22extern void tick_handle_periodic(struct clock_event_device *dev);
23extern void tick_check_new_device(struct clock_event_device *dev);
24extern void tick_handover_do_timer(int *cpup);
25extern void tick_shutdown(unsigned int *cpup);
26extern void tick_suspend(void);
27extern void tick_resume(void);
28extern bool tick_check_replacement(struct clock_event_device *curdev,
29 struct clock_event_device *newdev);
30extern void tick_install_replacement(struct clock_event_device *dev);
31
32extern void clockevents_shutdown(struct clock_event_device *dev);
33
34extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt);
35
36/*
37 * NO_HZ / high resolution timer shared code
38 */
39#ifdef CONFIG_TICK_ONESHOT
40extern void tick_setup_oneshot(struct clock_event_device *newdev,
41 void (*handler)(struct clock_event_device *),
42 ktime_t nextevt);
43extern int tick_program_event(ktime_t expires, int force);
44extern void tick_oneshot_notify(void);
45extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
46extern void tick_resume_oneshot(void);
47# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
48extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
49extern int tick_broadcast_oneshot_control(unsigned long reason);
50extern void tick_broadcast_switch_to_oneshot(void);
51extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
52extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
53extern int tick_broadcast_oneshot_active(void);
54extern void tick_check_oneshot_broadcast_this_cpu(void);
55bool tick_broadcast_oneshot_available(void);
56# else /* BROADCAST */
57static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
58{
59 BUG();
60}
61static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; }
62static inline void tick_broadcast_switch_to_oneshot(void) { }
63static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
64static inline int tick_broadcast_oneshot_active(void) { return 0; }
65static inline void tick_check_oneshot_broadcast_this_cpu(void) { }
66static inline bool tick_broadcast_oneshot_available(void) { return true; }
67# endif /* !BROADCAST */
68
69#else /* !ONESHOT */
70static inline
71void tick_setup_oneshot(struct clock_event_device *newdev,
72 void (*handler)(struct clock_event_device *),
73 ktime_t nextevt)
74{
75 BUG();
76}
77static inline void tick_resume_oneshot(void)
78{
79 BUG();
80}
81static inline int tick_program_event(ktime_t expires, int force)
82{
83 return 0;
84}
85static inline void tick_oneshot_notify(void) { }
86static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
87{
88 BUG();
89}
90static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; }
91static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
92static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
93{
94 return 0;
95}
96static inline int tick_broadcast_oneshot_active(void) { return 0; }
97static inline bool tick_broadcast_oneshot_available(void) { return false; }
98#endif /* !TICK_ONESHOT */
99
100/*
101 * Broadcasting support
102 */
103#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
104extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
105extern void tick_install_broadcast_device(struct clock_event_device *dev);
106extern int tick_is_broadcast_device(struct clock_event_device *dev);
107extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
108extern void tick_shutdown_broadcast(unsigned int *cpup);
109extern void tick_suspend_broadcast(void);
110extern int tick_resume_broadcast(void);
111extern void tick_broadcast_init(void);
112extern void
113tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
114int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq);
115
116#else /* !BROADCAST */
117
118static inline void tick_install_broadcast_device(struct clock_event_device *dev)
119{
120}
121
122static inline int tick_is_broadcast_device(struct clock_event_device *dev)
123{
124 return 0;
125}
126static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
127 int cpu)
128{
129 return 0;
130}
131static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
132static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
133static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
134static inline void tick_suspend_broadcast(void) { }
135static inline int tick_resume_broadcast(void) { return 0; }
136static inline void tick_broadcast_init(void) { }
137static inline int tick_broadcast_update_freq(struct clock_event_device *dev,
138 u32 freq) { return -ENODEV; }
139
140/*
141 * Set the periodic handler in non broadcast mode
142 */
143static inline void tick_set_periodic_handler(struct clock_event_device *dev,
144 int broadcast)
145{
146 dev->event_handler = tick_handle_periodic;
147}
148#endif /* !BROADCAST */
149
150/*
151 * Check, if the device is functional or a dummy for broadcast
152 */
153static inline int tick_device_is_functional(struct clock_event_device *dev)
154{
155 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
156}
157
158int __clockevents_update_freq(struct clock_event_device *dev, u32 freq);
159
160#endif
161
162extern void do_timer(unsigned long ticks);
163extern void update_wall_time(void);
1/*
2 * tick internal variable and functions used by low/high res code
3 */
4#include <linux/hrtimer.h>
5#include <linux/tick.h>
6
7#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
8
9#define TICK_DO_TIMER_NONE -1
10#define TICK_DO_TIMER_BOOT -2
11
12DECLARE_PER_CPU(struct tick_device, tick_cpu_device);
13extern ktime_t tick_next_period;
14extern ktime_t tick_period;
15extern int tick_do_timer_cpu __read_mostly;
16
17extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast);
18extern void tick_handle_periodic(struct clock_event_device *dev);
19
20extern void clockevents_shutdown(struct clock_event_device *dev);
21
22/*
23 * NO_HZ / high resolution timer shared code
24 */
25#ifdef CONFIG_TICK_ONESHOT
26extern void tick_setup_oneshot(struct clock_event_device *newdev,
27 void (*handler)(struct clock_event_device *),
28 ktime_t nextevt);
29extern int tick_program_event(ktime_t expires, int force);
30extern void tick_oneshot_notify(void);
31extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *));
32extern void tick_resume_oneshot(void);
33# ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
34extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc);
35extern void tick_broadcast_oneshot_control(unsigned long reason);
36extern void tick_broadcast_switch_to_oneshot(void);
37extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup);
38extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc);
39extern int tick_broadcast_oneshot_active(void);
40extern void tick_check_oneshot_broadcast(int cpu);
41bool tick_broadcast_oneshot_available(void);
42# else /* BROADCAST */
43static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
44{
45 BUG();
46}
47static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
48static inline void tick_broadcast_switch_to_oneshot(void) { }
49static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
50static inline int tick_broadcast_oneshot_active(void) { return 0; }
51static inline void tick_check_oneshot_broadcast(int cpu) { }
52static inline bool tick_broadcast_oneshot_available(void) { return true; }
53# endif /* !BROADCAST */
54
55#else /* !ONESHOT */
56static inline
57void tick_setup_oneshot(struct clock_event_device *newdev,
58 void (*handler)(struct clock_event_device *),
59 ktime_t nextevt)
60{
61 BUG();
62}
63static inline void tick_resume_oneshot(void)
64{
65 BUG();
66}
67static inline int tick_program_event(ktime_t expires, int force)
68{
69 return 0;
70}
71static inline void tick_oneshot_notify(void) { }
72static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
73{
74 BUG();
75}
76static inline void tick_broadcast_oneshot_control(unsigned long reason) { }
77static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { }
78static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
79{
80 return 0;
81}
82static inline int tick_broadcast_oneshot_active(void) { return 0; }
83static inline bool tick_broadcast_oneshot_available(void) { return false; }
84#endif /* !TICK_ONESHOT */
85
86/*
87 * Broadcasting support
88 */
89#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
90extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu);
91extern int tick_check_broadcast_device(struct clock_event_device *dev);
92extern int tick_is_broadcast_device(struct clock_event_device *dev);
93extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
94extern void tick_shutdown_broadcast(unsigned int *cpup);
95extern void tick_suspend_broadcast(void);
96extern int tick_resume_broadcast(void);
97
98extern void
99tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
100
101#else /* !BROADCAST */
102
103static inline int tick_check_broadcast_device(struct clock_event_device *dev)
104{
105 return 0;
106}
107
108static inline int tick_is_broadcast_device(struct clock_event_device *dev)
109{
110 return 0;
111}
112static inline int tick_device_uses_broadcast(struct clock_event_device *dev,
113 int cpu)
114{
115 return 0;
116}
117static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { }
118static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
119static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
120static inline void tick_suspend_broadcast(void) { }
121static inline int tick_resume_broadcast(void) { return 0; }
122
123/*
124 * Set the periodic handler in non broadcast mode
125 */
126static 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 */
136static inline int tick_device_is_functional(struct clock_event_device *dev)
137{
138 return !(dev->features & CLOCK_EVT_FEAT_DUMMY);
139}
140
141#endif
142
143extern void do_timer(unsigned long ticks);
144extern seqlock_t xtime_lock;