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 | |
8b094cd0 | 7 | #include "timekeeping.h" |
c1797baf | 8 | #include "tick-sched.h" |
8b094cd0 | 9 | |
9f083b74 | 10 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
6441402b | 11 | |
3ae7a939 IM |
12 | # define TICK_DO_TIMER_NONE -1 |
13 | # define TICK_DO_TIMER_BOOT -2 | |
6441402b | 14 | |
f8381cba | 15 | DECLARE_PER_CPU(struct tick_device, tick_cpu_device); |
f8381cba TG |
16 | extern ktime_t tick_next_period; |
17 | extern ktime_t tick_period; | |
d3ed7824 | 18 | extern int tick_do_timer_cpu __read_mostly; |
f8381cba TG |
19 | |
20 | extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); | |
21 | extern void tick_handle_periodic(struct clock_event_device *dev); | |
7172a286 | 22 | extern void tick_check_new_device(struct clock_event_device *dev); |
a49b116d | 23 | extern void tick_shutdown(unsigned int cpu); |
8c53daf6 | 24 | extern void tick_suspend(void); |
f46481d0 | 25 | extern void tick_resume(void); |
03e13cf5 TG |
26 | extern bool tick_check_replacement(struct clock_event_device *curdev, |
27 | struct clock_event_device *newdev); | |
28 | extern void tick_install_replacement(struct clock_event_device *dev); | |
c1797baf | 29 | extern int tick_is_oneshot_available(void); |
7270d11c | 30 | extern struct tick_device *tick_get_device(int cpu); |
f8381cba | 31 | |
554ef387 | 32 | extern int clockevents_tick_resume(struct clock_event_device *dev); |
b7475eb5 TG |
33 | /* Check, if the device is functional or a dummy for broadcast */ |
34 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
35 | { | |
36 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
37 | } | |
2344abbc | 38 | |
b7475eb5 | 39 | extern void clockevents_shutdown(struct clock_event_device *dev); |
c1797baf TG |
40 | extern void clockevents_exchange_device(struct clock_event_device *old, |
41 | struct clock_event_device *new); | |
7270d11c TG |
42 | extern void clockevents_set_state(struct clock_event_device *dev, |
43 | enum clock_event_state state); | |
44 | extern int clockevents_program_event(struct clock_event_device *dev, | |
45 | ktime_t expires, bool force); | |
c1797baf | 46 | extern void clockevents_handle_noop(struct clock_event_device *dev); |
b7475eb5 | 47 | extern int __clockevents_update_freq(struct clock_event_device *dev, u32 freq); |
891292a7 | 48 | extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt); |
79bf2bb3 | 49 | |
b7475eb5 | 50 | /* Broadcasting support */ |
3ae7a939 | 51 | # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
f8381cba | 52 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
7172a286 | 53 | extern void tick_install_broadcast_device(struct clock_event_device *dev); |
f8381cba | 54 | extern int tick_is_broadcast_device(struct clock_event_device *dev); |
a49b116d | 55 | extern void tick_shutdown_broadcast(unsigned int cpu); |
6321dd60 | 56 | extern void tick_suspend_broadcast(void); |
f46481d0 TG |
57 | extern void tick_resume_broadcast(void); |
58 | extern bool tick_resume_check_broadcast(void); | |
b352bc1c | 59 | extern void tick_broadcast_init(void); |
b7475eb5 TG |
60 | extern void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); |
61 | extern int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq); | |
c1797baf TG |
62 | extern struct tick_device *tick_get_broadcast_device(void); |
63 | extern struct cpumask *tick_get_broadcast_mask(void); | |
3ae7a939 | 64 | # else /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST: */ |
b7475eb5 TG |
65 | static inline void tick_install_broadcast_device(struct clock_event_device *dev) { } |
66 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) { return 0; } | |
67 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu) { return 0; } | |
f8381cba | 68 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } |
a49b116d | 69 | static inline void tick_shutdown_broadcast(unsigned int cpu) { } |
6321dd60 | 70 | static inline void tick_suspend_broadcast(void) { } |
f46481d0 TG |
71 | static inline void tick_resume_broadcast(void) { } |
72 | static inline bool tick_resume_check_broadcast(void) { return false; } | |
b352bc1c | 73 | static inline void tick_broadcast_init(void) { } |
b7475eb5 | 74 | static inline int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq) { return -ENODEV; } |
f8381cba | 75 | |
b7475eb5 TG |
76 | /* Set the periodic handler in non broadcast mode */ |
77 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, int broadcast) | |
f8381cba TG |
78 | { |
79 | dev->event_handler = tick_handle_periodic; | |
80 | } | |
3ae7a939 IM |
81 | # endif /* !CONFIG_GENERIC_CLOCKEVENTS_BROADCAST */ |
82 | ||
83 | #else /* !GENERIC_CLOCKEVENTS: */ | |
84 | static inline void tick_suspend(void) { } | |
85 | static inline void tick_resume(void) { } | |
86 | #endif /* !GENERIC_CLOCKEVENTS */ | |
87 | ||
88 | /* Oneshot related functions */ | |
89 | #ifdef CONFIG_TICK_ONESHOT | |
90 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
91 | void (*handler)(struct clock_event_device *), | |
92 | ktime_t nextevt); | |
93 | extern int tick_program_event(ktime_t expires, int force); | |
94 | extern void tick_oneshot_notify(void); | |
95 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
96 | extern void tick_resume_oneshot(void); | |
97 | static inline bool tick_oneshot_possible(void) { return true; } | |
98 | extern int tick_oneshot_mode_active(void); | |
99 | extern void tick_clock_notify(void); | |
100 | extern int tick_check_oneshot_change(int allow_nohz); | |
101 | extern int tick_init_highres(void); | |
102 | #else /* !CONFIG_TICK_ONESHOT: */ | |
103 | static inline | |
104 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
105 | void (*handler)(struct clock_event_device *), | |
106 | ktime_t nextevt) { BUG(); } | |
107 | static inline void tick_resume_oneshot(void) { BUG(); } | |
108 | static inline int tick_program_event(ktime_t expires, int force) { return 0; } | |
109 | static inline void tick_oneshot_notify(void) { } | |
110 | static inline bool tick_oneshot_possible(void) { return false; } | |
111 | static inline int tick_oneshot_mode_active(void) { return 0; } | |
112 | static inline void tick_clock_notify(void) { } | |
113 | static inline int tick_check_oneshot_change(int allow_nohz) { return 0; } | |
114 | #endif /* !CONFIG_TICK_ONESHOT */ | |
f8381cba | 115 | |
b7475eb5 TG |
116 | /* Functions related to oneshot broadcasting */ |
117 | #if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT) | |
118 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
b7475eb5 | 119 | extern void tick_broadcast_switch_to_oneshot(void); |
a49b116d | 120 | extern void tick_shutdown_broadcast_oneshot(unsigned int cpu); |
b7475eb5 TG |
121 | extern int tick_broadcast_oneshot_active(void); |
122 | extern void tick_check_oneshot_broadcast_this_cpu(void); | |
123 | bool tick_broadcast_oneshot_available(void); | |
c1797baf | 124 | extern struct cpumask *tick_get_broadcast_oneshot_mask(void); |
3ae7a939 | 125 | #else /* !(BROADCAST && ONESHOT): */ |
b7475eb5 | 126 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { BUG(); } |
b7475eb5 | 127 | static inline void tick_broadcast_switch_to_oneshot(void) { } |
a49b116d | 128 | static inline void tick_shutdown_broadcast_oneshot(unsigned int cpu) { } |
b7475eb5 TG |
129 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
130 | static inline void tick_check_oneshot_broadcast_this_cpu(void) { } | |
131 | static inline bool tick_broadcast_oneshot_available(void) { return tick_oneshot_possible(); } | |
3ae7a939 | 132 | #endif /* !(BROADCAST && ONESHOT) */ |
7cf37e87 | 133 | |
b7475eb5 TG |
134 | /* NO_HZ_FULL internal */ |
135 | #ifdef CONFIG_NO_HZ_FULL | |
136 | extern void tick_nohz_init(void); | |
137 | # else | |
138 | static inline void tick_nohz_init(void) { } | |
139 | #endif |