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 TG |
7 | #include "timekeeping.h" |
8 | ||
eb93e4d9 TG |
9 | extern seqlock_t jiffies_lock; |
10 | ||
c7e99fc7 TG |
11 | #define CS_NAME_LEN 32 |
12 | ||
7cf37e87 | 13 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD |
6441402b TG |
14 | |
15 | #define TICK_DO_TIMER_NONE -1 | |
16 | #define TICK_DO_TIMER_BOOT -2 | |
17 | ||
f8381cba | 18 | DECLARE_PER_CPU(struct tick_device, tick_cpu_device); |
f8381cba TG |
19 | extern ktime_t tick_next_period; |
20 | extern ktime_t tick_period; | |
d3ed7824 | 21 | extern int tick_do_timer_cpu __read_mostly; |
f8381cba TG |
22 | |
23 | extern void tick_setup_periodic(struct clock_event_device *dev, int broadcast); | |
24 | extern void tick_handle_periodic(struct clock_event_device *dev); | |
7172a286 | 25 | extern void tick_check_new_device(struct clock_event_device *dev); |
8c53daf6 TG |
26 | extern void tick_handover_do_timer(int *cpup); |
27 | extern void tick_shutdown(unsigned int *cpup); | |
28 | extern void tick_suspend(void); | |
29 | extern void tick_resume(void); | |
03e13cf5 TG |
30 | extern bool tick_check_replacement(struct clock_event_device *curdev, |
31 | struct clock_event_device *newdev); | |
32 | extern void tick_install_replacement(struct clock_event_device *dev); | |
f8381cba | 33 | |
2344abbc TG |
34 | extern void clockevents_shutdown(struct clock_event_device *dev); |
35 | ||
891292a7 | 36 | extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt); |
03e13cf5 | 37 | |
79bf2bb3 TG |
38 | /* |
39 | * NO_HZ / high resolution timer shared code | |
40 | */ | |
41 | #ifdef CONFIG_TICK_ONESHOT | |
42 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
43 | void (*handler)(struct clock_event_device *), | |
44 | ktime_t nextevt); | |
45 | extern int tick_program_event(ktime_t expires, int force); | |
46 | extern void tick_oneshot_notify(void); | |
47 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
cd05a1f8 | 48 | extern void tick_resume_oneshot(void); |
79bf2bb3 TG |
49 | # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
50 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
da7e6f45 | 51 | extern int tick_broadcast_oneshot_control(unsigned long reason); |
79bf2bb3 TG |
52 | extern void tick_broadcast_switch_to_oneshot(void); |
53 | extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); | |
cd05a1f8 | 54 | extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); |
27ce4cb4 | 55 | extern int tick_broadcast_oneshot_active(void); |
e8fcaa5c | 56 | extern void tick_check_oneshot_broadcast_this_cpu(void); |
3a142a06 | 57 | bool tick_broadcast_oneshot_available(void); |
79bf2bb3 TG |
58 | # else /* BROADCAST */ |
59 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
60 | { | |
61 | BUG(); | |
62 | } | |
da7e6f45 | 63 | static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; } |
79bf2bb3 TG |
64 | static inline void tick_broadcast_switch_to_oneshot(void) { } |
65 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
27ce4cb4 | 66 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
e8fcaa5c | 67 | static inline void tick_check_oneshot_broadcast_this_cpu(void) { } |
3a142a06 | 68 | static inline bool tick_broadcast_oneshot_available(void) { return true; } |
79bf2bb3 TG |
69 | # endif /* !BROADCAST */ |
70 | ||
71 | #else /* !ONESHOT */ | |
72 | static inline | |
73 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
74 | void (*handler)(struct clock_event_device *), | |
75 | ktime_t nextevt) | |
76 | { | |
77 | BUG(); | |
78 | } | |
cd05a1f8 TG |
79 | static inline void tick_resume_oneshot(void) |
80 | { | |
81 | BUG(); | |
82 | } | |
79bf2bb3 TG |
83 | static inline int tick_program_event(ktime_t expires, int force) |
84 | { | |
85 | return 0; | |
86 | } | |
87 | static inline void tick_oneshot_notify(void) { } | |
88 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
89 | { | |
90 | BUG(); | |
91 | } | |
da7e6f45 | 92 | static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; } |
79bf2bb3 | 93 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } |
cd05a1f8 TG |
94 | static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) |
95 | { | |
96 | return 0; | |
97 | } | |
f8e256c6 | 98 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
3a142a06 | 99 | static inline bool tick_broadcast_oneshot_available(void) { return false; } |
79bf2bb3 TG |
100 | #endif /* !TICK_ONESHOT */ |
101 | ||
a80e49e2 FW |
102 | /* NO_HZ_FULL internal */ |
103 | #ifdef CONFIG_NO_HZ_FULL | |
104 | extern void tick_nohz_init(void); | |
105 | # else | |
106 | static inline void tick_nohz_init(void) { } | |
107 | #endif | |
108 | ||
f8381cba TG |
109 | /* |
110 | * Broadcasting support | |
111 | */ | |
112 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
f8381cba | 113 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
7172a286 | 114 | extern void tick_install_broadcast_device(struct clock_event_device *dev); |
f8381cba TG |
115 | extern int tick_is_broadcast_device(struct clock_event_device *dev); |
116 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
117 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
6321dd60 TG |
118 | extern void tick_suspend_broadcast(void); |
119 | extern int tick_resume_broadcast(void); | |
b352bc1c | 120 | extern void tick_broadcast_init(void); |
f8381cba TG |
121 | extern void |
122 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
627ee794 | 123 | int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq); |
f8381cba TG |
124 | |
125 | #else /* !BROADCAST */ | |
126 | ||
7172a286 | 127 | static inline void tick_install_broadcast_device(struct clock_event_device *dev) |
f8381cba | 128 | { |
f8381cba TG |
129 | } |
130 | ||
131 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
132 | { | |
133 | return 0; | |
134 | } | |
135 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
136 | int cpu) | |
137 | { | |
138 | return 0; | |
139 | } | |
140 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
141 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
142 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
6321dd60 TG |
143 | static inline void tick_suspend_broadcast(void) { } |
144 | static inline int tick_resume_broadcast(void) { return 0; } | |
b352bc1c | 145 | static inline void tick_broadcast_init(void) { } |
627ee794 TG |
146 | static inline int tick_broadcast_update_freq(struct clock_event_device *dev, |
147 | u32 freq) { return -ENODEV; } | |
f8381cba TG |
148 | |
149 | /* | |
150 | * Set the periodic handler in non broadcast mode | |
151 | */ | |
152 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, | |
153 | int broadcast) | |
154 | { | |
155 | dev->event_handler = tick_handle_periodic; | |
156 | } | |
157 | #endif /* !BROADCAST */ | |
158 | ||
159 | /* | |
160 | * Check, if the device is functional or a dummy for broadcast | |
161 | */ | |
162 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
163 | { | |
164 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
165 | } | |
e2830b5c | 166 | |
f1689bb7 TG |
167 | int __clockevents_update_freq(struct clock_event_device *dev, u32 freq); |
168 | ||
7cf37e87 TG |
169 | #endif |
170 | ||
e2830b5c | 171 | extern void do_timer(unsigned long ticks); |
47a1b796 | 172 | extern void update_wall_time(void); |