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Commit | Line | Data |
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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 | 34 | extern void clockevents_shutdown(struct clock_event_device *dev); |
554ef387 | 35 | extern int clockevents_tick_resume(struct clock_event_device *dev); |
2344abbc | 36 | |
891292a7 | 37 | extern ssize_t sysfs_get_uname(const char *buf, char *dst, size_t cnt); |
03e13cf5 | 38 | |
79bf2bb3 TG |
39 | /* |
40 | * NO_HZ / high resolution timer shared code | |
41 | */ | |
42 | #ifdef CONFIG_TICK_ONESHOT | |
43 | extern void tick_setup_oneshot(struct clock_event_device *newdev, | |
44 | void (*handler)(struct clock_event_device *), | |
45 | ktime_t nextevt); | |
46 | extern int tick_program_event(ktime_t expires, int force); | |
47 | extern void tick_oneshot_notify(void); | |
48 | extern int tick_switch_to_oneshot(void (*handler)(struct clock_event_device *)); | |
cd05a1f8 | 49 | extern void tick_resume_oneshot(void); |
79bf2bb3 TG |
50 | # ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
51 | extern void tick_broadcast_setup_oneshot(struct clock_event_device *bc); | |
da7e6f45 | 52 | extern int tick_broadcast_oneshot_control(unsigned long reason); |
79bf2bb3 TG |
53 | extern void tick_broadcast_switch_to_oneshot(void); |
54 | extern void tick_shutdown_broadcast_oneshot(unsigned int *cpup); | |
cd05a1f8 | 55 | extern int tick_resume_broadcast_oneshot(struct clock_event_device *bc); |
27ce4cb4 | 56 | extern int tick_broadcast_oneshot_active(void); |
e8fcaa5c | 57 | extern void tick_check_oneshot_broadcast_this_cpu(void); |
3a142a06 | 58 | bool tick_broadcast_oneshot_available(void); |
79bf2bb3 TG |
59 | # else /* BROADCAST */ |
60 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
61 | { | |
62 | BUG(); | |
63 | } | |
da7e6f45 | 64 | static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; } |
79bf2bb3 TG |
65 | static inline void tick_broadcast_switch_to_oneshot(void) { } |
66 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } | |
27ce4cb4 | 67 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
e8fcaa5c | 68 | static inline void tick_check_oneshot_broadcast_this_cpu(void) { } |
3a142a06 | 69 | static inline bool tick_broadcast_oneshot_available(void) { return true; } |
79bf2bb3 TG |
70 | # endif /* !BROADCAST */ |
71 | ||
72 | #else /* !ONESHOT */ | |
73 | static inline | |
74 | void tick_setup_oneshot(struct clock_event_device *newdev, | |
75 | void (*handler)(struct clock_event_device *), | |
76 | ktime_t nextevt) | |
77 | { | |
78 | BUG(); | |
79 | } | |
cd05a1f8 TG |
80 | static inline void tick_resume_oneshot(void) |
81 | { | |
82 | BUG(); | |
83 | } | |
79bf2bb3 TG |
84 | static inline int tick_program_event(ktime_t expires, int force) |
85 | { | |
86 | return 0; | |
87 | } | |
88 | static inline void tick_oneshot_notify(void) { } | |
89 | static inline void tick_broadcast_setup_oneshot(struct clock_event_device *bc) | |
90 | { | |
91 | BUG(); | |
92 | } | |
da7e6f45 | 93 | static inline int tick_broadcast_oneshot_control(unsigned long reason) { return 0; } |
79bf2bb3 | 94 | static inline void tick_shutdown_broadcast_oneshot(unsigned int *cpup) { } |
cd05a1f8 TG |
95 | static inline int tick_resume_broadcast_oneshot(struct clock_event_device *bc) |
96 | { | |
97 | return 0; | |
98 | } | |
f8e256c6 | 99 | static inline int tick_broadcast_oneshot_active(void) { return 0; } |
3a142a06 | 100 | static inline bool tick_broadcast_oneshot_available(void) { return false; } |
79bf2bb3 TG |
101 | #endif /* !TICK_ONESHOT */ |
102 | ||
a80e49e2 FW |
103 | /* NO_HZ_FULL internal */ |
104 | #ifdef CONFIG_NO_HZ_FULL | |
105 | extern void tick_nohz_init(void); | |
106 | # else | |
107 | static inline void tick_nohz_init(void) { } | |
108 | #endif | |
109 | ||
f8381cba TG |
110 | /* |
111 | * Broadcasting support | |
112 | */ | |
113 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST | |
f8381cba | 114 | extern int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu); |
7172a286 | 115 | extern void tick_install_broadcast_device(struct clock_event_device *dev); |
f8381cba TG |
116 | extern int tick_is_broadcast_device(struct clock_event_device *dev); |
117 | extern void tick_broadcast_on_off(unsigned long reason, int *oncpu); | |
118 | extern void tick_shutdown_broadcast(unsigned int *cpup); | |
6321dd60 TG |
119 | extern void tick_suspend_broadcast(void); |
120 | extern int tick_resume_broadcast(void); | |
b352bc1c | 121 | extern void tick_broadcast_init(void); |
f8381cba TG |
122 | extern void |
123 | tick_set_periodic_handler(struct clock_event_device *dev, int broadcast); | |
627ee794 | 124 | int tick_broadcast_update_freq(struct clock_event_device *dev, u32 freq); |
f8381cba TG |
125 | |
126 | #else /* !BROADCAST */ | |
127 | ||
7172a286 | 128 | static inline void tick_install_broadcast_device(struct clock_event_device *dev) |
f8381cba | 129 | { |
f8381cba TG |
130 | } |
131 | ||
132 | static inline int tick_is_broadcast_device(struct clock_event_device *dev) | |
133 | { | |
134 | return 0; | |
135 | } | |
136 | static inline int tick_device_uses_broadcast(struct clock_event_device *dev, | |
137 | int cpu) | |
138 | { | |
139 | return 0; | |
140 | } | |
141 | static inline void tick_do_periodic_broadcast(struct clock_event_device *d) { } | |
142 | static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { } | |
143 | static inline void tick_shutdown_broadcast(unsigned int *cpup) { } | |
6321dd60 TG |
144 | static inline void tick_suspend_broadcast(void) { } |
145 | static inline int tick_resume_broadcast(void) { return 0; } | |
b352bc1c | 146 | static inline void tick_broadcast_init(void) { } |
627ee794 TG |
147 | static inline int tick_broadcast_update_freq(struct clock_event_device *dev, |
148 | u32 freq) { return -ENODEV; } | |
f8381cba TG |
149 | |
150 | /* | |
151 | * Set the periodic handler in non broadcast mode | |
152 | */ | |
153 | static inline void tick_set_periodic_handler(struct clock_event_device *dev, | |
154 | int broadcast) | |
155 | { | |
156 | dev->event_handler = tick_handle_periodic; | |
157 | } | |
158 | #endif /* !BROADCAST */ | |
159 | ||
160 | /* | |
161 | * Check, if the device is functional or a dummy for broadcast | |
162 | */ | |
163 | static inline int tick_device_is_functional(struct clock_event_device *dev) | |
164 | { | |
165 | return !(dev->features & CLOCK_EVT_FEAT_DUMMY); | |
166 | } | |
e2830b5c | 167 | |
f1689bb7 TG |
168 | int __clockevents_update_freq(struct clock_event_device *dev, u32 freq); |
169 | ||
7cf37e87 TG |
170 | #endif |
171 | ||
e2830b5c | 172 | extern void do_timer(unsigned long ticks); |
47a1b796 | 173 | extern void update_wall_time(void); |