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8#ifndef _LINUX_CLOCKCHIPS_H
9#define _LINUX_CLOCKCHIPS_H
10
11#ifdef CONFIG_GENERIC_CLOCKEVENTS_BUILD
12
13#include <linux/clocksource.h>
14#include <linux/cpumask.h>
15#include <linux/ktime.h>
16#include <linux/notifier.h>
17
18struct clock_event_device;
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21enum clock_event_mode {
22 CLOCK_EVT_MODE_UNUSED = 0,
23 CLOCK_EVT_MODE_SHUTDOWN,
24 CLOCK_EVT_MODE_PERIODIC,
25 CLOCK_EVT_MODE_ONESHOT,
26 CLOCK_EVT_MODE_RESUME,
27};
28
29
30enum clock_event_nofitiers {
31 CLOCK_EVT_NOTIFY_ADD,
32 CLOCK_EVT_NOTIFY_BROADCAST_ON,
33 CLOCK_EVT_NOTIFY_BROADCAST_OFF,
34 CLOCK_EVT_NOTIFY_BROADCAST_FORCE,
35 CLOCK_EVT_NOTIFY_BROADCAST_ENTER,
36 CLOCK_EVT_NOTIFY_BROADCAST_EXIT,
37 CLOCK_EVT_NOTIFY_SUSPEND,
38 CLOCK_EVT_NOTIFY_RESUME,
39 CLOCK_EVT_NOTIFY_CPU_DYING,
40 CLOCK_EVT_NOTIFY_CPU_DEAD,
41};
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46#define CLOCK_EVT_FEAT_PERIODIC 0x000001
47#define CLOCK_EVT_FEAT_ONESHOT 0x000002
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54#define CLOCK_EVT_FEAT_C3STOP 0x000004
55#define CLOCK_EVT_FEAT_DUMMY 0x000008
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77struct clock_event_device {
78 const char *name;
79 unsigned int features;
80 unsigned long max_delta_ns;
81 unsigned long min_delta_ns;
82 unsigned long mult;
83 int shift;
84 int rating;
85 int irq;
86 const struct cpumask *cpumask;
87 int (*set_next_event)(unsigned long evt,
88 struct clock_event_device *);
89 void (*set_mode)(enum clock_event_mode mode,
90 struct clock_event_device *);
91 void (*event_handler)(struct clock_event_device *);
92 void (*broadcast)(const struct cpumask *mask);
93 struct list_head list;
94 enum clock_event_mode mode;
95 ktime_t next_event;
96};
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108
109static inline unsigned long div_sc(unsigned long ticks, unsigned long nsec,
110 int shift)
111{
112 uint64_t tmp = ((uint64_t)ticks) << shift;
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114 do_div(tmp, nsec);
115 return (unsigned long) tmp;
116}
117
118
119extern unsigned long clockevent_delta2ns(unsigned long latch,
120 struct clock_event_device *evt);
121extern void clockevents_register_device(struct clock_event_device *dev);
122
123extern void clockevents_exchange_device(struct clock_event_device *old,
124 struct clock_event_device *new);
125extern void clockevents_set_mode(struct clock_event_device *dev,
126 enum clock_event_mode mode);
127extern int clockevents_register_notifier(struct notifier_block *nb);
128extern int clockevents_program_event(struct clock_event_device *dev,
129 ktime_t expires, ktime_t now);
130
131extern void clockevents_handle_noop(struct clock_event_device *dev);
132
133#ifdef CONFIG_GENERIC_CLOCKEVENTS
134extern void clockevents_notify(unsigned long reason, void *arg);
135#else
136# define clockevents_notify(reason, arg) do { } while (0)
137#endif
138
139#else
140
141#define clockevents_notify(reason, arg) do { } while (0)
142
143#endif
144
145#endif
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