blob: dee0bc336fe8393ae8e13b4079a1a3f3eab6f328 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
/*
* linux/include/asm-arm/mach/time.h
*
* Copyright (C) 2004 MontaVista Software, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_ARM_MACH_TIME_H
#define __ASM_ARM_MACH_TIME_H
#include <linux/sysdev.h>
/*
* This is our kernel timer structure.
*
* - init
* Initialise the kernels jiffy timer source, claim interrupt
* using setup_irq. This is called early on during initialisation
* while interrupts are still disabled on the local CPU.
* - suspend
* Suspend the kernel jiffy timer source, if necessary. This
* is called with interrupts disabled, after all normal devices
* have been suspended. If no action is required, set this to
* NULL.
* - resume
* Resume the kernel jiffy timer source, if necessary. This
* is called with interrupts disabled before any normal devices
* are resumed. If no action is required, set this to NULL.
* - offset
* Return the timer offset in microseconds since the last timer
* interrupt. Note: this must take account of any unprocessed
* timer interrupt which may be pending.
*/
struct sys_timer {
struct sys_device dev;
void (*init)(void);
void (*suspend)(void);
void (*resume)(void);
unsigned long (*offset)(void);
#ifdef CONFIG_NO_IDLE_HZ
struct dyn_tick_timer *dyn_tick;
#endif
};
#ifdef CONFIG_NO_IDLE_HZ
#define DYN_TICK_ENABLED (1 << 1)
struct dyn_tick_timer {
spinlock_t lock;
unsigned int state; /* Current state */
int (*enable)(void); /* Enables dynamic tick */
int (*disable)(void); /* Disables dynamic tick */
void (*reprogram)(unsigned long); /* Reprograms the timer */
int (*handler)(int, void *, struct pt_regs *);
};
void timer_dyn_reprogram(void);
#else
#define timer_dyn_reprogram() do { } while (0)
#endif
extern struct sys_timer *system_timer;
extern void timer_tick(struct pt_regs *);
/*
* Kernel time keeping support.
*/
struct timespec;
extern int (*set_rtc)(void);
extern void save_time_delta(struct timespec *delta, struct timespec *rtc);
extern void restore_time_delta(struct timespec *delta, struct timespec *rtc);
#endif
|
