80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/*
|
|
* 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);
|
|
#ifndef CONFIG_GENERIC_TIME
|
|
unsigned long (*offset)(void);
|
|
#endif
|
|
|
|
#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 *);
|
|
};
|
|
|
|
void timer_dyn_reprogram(void);
|
|
#else
|
|
#define timer_dyn_reprogram() do { } while (0)
|
|
#endif
|
|
|
|
extern struct sys_timer *system_timer;
|
|
extern void timer_tick(void);
|
|
|
|
/*
|
|
* 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
|