76 lines
2.2 KiB
C
76 lines
2.2 KiB
C
/*
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* linux/include/asm-arm/mach/time.h
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*
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* Copyright (C) 2004 MontaVista Software, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_ARM_MACH_TIME_H
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#define __ASM_ARM_MACH_TIME_H
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#include <linux/sysdev.h>
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/*
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* This is our kernel timer structure.
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*
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* - init
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* Initialise the kernels jiffy timer source, claim interrupt
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* using setup_irq. This is called early on during initialisation
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* while interrupts are still disabled on the local CPU.
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* - suspend
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* Suspend the kernel jiffy timer source, if necessary. This
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* is called with interrupts disabled, after all normal devices
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* have been suspended. If no action is required, set this to
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* NULL.
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* - resume
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* Resume the kernel jiffy timer source, if necessary. This
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* is called with interrupts disabled before any normal devices
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* are resumed. If no action is required, set this to NULL.
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* - offset
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* Return the timer offset in microseconds since the last timer
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* interrupt. Note: this must take account of any unprocessed
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* timer interrupt which may be pending.
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*/
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struct sys_timer {
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struct sys_device dev;
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void (*init)(void);
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void (*suspend)(void);
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void (*resume)(void);
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unsigned long (*offset)(void);
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#ifdef CONFIG_NO_IDLE_HZ
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struct dyn_tick_timer *dyn_tick;
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#endif
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};
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#ifdef CONFIG_NO_IDLE_HZ
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#define DYN_TICK_ENABLED (1 << 1)
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struct dyn_tick_timer {
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unsigned int state; /* Current state */
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int (*enable)(void); /* Enables dynamic tick */
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int (*disable)(void); /* Disables dynamic tick */
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void (*reprogram)(unsigned long); /* Reprograms the timer */
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int (*handler)(int, void *, struct pt_regs *);
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};
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void timer_dyn_reprogram(void);
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#else
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#define timer_dyn_reprogram() do { } while (0)
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#endif
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extern struct sys_timer *system_timer;
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extern void timer_tick(struct pt_regs *);
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/*
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* Kernel time keeping support.
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*/
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extern int (*set_rtc)(void);
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extern void save_time_delta(struct timespec *delta, struct timespec *rtc);
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extern void restore_time_delta(struct timespec *delta, struct timespec *rtc);
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#endif
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