1/* 2 * arch/arm/include/asm/mach/time.h 3 * 4 * Copyright (C) 2004 MontaVista Software, Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10#ifndef __ASM_ARM_MACH_TIME_H 11#define __ASM_ARM_MACH_TIME_H 12 13#include <linux/sysdev.h> 14 15/* 16 * This is our kernel timer structure. 17 * 18 * - init 19 * Initialise the kernels jiffy timer source, claim interrupt 20 * using setup_irq. This is called early on during initialisation 21 * while interrupts are still disabled on the local CPU. 22 * - suspend 23 * Suspend the kernel jiffy timer source, if necessary. This 24 * is called with interrupts disabled, after all normal devices 25 * have been suspended. If no action is required, set this to 26 * NULL. 27 * - resume 28 * Resume the kernel jiffy timer source, if necessary. This 29 * is called with interrupts disabled before any normal devices 30 * are resumed. If no action is required, set this to NULL. 31 * - offset 32 * Return the timer offset in microseconds since the last timer 33 * interrupt. Note: this must take account of any unprocessed 34 * timer interrupt which may be pending. 35 */ 36struct sys_timer { 37 void (*init)(void); 38 void (*suspend)(void); 39 void (*resume)(void); 40#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET 41 unsigned long (*offset)(void); 42#endif 43}; 44 45extern void timer_tick(void); 46 47#endif 48