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 */ 36 struct sys_timer { 37 struct sys_device dev; 38 void (*init)(void); 39 void (*suspend)(void); 40 void (*resume)(void); 41 #ifdef CONFIG_ARCH_USES_GETTIMEOFFSET 42 unsigned long (*offset)(void); 43 #endif 44 }; 45 46 extern void timer_tick(void); 47 48 #endif 49