1/* 2 * Copyright (C) 2001, 2002, MontaVista Software Inc. 3 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net 4 * Copyright (c) 2003 Maciej W. Rozycki 5 * 6 * include/asm-mips/time.h 7 * header file for the new style time.c file and time services. 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 * 14 * Please refer to Documentation/mips/time.README. 15 */ 16#ifndef _ASM_TIME_H 17#define _ASM_TIME_H 18 19#include <linux/interrupt.h> 20#include <linux/linkage.h> 21#include <linux/ptrace.h> 22#include <linux/rtc.h> 23#include <linux/spinlock.h> 24#include <linux/clocksource.h> 25 26extern spinlock_t rtc_lock; 27 28/* 29 * RTC ops. By default, they point to no-RTC functions. 30 * rtc_mips_get_time - mktime(year, mon, day, hour, min, sec) in seconds. 31 * rtc_mips_set_time - reverse the above translation and set time to RTC. 32 * rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need 33 * to be set. Used by RTC sync-up. 34 */ 35extern unsigned long (*rtc_mips_get_time)(void); 36extern int (*rtc_mips_set_time)(unsigned long); 37extern int (*rtc_mips_set_mmss)(unsigned long); 38 39/* 40 * Timer interrupt functions. 41 * mips_timer_state is needed for high precision timer calibration. 42 * mips_timer_ack may be NULL if the interrupt is self-recoverable. 43 */ 44extern int (*mips_timer_state)(void); 45extern void (*mips_timer_ack)(void); 46 47/* 48 * High precision timer clocksource. 49 * If .read is NULL, an R4k-compatible timer setup is attempted. 50 */ 51extern struct clocksource clocksource_mips; 52 53/* 54 * to_tm() converts system time back to (year, mon, day, hour, min, sec). 55 * It is intended to help implement rtc_set_time() functions. 56 * Copied from PPC implementation. 57 */ 58extern void to_tm(unsigned long tim, struct rtc_time *tm); 59 60/* 61 * high-level timer interrupt routines. 62 */ 63extern irqreturn_t timer_interrupt(int irq, void *dev_id); 64 65/* 66 * the corresponding low-level timer interrupt routine. 67 */ 68extern asmlinkage void ll_timer_interrupt(int irq); 69 70/* 71 * profiling and process accouting is done separately in local_timer_interrupt 72 */ 73extern void local_timer_interrupt(int irq, void *dev_id); 74extern asmlinkage void ll_local_timer_interrupt(int irq); 75 76/* 77 * board specific routines required by time_init(). 78 * board_time_init is defaulted to NULL and can remain so. 79 * plat_timer_setup must be setup properly in machine setup routine. 80 */ 81struct irqaction; 82extern void (*board_time_init)(void); 83extern void plat_timer_setup(struct irqaction *irq); 84 85/* 86 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible 87 * counter as a timer interrupt source; otherwise it can be set up 88 * automagically with an aid of mips_timer_state. 89 */ 90extern unsigned int mips_hpt_frequency; 91 92#endif /* _ASM_TIME_H */ 93