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/*
* Copyright 2001 MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
*
* include/asm-mips/time.h
* header file for the new style time.c file and time services.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
*/
/*
* Please refer to Documentation/MIPS/time.README.
*/
#ifndef _ASM_TIME_H
#define _ASM_TIME_H
#include <linux/ptrace.h> /* for struct pt_regs */
#include <linux/linkage.h> /* for asmlinkage */
#include <linux/rtc.h> /* for struct rtc_time */
/*
* RTC ops. By default, they point a no-RTC functions.
* rtc_get_time - mktime(year, mon, day, hour, min, sec) in seconds.
* rtc_set_time - reverse the above translation and set time to RTC.
*/
extern unsigned long (*rtc_get_time)(void);
extern int (*rtc_set_time)(unsigned long);
/*
* to_tm() converts system time back to (year, mon, day, hour, min, sec).
* It is intended to help implement rtc_set_time() functions.
* Copied from PPC implementation.
*/
extern void to_tm(unsigned long tim, struct rtc_time * tm);
/*
* do_gettimeoffset(). By default, this func pointer points to
* do_null_gettimeoffset(), which leads to the same resolution as HZ.
* Higher resolution versions are vailable, which gives ~1us resolution.
*/
extern unsigned long (*do_gettimeoffset)(void);
extern unsigned long null_gettimeoffset(void);
extern unsigned long fixed_rate_gettimeoffset(void);
extern unsigned long calibrate_div32_gettimeoffset(void);
extern unsigned long calibrate_div64_gettimeoffset(void);
/*
* high-level timer interrupt routines.
*/
extern void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
/*
* the corresponding low-level timer interrupt routine.
*/
asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs);
/*
* board specific routines required by time_init().
* board_time_init is defaulted to NULL and can remains so.
* board_timer_setup must be setup properly in machine setup routine.
*/
struct irqaction;
extern void (*board_time_init)(void);
extern void (*board_timer_setup)(struct irqaction *irq);
/*
* mips_counter_frequency - must be set if you intend to use
* counter as timer interrupt source or use fixed_rate_gettimeoffset.
*/
extern unsigned int mips_counter_frequency;
#endif /* _ASM_TIME_H */
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