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/*
* Copyright (C) 2001, 2002, MontaVista Software Inc.
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
* Copyright (c) 2003 Maciej W. Rozycki
*
* 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/interrupt.h>
#include <linux/linkage.h>
#include <linux/ptrace.h>
#include <linux/rtc.h>
#include <linux/spinlock.h>
extern spinlock_t rtc_lock;
/*
* RTC ops. By default, they point to no-RTC functions.
* rtc_mips_get_time - mktime(year, mon, day, hour, min, sec) in seconds.
* rtc_mips_set_time - reverse the above translation and set time to RTC.
* rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need
* to be set. Used by RTC sync-up.
*/
extern unsigned long (*rtc_mips_get_time)(void);
extern int (*rtc_mips_set_time)(unsigned long);
extern int (*rtc_mips_set_mmss)(unsigned long);
/*
* Timer interrupt functions.
* mips_timer_state is needed for high precision timer calibration.
* mips_timer_ack may be NULL if the interrupt is self-recoverable.
*/
extern int (*mips_timer_state)(void);
extern void (*mips_timer_ack)(void);
/*
* High precision timer functions.
* If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted.
*/
extern unsigned int (*mips_hpt_read)(void);
extern void (*mips_hpt_init)(unsigned int);
/*
* 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 available, which give ~1us resolution.
*/
extern unsigned long (*do_gettimeoffset)(void);
/*
* high-level timer interrupt routines.
*/
extern irqreturn_t timer_interrupt(int irq, void *dev_id);
/*
* the corresponding low-level timer interrupt routine.
*/
extern asmlinkage void ll_timer_interrupt(int irq);
/*
* profiling and process accouting is done separately in local_timer_interrupt
*/
extern void local_timer_interrupt(int irq, void *dev_id);
extern asmlinkage void ll_local_timer_interrupt(int irq);
/*
* board specific routines required by time_init().
* board_time_init is defaulted to NULL and can remain so.
* plat_timer_setup must be setup properly in machine setup routine.
*/
struct irqaction;
extern void (*board_time_init)(void);
extern void plat_timer_setup(struct irqaction *irq);
/*
* mips_hpt_frequency - must be set if you intend to use an R4k-compatible
* counter as a timer interrupt source; otherwise it can be set up
* automagically with an aid of mips_timer_state.
*/
extern unsigned int mips_hpt_frequency;
#endif /* _ASM_TIME_H */
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