/*
* Copyright (C) 2001, 2002, MontaVista Software Inc.
* Author: Jun Sun, [email protected] or [email protected]
* 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.
*/
#ifndef _ASM_TIME_H
#define _ASM_TIME_H

#include <linux/rtc.h>
#include <linux/spinlock.h>
#include <linux/clockchips.h>
#include <linux/clocksource.h>

extern spinlock_t rtc_lock;

/*
* RTC ops. By default, they point to weak no-op RTC functions.
* 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 int rtc_mips_set_time(unsigned long);
extern int rtc_mips_set_mmss(unsigned long);

/*
* board specific routines required by time_init().
*/
extern void plat_time_init(void);

/*
* mips_hpt_frequency - must be set if you intend to use an R4k-compatible
* counter as a timer interrupt source.
*/
extern unsigned int mips_hpt_frequency;

/*
* The performance counter IRQ on MIPS is a close relative to the timer IRQ
* so it lives here.
*/
extern int (*perf_irq)(void);

/*
* Initialize the calling CPU's compare interrupt as clockevent device
*/
extern unsigned int __weak get_c0_compare_int(void);
extern int r4k_clockevent_init(void);
extern int smtc_clockevent_init(void);
extern int gic_clockevent_init(void);

static inline int mips_clockevent_init(void)
{
#ifdef CONFIG_MIPS_MT_SMTC
return smtc_clockevent_init();
#elif defined(CONFIG_CEVT_GIC)
return (gic_clockevent_init() | r4k_clockevent_init());
#elif defined(CONFIG_CEVT_R4K)
return r4k_clockevent_init();
#else
return -ENXIO;
#endif
}

/*
* Initialize the count register as a clocksource
*/
extern int init_r4k_clocksource(void);

static inline int init_mips_clocksource(void)
{
#ifdef CONFIG_CSRC_R4K
return init_r4k_clocksource();
#else
return 0;
#endif
}

static inline void clockevent_set_clock(struct clock_event_device *cd,
unsigned int clock)
{
clockevents_calc_mult_shift(cd, clock, 4);
}

#endif /* _ASM_TIME_H */