/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* 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 .
*/
#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;
/*
* 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 );
extern int __weak get_c0_perfcount_int(void );
/*
* Initialize the calling CPU ' s compare interrupt as clockevent device
*/
extern unsigned int get_c0_compare_int(void );
extern int r4k_clockevent_init(void );
static inline int mips_clockevent_init(void )
{
#ifdef 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 __init 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 */
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