2005-04-17 06:20:36 +08:00
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/*
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* Copyright (C) 2001, 2002, MontaVista Software Inc.
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* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
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* Copyright (c) 2003 Maciej W. Rozycki
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*
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* include/asm-mips/time.h
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* header file for the new style time.c file and time services.
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*
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2013-01-22 19:59:30 +08:00
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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2005-04-17 06:20:36 +08:00
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef _ASM_TIME_H
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#define _ASM_TIME_H
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#include <linux/rtc.h>
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2005-11-03 00:01:15 +08:00
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#include <linux/spinlock.h>
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2007-10-19 15:13:08 +08:00
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#include <linux/clockchips.h>
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2006-11-11 23:10:28 +08:00
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#include <linux/clocksource.h>
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2005-11-03 00:01:15 +08:00
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extern spinlock_t rtc_lock;
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2005-04-17 06:20:36 +08:00
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/*
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2007-10-12 06:46:08 +08:00
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* RTC ops. By default, they point to weak no-op RTC functions.
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2006-03-27 17:16:33 +08:00
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* rtc_mips_set_time - reverse the above translation and set time to RTC.
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* rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need
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2005-04-17 06:20:36 +08:00
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* to be set. Used by RTC sync-up.
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*/
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2007-10-12 06:46:08 +08:00
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extern int rtc_mips_set_time(unsigned long);
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extern int rtc_mips_set_mmss(unsigned long);
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2005-04-17 06:20:36 +08:00
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/*
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* board specific routines required by time_init().
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*/
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2007-10-12 06:46:08 +08:00
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extern void plat_time_init(void);
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2005-04-17 06:20:36 +08:00
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/*
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* mips_hpt_frequency - must be set if you intend to use an R4k-compatible
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2007-12-09 20:19:36 +08:00
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* counter as a timer interrupt source.
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2005-04-17 06:20:36 +08:00
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*/
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extern unsigned int mips_hpt_frequency;
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2007-10-12 06:46:09 +08:00
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/*
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* The performance counter IRQ on MIPS is a close relative to the timer IRQ
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* so it lives here.
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*/
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extern int (*perf_irq)(void);
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2014-09-19 05:47:12 +08:00
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extern int __weak get_c0_perfcount_int(void);
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2007-10-12 06:46:09 +08:00
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2007-10-12 06:46:09 +08:00
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/*
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* Initialize the calling CPU's compare interrupt as clockevent device
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*/
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2015-07-13 07:11:38 +08:00
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extern unsigned int get_c0_compare_int(void);
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2008-12-21 16:26:22 +08:00
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extern int r4k_clockevent_init(void);
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2007-11-22 00:39:44 +08:00
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static inline int mips_clockevent_init(void)
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2007-10-19 00:48:11 +08:00
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{
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2014-10-21 03:04:04 +08:00
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#ifdef CONFIG_CEVT_R4K
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2008-12-21 16:26:22 +08:00
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return r4k_clockevent_init();
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#else
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2007-11-22 00:39:44 +08:00
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return -ENXIO;
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2007-10-19 00:48:11 +08:00
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#endif
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2008-12-21 16:26:22 +08:00
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}
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2007-10-12 06:46:09 +08:00
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2007-11-25 06:33:28 +08:00
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/*
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* Initialize the count register as a clocksource
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*/
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2008-12-21 16:26:22 +08:00
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extern int init_r4k_clocksource(void);
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2008-03-12 21:58:10 +08:00
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static inline int init_mips_clocksource(void)
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2007-11-25 06:33:28 +08:00
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{
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2013-10-07 18:32:54 +08:00
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#ifdef CONFIG_CSRC_R4K
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2008-12-21 16:26:22 +08:00
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return init_r4k_clocksource();
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#else
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2008-03-12 21:58:10 +08:00
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return 0;
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2007-11-25 06:33:28 +08:00
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#endif
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2008-12-21 16:26:22 +08:00
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}
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2007-11-25 06:33:28 +08:00
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2009-11-11 22:05:34 +08:00
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static inline void clockevent_set_clock(struct clock_event_device *cd,
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unsigned int clock)
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{
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clockevents_calc_mult_shift(cd, clock, 4);
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}
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2007-10-19 15:13:08 +08:00
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2005-04-17 06:20:36 +08:00
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#endif /* _ASM_TIME_H */
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