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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 2001, 2002, MontaVista Software Inc.
3 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
4 * Copyright (c) 2003 Maciej W. Rozycki
5 *
6 * include/asm-mips/time.h
7 * header file for the new style time.c file and time services.
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 */
14#ifndef _ASM_TIME_H
15#define _ASM_TIME_H
16
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/rtc.h>
Atsushi Nemoto53c2df22005-11-03 01:01:15 +090018#include <linux/spinlock.h>
Ralf Baechle93c846f2007-10-19 08:13:08 +010019#include <linux/clockchips.h>
Atsushi Nemoto00598562006-11-12 00:10:28 +090020#include <linux/clocksource.h>
Atsushi Nemoto53c2df22005-11-03 01:01:15 +090021
22extern spinlock_t rtc_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070023
24/*
Ralf Baechle4b550482007-10-11 23:46:08 +010025 * RTC ops. By default, they point to weak no-op RTC functions.
Yoichi Yuasad23ee8f2006-03-27 01:16:33 -080026 * rtc_mips_set_time - reverse the above translation and set time to RTC.
27 * rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 * to be set. Used by RTC sync-up.
29 */
Ralf Baechle4b550482007-10-11 23:46:08 +010030extern int rtc_mips_set_time(unsigned long);
31extern int rtc_mips_set_mmss(unsigned long);
Linus Torvalds1da177e2005-04-16 15:20:36 -070032
33/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 * board specific routines required by time_init().
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 */
Ralf Baechle4b550482007-10-11 23:46:08 +010036extern void plat_time_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070037
38/*
39 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
Yoichi Yuasac9662342007-12-09 21:19:36 +090040 * counter as a timer interrupt source.
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 */
42extern unsigned int mips_hpt_frequency;
43
Ralf Baechle91a2fcc2007-10-11 23:46:09 +010044/*
45 * The performance counter IRQ on MIPS is a close relative to the timer IRQ
46 * so it lives here.
47 */
48extern int (*perf_irq)(void);
49
Ralf Baechle7bcf7712007-10-11 23:46:09 +010050/*
51 * Initialize the calling CPU's compare interrupt as clockevent device
52 */
Ralf Baechle42f77542007-10-18 17:48:11 +010053#ifdef CONFIG_CEVT_R4K
Ralf Baechle5aa85c92007-11-21 16:39:44 +000054extern int mips_clockevent_init(void);
Ralf Baechle38760d42007-10-29 14:23:43 +000055extern unsigned int __weak get_c0_compare_int(void);
Ralf Baechle42f77542007-10-18 17:48:11 +010056#else
Ralf Baechle5aa85c92007-11-21 16:39:44 +000057static inline int mips_clockevent_init(void)
Ralf Baechle42f77542007-10-18 17:48:11 +010058{
Ralf Baechle5aa85c92007-11-21 16:39:44 +000059 return -ENXIO;
Ralf Baechle42f77542007-10-18 17:48:11 +010060}
61#endif
Ralf Baechle7bcf7712007-10-11 23:46:09 +010062
Ralf Baechle940f6b42007-11-24 22:33:28 +000063/*
64 * Initialize the count register as a clocksource
65 */
66#ifdef CONFIG_CEVT_R4K
67extern void init_mips_clocksource(void);
68#else
69static inline void init_mips_clocksource(void)
70{
71}
72#endif
73
Ralf Baechle93c846f2007-10-19 08:13:08 +010074extern void clocksource_set_clock(struct clocksource *cs, unsigned int clock);
75extern void clockevent_set_clock(struct clock_event_device *cd,
76 unsigned int clock);
77
Linus Torvalds1da177e2005-04-16 15:20:36 -070078#endif /* _ASM_TIME_H */