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1/*
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.
13 */
14#ifndef _ASM_TIME_H
15#define _ASM_TIME_H
16
17#include <linux/rtc.h>
18#include <linux/spinlock.h>
19#include <linux/clockchips.h>
20#include <linux/clocksource.h>
21
22extern spinlock_t rtc_lock;
23
24/*
25 * RTC ops. By default, they point to weak no-op RTC functions.
26 * 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
28 * to be set. Used by RTC sync-up.
29 */
30extern int rtc_mips_set_time(unsigned long);
31extern int rtc_mips_set_mmss(unsigned long);
32
33/*
34 * Timer interrupt functions.
35 * mips_timer_state is needed for high precision timer calibration.
36 */
37extern int (*mips_timer_state)(void);
38
39/*
40 * board specific routines required by time_init().
41 */
42extern void plat_time_init(void);
43
44/*
45 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
46 * counter as a timer interrupt source; otherwise it can be set up
47 * automagically with an aid of mips_timer_state.
48 */
49extern unsigned int mips_hpt_frequency;
50
51/*
52 * The performance counter IRQ on MIPS is a close relative to the timer IRQ
53 * so it lives here.
54 */
55extern int (*perf_irq)(void);
56
57/*
58 * Initialize the calling CPU's compare interrupt as clockevent device
59 */
60#ifdef CONFIG_CEVT_R4K
61extern int mips_clockevent_init(void);
62extern unsigned int __weak get_c0_compare_int(void);
63#else
64static inline int mips_clockevent_init(void)
65{
66 return -ENXIO;
67}
68#endif
69
70/*
71 * Initialize the count register as a clocksource
72 */
73#ifdef CONFIG_CEVT_R4K
74extern void init_mips_clocksource(void);
75#else
76static inline void init_mips_clocksource(void)
77{
78}
79#endif
80
81extern void clocksource_set_clock(struct clocksource *cs, unsigned int clock);
82extern void clockevent_set_clock(struct clock_event_device *cd,
83 unsigned int clock);
84
85#endif /* _ASM_TIME_H */