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
6 * include/asm-mips/time.h
7 * header file for the new style time.c file and time services.
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.
17 #include <linux/rtc.h>
18 #include <linux/spinlock.h>
19 #include <linux/clockchips.h>
20 #include <linux/clocksource.h>
22 extern spinlock_t rtc_lock;
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.
30 extern int rtc_mips_set_time(unsigned long);
31 extern int rtc_mips_set_mmss(unsigned long);
34 * board specific routines required by time_init().
36 extern void plat_time_init(void);
39 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
40 * counter as a timer interrupt source.
42 extern unsigned int mips_hpt_frequency;
45 * The performance counter IRQ on MIPS is a close relative to the timer IRQ
48 extern int (*perf_irq)(void);
51 * Initialize the calling CPU's compare interrupt as clockevent device
53 extern unsigned int __weak get_c0_compare_int(void);
54 extern int r4k_clockevent_init(void);
56 static inline int mips_clockevent_init(void)
58 #ifdef CONFIG_MIPS_MT_SMTC
59 extern int smtc_clockevent_init(void);
61 return smtc_clockevent_init();
62 #elif defined(CONFIG_CEVT_R4K)
63 return r4k_clockevent_init();
70 * Initialize the count register as a clocksource
72 #ifdef CONFIG_CSRC_R4K
73 extern int init_r4k_clocksource(void);
76 static inline int init_mips_clocksource(void)
78 #ifdef CONFIG_CSRC_R4K
79 return init_r4k_clocksource();
85 static inline void clockevent_set_clock(struct clock_event_device *cd,
88 clockevents_calc_mult_shift(cd, clock, 4);
91 #endif /* _ASM_TIME_H */