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.
14 * Please refer to Documentation/mips/time.README.
19 #include <linux/interrupt.h>
20 #include <linux/linkage.h>
21 #include <linux/ptrace.h>
22 #include <linux/rtc.h>
23 #include <linux/spinlock.h>
24 #include <linux/clocksource.h>
26 extern spinlock_t rtc_lock;
29 * RTC ops. By default, they point to weak no-op RTC functions.
30 * rtc_mips_set_time - reverse the above translation and set time to RTC.
31 * rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need
32 * to be set. Used by RTC sync-up.
34 extern int rtc_mips_set_time(unsigned long);
35 extern int rtc_mips_set_mmss(unsigned long);
38 * Timer interrupt functions.
39 * mips_timer_state is needed for high precision timer calibration.
40 * mips_timer_ack may be NULL if the interrupt is self-recoverable.
42 extern int (*mips_timer_state)(void);
45 * High precision timer clocksource.
46 * If .read is NULL, an R4k-compatible timer setup is attempted.
48 extern struct clocksource clocksource_mips;
51 * profiling and process accouting is done separately in local_timer_interrupt
53 extern void local_timer_interrupt(int irq, void *dev_id);
56 * board specific routines required by time_init().
59 extern void plat_time_init(void);
60 extern void plat_timer_setup(struct irqaction *irq);
63 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
64 * counter as a timer interrupt source; otherwise it can be set up
65 * automagically with an aid of mips_timer_state.
67 extern unsigned int mips_hpt_frequency;
70 * The performance counter IRQ on MIPS is a close relative to the timer IRQ
73 extern int (*perf_irq)(void);
76 * Initialize the calling CPU's compare interrupt as clockevent device
78 extern void mips_clockevent_init(void);
80 #endif /* _ASM_TIME_H */