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>
25 extern spinlock_t rtc_lock;
28 * RTC ops. By default, they point to no-RTC functions.
29 * rtc_mips_get_time - mktime(year, mon, day, hour, min, sec) in seconds.
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 unsigned long (*rtc_mips_get_time)(void);
35 extern int (*rtc_mips_set_time)(unsigned long);
36 extern int (*rtc_mips_set_mmss)(unsigned long);
39 * Timer interrupt functions.
40 * mips_timer_state is needed for high precision timer calibration.
41 * mips_timer_ack may be NULL if the interrupt is self-recoverable.
43 extern int (*mips_timer_state)(void);
44 extern void (*mips_timer_ack)(void);
47 * High precision timer functions.
48 * If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted.
50 extern unsigned int (*mips_hpt_read)(void);
51 extern unsigned int mips_hpt_mask;
54 * to_tm() converts system time back to (year, mon, day, hour, min, sec).
55 * It is intended to help implement rtc_set_time() functions.
56 * Copied from PPC implementation.
58 extern void to_tm(unsigned long tim, struct rtc_time *tm);
61 * high-level timer interrupt routines.
63 extern irqreturn_t timer_interrupt(int irq, void *dev_id);
66 * the corresponding low-level timer interrupt routine.
68 extern asmlinkage void ll_timer_interrupt(int irq);
71 * profiling and process accouting is done separately in local_timer_interrupt
73 extern void local_timer_interrupt(int irq, void *dev_id);
74 extern asmlinkage void ll_local_timer_interrupt(int irq);
77 * board specific routines required by time_init().
78 * board_time_init is defaulted to NULL and can remain so.
79 * plat_timer_setup must be setup properly in machine setup routine.
82 extern void (*board_time_init)(void);
83 extern void plat_timer_setup(struct irqaction *irq);
86 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
87 * counter as a timer interrupt source; otherwise it can be set up
88 * automagically with an aid of mips_timer_state.
90 extern unsigned int mips_hpt_frequency;
92 #endif /* _ASM_TIME_H */