2 * Copyright (C) 2001, 2002, MontaVista Software Inc.
3 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
5 * include/asm-mips/time.h
6 * header file for the new style time.c file and time services.
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
13 * Please refer to Documentation/mips/time.README.
18 #include <linux/interrupt.h>
19 #include <linux/linkage.h>
20 #include <linux/ptrace.h>
21 #include <linux/rtc.h>
24 * RTC ops. By default, they point a no-RTC functions.
25 * rtc_get_time - mktime(year, mon, day, hour, min, sec) in seconds.
26 * rtc_set_time - reverse the above translation and set time to RTC.
28 extern unsigned long (*rtc_get_time)(void);
29 extern int (*rtc_set_time)(unsigned long);
32 * to_tm() converts system time back to (year, mon, day, hour, min, sec).
33 * It is intended to help implement rtc_set_time() functions.
34 * Copied from PPC implementation.
36 extern void to_tm(unsigned long tim, struct rtc_time * tm);
39 * do_gettimeoffset(). By default, this func pointer points to
40 * do_null_gettimeoffset(), which leads to the same resolution as HZ.
41 * Higher resolution versions are vailable, which gives ~1us resolution.
43 extern unsigned long (*do_gettimeoffset)(void);
45 extern unsigned long null_gettimeoffset(void);
46 extern unsigned long fixed_rate_gettimeoffset(void);
47 extern unsigned long calibrate_div32_gettimeoffset(void);
48 extern unsigned long calibrate_div64_gettimeoffset(void);
51 * high-level timer interrupt routines.
53 extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
56 * the corresponding low-level timer interrupt routine.
58 asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs);
61 * profiling and process accouting is done separately in local_timer_interrupt
63 void local_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
64 asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs);
67 * board specific routines required by time_init().
68 * board_time_init is defaulted to NULL and can remains so.
69 * board_timer_setup must be setup properly in machine setup routine.
72 extern void (*board_time_init)(void);
73 extern void (*board_timer_setup)(struct irqaction *irq);
76 * mips_counter_frequency - must be set if you intend to use
77 * counter as timer interrupt source or use fixed_rate_gettimeoffset.
79 extern unsigned int mips_counter_frequency;
81 #endif /* _ASM_TIME_H */