time.h
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上传日期:2013-02-24
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- /*
- * Copyright 2001 MontaVista Software Inc.
- * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
- *
- * include/asm-mips/time.h
- * header file for the new style time.c file and time services.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- */
- /*
- * Please refer to Documentation/MIPS/time.README.
- */
- #ifndef _ASM_TIME_H
- #define _ASM_TIME_H
- #include <linux/ptrace.h> /* for struct pt_regs */
- #include <linux/linkage.h> /* for asmlinkage */
- #include <linux/rtc.h> /* for struct rtc_time */
- /*
- * RTC ops. By default, they point a no-RTC functions.
- * rtc_get_time - mktime(year, mon, day, hour, min, sec) in seconds.
- * rtc_set_time - reverse the above translation and set time to RTC.
- */
- extern unsigned long (*rtc_get_time)(void);
- extern int (*rtc_set_time)(unsigned long);
- /*
- * to_tm() converts system time back to (year, mon, day, hour, min, sec).
- * It is intended to help implement rtc_set_time() functions.
- * Copied from PPC implementation.
- */
- extern void to_tm(unsigned long tim, struct rtc_time * tm);
- /*
- * do_gettimeoffset(). By default, this func pointer points to
- * do_null_gettimeoffset(), which leads to the same resolution as HZ.
- * Higher resolution versions are vailable, which gives ~1us resolution.
- */
- extern unsigned long (*do_gettimeoffset)(void);
- extern unsigned long null_gettimeoffset(void);
- extern unsigned long fixed_rate_gettimeoffset(void);
- extern unsigned long calibrate_div32_gettimeoffset(void);
- extern unsigned long calibrate_div64_gettimeoffset(void);
- /*
- * high-level timer interrupt routines.
- */
- extern void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs);
- /*
- * the corresponding low-level timer interrupt routine.
- */
- asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs);
- /*
- * board specific routines required by time_init().
- * board_time_init is defaulted to NULL and can remains so.
- * board_timer_setup must be setup properly in machine setup routine.
- */
- struct irqaction;
- extern void (*board_time_init)(void);
- extern void (*board_timer_setup)(struct irqaction *irq);
- /*
- * mips_counter_frequency - must be set if you intend to use
- * counter as timer interrupt source or use fixed_rate_gettimeoffset.
- */
- extern unsigned int mips_counter_frequency;
- #endif /* _ASM_TIME_H */