[net-next-2.6.git] / include / asm-mips / time.h

/*
 * Copyright (C) 2001, 2002, MontaVista Software Inc.
 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
 * Copyright (c) 2003  Maciej W. Rozycki
 *
 * 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/interrupt.h>
#include <linux/linkage.h>
#include <linux/ptrace.h>
#include <linux/rtc.h>
#include <linux/spinlock.h>

extern spinlock_t rtc_lock;

/*
 * RTC ops.  By default, they point to no-RTC functions.
 *	rtc_mips_get_time - mktime(year, mon, day, hour, min, sec) in seconds.
 *	rtc_mips_set_time - reverse the above translation and set time to RTC.
 *	rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need
 *			to be set.  Used by RTC sync-up.
 */
extern unsigned long (*rtc_mips_get_time)(void);
extern int (*rtc_mips_set_time)(unsigned long);
extern int (*rtc_mips_set_mmss)(unsigned long);

/*
 * Timer interrupt functions.
 * mips_timer_state is needed for high precision timer calibration.
 * mips_timer_ack may be NULL if the interrupt is self-recoverable.
 */
extern int (*mips_timer_state)(void);
extern void (*mips_timer_ack)(void);

/*
 * High precision timer functions.
 * If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted.
 */
extern unsigned int (*mips_hpt_read)(void);
extern void (*mips_hpt_init)(unsigned int);

/*
 * 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 available, which give ~1us resolution.
 */
extern unsigned long (*do_gettimeoffset)(void);

/*
 * high-level timer interrupt routines.
 */
extern irqreturn_t timer_interrupt(int irq, void *dev_id);

/*
 * the corresponding low-level timer interrupt routine.
 */
extern asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs);

/*
 * profiling and process accouting is done separately in local_timer_interrupt
 */
extern void local_timer_interrupt(int irq, void *dev_id);
extern asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs);

/*
 * board specific routines required by time_init().
 * board_time_init is defaulted to NULL and can remain so.
 * plat_timer_setup must be setup properly in machine setup routine.
 */
struct irqaction;
extern void (*board_time_init)(void);
extern void plat_timer_setup(struct irqaction *irq);

/*
 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
 * counter as a timer interrupt source; otherwise it can be set up
 * automagically with an aid of mips_timer_state.
 */
extern unsigned int mips_hpt_frequency;

#endif /* _ASM_TIME_H */
Commit	Line	Data
1da177e4 LT	1	/*
	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
	5	*
	6	* include/asm-mips/time.h
	7	* header file for the new style time.c file and time services.
	8	*
	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.
	13	*
	14	* Please refer to Documentation/mips/time.README.
	15	*/
	16	#ifndef _ASM_TIME_H
	17	#define _ASM_TIME_H
	18
	19	#include <linux/interrupt.h>
	20	#include <linux/linkage.h>
	21	#include <linux/ptrace.h>
	22	#include <linux/rtc.h>
53c2df2f AN	23	#include <linux/spinlock.h>
	24
	25	extern spinlock_t rtc_lock;
1da177e4 LT	26
	27	/*
	28	* RTC ops. By default, they point to no-RTC functions.
d23ee8fe YY	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
1da177e4 LT	32	* to be set. Used by RTC sync-up.
1da177e4 LT	33	*/
d23ee8fe YY	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);
1da177e4 LT	37
	38	/*
	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.
	42	*/
	43	extern int (*mips_timer_state)(void);
	44	extern void (*mips_timer_ack)(void);
	45
	46	/*
	47	* High precision timer functions.
	48	* If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted.
	49	*/
	50	extern unsigned int (*mips_hpt_read)(void);
	51	extern void (*mips_hpt_init)(unsigned int);
	52
	53	/*
	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.
	57	*/
	58	extern void to_tm(unsigned long tim, struct rtc_time *tm);
	59
	60	/*
	61	* do_gettimeoffset(). By default, this func pointer points to
	62	* do_null_gettimeoffset(), which leads to the same resolution as HZ.
	63	* Higher resolution versions are available, which give ~1us resolution.
	64	*/
	65	extern unsigned long (*do_gettimeoffset)(void);
	66
	67	/*
	68	* high-level timer interrupt routines.
	69	*/
7d12e780	70	extern irqreturn_t timer_interrupt(int irq, void *dev_id);
1da177e4 LT	71
	72	/*
	73	* the corresponding low-level timer interrupt routine.
	74	*/
	75	extern asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs);
	76
	77	/*
	78	* profiling and process accouting is done separately in local_timer_interrupt
	79	*/
7d12e780	80	extern void local_timer_interrupt(int irq, void *dev_id);
1da177e4 LT	81	extern asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs);
	82
	83	/*
	84	* board specific routines required by time_init().
	85	* board_time_init is defaulted to NULL and can remain so.
54d0a216	86	* plat_timer_setup must be setup properly in machine setup routine.
1da177e4 LT	87	*/
	88	struct irqaction;
	89	extern void (*board_time_init)(void);
54d0a216	90	extern void plat_timer_setup(struct irqaction *irq);
1da177e4 LT	91
	92	/*
	93	* mips_hpt_frequency - must be set if you intend to use an R4k-compatible
	94	* counter as a timer interrupt source; otherwise it can be set up
	95	* automagically with an aid of mips_timer_state.
	96	*/
	97	extern unsigned int mips_hpt_frequency;
	98
	99	#endif /* _ASM_TIME_H */