91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/* $NetBSD: clockvar.h,v 1.1 2002/02/12 20:38:41 scw Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996, 2002 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Jason R. Thorpe.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef _MVME_CLOCKVAR_H
|
|
#define _MVME_CLOCKVAR_H
|
|
|
|
#include <dev/clock_subr.h>
|
|
#include <dev/ic/mk48txxreg.h>
|
|
|
|
/*
|
|
* Defintions exported to ASIC-specific clock attachment.
|
|
*/
|
|
|
|
extern struct evcnt clock_profcnt;
|
|
extern struct evcnt clock_statcnt;
|
|
|
|
extern int clock_statvar;
|
|
extern int clock_statmin;
|
|
|
|
struct clock_attach_args {
|
|
void (*ca_initfunc) __P((void *, int, int));
|
|
long (*ca_microtime) __P((void *));
|
|
void *ca_arg;
|
|
};
|
|
|
|
void clock_config __P((struct device *, struct clock_attach_args *,
|
|
struct evcnt *));
|
|
|
|
void clock_rtc_config __P((todr_chip_handle_t));
|
|
|
|
/*
|
|
* Macro to compute a new randomized interval. The intervals are
|
|
* uniformly distributed on [statint - statvar / 2, statint + statvar / 2],
|
|
* and therefore have mean statint, giving a stathz frequency clock.
|
|
*
|
|
* This is gratuitously stolen from sparc/sparc/clock.c
|
|
*/
|
|
#define CLOCK_NEWINT(statvar, statmin) ({ \
|
|
u_long r, var = (statvar); \
|
|
do { r = random() & (var - 1); } while (r == 0); \
|
|
(statmin + r); \
|
|
})
|
|
|
|
/*
|
|
* Sun chose the year `68' as their base count, so that
|
|
* cl_year==0 means 1968.
|
|
*/
|
|
#define YEAR0 1968
|
|
|
|
/*
|
|
* interrupt level for clock
|
|
*/
|
|
#define CLOCK_LEVEL 5
|
|
|
|
#endif /* _MVME_CLOCKVAR_H */
|