auxreg.c

早期freebsd实现

/*
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This software was developed by the Computer Systems Engineering group
 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
 * contributed to Berkeley.
 *
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Lawrence Berkeley Laboratory.
 *
 * 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 University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
 *
 *	@(#)auxreg.c	8.1 (Berkeley) 6/11/93
 *
 * from: $Header: auxreg.c,v 1.11 92/11/26 03:04:44 torek Exp $ (LBL)
 */

#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>

#include <machine/autoconf.h>

#include <sparc/sparc/vaddrs.h>
#include <sparc/sparc/auxreg.h>

static int auxregmatch __P((struct device *, struct cfdata *, void *));
static void auxregattach __P((struct device *, struct device *, void *));
struct cfdriver auxregcd =
    { 0, "auxreg", auxregmatch, auxregattach, DV_DULL, sizeof(struct device) };

#ifdef BLINK
static int
blink(zero)
	void *zero;
{
	register int s;
	register fixpt_t lav;

	s = splhigh();
	LED_FLIP;
	splx(s);
	/*
	 * Blink rate is:
	 *	full cycle every second if completely idle (loadav = 0)
	 *	full cycle every 2 seconds if loadav = 1
	 *	full cycle every 3 seconds if loadav = 2
	 * etc.
	 */
	s = (((averunnable[0] + FSCALE) * hz) >> (FSHIFT + 1));
	timeout(blink, (caddr_t)0, s);
}
#endif

/*
 * The OPENPROM calls this "auxiliary-io".
 */
static int
auxregmatch(parent, cf, aux)
	struct device *parent;
	struct cfdata *cf;
	void *aux;
{

	return (strcmp("auxiliary-io", ((struct romaux *)aux)->ra_name) == 0);
}

/* ARGSUSED */
static void
auxregattach(parent, self, aux)
	struct device *parent, *self;
	void *aux;
{
	struct romaux *ra = aux;

	(void)mapdev(ra->ra_paddr, AUXREG_VA, sizeof(long));
	printf("\n");
#ifdef BLINK
	blink((caddr_t)0);
#endif
}