NetBSD/sys/arch/alpha/tlsb/gbus.c

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1998-05-14 02:13:35 +04:00
/* $NetBSD: gbus.c,v 1.8 1998/05/13 22:13:35 thorpej Exp $ */
/*
* Copyright (c) 1997 by Matthew Jacob
* NASA AMES Research Center.
* All rights reserved.
*
* 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 immediately at the beginning of the file, without modification,
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
/*
* Autoconfiguration and support routines for the Gbus: the internal
* bus on AlphaServer CPU modules.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: gbus.c,v 1.8 1998/05/13 22:13:35 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/rpb.h>
#include <machine/pte.h>
#include <alpha/tlsb/gbusreg.h>
#include <alpha/tlsb/gbusvar.h>
#include <alpha/tlsb/tlsbreg.h>
#include <alpha/tlsb/tlsbvar.h>
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#include "locators.h"
extern int cputype;
#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
struct gbus_softc {
struct device sc_dev;
int sc_tlsbnode; /* node on the TurboLaser */
};
static int gbusmatch __P((struct device *, struct cfdata *, void *));
static void gbusattach __P((struct device *, struct device *, void *));
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struct cfattach gbus_ca = {
sizeof(struct gbus_softc), gbusmatch, gbusattach
};
static int gbusprint __P((void *, const char *));
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static int gbussubmatch __P((struct device *, struct cfdata *, void *));
struct gbus_attach_args gbus_children[] = {
{ "zsc", GBUS_DUART0_OFFSET },
{ "zsc", GBUS_DUART1_OFFSET },
{ "mcclock", GBUS_CLOCK_OFFSET },
{ NULL, 0 },
};
static int
gbusprint(aux, pnp)
void *aux;
const char *pnp;
{
struct gbus_attach_args *ga = aux;
if (pnp)
printf("%s at %s", ga->ga_name, pnp);
printf(" offset 0x%lx", ga->ga_offset);
return (UNCONF);
}
static int
gbusmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct tlsb_dev_attach_args *ta = aux;
extern struct cfdriver tlsb_cd;
/*
* Make sure we're looking for a Gbus.
* Right now, only Gbus could be a
* child of a TLSB CPU Node.
*/
if (TLDEV_ISCPU(ta->ta_dtype) &&
parent->dv_cfdata->cf_driver == &tlsb_cd)
return (1);
return (0);
}
static void
gbusattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct gbus_softc *sc = (struct gbus_softc *)self;
struct tlsb_dev_attach_args *ta = aux;
struct gbus_attach_args *ga;
printf("\n");
sc->sc_tlsbnode = ta->ta_node;
/* Attach the children. */
for (ga = gbus_children; ga->ga_name != NULL; ga++)
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(void) config_found_sm(self, ga, gbusprint, gbussubmatch);
}
static int
gbussubmatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct gbus_attach_args *ga = aux;
if (cf->cf_loc[GBUSCF_OFFSET] != GBUSCF_OFFSET_DEFAULT &&
cf->cf_loc[GBUSCF_OFFSET] != ga->ga_offset)
return (0);
return ((*cf->cf_attach->ca_match)(parent, cf, aux));
}