148 lines
4.1 KiB
C
148 lines
4.1 KiB
C
/* $NetBSD: gbus.c,v 1.9 1999/04/10 01:21:38 cgd Exp $ */
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/*
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* Copyright (c) 1997 by Matthew Jacob
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* NASA AMES Research Center.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Autoconfiguration and support routines for the Gbus: the internal
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* bus on AlphaServer CPU modules.
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*/
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#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
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__KERNEL_RCSID(0, "$NetBSD: gbus.c,v 1.9 1999/04/10 01:21:38 cgd Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <machine/rpb.h>
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#include <machine/pte.h>
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#include <alpha/tlsb/gbusreg.h>
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#include <alpha/tlsb/gbusvar.h>
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#include <alpha/tlsb/tlsbreg.h>
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#include <alpha/tlsb/tlsbvar.h>
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#include "locators.h"
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#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
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struct gbus_softc {
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struct device sc_dev;
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int sc_tlsbnode; /* node on the TurboLaser */
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};
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static int gbusmatch __P((struct device *, struct cfdata *, void *));
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static void gbusattach __P((struct device *, struct device *, void *));
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struct cfattach gbus_ca = {
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sizeof(struct gbus_softc), gbusmatch, gbusattach
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};
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static int gbusprint __P((void *, const char *));
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static int gbussubmatch __P((struct device *, struct cfdata *, void *));
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struct gbus_attach_args gbus_children[] = {
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{ "zsc", GBUS_DUART0_OFFSET },
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{ "zsc", GBUS_DUART1_OFFSET },
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{ "mcclock", GBUS_CLOCK_OFFSET },
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{ NULL, 0 },
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};
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static int
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gbusprint(aux, pnp)
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void *aux;
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const char *pnp;
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{
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struct gbus_attach_args *ga = aux;
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if (pnp)
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printf("%s at %s", ga->ga_name, pnp);
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printf(" offset 0x%lx", ga->ga_offset);
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return (UNCONF);
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}
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static int
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gbusmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct tlsb_dev_attach_args *ta = aux;
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extern struct cfdriver tlsb_cd;
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/*
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* Make sure we're looking for a Gbus.
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* Right now, only Gbus could be a
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* child of a TLSB CPU Node.
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*/
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if (TLDEV_ISCPU(ta->ta_dtype) &&
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parent->dv_cfdata->cf_driver == &tlsb_cd)
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return (1);
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return (0);
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}
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static void
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gbusattach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct gbus_softc *sc = (struct gbus_softc *)self;
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struct tlsb_dev_attach_args *ta = aux;
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struct gbus_attach_args *ga;
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printf("\n");
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sc->sc_tlsbnode = ta->ta_node;
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/* Attach the children. */
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for (ga = gbus_children; ga->ga_name != NULL; ga++)
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(void) config_found_sm(self, ga, gbusprint, gbussubmatch);
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}
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static int
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gbussubmatch(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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struct gbus_attach_args *ga = aux;
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if (cf->cf_loc[GBUSCF_OFFSET] != GBUSCF_OFFSET_DEFAULT &&
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cf->cf_loc[GBUSCF_OFFSET] != ga->ga_offset)
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return (0);
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return ((*cf->cf_attach->ca_match)(parent, cf, aux));
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}
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