249 lines
6.6 KiB
C
249 lines
6.6 KiB
C
/* $NetBSD: uba.c,v 1.48 1999/06/20 17:56:29 ragge Exp $ */
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/*
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* Copyright (c) 1996 Jonathan Stone.
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* Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
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* Copyright (c) 1982, 1986 The Regents of the University of California.
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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, 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR 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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* @(#)uba.c 7.10 (Berkeley) 12/16/90
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* @(#)autoconf.c 7.20 (Berkeley) 5/9/91
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*/
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/systm.h>
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#include <sys/map.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/conf.h>
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#include <sys/dkstat.h>
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#include <sys/kernel.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <machine/bus.h>
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#include <machine/scb.h>
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#include <machine/cpu.h>
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#include <dev/qbus/ubavar.h>
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#include "ioconf.h"
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static int ubasearch __P((struct device *, struct cfdata *, void *));
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static int ubaprint __P((void *, const char *));
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/*
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* If we failed to allocate uba resources, put us on a queue to wait
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* until there is available resources. Resources to compete about
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* are map registers and BDPs. This is normally only a problem on
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* Unibus systems, Qbus systems have more map registers than usable.
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*/
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void
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uba_enqueue(uu)
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struct uba_unit *uu;
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{
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struct uba_softc *uh;
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int s;
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uh = (void *)((struct device *)(uu->uu_softc))->dv_parent;
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s = splimp();
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SIMPLEQ_INSERT_TAIL(&uh->uh_resq, uu, uu_resq);
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splx(s);
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}
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/*
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* When a routine that uses resources is finished, the next device
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* in queue for map registers etc is called. If it succeeds to get
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* resources, call next, and next, and next...
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* This routine must be called at splimp.
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*/
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void
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uba_done(uh)
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struct uba_softc *uh;
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{
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struct uba_unit *uu;
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while ((uu = SIMPLEQ_FIRST(&uh->uh_resq))) {
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SIMPLEQ_REMOVE_HEAD(&uh->uh_resq, uu, uu_resq);
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if ((*uu->uu_ready)(uu) == 0) {
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SIMPLEQ_INSERT_HEAD(&uh->uh_resq, uu, uu_resq);
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break;
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}
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}
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}
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/*
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* Generate a reset on uba number uban. Then
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* call each device that asked to be called during attach,
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* giving it a chance to clean up so as to be able to continue.
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*/
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void
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ubareset(uban)
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int uban;
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{
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register struct uba_softc *uh = uba_cd.cd_devs[uban];
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int s, i;
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s = splimp();
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SIMPLEQ_INIT(&uh->uh_resq);
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printf("%s: reset", uh->uh_dev.dv_xname);
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(*uh->uh_ubainit)(uh);
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for (i = 0; i < uh->uh_resno; i++)
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(*uh->uh_reset[i])(uh->uh_resarg[i]);
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printf("\n");
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splx(s);
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}
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/*
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* The common attach routine:
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* Calls the scan routine to search for uba devices.
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*/
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void
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uba_attach(sc, iopagephys)
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struct uba_softc *sc;
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paddr_t iopagephys;
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{
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/*
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* Set last free interrupt vector for devices with
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* programmable interrupt vectors. Use is to decrement
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* this number and use result as interrupt vector.
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*/
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sc->uh_lastiv = 0x200;
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SIMPLEQ_INIT(&sc->uh_resq);
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/*
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* Allocate place for unibus I/O space in virtual space.
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*/
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if (bus_space_map(sc->uh_iot, iopagephys, UBAIOSIZE, 0, &sc->uh_ioh))
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return;
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if (sc->uh_beforescan)
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(*sc->uh_beforescan)(sc);
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/*
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* Now start searching for devices.
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*/
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config_search(ubasearch,(struct device *)sc, NULL);
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if (sc->uh_afterscan)
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(*sc->uh_afterscan)(sc);
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}
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int
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ubasearch(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 uba_softc *sc = (struct uba_softc *)parent;
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struct uba_attach_args ua;
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int i, vec, br;
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ua.ua_ioh = ubdevreg(cf->cf_loc[0]) + sc->uh_ioh;
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ua.ua_iot = sc->uh_iot;
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ua.ua_dmat = sc->uh_dmat;
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ua.ua_reset = NULL;
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if (badaddr((caddr_t)ua.ua_ioh, 2) ||
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(sc->uh_errchk ? (*sc->uh_errchk)(sc):0))
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goto forgetit;
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scb_vecref(0, 0); /* Clear vector ref */
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i = (*cf->cf_attach->ca_match) (parent, cf, &ua);
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if (sc->uh_errchk)
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if ((*sc->uh_errchk)(sc))
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goto forgetit;
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if (i == 0)
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goto forgetit;
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i = scb_vecref(&vec, &br);
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if (i == 0)
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goto fail;
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if (vec == 0)
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goto fail;
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scb_vecalloc(vec, ua.ua_ivec, cf->cf_unit, SCB_ISTACK);
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if (ua.ua_reset) { /* device wants ubareset */
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if (sc->uh_resno == 0) {
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#define RESETSIXE 128
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sc->uh_reset = malloc(sizeof(void *) * RESETSIXE,
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M_DEVBUF, M_NOWAIT);
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sc->uh_resarg = malloc(sizeof(void *) * RESETSIXE,
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M_DEVBUF, M_NOWAIT);
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}
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if (sc->uh_resno < RESETSIXE) {
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sc->uh_resarg[sc->uh_resno] = cf->cf_unit;
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sc->uh_reset[sc->uh_resno++] = ua.ua_reset;
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} else {
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printf("%s: Expand reset table, skipping reset %s%d\n",
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sc->uh_dev.dv_xname, cf->cf_driver->cd_name,
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cf->cf_unit);
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}
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}
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ua.ua_br = br;
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ua.ua_cvec = vec;
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ua.ua_iaddr = cf->cf_loc[0];
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config_attach(parent, cf, &ua, ubaprint);
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return 0;
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fail:
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printf("%s%d at %s csr %o %s\n",
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cf->cf_driver->cd_name, cf->cf_unit, parent->dv_xname,
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cf->cf_loc[0], (i ? "zero vector" : "didn't interrupt"));
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forgetit:
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return 0;
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}
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/*
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* Print out some interesting info common to all unibus devices.
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*/
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int
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ubaprint(aux, uba)
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void *aux;
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const char *uba;
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{
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struct uba_attach_args *ua = aux;
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printf(" csr %o vec %o ipl %x", ua->ua_iaddr,
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ua->ua_cvec & 511, ua->ua_br);
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return UNCONF;
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}
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