137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
/* $NetBSD: uba_ibus.c,v 1.1 1999/08/07 10:36:47 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/device.h>
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#include <sys/systm.h>
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#define _VAX_BUS_DMA_PRIVATE
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#include <machine/bus.h>
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#include <machine/mtpr.h>
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#include <machine/nexus.h>
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#include <machine/cpu.h>
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#include <machine/sgmap.h>
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#include <dev/qbus/ubavar.h>
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#include <arch/vax/uba/uba_common.h>
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/* Some Qbus-specific defines */
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#define QBASIZE (8192 * VAX_NBPG)
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#define QBAMAP 0x20088000
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#define QIOPAGE 0x20000000
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/*
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* The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems.
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* It has an address space of 4MB (22 address bits), therefore the name,
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* and is hardware compatible with all 16 and 18 bits Q-bus devices.
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*/
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static int qba_match __P((struct device *, struct cfdata *, void *));
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static void qba_attach __P((struct device *, struct device *, void *));
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static void qba_beforescan __P((struct uba_softc*));
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static void qba_init __P((struct uba_softc*));
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struct cfattach uba_ibus_ca = {
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sizeof(struct uba_vsoftc), qba_match, qba_attach
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};
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extern struct vax_bus_space vax_mem_bus_space;
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int
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qba_match(parent, vcf, aux)
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struct device *parent;
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struct cfdata *vcf;
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void *aux;
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{
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struct bp_conf *bp = aux;
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if (strcmp(bp->type, "uba"))
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return 0;
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return 1;
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}
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void
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qba_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct uba_vsoftc *sc = (void *)self;
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printf(": Q22\n");
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/*
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* Fill in bus specific data.
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*/
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sc->uv_sc.uh_beforescan = qba_beforescan;
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sc->uv_sc.uh_ubainit = qba_init;
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sc->uv_sc.uh_iot = &vax_mem_bus_space;
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sc->uv_sc.uh_dmat = &sc->uv_dmat;
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/*
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* Fill in variables used by the sgmap system.
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*/
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sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */
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sc->uv_addr = QBAMAP; /* Physical address of map registers */
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uba_dma_init(sc);
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uba_attach(&sc->uv_sc, QIOPAGE);
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}
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/*
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* Called when the QBA is set up; to enable DMA access from
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* QBA devices to main memory.
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*/
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void
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qba_beforescan(sc)
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struct uba_softc *sc;
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{
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#define QIPCR 0x1f40
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#define Q_LMEAE 0x20
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bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE);
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}
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void
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qba_init(sc)
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struct uba_softc *sc;
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{
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mtpr(0, PR_IUR);
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DELAY(500000);
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qba_beforescan(sc);
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}
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