diff options
Diffstat (limited to 'sys/arch/vax/uba/uba_mainbus.c')
| -rw-r--r-- | sys/arch/vax/uba/uba_mainbus.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/sys/arch/vax/uba/uba_mainbus.c b/sys/arch/vax/uba/uba_mainbus.c new file mode 100644 index 00000000000..c5f6daa57bd --- /dev/null +++ b/sys/arch/vax/uba/uba_mainbus.c @@ -0,0 +1,137 @@ +/* $OpenBSD: uba_mainbus.c,v 1.1 2000/04/27 03:14:51 bjc Exp $ */ +/* $NetBSD: uba_mainbus.c,v 1.2 1999/06/06 19:00:53 ragge Exp $ */ +/* + * Copyright (c) 1996 Jonathan Stone. + * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. + * Copyright (c) 1982, 1986 The Regents of the University of California. + * 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, 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. + * + * @(#)uba.c 7.10 (Berkeley) 12/16/90 + * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 + */ + +#include <sys/param.h> +#include <sys/device.h> +#include <sys/systm.h> + +#define _VAX_BUS_DMA_PRIVATE +#include <machine/bus.h> +#include <machine/mtpr.h> +#include <machine/nexus.h> +#include <machine/cpu.h> +#include <machine/sgmap.h> + +#include <arch/vax/qbus/ubavar.h> + +#include <arch/vax/uba/uba_common.h> + +/* Some Qbus-specific defines */ +#define QBASIZE (8192 * VAX_NBPG) +#define QBAMAP 0x20088000 +#define QIOPAGE 0x20000000 + +/* + * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems. + * It has an address space of 4MB (22 address bits), therefore the name, + * and is hardware compatible with all 16 and 18 bits Q-bus devices. + */ +static int qba_match __P((struct device *, struct cfdata *, void *)); +static void qba_attach __P((struct device *, struct device *, void *)); +static void qba_beforescan __P((struct uba_softc*)); +static void qba_init __P((struct uba_softc*)); + +struct cfattach uba_mainbus_ca = { + sizeof(struct uba_vsoftc), qba_match, qba_attach +}; + +extern struct vax_bus_space vax_mem_bus_space; + +int +qba_match(parent, vcf, aux) + struct device *parent; + struct cfdata *vcf; + void *aux; +{ + struct bp_conf *bp = aux; + + if (strcmp(bp->type, "uba")) + return 0; + + return 1; +} + +void +qba_attach(parent, self, aux) + struct device *parent, *self; + void *aux; +{ + struct uba_vsoftc *sc = (void *)self; + + printf(": Q22\n"); + /* + * Fill in bus specific data. + */ + sc->uv_sc.uh_beforescan = qba_beforescan; + sc->uv_sc.uh_ubainit = qba_init; + sc->uv_sc.uh_iot = &vax_mem_bus_space; + sc->uv_sc.uh_dmat = &sc->uv_dmat; + + /* + * Fill in variables used by the sgmap system. + */ + sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */ + sc->uv_addr = QBAMAP; /* Physical address of map registers */ + + uba_dma_init(sc); + uba_attach(&sc->uv_sc, QIOPAGE); +} + +/* + * Called when the QBA is set up; to enable DMA access from + * QBA devices to main memory. + */ +void +qba_beforescan(sc) + struct uba_softc *sc; +{ +#define QIPCR 0x1f40 +#define Q_LMEAE 0x20 + bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE); +} + +void +qba_init(sc) + struct uba_softc *sc; +{ + mtpr(0, PR_IUR); + DELAY(500000); + qba_beforescan(sc); +} |