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Annotation of sys/arch/vax/uba/uba_ibus.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: uba_ibus.c,v 1.3 2003/06/02 23:27:58 millert Exp $    */
                      2: /*     $NetBSD: uba_ibus.c,v 1.1 1999/08/07 10:36:47 ragge Exp $          */
                      3: /*
                      4:  * Copyright (c) 1996 Jonathan Stone.
                      5:  * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden.
                      6:  * Copyright (c) 1982, 1986 The Regents of the University of California.
                      7:  * All rights reserved.
                      8:  *
                      9:  * Redistribution and use in source and binary forms, with or without
                     10:  * modification, are permitted provided that the following conditions
                     11:  * are met:
                     12:  * 1. Redistributions of source code must retain the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer.
                     14:  * 2. Redistributions in binary form must reproduce the above copyright
                     15:  *    notice, this list of conditions and the following disclaimer in the
                     16:  *    documentation and/or other materials provided with the distribution.
                     17:  * 3. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  *
                     33:  *     @(#)uba.c       7.10 (Berkeley) 12/16/90
                     34:  *     @(#)autoconf.c  7.20 (Berkeley) 5/9/91
                     35:  */
                     36:
                     37: #include <sys/param.h>
                     38: #include <sys/device.h>
                     39: #include <sys/systm.h>
                     40:
                     41: #define        _VAX_BUS_DMA_PRIVATE
                     42: #include <machine/bus.h>
                     43: #include <machine/mtpr.h>
                     44: #include <machine/nexus.h>
                     45: #include <machine/cpu.h>
                     46: #include <machine/sgmap.h>
                     47:
                     48: #include <arch/vax/qbus/ubavar.h>
                     49:
                     50: #include <arch/vax/uba/uba_common.h>
                     51:
                     52: /* Some Qbus-specific defines */
                     53: #define        QBASIZE (8192 * VAX_NBPG)
                     54: #define        QBAMAP  0x20088000
                     55: #define        QIOPAGE 0x20000000
                     56:
                     57: /*
                     58:  * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems.
                     59:  * It has an address space of 4MB (22 address bits), therefore the name,
                     60:  * and is hardware compatible with all 16 and 18 bits Q-bus devices.
                     61:  */
                     62: static int     qba_match(struct device *, struct cfdata *, void *);
                     63: static void    qba_attach(struct device *, struct device *, void *);
                     64: static void    qba_beforescan(struct uba_softc*);
                     65: static void    qba_init(struct uba_softc*);
                     66:
                     67: struct cfattach uba_ibus_ca = {
                     68:        sizeof(struct uba_vsoftc), (cfmatch_t)qba_match, qba_attach
                     69: };
                     70:
                     71: extern struct vax_bus_space vax_mem_bus_space;
                     72:
                     73: int
                     74: qba_match(parent, vcf, aux)
                     75:        struct device *parent;
                     76:        struct cfdata *vcf;
                     77:        void *aux;
                     78: {
                     79:        struct  bp_conf *bp = aux;
                     80:
                     81:        if (strcmp(bp->type, "uba"))
                     82:                return 0;
                     83:
                     84:        return 1;
                     85: }
                     86:
                     87: void
                     88: qba_attach(parent, self, aux)
                     89:        struct device *parent, *self;
                     90:        void *aux;
                     91: {
                     92:        struct uba_vsoftc *sc = (void *)self;
                     93:
                     94:        printf(": Q22\n");
                     95:        /*
                     96:         * Fill in bus specific data.
                     97:         */
                     98:        sc->uv_sc.uh_beforescan = qba_beforescan;
                     99:        sc->uv_sc.uh_ubainit = qba_init;
                    100:        sc->uv_sc.uh_iot = &vax_mem_bus_space;
                    101:        sc->uv_sc.uh_dmat = &sc->uv_dmat;
                    102:
                    103:        /*
                    104:         * Fill in variables used by the sgmap system.
                    105:         */
                    106:        sc->uv_size = QBASIZE;  /* Size in bytes of Qbus space */
                    107:        sc->uv_addr = QBAMAP;   /* Physical address of map registers */
                    108:
                    109:        uba_dma_init(sc);
                    110:        uba_attach(&sc->uv_sc, QIOPAGE);
                    111: }
                    112:
                    113: /*
                    114:  * Called when the QBA is set up; to enable DMA access from
                    115:  * QBA devices to main memory.
                    116:  */
                    117: void
                    118: qba_beforescan(sc)
                    119:        struct uba_softc *sc;
                    120: {
                    121: #define        QIPCR   0x1f40
                    122: #define        Q_LMEAE 0x20
                    123:        bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE);
                    124: }
                    125:
                    126: void
                    127: qba_init(sc)
                    128:        struct uba_softc *sc;
                    129: {
                    130:        mtpr(0, PR_IUR);
                    131:        DELAY(500000);
                    132:        qba_beforescan(sc);
                    133: }