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