1 /* $NetBSD: uba_mainbus.c,v 1.2 1999/06/06 19:00:53 ragge Exp $ */ 2 /* 3 * Copyright (c) 1996 Jonathan Stone. 4 * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. 5 * Copyright (c) 1982, 1986 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)uba.c 7.10 (Berkeley) 12/16/90 37 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 38 */ 39 40 #include <sys/param.h> 41 #include <sys/device.h> 42 #include <sys/systm.h> 43 44 #define _VAX_BUS_DMA_PRIVATE 45 #include <machine/bus.h> 46 #include <machine/mtpr.h> 47 #include <machine/nexus.h> 48 #include <machine/cpu.h> 49 #include <machine/sgmap.h> 50 51 #include <dev/qbus/ubavar.h> 52 53 #include <arch/vax/uba/uba_common.h> 54 55 /* Some Qbus-specific defines */ 56 #define QBASIZE (8192 * VAX_NBPG) 57 #define QBAMAP 0x20088000 58 #define QIOPAGE 0x20000000 59 60 /* 61 * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems. 62 * It has an address space of 4MB (22 address bits), therefore the name, 63 * and is hardware compatible with all 16 and 18 bits Q-bus devices. 64 */ 65 static int qba_match __P((struct device *, struct cfdata *, void *)); 66 static void qba_attach __P((struct device *, struct device *, void *)); 67 static void qba_beforescan __P((struct uba_softc*)); 68 static void qba_init __P((struct uba_softc*)); 69 70 struct cfattach uba_mainbus_ca = { 71 sizeof(struct uba_vsoftc), qba_match, qba_attach 72 }; 73 74 extern struct vax_bus_space vax_mem_bus_space; 75 76 int 77 qba_match(parent, vcf, aux) 78 struct device *parent; 79 struct cfdata *vcf; 80 void *aux; 81 { 82 struct bp_conf *bp = aux; 83 84 if (strcmp(bp->type, "uba")) 85 return 0; 86 87 return 1; 88 } 89 90 void 91 qba_attach(parent, self, aux) 92 struct device *parent, *self; 93 void *aux; 94 { 95 struct uba_vsoftc *sc = (void *)self; 96 97 printf(": Q22\n"); 98 /* 99 * Fill in bus specific data. 100 */ 101 sc->uv_sc.uh_beforescan = qba_beforescan; 102 sc->uv_sc.uh_ubainit = qba_init; 103 sc->uv_sc.uh_iot = &vax_mem_bus_space; 104 sc->uv_sc.uh_dmat = &sc->uv_dmat; 105 106 /* 107 * Fill in variables used by the sgmap system. 108 */ 109 sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */ 110 sc->uv_addr = QBAMAP; /* Physical address of map registers */ 111 112 uba_dma_init(sc); 113 uba_attach(&sc->uv_sc, QIOPAGE); 114 } 115 116 /* 117 * Called when the QBA is set up; to enable DMA access from 118 * QBA devices to main memory. 119 */ 120 void 121 qba_beforescan(sc) 122 struct uba_softc *sc; 123 { 124 #define QIPCR 0x1f40 125 #define Q_LMEAE 0x20 126 bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE); 127 } 128 129 void 130 qba_init(sc) 131 struct uba_softc *sc; 132 { 133 mtpr(0, PR_IUR); 134 DELAY(500000); 135 qba_beforescan(sc); 136 } 137