1 /* $NetBSD: uba_mainbus.c,v 1.12 2015/07/05 04:53:26 matt Exp $ */ 2 /* 3 * Copyright (c) 1982, 1986 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)uba.c 7.10 (Berkeley) 12/16/90 31 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 32 */ 33 34 /* 35 * Copyright (c) 1996 Jonathan Stone. 36 * Copyright (c) 1994, 1996 Ludd, University of Lule}, Sweden. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)uba.c 7.10 (Berkeley) 12/16/90 67 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: uba_mainbus.c,v 1.12 2015/07/05 04:53:26 matt Exp $"); 72 73 #define _VAX_BUS_DMA_PRIVATE 74 75 #include <sys/param.h> 76 #include <sys/systm.h> 77 #include <sys/bus.h> 78 #include <sys/cpu.h> 79 #include <sys/device.h> 80 81 #include <machine/nexus.h> 82 #include <machine/sgmap.h> 83 #include <machine/mainbus.h> 84 85 #include <dev/qbus/ubavar.h> 86 87 #include <vax/uba/uba_common.h> 88 89 #include "ioconf.h" 90 91 /* Some Qbus-specific defines */ 92 #define QBASIZE (8192 * VAX_NBPG) 93 #define QBAMAP 0x20088000 94 #define QBAMEM 0x30000000 95 #define QIOPAGE 0x20000000 96 97 /* 98 * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems. 99 * It has an address space of 4MB (22 address bits), therefore the name, 100 * and is hardware compatible with all 16 and 18 bits Q-bus devices. 101 */ 102 static int qba_match(device_t, cfdata_t, void *); 103 static void qba_attach(device_t, device_t, void *); 104 static void qba_beforescan(struct uba_softc*); 105 static void qba_init(struct uba_softc*); 106 107 CFATTACH_DECL_NEW(uba_mainbus, sizeof(struct uba_vsoftc), 108 qba_match, qba_attach, NULL, NULL); 109 110 extern struct vax_bus_space vax_mem_bus_space; 111 112 int 113 qba_match(device_t parent, cfdata_t cf, void *aux) 114 { 115 struct mainbus_attach_args * const ma = aux; 116 117 return !strcmp(uba_cd.cd_name, ma->ma_type); 118 } 119 120 void 121 qba_attach(device_t parent, device_t self, void *aux) 122 { 123 struct mainbus_attach_args * const ma = aux; 124 struct uba_vsoftc * const sc = device_private(self); 125 paddr_t paddr; 126 vaddr_t vaddr; 127 int *mapp; 128 int pgnum; 129 //int val; 130 int start; 131 132 aprint_normal(": Q22\n"); 133 134 sc->uv_sc.uh_dev = self; 135 /* 136 * Fill in bus specific data. 137 */ 138 sc->uv_sc.uh_beforescan = qba_beforescan; 139 sc->uv_sc.uh_ubainit = qba_init; 140 sc->uv_sc.uh_iot = ma->ma_iot; 141 sc->uv_sc.uh_dmat = &sc->uv_dmat; 142 143 /* 144 * Fill in variables used by the sgmap system. 145 */ 146 sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */ 147 sc->uv_addr = QBAMAP; /* Physical address of map registers */ 148 149 uba_dma_init(sc); 150 151 mapp = (int *)vax_map_physmem(QBAMAP, QBASIZE/VAX_NBPG); 152 //val = 0; 153 154 for (paddr = QBAMEM, pgnum = 0, start = -1; 155 paddr < QBAMEM + QBASIZE - 8192; 156 paddr += VAX_NBPG, pgnum += 1) { 157 //val = mapp[pgnum]; 158 mapp[pgnum] = 0; 159 vaddr = vax_map_physmem(paddr, 1); 160 if (badaddr((void *)vaddr, 2) == 0) { 161 if (start < 0) 162 start = pgnum; 163 } else if (start >= 0) { 164 aprint_normal("sgmap exclusion at %#x - %#x\n", 165 start*VAX_NBPG, pgnum*VAX_NBPG - 1); 166 vax_sgmap_reserve(start*VAX_NBPG, 167 (pgnum - start)*VAX_NBPG, &sc->uv_sgmap); 168 start = -1; 169 } 170 vax_unmap_physmem(vaddr, 1); 171 //mapp[pgnum] = val; 172 } 173 vax_unmap_physmem((vaddr_t)mapp, QBASIZE/VAX_NBPG); 174 if (start >= 0) { 175 aprint_normal("sgmap exclusion at %#x - %#x\n", 176 start*VAX_NBPG, pgnum*VAX_NBPG - 1); 177 vax_sgmap_reserve(start*VAX_NBPG, (pgnum - start)*VAX_NBPG, 178 &sc->uv_sgmap); 179 } 180 181 /* reserve I/O space within Qbus */ 182 vax_sgmap_reserve(0x3fe000, 0x400000 - 0x3fe000, &sc->uv_sgmap); 183 184 uba_attach(&sc->uv_sc, QIOPAGE); 185 } 186 187 /* 188 * Called when the QBA is set up; to enable DMA access from 189 * QBA devices to main memory. 190 */ 191 void 192 qba_beforescan(struct uba_softc *sc) 193 { 194 #define QIPCR 0x1f40 195 #define Q_LMEAE 0x20 196 bus_space_write_2(sc->uh_tag, sc->uh_ioh, QIPCR, Q_LMEAE); 197 } 198 199 void 200 qba_init(struct uba_softc *sc) 201 { 202 mtpr(0, PR_IUR); 203 DELAY(500000); 204 qba_beforescan(sc); 205 } 206