1 /* $NetBSD: uba_mainbus.c,v 1.15 2025/07/14 12:38:11 hans 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 * 47 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 48 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 50 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 51 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 52 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 53 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 54 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 55 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 56 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 57 * SUCH DAMAGE. 58 * 59 * @(#)uba.c 7.10 (Berkeley) 12/16/90 60 * @(#)autoconf.c 7.20 (Berkeley) 5/9/91 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: uba_mainbus.c,v 1.15 2025/07/14 12:38:11 hans Exp $"); 65 66 #define _VAX_BUS_DMA_PRIVATE 67 68 #include <sys/param.h> 69 #include <sys/systm.h> 70 #include <sys/bus.h> 71 #include <sys/cpu.h> 72 #include <sys/device.h> 73 74 #include <machine/nexus.h> 75 #include <machine/sgmap.h> 76 #include <machine/mainbus.h> 77 78 #include <dev/qbus/ubavar.h> 79 80 #include <vax/uba/uba_common.h> 81 82 #include "ioconf.h" 83 84 /* Some Qbus-specific defines */ 85 #define QBASIZE (8192 * VAX_NBPG) 86 #define QBAMAP 0x20088000 87 #define QBAMEM 0x30000000 88 #define QIOPAGE 0x20000000 89 90 /* 91 * The Q22 bus is the main IO bus on MicroVAX II/MicroVAX III systems. 92 * It has an address space of 4MB (22 address bits), therefore the name, 93 * and is hardware compatible with all 16 and 18 bits Q-bus devices. 94 */ 95 static int qba_match(device_t, cfdata_t, void *); 96 static void qba_attach(device_t, device_t, void *); 97 static void qba_beforescan(struct uba_softc*); 98 static void qba_init(struct uba_softc*); 99 100 CFATTACH_DECL_NEW(uba_mainbus, sizeof(struct uba_vsoftc), 101 qba_match, qba_attach, NULL, NULL); 102 103 extern struct vax_bus_space vax_mem_bus_space; 104 105 int 106 qba_match(device_t parent, cfdata_t cf, void *aux) 107 { 108 struct mainbus_attach_args * const ma = aux; 109 110 return !strcmp(uba_cd.cd_name, ma->ma_type); 111 } 112 113 void 114 qba_attach(device_t parent, device_t self, void *aux) 115 { 116 struct mainbus_attach_args * const ma = aux; 117 struct uba_vsoftc * const sc = device_private(self); 118 paddr_t paddr; 119 vaddr_t vaddr; 120 int *mapp; 121 int pgnum; 122 int val; 123 int start; 124 125 aprint_normal(": Q22\n"); 126 127 sc->uv_sc.uh_dev = self; 128 /* 129 * Fill in bus specific data. 130 */ 131 sc->uv_sc.uh_beforescan = qba_beforescan; 132 sc->uv_sc.uh_ubainit = qba_init; 133 sc->uv_sc.uh_iot = ma->ma_iot; 134 sc->uv_sc.uh_dmat = &sc->uv_dmat; 135 136 /* 137 * Fill in variables used by the sgmap system. 138 */ 139 sc->uv_size = QBASIZE; /* Size in bytes of Qbus space */ 140 sc->uv_addr = QBAMAP; /* Physical address of map registers */ 141 142 uba_dma_init(sc); 143 144 mapp = (int *)vax_map_physmem(QBAMAP, QBASIZE/VAX_NBPG); 145 val = 0; 146 147 for (paddr = QBAMEM, pgnum = 0, start = -1; 148 paddr < QBAMEM + QBASIZE - 8192; 149 paddr += VAX_NBPG, pgnum += 1) { 150 val = mapp[pgnum]; 151 mapp[pgnum] = 0; 152 vaddr = vax_map_physmem(paddr, 1); 153 if (badaddr((void *)vaddr, 2) == 0) { 154 if (start < 0) 155 start = pgnum; 156 } else if (start >= 0) { 157 aprint_normal("sgmap exclusion at %#x - %#x\n", 158 start*VAX_NBPG, pgnum*VAX_NBPG - 1); 159 vax_sgmap_reserve(start*VAX_NBPG, 160 (pgnum - start)*VAX_NBPG, &sc->uv_sgmap); 161 start = -1; 162 } 163 vax_unmap_physmem(vaddr, 1); 164 mapp[pgnum] = val; 165 } 166 vax_unmap_physmem((vaddr_t)mapp, QBASIZE/VAX_NBPG); 167 if (start >= 0) { 168 aprint_normal("sgmap exclusion at %#x - %#x\n", 169 start*VAX_NBPG, pgnum*VAX_NBPG - 1); 170 vax_sgmap_reserve(start*VAX_NBPG, (pgnum - start)*VAX_NBPG, 171 &sc->uv_sgmap); 172 } 173 174 /* reserve I/O space within Qbus */ 175 vax_sgmap_reserve(0x3fe000, 0x400000 - 0x3fe000, &sc->uv_sgmap); 176 177 uba_attach(&sc->uv_sc, QIOPAGE); 178 } 179 180 /* 181 * Called when the QBA is set up; to enable DMA access from 182 * QBA devices to main memory. 183 */ 184 void 185 qba_beforescan(struct uba_softc *sc) 186 { 187 #define QIPCR 0x1f40 188 #define Q_LMEAE 0x20 189 bus_space_write_2(sc->uh_iot, sc->uh_ioh, QIPCR, Q_LMEAE); 190 } 191 192 void 193 qba_init(struct uba_softc *sc) 194 { 195 mtpr(0, PR_IUR); 196 DELAY(500000); 197 qba_beforescan(sc); 198 } 199
Indexes created Sat Sep 20 22:09:52 GMT 2025