1 /* $NetBSD: uba_mainbus.c,v 1.14 2017/05/22 17:15:45 ragge 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 1.14 2017/05/22 17:15:45 ragge 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
qba_match(device_t parent,cfdata_t cf,void * aux)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
qba_attach(device_t parent,device_t self,void * aux)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
qba_beforescan(struct uba_softc * sc)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
qba_init(struct uba_softc * sc)193 qba_init(struct uba_softc *sc)
194 {
195 mtpr(0, PR_IUR);
196 DELAY(500000);
197 qba_beforescan(sc);
198 }
199