xref: /netbsd-src/sys/arch/vax/uba/uba_mainbus.c (revision 6a6027692662ba623e7bf5274322989a7b5d1440)
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