1 /* $NetBSD: mbio.c,v 1.21 2021/08/07 16:19:06 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 1996 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Adam Glass, Gordon W. Ross, and Matthew Fredette.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: mbio.c,v 1.21 2021/08/07 16:19:06 thorpej Exp $");
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/device.h>
38
39 #include <uvm/uvm_extern.h>
40
41 #include <machine/autoconf.h>
42 #include <machine/pmap.h>
43
44 #include <sun2/sun2/control.h>
45 #include <sun2/sun2/machdep.h>
46 #include <sun2/sun2/mbio.h>
47
48 /* Does this machine have a Multibus? */
49 extern int cpu_has_multibus;
50
51 static int mbio_match(device_t, cfdata_t, void *);
52 static void mbio_attach(device_t, device_t, void *);
53
54 struct mbio_softc {
55 device_t sc_dev; /* base device */
56 bus_space_tag_t sc_bustag; /* parent bus tag */
57 bus_dma_tag_t sc_dmatag; /* parent bus dma tag */
58 };
59
60 CFATTACH_DECL_NEW(mbio, sizeof(struct mbio_softc),
61 mbio_match, mbio_attach, NULL, NULL);
62
63 static int mbio_attached;
64
65 static paddr_t mbio_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, off_t,
66 int, int);
67 static int _mbio_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t,
68 int, vaddr_t, bus_space_handle_t *);
69
70 static struct sun68k_bus_space_tag mbio_space_tag = {
71 NULL, /* cookie */
72 NULL, /* parent bus tag */
73 _mbio_bus_map, /* bus_space_map */
74 NULL, /* bus_space_unmap */
75 NULL, /* bus_space_subregion */
76 NULL, /* bus_space_barrier */
77 mbio_bus_mmap, /* bus_space_mmap */
78 NULL, /* bus_intr_establish */
79 NULL, /* bus_space_peek_N */
80 NULL /* bus_space_poke_N */
81 };
82
83 static int
mbio_match(device_t parent,cfdata_t cf,void * aux)84 mbio_match(device_t parent, cfdata_t cf, void *aux)
85 {
86 struct mainbus_attach_args *ma = aux;
87
88 if (mbio_attached)
89 return 0;
90
91 return (cpu_has_multibus &&
92 (ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0));
93 }
94
95 static void
mbio_attach(device_t parent,device_t self,void * aux)96 mbio_attach(device_t parent, device_t self, void *aux)
97 {
98 struct mainbus_attach_args *ma = aux;
99 struct mbio_softc *sc = device_private(self);
100 struct mbio_attach_args mba;
101 const char *const *cpp;
102 static const char *const special[] = {
103 /* find these first */
104 NULL
105 };
106
107 mbio_attached = 1;
108
109 sc->sc_dev = self;
110 aprint_normal("\n");
111
112 sc->sc_bustag = ma->ma_bustag;
113 sc->sc_dmatag = ma->ma_dmatag;
114
115 mbio_space_tag.cookie = sc;
116 mbio_space_tag.parent = sc->sc_bustag;
117
118 /*
119 * Prepare the skeleton attach arguments for our devices.
120 * The values we give in the locators are indications to
121 * sun68k_bus_search about which locators must and must not
122 * be defined.
123 */
124 mba = *ma;
125 mba.mba_bustag = &mbio_space_tag;
126 mba.mba_paddr = LOCATOR_REQUIRED;
127 mba.mba_pri = LOCATOR_OPTIONAL;
128
129 /* Find all `early' mbio devices */
130 for (cpp = special; *cpp != NULL; cpp++) {
131 mba.mba_name = *cpp;
132 config_search(self, &mba,
133 CFARGS(.search = sun68k_bus_search));
134 }
135
136 /* Find all other mbio devices */
137 mba.mba_name = NULL;
138 config_search(self, &mba,
139 CFARGS(.search = sun68k_bus_search));
140 }
141
142 int
_mbio_bus_map(bus_space_tag_t t,bus_type_t btype,bus_addr_t paddr,bus_size_t size,int flags,vaddr_t vaddr,bus_space_handle_t * hp)143 _mbio_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr,
144 bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp)
145 {
146 struct mbio_softc *sc = t->cookie;
147
148 if ((paddr + size) > MBIO_SIZE)
149 panic("%s: out of range", __func__);
150
151 return bus_space_map2(sc->sc_bustag, PMAP_MBIO, paddr,
152 size, flags | _SUN68K_BUS_MAP_USE_PROM, vaddr, hp);
153 }
154
155 paddr_t
mbio_bus_mmap(bus_space_tag_t t,bus_type_t btype,bus_addr_t paddr,off_t off,int prot,int flags)156 mbio_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off,
157 int prot, int flags)
158 {
159 struct mbio_softc *sc = t->cookie;
160
161 return bus_space_mmap2(sc->sc_bustag, PMAP_MBIO, paddr, off,
162 prot, flags);
163 }
164