1 /* $NetBSD: obmem.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: obmem.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
47 static int obmem_match(device_t, cfdata_t, void *);
48 static void obmem_attach(device_t, device_t, void *);
49
50 struct obmem_softc {
51 device_t sc_dev; /* base device */
52 bus_space_tag_t sc_bustag; /* parent bus tag */
53 bus_dma_tag_t sc_dmatag; /* parent bus dma tag */
54 };
55
56 CFATTACH_DECL_NEW(obmem, sizeof(struct obmem_softc),
57 obmem_match, obmem_attach, NULL, NULL);
58
59 static int obmem_attached;
60
61 static paddr_t obmem_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t,
62 off_t, int, int);
63 static int _obmem_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t,
64 bus_size_t, int, vaddr_t, bus_space_handle_t *);
65
66 static struct sun68k_bus_space_tag obmem_space_tag = {
67 NULL, /* cookie */
68 NULL, /* parent bus tag */
69 _obmem_bus_map, /* bus_space_map */
70 NULL, /* bus_space_unmap */
71 NULL, /* bus_space_subregion */
72 NULL, /* bus_space_barrier */
73 obmem_bus_mmap, /* bus_space_mmap */
74 NULL, /* bus_intr_establish */
75 NULL, /* bus_space_peek_N */
76 NULL /* bus_space_poke_N */
77 };
78
79 static int
obmem_match(device_t parent,cfdata_t cf,void * aux)80 obmem_match(device_t parent, cfdata_t cf, void *aux)
81 {
82 struct mainbus_attach_args *ma = aux;
83
84 if (obmem_attached)
85 return 0;
86
87 return ma->ma_name == NULL || strcmp(cf->cf_name, ma->ma_name) == 0;
88 }
89
90 static void
obmem_attach(device_t parent,device_t self,void * aux)91 obmem_attach(device_t parent, device_t self, void *aux)
92 {
93 struct mainbus_attach_args *ma = aux;
94 struct obmem_softc *sc = device_private(self);
95 struct obmem_attach_args obma;
96 const char *const *cpp;
97 static const char *const special[] = {
98 /* find these first */
99 NULL
100 };
101
102 obmem_attached = 1;
103
104 sc->sc_dev = self;
105 aprint_normal("\n");
106
107 sc->sc_bustag = ma->ma_bustag;
108 sc->sc_dmatag = ma->ma_dmatag;
109
110 obmem_space_tag.cookie = sc;
111 obmem_space_tag.parent = sc->sc_bustag;
112
113 /*
114 * Prepare the skeleton attach arguments for our devices.
115 * The values we give in the locators are indications to
116 * sun68k_bus_search about which locators must and must not
117 * be defined.
118 */
119 obma = *ma;
120 obma.obma_bustag = &obmem_space_tag;
121 obma.obma_paddr = LOCATOR_REQUIRED;
122 obma.obma_pri = LOCATOR_OPTIONAL;
123
124 /* Find all `early' obmem devices */
125 for (cpp = special; *cpp != NULL; cpp++) {
126 obma.obma_name = *cpp;
127 config_search(self, &obma,
128 CFARGS(.search = sun68k_bus_search));
129 }
130
131 /* Find all other obmem devices */
132 obma.obma_name = NULL;
133 config_search(self, &obma,
134 CFARGS(.search = sun68k_bus_search));
135 }
136
137 int
_obmem_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)138 _obmem_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr,
139 bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp)
140 {
141 struct obmem_softc *sc = t->cookie;
142
143 return bus_space_map2(sc->sc_bustag, PMAP_OBMEM, paddr,
144 size, flags, vaddr, hp);
145 }
146
147 paddr_t
obmem_bus_mmap(bus_space_tag_t t,bus_type_t btype,bus_addr_t paddr,off_t off,int prot,int flags)148 obmem_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off,
149 int prot, int flags)
150 {
151 struct obmem_softc *sc = t->cookie;
152
153 return bus_space_mmap2(sc->sc_bustag, PMAP_OBMEM, paddr, off,
154 prot, flags);
155 }
156