1 /* $NetBSD: obmem.c,v 1.29 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 and Gordon W. Ross.
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 /*
33 * On-board MEMory (OBMEM)
34 * Used by frame buffers...
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: obmem.c,v 1.29 2021/08/07 16:19:06 thorpej Exp $");
39
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43
44 #include <uvm/uvm_extern.h>
45
46 #include <machine/autoconf.h>
47 #include <machine/bus.h>
48 #include <sun3/sun3/obmem.h>
49
50 static int obmem_match(device_t, cfdata_t, void *);
51 static void obmem_attach(device_t, device_t, void *);
52
53 struct obmem_softc {
54 device_t sc_dev;
55 bus_space_tag_t sc_bustag;
56 bus_dma_tag_t sc_dmatag;
57 };
58
59 CFATTACH_DECL_NEW(obmem, sizeof(struct obmem_softc),
60 obmem_match, obmem_attach, NULL, NULL);
61
62 static int obmem_attached;
63
64 static int obmem_bus_map(bus_space_tag_t, bus_type_t, bus_addr_t, bus_size_t,
65 int, vaddr_t, bus_space_handle_t *);
66 static paddr_t obmem_bus_mmap(bus_space_tag_t, bus_type_t, bus_addr_t, off_t,
67 int, int);
68
69 static struct sun68k_bus_space_tag obmem_space_tag = {
70 NULL, /* cookie */
71 NULL, /* parent bus space tag */
72 obmem_bus_map, /* bus_space_map */
73 NULL, /* bus_space_unmap */
74 NULL, /* bus_space_subregion */
75 NULL, /* bus_space_barrier */
76 obmem_bus_mmap, /* bus_space_mmap */
77 NULL, /* bus_intr_establish */
78 NULL, /* bus_space_peek_N */
79 NULL /* bus_space_poke_N */
80 };
81
82 static int
obmem_match(device_t parent,cfdata_t cf,void * aux)83 obmem_match(device_t parent, cfdata_t cf, void *aux)
84 {
85 struct confargs *ca = aux;
86
87 if (obmem_attached)
88 return 0;
89
90 if (ca->ca_bustype != BUS_OBMEM)
91 return 0;
92
93 if (ca->ca_name != NULL && strcmp(cf->cf_name, ca->ca_name) != 0)
94 return 0;
95
96 return 1;
97 }
98
99 static void
obmem_attach(device_t parent,device_t self,void * aux)100 obmem_attach(device_t parent, device_t self, void *aux)
101 {
102 struct confargs *ca = aux;
103 struct obmem_softc *sc = device_private(self);
104 struct confargs obma;
105
106 obmem_attached = 1;
107 sc->sc_dev = self;
108
109 aprint_normal("\n");
110
111 sc->sc_bustag = ca->ca_bustag;
112 sc->sc_dmatag = ca->ca_dmatag;
113
114 obmem_space_tag.cookie = sc;
115 obmem_space_tag.parent = sc->sc_bustag;
116
117 obma = *ca;
118 obma.ca_bustag = &obmem_space_tag;
119
120 /* We know ca_bustype == BUS_OBMEM */
121 config_search(self, &obma,
122 CFARGS(.search = bus_scan));
123 }
124
125 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)126 obmem_bus_map(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr,
127 bus_size_t size, int flags, vaddr_t vaddr, bus_space_handle_t *hp)
128 {
129 struct obmem_softc *sc = t->cookie;
130
131 return bus_space_map2(sc->sc_bustag, PMAP_OBMEM, paddr, size, flags,
132 vaddr, hp);
133 }
134
135 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)136 obmem_bus_mmap(bus_space_tag_t t, bus_type_t btype, bus_addr_t paddr, off_t off,
137 int prot, int flags)
138 {
139 struct obmem_softc *sc = t->cookie;
140
141 return bus_space_mmap2(sc->sc_bustag, PMAP_OBMEM, paddr, off, prot,
142 flags);
143 }
144