1 /* $NetBSD: central.c,v 1.9 2022/01/22 11:49:17 thorpej Exp $ */
2 /* $OpenBSD: central.c,v 1.7 2010/11/11 17:58:23 miod Exp $ */
3
4 /*
5 * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: central.c,v 1.9 2022/01/22 11:49:17 thorpej Exp $");
32
33 #include <sys/types.h>
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/device.h>
38 #include <sys/conf.h>
39 #include <sys/malloc.h>
40 #include <sys/kmem.h>
41 #include <sys/bus.h>
42
43 #include <machine/autoconf.h>
44 #include <machine/openfirm.h>
45
46 #include <sparc64/dev/centralvar.h>
47
48 struct central_softc {
49 bus_space_tag_t sc_bt;
50 bus_space_tag_t sc_cbt;
51 int sc_node;
52 int sc_nrange;
53 struct central_range *sc_range;
54 };
55
56 static int central_match(device_t, cfdata_t, void *);
57 static void central_attach(device_t, device_t, void *);
58
59 CFATTACH_DECL_NEW(central, sizeof(struct central_softc),
60 central_match, central_attach, NULL, NULL);
61
62 static int central_print(void *, const char *);
63 static int central_get_string(int, const char *, char **);
64
65 static bus_space_tag_t central_alloc_bus_tag(struct central_softc *);
66 static int _central_bus_map(
67 bus_space_tag_t,
68 bus_addr_t, /*offset*/
69 bus_size_t, /*size*/
70 int, /*flags*/
71 vaddr_t, /* XXX unused -- compat w/sparc */
72 bus_space_handle_t *);
73
74 static int
central_match(device_t parent,cfdata_t match,void * aux)75 central_match(device_t parent, cfdata_t match, void *aux)
76 {
77 struct mainbus_attach_args *ma = aux;
78
79 if (strcmp(ma->ma_name, "central") == 0)
80 return (1);
81 return (0);
82 }
83
84 static void
central_attach(device_t parent,device_t self,void * aux)85 central_attach(device_t parent, device_t self, void *aux)
86 {
87 struct central_softc *sc = device_private(self);
88 struct mainbus_attach_args *ma = aux;
89 int node0, node;
90
91 sc->sc_bt = ma->ma_bustag;
92 sc->sc_node = ma->ma_node;
93 sc->sc_cbt = central_alloc_bus_tag(sc);
94
95 prom_getprop(sc->sc_node, "ranges", sizeof(struct central_range),
96 &sc->sc_nrange, (void **)&sc->sc_range);
97
98 printf("\n");
99
100 devhandle_t selfh = device_handle(self);
101 node0 = firstchild(sc->sc_node);
102 for (node = node0; node; node = nextsibling(node)) {
103 struct central_attach_args ca;
104
105 bzero(&ca, sizeof(ca));
106 ca.ca_node = node;
107 ca.ca_bustag = sc->sc_cbt;
108 if (central_get_string(ca.ca_node, "name", &ca.ca_name)) {
109 printf("can't fetch name for node 0x%x\n", node);
110 continue;
111 }
112
113 prom_getprop(node, "reg", sizeof(struct central_reg),
114 &ca.ca_nreg, (void **)&ca.ca_reg);
115
116 (void)config_found(self, (void *)&ca, central_print,
117 CFARGS(.devhandle = prom_node_to_devhandle(selfh,
118 ca.ca_node)));
119
120 if (ca.ca_name != NULL)
121 free(ca.ca_name, M_DEVBUF);
122 }
123 }
124
125 static int
central_get_string(int node,const char * name,char ** buf)126 central_get_string(int node, const char *name, char **buf)
127 {
128 int len;
129
130 len = prom_getproplen(node, name);
131 if (len < 0)
132 return (len);
133 *buf = malloc(len + 1, M_DEVBUF, M_WAITOK);
134 if (len != 0)
135 prom_getpropstringA(node, name, *buf, len + 1);
136 (*buf)[len] = '\0';
137 return (0);
138 }
139
140 static int
central_print(void * args,const char * busname)141 central_print(void *args, const char *busname)
142 {
143 struct central_attach_args *ca = args;
144 char *class;
145
146 if (busname != NULL) {
147 printf("\"%s\" at %s", ca->ca_name, busname);
148 class = prom_getpropstring(ca->ca_node, "device_type");
149 if (*class != '\0')
150 printf(" class %s", class);
151 }
152 return (UNCONF);
153 }
154
155 static bus_space_tag_t
central_alloc_bus_tag(struct central_softc * sc)156 central_alloc_bus_tag(struct central_softc *sc)
157 {
158 struct sparc_bus_space_tag *bt;
159
160 bt = kmem_zalloc(sizeof(*bt), KM_SLEEP);
161 bt->cookie = sc;
162 bt->parent = sc->sc_bt;
163 #if 0
164 bt->asi = bt->parent->asi;
165 bt->sasi = bt->parent->sasi;
166 #endif
167 bt->sparc_bus_map = _central_bus_map;
168 /* XXX bt->sparc_bus_mmap = central_bus_mmap; */
169 /* XXX bt->sparc_intr_establish = upa_intr_establish; */
170 return (bt);
171 }
172
173 static int
_central_bus_map(bus_space_tag_t t,bus_addr_t addr,bus_size_t size,int flags,vaddr_t v,bus_space_handle_t * hp)174 _central_bus_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size, int flags,
175 vaddr_t v, bus_space_handle_t *hp)
176 {
177 struct central_softc *sc = t->cookie;
178 int64_t slot = BUS_ADDR_IOSPACE(addr);
179 int64_t offset = BUS_ADDR_PADDR(addr);
180 int i;
181
182 if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
183 printf("\ncentral_bus_map: invalid parent");
184 return (EINVAL);
185 }
186
187
188 for (i = 0; i < sc->sc_nrange; i++) {
189 bus_addr_t paddr;
190
191 if (sc->sc_range[i].cspace != slot)
192 continue;
193
194 paddr = offset - sc->sc_range[i].coffset;
195 paddr += sc->sc_range[i].poffset;
196 paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);
197
198 return bus_space_map(t->parent, paddr, size, flags, hp);
199 }
200
201 return (EINVAL);
202 }
203