1 /* $NetBSD: cpuunit.c,v 1.18 2021/08/07 16:19:05 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
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 * Autoconfiguration support for Sun4d "cpu units".
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: cpuunit.c,v 1.18 2021/08/07 16:19:05 thorpej Exp $");
38
39 #include <sys/param.h>
40 #include <sys/malloc.h>
41 #include <sys/kmem.h>
42 #include <sys/systm.h>
43 #include <sys/device.h>
44
45 #include <machine/autoconf.h>
46 #include <sys/bus.h>
47
48 #include <sparc/sparc/cpuunitvar.h>
49
50 struct cpuunit_softc {
51 int sc_node; /* our OBP node */
52
53 bus_space_tag_t sc_st; /* ours */
54 bus_space_tag_t sc_bustag; /* passed on to children */
55
56 int sc_device_id; /* device-id */
57 int sc_board; /* board number */
58 };
59
60 static int cpuunit_match(device_t, cfdata_t, void *);
61 static void cpuunit_attach(device_t, device_t, void *);
62
63 CFATTACH_DECL_NEW(cpuunit, sizeof(struct cpuunit_softc),
64 cpuunit_match, cpuunit_attach, NULL, NULL);
65
66 static int cpuunit_print(void *, const char *);
67
68 static int cpuunit_setup_attach_args(struct cpuunit_softc *, bus_space_tag_t,
69 int, struct cpuunit_attach_args *);
70 static void cpuunit_destroy_attach_args(struct cpuunit_attach_args *);
71
72 static int
cpuunit_match(device_t parent,cfdata_t cf,void * aux)73 cpuunit_match(device_t parent, cfdata_t cf, void *aux)
74 {
75 struct mainbus_attach_args *ma = aux;
76
77 if (strcmp(ma->ma_name, "cpu-unit") == 0)
78 return (1);
79
80 return (0);
81 }
82
83 static void
cpuunit_attach(device_t parent,device_t self,void * aux)84 cpuunit_attach(device_t parent, device_t self, void *aux)
85 {
86 struct cpuunit_softc *sc = device_private(self);
87 struct mainbus_attach_args *ma = aux;
88 int node, error;
89 bus_space_tag_t sbt;
90
91 sc->sc_node = ma->ma_node;
92 sc->sc_st = ma->ma_bustag;
93
94 sc->sc_device_id = prom_getpropint(sc->sc_node, "device-id", -1);
95 sc->sc_board = prom_getpropint(sc->sc_node, "board#", -1);
96
97 printf(": board #%d, ID %d\n", sc->sc_board, sc->sc_device_id);
98
99 /*
100 * Initialize the bus space tag we pass on to our children.
101 */
102 sbt = sc->sc_bustag = kmem_alloc(sizeof(*sbt), KM_SLEEP);
103 memcpy(sbt, sc->sc_st, sizeof(*sbt));
104 sbt->cookie = sc;
105 sbt->parent = sc->sc_st;
106 sbt->nranges = 0;
107 sbt->ranges = NULL;
108
109 /*
110 * Collect address translations from the OBP.
111 */
112 error = prom_getprop(sc->sc_node, "ranges",
113 sizeof(struct openprom_range), &sbt->nranges, &sbt->ranges);
114 if (error) {
115 printf("%s: error %d getting \"ranges\" property\n",
116 device_xname(self), error);
117 panic("cpuunit_attach");
118 }
119
120 /* Attach the CPU (and possibly bootbus) child nodes. */
121 for (node = firstchild(sc->sc_node); node != 0;
122 node = nextsibling(node)) {
123 struct cpuunit_attach_args cpua;
124
125 if (cpuunit_setup_attach_args(sc, sbt, node, &cpua))
126 panic("cpuunit_attach: failed to set up attach args");
127
128 (void) config_found(self, &cpua, cpuunit_print, CFARGS_NONE);
129
130 cpuunit_destroy_attach_args(&cpua);
131 }
132 }
133
134 static int
cpuunit_print(void * aux,const char * pnp)135 cpuunit_print(void *aux, const char *pnp)
136 {
137 struct cpuunit_attach_args *cpua = aux;
138
139 if (pnp)
140 aprint_normal("%s at %s", cpua->cpua_name, pnp);
141
142 return (UNCONF);
143 }
144
145 static int
cpuunit_setup_attach_args(struct cpuunit_softc * sc,bus_space_tag_t bustag,int node,struct cpuunit_attach_args * cpua)146 cpuunit_setup_attach_args(struct cpuunit_softc *sc, bus_space_tag_t bustag,
147 int node, struct cpuunit_attach_args *cpua)
148 {
149 int n, error;
150
151 memset(cpua, 0, sizeof(*cpua));
152
153 error = prom_getprop(node, "name", 1, &n, &cpua->cpua_name);
154 if (error)
155 return (error);
156 cpua->cpua_name[n] = '\0';
157
158 error = prom_getprop(node, "device_type", 1, &n,
159 &cpua->cpua_type);
160 if (error) {
161 free(cpua->cpua_name, M_DEVBUF);
162 return (error);
163 }
164
165 cpua->cpua_bustag = bustag;
166 cpua->cpua_node = node;
167 cpua->cpua_device_id = sc->sc_device_id;
168
169 return (0);
170 }
171
172 static void
cpuunit_destroy_attach_args(struct cpuunit_attach_args * cpua)173 cpuunit_destroy_attach_args(struct cpuunit_attach_args *cpua)
174 {
175
176 if (cpua->cpua_name != NULL)
177 free(cpua->cpua_name, M_DEVBUF);
178
179 if (cpua->cpua_type != NULL)
180 free(cpua->cpua_type, M_DEVBUF);
181 }
182