1 /* $NetBSD: bootbus.c,v 1.24 2022/01/22 11:49:16 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 "bootbus".
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: bootbus.c,v 1.24 2022/01/22 11:49:16 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 #include <sparc/dev/bootbusvar.h>
50
51 #include "locators.h"
52
53 struct bootbus_softc {
54 int sc_node; /* our OBP node */
55
56 bus_space_tag_t sc_st; /* ours */
57 bus_space_tag_t sc_bustag; /* passed on to children */
58 };
59
60 static int bootbus_match(device_t, cfdata_t, void *);
61 static void bootbus_attach(device_t, device_t, void *);
62
63 CFATTACH_DECL_NEW(bootbus, sizeof(struct bootbus_softc),
64 bootbus_match, bootbus_attach, NULL, NULL);
65
66 static int bootbus_submatch(device_t, cfdata_t, const int *, void *);
67 static int bootbus_print(void *, const char *);
68
69 static int bootbus_setup_attach_args(struct bootbus_softc *, bus_space_tag_t,
70 int, struct bootbus_attach_args *);
71 static void bootbus_destroy_attach_args(struct bootbus_attach_args *);
72
73 static int
bootbus_match(device_t parent,cfdata_t cf,void * aux)74 bootbus_match(device_t parent, cfdata_t cf, void *aux)
75 {
76 struct cpuunit_attach_args *cpua = aux;
77
78 if (strcmp(cpua->cpua_name, cf->cf_name) == 0)
79 return (1);
80
81 return (0);
82 }
83
84 static void
bootbus_attach(device_t parent,device_t self,void * aux)85 bootbus_attach(device_t parent, device_t self, void *aux)
86 {
87 struct bootbus_softc *sc = device_private(self);
88 struct cpuunit_attach_args *cpua = aux;
89 int node, error;
90
91 sc->sc_node = cpua->cpua_node;
92 sc->sc_st = cpua->cpua_bustag;
93
94 printf("\n");
95
96 /*
97 * Initialize the bus space tag we pass on to our children.
98 */
99 sc->sc_bustag = kmem_zalloc(sizeof(*sc->sc_bustag), KM_SLEEP);
100 sc->sc_bustag->cookie = sc;
101 sc->sc_bustag->parent = sc->sc_st;
102 sc->sc_bustag->sparc_bus_map = sc->sc_st->sparc_bus_map;
103 sc->sc_bustag->sparc_bus_mmap = sc->sc_st->sparc_bus_mmap;
104
105 /*
106 * Collect address translations from the OBP.
107 */
108 error = prom_getprop(sc->sc_node, "ranges",
109 sizeof(struct openprom_range), &sc->sc_bustag->nranges,
110 &sc->sc_bustag->ranges);
111 if (error) {
112 printf("%s: error %d getting \"ranges\" property\n",
113 device_xname(self), error);
114 panic("bootbus_attach");
115 }
116
117 /* Attach the CPU (and possibly bootbus) child nodes. */
118 devhandle_t selfh = device_handle(self);
119 for (node = firstchild(sc->sc_node); node != 0;
120 node = nextsibling(node)) {
121 struct bootbus_attach_args baa;
122
123 if (bootbus_setup_attach_args(sc, sc->sc_bustag, node, &baa))
124 panic("bootbus_attach: failed to set up attach args");
125
126 config_found(self, &baa, bootbus_print,
127 CFARGS(.devhandle = prom_node_to_devhandle(selfh, node),
128 .submatch = bootbus_submatch));
129
130 bootbus_destroy_attach_args(&baa);
131 }
132 }
133
134 static int
bootbus_submatch(device_t parent,cfdata_t cf,const int * ldesc,void * aux)135 bootbus_submatch(device_t parent, cfdata_t cf, const int *ldesc, void *aux)
136 {
137 struct bootbus_attach_args *baa = aux;
138
139 if (cf->cf_loc[BOOTBUSCF_SLOT] != BOOTBUSCF_SLOT_DEFAULT &&
140 cf->cf_loc[BOOTBUSCF_SLOT] != baa->ba_slot)
141 return (0);
142
143 if (cf->cf_loc[BOOTBUSCF_OFFSET] != BOOTBUSCF_OFFSET_DEFAULT &&
144 cf->cf_loc[BOOTBUSCF_OFFSET] != baa->ba_offset)
145 return (0);
146
147 return (config_match(parent, cf, aux));
148 }
149
150 static int
bootbus_print(void * aux,const char * pnp)151 bootbus_print(void *aux, const char *pnp)
152 {
153 struct bootbus_attach_args *baa = aux;
154 int i;
155
156 if (pnp)
157 aprint_normal("%s at %s", baa->ba_name, pnp);
158 aprint_normal(" slot %d offset 0x%x", baa->ba_slot, baa->ba_offset);
159 for (i = 0; i < baa->ba_nintr; i++)
160 aprint_normal(" ipl %d", baa->ba_intr[i].oi_pri);
161
162 return (UNCONF);
163 }
164
165 static int
bootbus_setup_attach_args(struct bootbus_softc * sc,bus_space_tag_t bustag,int node,struct bootbus_attach_args * baa)166 bootbus_setup_attach_args(struct bootbus_softc *sc, bus_space_tag_t bustag,
167 int node, struct bootbus_attach_args *baa)
168 {
169 int n, error;
170
171 memset(baa, 0, sizeof(*baa));
172
173 error = prom_getprop(node, "name", 1, &n, &baa->ba_name);
174 if (error)
175 return (error);
176 baa->ba_name[n] = '\0';
177
178 baa->ba_bustag = bustag;
179 baa->ba_node = node;
180
181 error = prom_getprop(node, "reg", sizeof(struct openprom_addr),
182 &baa->ba_nreg, &baa->ba_reg);
183 if (error) {
184 bootbus_destroy_attach_args(baa);
185 return (error);
186 }
187
188 error = prom_getprop(node, "intr", sizeof(struct openprom_intr),
189 &baa->ba_nintr, &baa->ba_intr);
190 if (error != 0 && error != ENOENT) {
191 bootbus_destroy_attach_args(baa);
192 return (error);
193 }
194
195 error = prom_getprop(node, "address", sizeof(uint32_t),
196 &baa->ba_npromvaddrs, &baa->ba_promvaddrs);
197 if (error != 0 && error != ENOENT) {
198 bootbus_destroy_attach_args(baa);
199 return (error);
200 }
201
202 return (0);
203 }
204
205 static void
bootbus_destroy_attach_args(struct bootbus_attach_args * baa)206 bootbus_destroy_attach_args(struct bootbus_attach_args *baa)
207 {
208
209 if (baa->ba_name != NULL)
210 free(baa->ba_name, M_DEVBUF);
211
212 if (baa->ba_reg != NULL)
213 free(baa->ba_reg, M_DEVBUF);
214
215 if (baa->ba_intr != NULL)
216 free(baa->ba_intr, M_DEVBUF);
217
218 if (baa->ba_promvaddrs != NULL)
219 free(baa->ba_promvaddrs, M_DEVBUF);
220 }
221