1 /* $NetBSD: autoconf.c,v 1.11 2021/08/07 16:18:52 thorpej Exp $ */
2 /*-
3 * Copyright (c) 2010, 2011 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to The NetBSD Foundation
7 * by Raytheon BBN Technologies Corp and Defense Advanced Research Projects
8 * Agency and which was developed by Matt Thomas of 3am Software Foundry.
9 *
10 * This material is based upon work supported by the Defense Advanced Research
11 * Projects Agency and Space and Naval Warfare Systems Center, Pacific, under
12 * Contract No. N66001-09-C-2073.
13 * Approved for Public Release, Distribution Unlimited
14 *
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
17 * are met:
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 * 2. Redistributions in binary form must reproduce the above copyright
21 * notice, this list of conditions and the following disclaimer in the
22 * documentation and/or other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
25 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
26 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
28 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
30 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
31 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
32 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
33 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
34 * POSSIBILITY OF SUCH DAMAGE.
35 */
36
37 #include <sys/cdefs.h>
38 __KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.11 2021/08/07 16:18:52 thorpej Exp $");
39
40 #define __INTR_PRIVATE
41
42 #include "locators.h"
43
44 #include <sys/param.h>
45 #include <sys/conf.h>
46 #include <sys/cpu.h>
47 #include <sys/device.h>
48 #include <sys/intr.h>
49 #include <sys/kernel.h>
50 #include <sys/proc.h>
51 #include <sys/systm.h>
52
53 #include <powerpc/booke/cpuvar.h>
54
55 /*
56 * Determine device configuration for a machine.
57 */
58 void
cpu_configure(void)59 cpu_configure(void)
60 {
61
62 intr_init();
63 calc_delayconst();
64
65 if (config_rootfound("mainbus", NULL) == NULL)
66 panic("%s: mainbus not configured", __func__);
67
68 spl0();
69 }
70
71 static volatile int rootconf_timo = 1;
72
73 /*
74 * Setup root device.
75 * Configure swap area.
76 */
77 void
cpu_rootconf(void)78 cpu_rootconf(void)
79 {
80 /*
81 * We wait up to 10 seconds for a bootable device to be found.
82 */
83 while (rootconf_timo > 0) {
84 if (booted_device != NULL) {
85 aprint_normal_dev(booted_device, "boot device\n");
86 break;
87 }
88
89 if (root_string[0] != '\0'
90 && (booted_device = device_find_by_xname(root_string)) != NULL) {
91 aprint_normal_dev(booted_device, "boot device\n");
92 break;
93 }
94
95 if (EWOULDBLOCK == kpause("autoconf", true, 1, NULL)) {
96 rootconf_timo--;
97 }
98 }
99
100 rootconf();
101 }
102
103 void
device_register(device_t dev,void * aux)104 device_register(device_t dev, void *aux)
105 {
106 if (cpu_md_ops.md_device_register != NULL)
107 (*cpu_md_ops.md_device_register)(dev, aux);
108
109 if (booted_device == NULL) {
110 if (root_string[0] != '\0'
111 && !strcmp(device_xname(dev), root_string)) {
112 aprint_normal_dev(dev, "boot device\n");
113 booted_device = dev;
114 } else {
115 rootconf_timo = 5 * hz;
116 }
117 }
118 }
119
120 static bool mainbus_found;
121
122 static int
mainbus_print(void * aux,const char * pnp)123 mainbus_print(void *aux, const char *pnp)
124 {
125 struct mainbus_attach_args *ma = aux;
126
127 if (pnp != NULL)
128 return QUIET;
129
130 if (pnp)
131 aprint_normal("%s at %s", ma->ma_name, pnp);
132 if (ma->ma_node != MAINBUSCF_NODE_DEFAULT)
133 aprint_normal(" node %d", ma->ma_node);
134
135 return (UNCONF);
136 }
137
138 static int
mainbus_match(device_t parent,cfdata_t cf,void * aux)139 mainbus_match(device_t parent, cfdata_t cf, void *aux)
140 {
141 return mainbus_found == false;
142 }
143
144 static void
mainbus_attach(device_t parent,device_t self,void * aux)145 mainbus_attach(device_t parent, device_t self, void *aux)
146 {
147 struct mainbus_attach_args ma;
148
149 mainbus_found = true;
150
151 aprint_normal("\n");
152
153 ma.ma_name = "cpunode";
154 ma.ma_node = 0;
155 ma.ma_memt = curcpu()->ci_softc->cpu_bst;
156 ma.ma_le_memt = curcpu()->ci_softc->cpu_le_bst;
157 ma.ma_dmat = &booke_bus_dma_tag;
158
159 config_found(self, &ma, mainbus_print, CFARGS_NONE);
160 }
161
162 CFATTACH_DECL_NEW(mainbus, 0, mainbus_match, mainbus_attach, NULL, NULL);
163