1 /* $OpenBSD: autoconf.c,v 1.75 2007/06/01 19:25:10 deraadt Exp $ */
2 /* $NetBSD: autoconf.c,v 1.20 1996/05/03 19:41:56 christos Exp $ */
3
4 /*-
5 * Copyright (c) 1990 The Regents of the University of California.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * William Jolitz.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)autoconf.c 7.1 (Berkeley) 5/9/91
36 */
37
38 /*
39 * Setup the system to run on the current machine.
40 *
41 * cpu_configure() is called at boot time and initializes the vba
42 * device tables and the memory controller monitoring. Available
43 * devices are determined (from possibilities mentioned in ioconf.c),
44 * and the drivers are initialized.
45 */
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/user.h>
49 #include <sys/buf.h>
50 #include <sys/dkstat.h>
51 #include <sys/disklabel.h>
52 #include <sys/conf.h>
53 #include <sys/reboot.h>
54 #include <sys/device.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57
58 #include <net/if.h>
59 #include <net/if_types.h>
60 #include <netinet/in.h>
61 #include <netinet/if_ether.h>
62
63 #include <uvm/uvm_extern.h>
64
65 #include <machine/pte.h>
66 #include <machine/cpu.h>
67 #include <machine/gdt.h>
68 #include <machine/biosvar.h>
69 #include <machine/kvm86.h>
70
71 #include <dev/cons.h>
72
73 #include "ioapic.h"
74
75 #if NIOAPIC > 0
76 #include <machine/i82093var.h>
77 #endif
78
79 /*
80 * The following several variables are related to
81 * the configuration process, and are used in initializing
82 * the machine.
83 */
84 extern dev_t bootdev;
85
86 /* Support for VIA C3 RNG */
87 #ifdef I686_CPU
88 extern struct timeout viac3_rnd_tmo;
89 extern int viac3_rnd_present;
90 void viac3_rnd(void *);
91
92 #ifdef CRYPTO
93 void viac3_crypto_setup(void);
94 extern int i386_has_xcrypt;
95 #endif /* CRYPTO */
96 #endif
97
98 /*
99 * Determine i/o configuration for a machine.
100 */
101 void
102 cpu_configure(void)
103 {
104 /*
105 * Note, on i386, configure is not running under splhigh unlike other
106 * architectures. This fact is used by the pcmcia irq line probing.
107 */
108
109 startrtclock();
110
111 gdt_init(); /* XXX - pcibios uses gdt stuff */
112
113 /* Set up proc0's TSS and LDT */
114 i386_proc0_tss_ldt_init();
115
116 #ifdef KVM86
117 kvm86_init();
118 #endif
119
120 if (config_rootfound("mainbus", NULL) == NULL)
121 panic("cpu_configure: mainbus not configured");
122
123 #if NIOAPIC > 0
124 if (nioapics > 0)
125 goto nomasks;
126 #endif
127 printf("biomask %x netmask %x ttymask %x\n", (u_short)IMASK(IPL_BIO),
128 (u_short)IMASK(IPL_NET), (u_short)IMASK(IPL_TTY));
129
130 #if NIOAPIC > 0
131 nomasks:
132 ioapic_enable();
133 #endif
134
135 proc0.p_addr->u_pcb.pcb_cr0 = rcr0();
136
137 #ifdef MULTIPROCESSOR
138 /* propagate TSS and LDT configuration to the idle pcb's. */
139 cpu_init_idle_pcbs();
140 #endif
141 spl0();
142
143 /*
144 * We can not know which is our root disk, defer
145 * until we can checksum blocks to figure it out.
146 */
147 cold = 0;
148
149 #ifdef I686_CPU
150 /*
151 * At this point the RNG is running, and if FSXR is set we can
152 * use it. Here we setup a periodic timeout to collect the data.
153 */
154 if (viac3_rnd_present) {
155 timeout_set(&viac3_rnd_tmo, viac3_rnd, &viac3_rnd_tmo);
156 viac3_rnd(&viac3_rnd_tmo);
157 }
158 #ifdef CRYPTO
159 /*
160 * Also, if the chip has crypto available, enable it.
161 */
162 if (i386_has_xcrypt)
163 viac3_crypto_setup();
164 #endif /* CRYPTO */
165 #endif
166 }
167
168 void
169 device_register(struct device *dev, void *aux)
170 {
171 }
172
173 /*
174 * Now that we are fully operational, we can checksum the
175 * disks, and using some heuristics, hopefully are able to
176 * always determine the correct root disk.
177 */
178 void
179 diskconf(void)
180 {
181 int majdev, unit, part = 0;
182 struct device *bootdv = NULL;
183 dev_t tmpdev;
184 char buf[128];
185 #if defined(NFSCLIENT)
186 extern bios_bootmac_t *bios_bootmac;
187 #endif
188
189 dkcsumattach();
190
191 if ((bootdev & B_MAGICMASK) == (u_int)B_DEVMAGIC) {
192 majdev = B_TYPE(bootdev);
193 unit = B_UNIT(bootdev);
194 part = B_PARTITION(bootdev);
195 snprintf(buf, sizeof buf, "%s%d%c", findblkname(majdev),
196 unit, part + 'a');
197 bootdv = parsedisk(buf, strlen(buf), part, &tmpdev);
198 }
199
200 #if defined(NFSCLIENT)
201 if (bios_bootmac) {
202 struct ifnet *ifp;
203
204 printf("PXE boot MAC address %s, ",
205 ether_sprintf(bios_bootmac->mac));
206 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL;
207 ifp = TAILQ_NEXT(ifp, if_list)) {
208 if ((ifp->if_type == IFT_ETHER ||
209 ifp->if_type == IFT_FDDI) &&
210 bcmp(bios_bootmac->mac,
211 ((struct arpcom *)ifp)->ac_enaddr,
212 ETHER_ADDR_LEN) == 0)
213 break;
214 }
215 if (ifp) {
216 printf("interface %s\n", ifp->if_xname);
217 mountroot = nfs_mountroot; /* potentially */
218 bootdv = parsedisk(ifp->if_xname, strlen(ifp->if_xname),
219 0, &tmpdev);
220 part = 0;
221 } else
222 printf("unknown interface\n");
223 }
224 #endif
225
226 setroot(bootdv, part, RB_USERREQ);
227 dumpconf();
228 }
229
230 struct nam2blk nam2blk[] = {
231 { "wd", 0 },
232 { "fd", 2 },
233 { "sd", 4 },
234 { "cd", 6 },
235 { "mcd", 7 },
236 { "rd", 17 },
237 { "raid", 19 },
238 { NULL, -1 }
239 };