1 /* $OpenBSD: autoconf.c,v 1.109 2023/01/30 10:49:04 jsg 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/proc.h>
49 #include <sys/user.h>
50 #include <sys/reboot.h>
51 #include <sys/device.h>
52 #include <sys/hibernate.h>
53
54 #include <net/if.h>
55 #include <net/if_types.h>
56 #include <netinet/in.h>
57 #include <netinet/if_ether.h>
58
59 #include <uvm/uvm_extern.h>
60
61 #include <machine/gdt.h>
62 #include <machine/biosvar.h>
63
64 #include "ioapic.h"
65
66 #include "acpi.h"
67
68 #if NIOAPIC > 0
69 #include <machine/i82093var.h>
70 #endif
71
72 #ifdef MULTIPROCESSOR
73 #include <machine/mpbiosvar.h>
74 #endif
75
76 /*
77 * The following several variables are related to
78 * the configuration process, and are used in initializing
79 * the machine.
80 */
81 extern dev_t bootdev;
82
83 /* Support for VIA C3 RNG */
84 extern struct timeout viac3_rnd_tmo;
85 extern int viac3_rnd_present;
86 void viac3_rnd(void *);
87
88 extern struct timeout rdrand_tmo;
89 extern int has_rdrand;
90 extern int has_rdseed;
91 void rdrand(void *);
92
93 #ifdef CRYPTO
94 void viac3_crypto_setup(void);
95 extern int i386_has_xcrypt;
96 #endif
97
98 void
unmap_startup(void)99 unmap_startup(void)
100 {
101 extern int kernel_text[], endboot[];
102 vaddr_t p = (vaddr_t)kernel_text;
103
104 do {
105 pmap_kremove(p, PAGE_SIZE);
106 p += PAGE_SIZE;
107 } while (p < (vaddr_t)endboot);
108 }
109
110 /*
111 * Determine i/o configuration for a machine.
112 */
113 void
cpu_configure(void)114 cpu_configure(void)
115 {
116 /*
117 * Note, on i386, configure is not running under splhigh unlike other
118 * architectures. This fact is used by the pcmcia irq line probing.
119 */
120
121 gdt_init(); /* XXX - pcibios uses gdt stuff */
122
123 /* Set up proc0's TSS */
124 i386_proc0_tss_init();
125
126 pmap_bootstrap_pae();
127
128 #if defined(MULTIPROCESSOR) || \
129 (NACPI > 0 && !defined(SMALL_KERNEL))
130 /* install the lowmem ptp after boot args for 1:1 mappings */
131 pmap_prealloc_lowmem_ptp();
132 #endif
133
134 #ifdef MULTIPROCESSOR
135 pmap_kenter_pa((vaddr_t)MP_TRAMPOLINE, /* virtual */
136 (paddr_t)MP_TRAMPOLINE, /* physical */
137 PROT_READ | PROT_WRITE | PROT_EXEC); /* protection */
138 pmap_kenter_pa((vaddr_t)MP_TRAMP_DATA, /* virtual */
139 (paddr_t)MP_TRAMP_DATA, /* physical */
140 PROT_READ | PROT_WRITE); /* protection */
141 #endif
142
143 if (config_rootfound("mainbus", NULL) == NULL)
144 panic("cpu_configure: mainbus not configured");
145
146 #if NIOAPIC > 0
147 ioapic_enable();
148 #endif
149
150 proc0.p_addr->u_pcb.pcb_cr0 = rcr0();
151
152 unmap_startup();
153
154 #ifdef MULTIPROCESSOR
155 /* propagate TSS configuration to the idle pcb's. */
156 cpu_init_idle_pcbs();
157 #endif
158 spl0();
159
160 /*
161 * We can not know which is our root disk, defer
162 * until we can checksum blocks to figure it out.
163 */
164 cold = 0;
165
166
167 /*
168 * At this point the RNG is running, and if FSXR is set we can
169 * use it. Here we setup a periodic timeout to collect the data.
170 */
171 if (viac3_rnd_present) {
172 timeout_set(&viac3_rnd_tmo, viac3_rnd, &viac3_rnd_tmo);
173 viac3_rnd(&viac3_rnd_tmo);
174 }
175 if (has_rdrand || has_rdseed) {
176 timeout_set(&rdrand_tmo, rdrand, &rdrand_tmo);
177 rdrand(&rdrand_tmo);
178 }
179
180 #ifdef CRYPTO
181 /*
182 * Also, if the chip has crypto available, enable it.
183 */
184 if (i386_has_xcrypt)
185 viac3_crypto_setup();
186 #endif
187 }
188
189 void
device_register(struct device * dev,void * aux)190 device_register(struct device *dev, void *aux)
191 {
192 }
193
194 /*
195 * Now that we are fully operational, we can checksum the
196 * disks, and using some heuristics, hopefully are able to
197 * always determine the correct root disk.
198 */
199 void
diskconf(void)200 diskconf(void)
201 {
202 int majdev, unit, part = 0;
203 struct device *bootdv = NULL;
204 dev_t tmpdev;
205 char buf[128];
206 extern bios_bootmac_t *bios_bootmac;
207
208 dkcsumattach();
209
210 if ((bootdev & B_MAGICMASK) == (u_int)B_DEVMAGIC) {
211 majdev = B_TYPE(bootdev);
212 unit = B_UNIT(bootdev);
213 part = B_PARTITION(bootdev);
214 snprintf(buf, sizeof buf, "%s%d%c", findblkname(majdev),
215 unit, part + 'a');
216 bootdv = parsedisk(buf, strlen(buf), part, &tmpdev);
217 }
218
219 if (bios_bootmac) {
220 struct ifnet *ifp;
221
222 TAILQ_FOREACH(ifp, &ifnetlist, if_list) {
223 if (ifp->if_type == IFT_ETHER &&
224 memcmp(bios_bootmac->mac,
225 ((struct arpcom *)ifp)->ac_enaddr,
226 ETHER_ADDR_LEN) == 0)
227 break;
228 }
229 if (ifp) {
230 printf("PXE boot MAC address %s, interface %s\n",
231 ether_sprintf(bios_bootmac->mac), ifp->if_xname);
232 #if defined(NFSCLIENT)
233 bootdv = parsedisk(ifp->if_xname, strlen(ifp->if_xname),
234 0, &tmpdev);
235 part = 0;
236 #endif
237 } else
238 printf("PXE boot MAC address %s, interface %s\n",
239 ether_sprintf(bios_bootmac->mac), "unknown");
240 }
241
242 setroot(bootdv, part, RB_USERREQ);
243 dumpconf();
244
245 #ifdef HIBERNATE
246 hibernate_resume();
247 #endif /* HIBERNATE */
248 }
249
250 const struct nam2blk nam2blk[] = {
251 { "wd", 0 },
252 { "fd", 2 },
253 { "sd", 4 },
254 { "cd", 6 },
255 { "vnd", 14 },
256 { "rd", 17 },
257 { NULL, -1 }
258 };
259