1 /* $OpenBSD: autoconf.c,v 1.56 2024/05/14 01:42:07 guenther Exp $ */
2 /* $NetBSD: autoconf.c,v 1.1 2003/04/26 18:39:26 fvdl 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
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/device.h>
50 #include <sys/reboot.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/timeout.h>
54 #include <sys/hibernate.h>
55 #include <uvm/uvm_extern.h>
56
57 #include <net/if.h>
58 #include <net/if_types.h>
59 #include <netinet/in.h>
60 #include <netinet/if_ether.h>
61
62 #include <machine/cpu.h>
63 #include <machine/cpufunc.h>
64 #include <machine/biosvar.h>
65
66 #include "ioapic.h"
67 #include "lapic.h"
68
69 #if NIOAPIC > 0
70 #include <machine/i82093var.h>
71 #endif
72
73 #if NLAPIC > 0
74 #include <machine/i82489var.h>
75 #endif
76
77 int cold = 1; /* if 1, still working on cold-start */
78 extern dev_t bootdev;
79
80 /* Support for VIA C3 RNG */
81 extern struct timeout viac3_rnd_tmo;
82 extern int viac3_rnd_present;
83 void viac3_rnd(void *);
84
85 extern struct timeout rdrand_tmo;
86 extern int has_rdrand;
87 extern int has_rdseed;
88 void rdrand(void *);
89
90 #ifdef CRYPTO
91 void viac3_crypto_setup(void);
92 extern int amd64_has_xcrypt;
93
94 void pclmul_setup(void);
95 void aesni_setup(void);
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 x86_64_proc0_tss_ldt_init();
117
118 pmap_randomize();
119 map_tramps();
120
121 if (config_rootfound("mainbus", NULL) == NULL)
122 panic("configure: mainbus not configured");
123
124 intr_printconfig();
125
126 #if NIOAPIC > 0
127 lapic_set_lvt();
128 ioapic_enable();
129 #endif
130
131 unmap_startup();
132
133 lcr8(0);
134 spl0();
135 cold = 0;
136
137 /*
138 * At this point the RNG is running, and if FSXR is set we can
139 * use it. Here we setup a periodic timeout to collect the data.
140 */
141 if (viac3_rnd_present) {
142 timeout_set(&viac3_rnd_tmo, viac3_rnd, &viac3_rnd_tmo);
143 viac3_rnd(&viac3_rnd_tmo);
144 }
145 timeout_set(&rdrand_tmo, rdrand, &rdrand_tmo);
146 rdrand(&rdrand_tmo);
147 #ifdef CRYPTO
148 /*
149 * Also, if the chip has crypto available, enable it.
150 */
151 if (amd64_has_xcrypt)
152 viac3_crypto_setup();
153
154 if (cpu_ecxfeature & CPUIDECX_PCLMUL)
155 pclmul_setup();
156
157 if (cpu_ecxfeature & CPUIDECX_AES)
158 aesni_setup();
159 #endif
160 }
161
162 void
device_register(struct device * dev,void * aux)163 device_register(struct device *dev, void *aux)
164 {
165 }
166
167 /*
168 * Now that we are fully operational, we can checksum the
169 * disks, and using some heuristics, hopefully are able to
170 * always determine the correct root disk.
171 */
172 void
diskconf(void)173 diskconf(void)
174 {
175 int majdev, unit, part = 0;
176 struct device *bootdv = NULL;
177 dev_t tmpdev;
178 char buf[128];
179 extern bios_bootmac_t *bios_bootmac;
180
181 dkcsumattach();
182
183 if ((bootdev & B_MAGICMASK) == (u_int)B_DEVMAGIC) {
184 majdev = B_TYPE(bootdev);
185 unit = B_UNIT(bootdev);
186 part = B_PARTITION(bootdev);
187 snprintf(buf, sizeof buf, "%s%d%c", findblkname(majdev),
188 unit, part + 'a');
189 bootdv = parsedisk(buf, strlen(buf), part, &tmpdev);
190 }
191
192 if (bios_bootmac) {
193 struct ifnet *ifp;
194
195 TAILQ_FOREACH(ifp, &ifnetlist, if_list) {
196 if (ifp->if_type == IFT_ETHER &&
197 memcmp(bios_bootmac->mac,
198 ((struct arpcom *)ifp)->ac_enaddr,
199 ETHER_ADDR_LEN) == 0)
200 break;
201 }
202 if (ifp) {
203 printf("PXE boot MAC address %s, interface %s\n",
204 ether_sprintf(bios_bootmac->mac), ifp->if_xname);
205 #if defined(NFSCLIENT)
206 bootdv = parsedisk(ifp->if_xname, strlen(ifp->if_xname),
207 0, &tmpdev);
208 part = 0;
209 #endif
210 } else
211 printf("PXE boot MAC address %s, interface %s\n",
212 ether_sprintf(bios_bootmac->mac), "unknown");
213 }
214
215 setroot(bootdv, part, RB_USERREQ);
216 dumpconf();
217
218 #ifdef HIBERNATE
219 hibernate_resume();
220 #endif /* HIBERNATE */
221 }
222
223 const struct nam2blk nam2blk[] = {
224 { "wd", 0 },
225 { "fd", 2 },
226 { "sd", 4 },
227 { "cd", 6 },
228 { "vnd", 14 },
229 { "rd", 17 },
230 { NULL, -1 }
231 };
232