1 /* $OpenBSD: autoconf.c,v 1.106 2019/12/08 12:25:30 mpi 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/buf.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 #include <sys/hibernate.h> 58 59 #include <net/if.h> 60 #include <net/if_types.h> 61 #include <netinet/in.h> 62 #include <netinet/if_ether.h> 63 64 #include <uvm/uvm_extern.h> 65 66 #include <machine/pte.h> 67 #include <machine/cpu.h> 68 #include <machine/gdt.h> 69 #include <machine/biosvar.h> 70 71 #include <dev/cons.h> 72 73 #include "ioapic.h" 74 75 #include "acpi.h" 76 77 #if NIOAPIC > 0 78 #include <machine/i82093var.h> 79 #endif 80 81 #if NACPI > 0 82 #include <dev/acpi/acpivar.h> 83 #endif 84 85 #ifdef MULTIPROCESSOR 86 #include <machine/mpbiosvar.h> 87 #endif 88 89 /* 90 * The following several variables are related to 91 * the configuration process, and are used in initializing 92 * the machine. 93 */ 94 extern dev_t bootdev; 95 96 /* Support for VIA C3 RNG */ 97 extern struct timeout viac3_rnd_tmo; 98 extern int viac3_rnd_present; 99 void viac3_rnd(void *); 100 101 extern struct timeout rdrand_tmo; 102 extern int has_rdrand; 103 extern int has_rdseed; 104 void rdrand(void *); 105 106 #ifdef CRYPTO 107 void viac3_crypto_setup(void); 108 extern int i386_has_xcrypt; 109 #endif 110 111 void 112 unmap_startup(void) 113 { 114 extern int kernel_text[], endboot[]; 115 vaddr_t p = (vaddr_t)kernel_text; 116 117 do { 118 pmap_kremove(p, PAGE_SIZE); 119 p += PAGE_SIZE; 120 } while (p < (vaddr_t)endboot); 121 } 122 123 /* 124 * Determine i/o configuration for a machine. 125 */ 126 void 127 cpu_configure(void) 128 { 129 /* 130 * Note, on i386, configure is not running under splhigh unlike other 131 * architectures. This fact is used by the pcmcia irq line probing. 132 */ 133 134 gdt_init(); /* XXX - pcibios uses gdt stuff */ 135 136 /* Set up proc0's TSS */ 137 i386_proc0_tss_init(); 138 139 pmap_bootstrap_pae(); 140 141 #if defined(MULTIPROCESSOR) || \ 142 (NACPI > 0 && !defined(SMALL_KERNEL)) 143 /* install the lowmem ptp after boot args for 1:1 mappings */ 144 pmap_prealloc_lowmem_ptp(); 145 #endif 146 147 #ifdef MULTIPROCESSOR 148 pmap_kenter_pa((vaddr_t)MP_TRAMPOLINE, /* virtual */ 149 (paddr_t)MP_TRAMPOLINE, /* physical */ 150 PROT_READ | PROT_WRITE | PROT_EXEC); /* protection */ 151 pmap_kenter_pa((vaddr_t)MP_TRAMP_DATA, /* virtual */ 152 (paddr_t)MP_TRAMP_DATA, /* physical */ 153 PROT_READ | PROT_WRITE); /* protection */ 154 #endif 155 156 if (config_rootfound("mainbus", NULL) == NULL) 157 panic("cpu_configure: mainbus not configured"); 158 159 #if NIOAPIC > 0 160 ioapic_enable(); 161 #endif 162 163 proc0.p_addr->u_pcb.pcb_cr0 = rcr0(); 164 165 unmap_startup(); 166 167 #ifdef MULTIPROCESSOR 168 /* propagate TSS configuration to the idle pcb's. */ 169 cpu_init_idle_pcbs(); 170 #endif 171 spl0(); 172 173 /* 174 * We can not know which is our root disk, defer 175 * until we can checksum blocks to figure it out. 176 */ 177 cold = 0; 178 179 180 /* 181 * At this point the RNG is running, and if FSXR is set we can 182 * use it. Here we setup a periodic timeout to collect the data. 183 */ 184 if (viac3_rnd_present) { 185 timeout_set(&viac3_rnd_tmo, viac3_rnd, &viac3_rnd_tmo); 186 viac3_rnd(&viac3_rnd_tmo); 187 } 188 if (has_rdrand || has_rdseed) { 189 timeout_set(&rdrand_tmo, rdrand, &rdrand_tmo); 190 rdrand(&rdrand_tmo); 191 } 192 193 #ifdef CRYPTO 194 /* 195 * Also, if the chip has crypto available, enable it. 196 */ 197 if (i386_has_xcrypt) 198 viac3_crypto_setup(); 199 #endif 200 } 201 202 void 203 device_register(struct device *dev, void *aux) 204 { 205 } 206 207 /* 208 * Now that we are fully operational, we can checksum the 209 * disks, and using some heuristics, hopefully are able to 210 * always determine the correct root disk. 211 */ 212 void 213 diskconf(void) 214 { 215 int majdev, unit, part = 0; 216 struct device *bootdv = NULL; 217 dev_t tmpdev; 218 char buf[128]; 219 extern bios_bootmac_t *bios_bootmac; 220 221 dkcsumattach(); 222 223 if ((bootdev & B_MAGICMASK) == (u_int)B_DEVMAGIC) { 224 majdev = B_TYPE(bootdev); 225 unit = B_UNIT(bootdev); 226 part = B_PARTITION(bootdev); 227 snprintf(buf, sizeof buf, "%s%d%c", findblkname(majdev), 228 unit, part + 'a'); 229 bootdv = parsedisk(buf, strlen(buf), part, &tmpdev); 230 } 231 232 if (bios_bootmac) { 233 struct ifnet *ifp; 234 235 TAILQ_FOREACH(ifp, &ifnet, if_list) { 236 if (ifp->if_type == IFT_ETHER && 237 memcmp(bios_bootmac->mac, 238 ((struct arpcom *)ifp)->ac_enaddr, 239 ETHER_ADDR_LEN) == 0) 240 break; 241 } 242 if (ifp) { 243 printf("PXE boot MAC address %s, interface %s\n", 244 ether_sprintf(bios_bootmac->mac), ifp->if_xname); 245 #if defined(NFSCLIENT) 246 bootdv = parsedisk(ifp->if_xname, strlen(ifp->if_xname), 247 0, &tmpdev); 248 part = 0; 249 #endif 250 } else 251 printf("PXE boot MAC address %s, interface %s\n", 252 ether_sprintf(bios_bootmac->mac), "unknown"); 253 } 254 255 setroot(bootdv, part, RB_USERREQ); 256 dumpconf(); 257 258 #ifdef HIBERNATE 259 hibernate_resume(); 260 #endif /* HIBERNATE */ 261 } 262 263 struct nam2blk nam2blk[] = { 264 { "wd", 0 }, 265 { "fd", 2 }, 266 { "sd", 4 }, 267 { "cd", 6 }, 268 { "vnd", 14 }, 269 { "rd", 17 }, 270 { NULL, -1 } 271 }; 272