1 /* $OpenBSD: autoconf.c,v 1.101 2016/06/08 17:24:44 tedu 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 #include <machine/kvm86.h> 71 72 #include <dev/cons.h> 73 74 #include "ioapic.h" 75 76 #include "acpi.h" 77 78 #if NIOAPIC > 0 79 #include <machine/i82093var.h> 80 #endif 81 82 #if NACPI > 0 83 #include <dev/acpi/acpivar.h> 84 #endif 85 86 #ifdef MULTIPROCESSOR 87 #include <machine/mpbiosvar.h> 88 #endif 89 90 /* 91 * The following several variables are related to 92 * the configuration process, and are used in initializing 93 * the machine. 94 */ 95 extern dev_t bootdev; 96 97 /* Support for VIA C3 RNG */ 98 extern struct timeout viac3_rnd_tmo; 99 extern int viac3_rnd_present; 100 void viac3_rnd(void *); 101 102 extern struct timeout rdrand_tmo; 103 extern int has_rdrand; 104 extern int has_rdseed; 105 void rdrand(void *); 106 107 #ifdef CRYPTO 108 void viac3_crypto_setup(void); 109 extern int i386_has_xcrypt; 110 #endif 111 112 /* 113 * Determine i/o configuration for a machine. 114 */ 115 void 116 cpu_configure(void) 117 { 118 /* 119 * Note, on i386, configure is not running under splhigh unlike other 120 * architectures. This fact is used by the pcmcia irq line probing. 121 */ 122 123 gdt_init(); /* XXX - pcibios uses gdt stuff */ 124 125 /* Set up proc0's TSS */ 126 i386_proc0_tss_init(); 127 128 #ifdef KVM86 129 kvm86_init(); 130 #endif 131 pmap_bootstrap_pae(); 132 133 #if defined(MULTIPROCESSOR) || \ 134 (NACPI > 0 && !defined(SMALL_KERNEL)) 135 /* install the lowmem ptp after boot args for 1:1 mappings */ 136 pmap_prealloc_lowmem_ptp(); 137 #endif 138 139 #ifdef MULTIPROCESSOR 140 pmap_kenter_pa((vaddr_t)MP_TRAMPOLINE, /* virtual */ 141 (paddr_t)MP_TRAMPOLINE, /* physical */ 142 PROT_READ | PROT_WRITE | PROT_EXEC); /* protection */ 143 pmap_kenter_pa((vaddr_t)MP_TRAMP_DATA, /* virtual */ 144 (paddr_t)MP_TRAMP_DATA, /* physical */ 145 PROT_READ | PROT_WRITE); /* protection */ 146 #endif 147 148 if (config_rootfound("mainbus", NULL) == NULL) 149 panic("cpu_configure: mainbus not configured"); 150 151 #if NIOAPIC > 0 152 ioapic_enable(); 153 #endif 154 155 proc0.p_addr->u_pcb.pcb_cr0 = rcr0(); 156 157 #ifdef MULTIPROCESSOR 158 /* propagate TSS configuration to the idle pcb's. */ 159 cpu_init_idle_pcbs(); 160 #endif 161 spl0(); 162 163 /* 164 * We can not know which is our root disk, defer 165 * until we can checksum blocks to figure it out. 166 */ 167 cold = 0; 168 169 /* 170 * At this point the RNG is running, and if FSXR is set we can 171 * use it. Here we setup a periodic timeout to collect the data. 172 */ 173 if (viac3_rnd_present) { 174 timeout_set(&viac3_rnd_tmo, viac3_rnd, &viac3_rnd_tmo); 175 viac3_rnd(&viac3_rnd_tmo); 176 } 177 if (has_rdrand || has_rdseed) { 178 timeout_set(&rdrand_tmo, rdrand, &rdrand_tmo); 179 rdrand(&rdrand_tmo); 180 } 181 182 #ifdef CRYPTO 183 /* 184 * Also, if the chip has crypto available, enable it. 185 */ 186 if (i386_has_xcrypt) 187 viac3_crypto_setup(); 188 #endif 189 } 190 191 void 192 device_register(struct device *dev, void *aux) 193 { 194 } 195 196 /* 197 * Now that we are fully operational, we can checksum the 198 * disks, and using some heuristics, hopefully are able to 199 * always determine the correct root disk. 200 */ 201 void 202 diskconf(void) 203 { 204 int majdev, unit, part = 0; 205 struct device *bootdv = NULL; 206 dev_t tmpdev; 207 char buf[128]; 208 extern bios_bootmac_t *bios_bootmac; 209 210 dkcsumattach(); 211 212 if ((bootdev & B_MAGICMASK) == (u_int)B_DEVMAGIC) { 213 majdev = B_TYPE(bootdev); 214 unit = B_UNIT(bootdev); 215 part = B_PARTITION(bootdev); 216 snprintf(buf, sizeof buf, "%s%d%c", findblkname(majdev), 217 unit, part + 'a'); 218 bootdv = parsedisk(buf, strlen(buf), part, &tmpdev); 219 } 220 221 if (bios_bootmac) { 222 struct ifnet *ifp; 223 224 for (ifp = TAILQ_FIRST(&ifnet); ifp != NULL; 225 ifp = TAILQ_NEXT(ifp, if_list)) { 226 if (ifp->if_type == IFT_ETHER && 227 bcmp(bios_bootmac->mac, 228 ((struct arpcom *)ifp)->ac_enaddr, 229 ETHER_ADDR_LEN) == 0) 230 break; 231 } 232 if (ifp) { 233 #if defined(NFSCLIENT) 234 printf("PXE boot MAC address %s, interface %s\n", 235 ether_sprintf(bios_bootmac->mac), ifp->if_xname); 236 bootdv = parsedisk(ifp->if_xname, strlen(ifp->if_xname), 237 0, &tmpdev); 238 part = 0; 239 #endif 240 } else 241 printf("PXE boot MAC address %s, interface %s\n", 242 ether_sprintf(bios_bootmac->mac), "unknown"); 243 } 244 245 setroot(bootdv, part, RB_USERREQ); 246 dumpconf(); 247 248 #ifdef HIBERNATE 249 hibernate_resume(); 250 #endif /* HIBERNATE */ 251 } 252 253 struct nam2blk nam2blk[] = { 254 { "wd", 0 }, 255 { "fd", 2 }, 256 { "sd", 4 }, 257 { "cd", 6 }, 258 { "rd", 17 }, 259 { "vnd", 14 }, 260 { NULL, -1 } 261 }; 262