1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * Copyright (c) 2008 The DragonFly Project. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 38 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $ 39 */ 40 41 /* 42 * Setup the system to run on the current machine. 43 * 44 * Configure() is called at boot time and initializes the vba 45 * device tables and the memory controller monitoring. Available 46 * devices are determined (from possibilities mentioned in ioconf.c), 47 * and the drivers are initialized. 48 */ 49 #include "opt_bootp.h" 50 #include "opt_ffs.h" 51 #include "opt_cd9660.h" 52 #include "opt_nfs.h" 53 #include "opt_nfsroot.h" 54 #include "opt_bus.h" 55 #include "opt_rootdevname.h" 56 57 #include "use_isa.h" 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/bootmaj.h> 62 #include <sys/bus.h> 63 #include <sys/conf.h> 64 #include <sys/diskslice.h> 65 #include <sys/reboot.h> 66 #include <sys/kernel.h> 67 #include <sys/malloc.h> 68 #include <sys/mount.h> 69 #include <sys/cons.h> 70 #include <sys/thread.h> 71 #include <sys/device.h> 72 #include <sys/machintr.h> 73 74 #include <machine/bootinfo.h> 75 #include <machine/md_var.h> 76 #include <machine/smp.h> 77 #include <machine_base/icu/icu.h> 78 79 #include <machine/pcb.h> 80 #include <machine/pcb_ext.h> 81 #include <machine/globaldata.h> 82 83 #if NISA > 0 84 #include <bus/isa/isavar.h> 85 86 device_t isa_bus_device = 0; 87 #endif 88 89 static void configure_first (void *); 90 static void configure (void *); 91 static void configure_final (void *); 92 93 #if defined(FFS) && defined(FFS_ROOT) 94 static void setroot (void); 95 #endif 96 97 #if defined(NFS) && defined(NFS_ROOT) 98 #if !defined(BOOTP_NFSROOT) 99 static void pxe_setup_nfsdiskless(void); 100 #endif 101 #endif 102 103 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 104 /* SI_ORDER_SECOND is hookable */ 105 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 106 /* SI_ORDER_MIDDLE is hookable */ 107 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 108 109 cdev_t rootdev = NULL; 110 cdev_t dumpdev = NULL; 111 112 /* 113 * Determine i/o configuration for a machine. 114 */ 115 static void 116 configure_first(void *dummy) 117 { 118 } 119 120 static void 121 configure(void *dummy) 122 { 123 /* 124 * This will configure all devices, generally starting with the 125 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly 126 * dummies up the attach in order to delay legacy initialization 127 * until after all other busses/subsystems have had a chance 128 * at those resources. 129 */ 130 root_bus_configure(); 131 132 #if NISA > 0 133 /* 134 * Explicitly probe and attach ISA last. The isa bus saves 135 * it's device node at attach time for us here. 136 */ 137 if (isa_bus_device) 138 isa_probe_children(isa_bus_device); 139 #endif 140 141 /* 142 * Allow lowering of the ipl to the lowest kernel level if we 143 * panic (or call tsleep() before clearing `cold'). No level is 144 * completely safe (since a panic may occur in a critical region 145 * at splhigh()), but we want at least bio interrupts to work. 146 */ 147 safepri = TDPRI_KERN_USER; 148 } 149 150 static void 151 configure_final(void *dummy) 152 { 153 cninit_finish(); 154 155 if (bootverbose) { 156 #ifdef SMP /* APIC-IO */ 157 if (apic_io_enable) 158 imen_dump(); 159 #endif 160 161 #if JG 162 /* 163 * Print out the BIOS's idea of the disk geometries. 164 */ 165 int i; 166 kprintf("BIOS Geometries:\n"); 167 for (i = 0; i < N_BIOS_GEOM; i++) { 168 unsigned long bios_geom; 169 int max_cylinder, max_head, max_sector; 170 171 bios_geom = bootinfo.bi_bios_geom[i]; 172 173 /* 174 * XXX the bootstrap punts a 1200K floppy geometry 175 * when the get-disk-geometry interrupt fails. Skip 176 * drives that have this geometry. 177 */ 178 if (bios_geom == 0x4f010f) 179 continue; 180 181 kprintf(" %x:%08lx ", i, bios_geom); 182 max_cylinder = bios_geom >> 16; 183 max_head = (bios_geom >> 8) & 0xff; 184 max_sector = bios_geom & 0xff; 185 kprintf( 186 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 187 max_cylinder, max_cylinder + 1, 188 max_head, max_head + 1, 189 max_sector, max_sector); 190 } 191 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used); 192 193 kprintf("Device configuration finished.\n"); 194 #endif 195 } 196 } 197 198 #ifdef BOOTP 199 void bootpc_init(void); 200 #endif 201 /* 202 * Do legacy root filesystem discovery. 203 */ 204 void 205 cpu_rootconf(void) 206 { 207 #ifdef BOOTP 208 bootpc_init(); 209 #endif 210 #if defined(NFS) && defined(NFS_ROOT) 211 #if !defined(BOOTP_NFSROOT) 212 pxe_setup_nfsdiskless(); 213 if (nfs_diskless_valid) 214 #endif 215 rootdevnames[0] = "nfs:"; 216 #endif 217 #if defined(FFS) && defined(FFS_ROOT) 218 if (!rootdevnames[0]) 219 setroot(); 220 #endif 221 } 222 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL) 223 224 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 225 226 #if defined(FFS) && defined(FFS_ROOT) 227 #define FDMAJOR 2 228 #define FDUNITSHIFT 6 229 230 /* 231 * The boot code uses old block device major numbers to pass bootdev to 232 * us. We have to translate these to character device majors because 233 * we don't have block devices any more. 234 */ 235 static int 236 boot_translate_majdev(int bmajor) 237 { 238 static int conv[] = { BOOTMAJOR_CONVARY }; 239 240 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0])) 241 return(conv[bmajor]); 242 return(-1); 243 } 244 245 /* 246 * Attempt to find the device from which we were booted. 247 * If we can do so, and not instructed not to do so, 248 * set rootdevs[] and rootdevnames[] to correspond to the 249 * boot device(s). 250 * 251 * This code survives in order to allow the system to be 252 * booted from legacy environments that do not correctly 253 * populate the kernel environment. There are significant 254 * restrictions on the bootability of the system in this 255 * situation; it can only be mounting root from a 'da' 256 * 'wd' or 'fd' device, and the root filesystem must be ufs. 257 */ 258 static void 259 setroot(void) 260 { 261 int majdev, mindev, unit, slice, part; 262 cdev_t newrootdev, dev; 263 char partname[2]; 264 char *sname; 265 266 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 267 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 268 return; 269 } 270 majdev = boot_translate_majdev(B_TYPE(bootdev)); 271 if (bootverbose) { 272 kprintf("bootdev: %08lx type=%ld unit=%ld " 273 "slice=%ld part=%ld major=%d\n", 274 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 275 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 276 } 277 dev = udev2dev(makeudev(majdev, 0), 0); 278 if (!dev_is_good(dev)) 279 return; 280 unit = B_UNIT(bootdev); 281 slice = B_SLICE(bootdev); 282 if (slice == WHOLE_DISK_SLICE) 283 slice = COMPATIBILITY_SLICE; 284 if (slice < 0 || slice >= MAX_SLICES) { 285 kprintf("bad slice\n"); 286 return; 287 } 288 289 part = B_PARTITION(bootdev); 290 mindev = dkmakeminor(unit, slice, part); 291 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 292 if (!dev_is_good(newrootdev)) 293 return; 294 sname = dsname(newrootdev, unit, slice, part, partname); 295 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 296 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 297 298 /* 299 * For properly dangerously dedicated disks (ones with a historical 300 * bogus partition table), the boot blocks will give slice = 4, but 301 * the kernel will only provide the compatibility slice since it 302 * knows that slice 4 is not a real slice. Arrange to try mounting 303 * the compatibility slice as root if mounting the slice passed by 304 * the boot blocks fails. This handles the dangerously dedicated 305 * case and perhaps others. 306 */ 307 if (slice == COMPATIBILITY_SLICE) 308 return; 309 slice = COMPATIBILITY_SLICE; 310 sname = dsname(newrootdev, unit, slice, part, partname); 311 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 312 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 313 } 314 #endif 315 316 #if defined(NFS) && defined(NFS_ROOT) 317 #if !defined(BOOTP_NFSROOT) 318 319 #include <sys/socket.h> 320 #include <net/if.h> 321 #include <net/if_dl.h> 322 #include <net/if_types.h> 323 #include <net/if_var.h> 324 #include <net/ethernet.h> 325 #include <netinet/in.h> 326 #include <vfs/nfs/rpcv2.h> 327 #include <vfs/nfs/nfsproto.h> 328 #include <vfs/nfs/nfs.h> 329 #include <vfs/nfs/nfsdiskless.h> 330 331 extern struct nfs_diskless nfs_diskless; 332 333 /* 334 * Convert a kenv variable to a sockaddr. If the kenv variable does not 335 * exist the sockaddr will remain zerod out (callers typically just check 336 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 337 */ 338 static int 339 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 340 { 341 u_int32_t a[4]; 342 char *cp; 343 344 bzero(sa, sizeof(*sa)); 345 346 if ((cp = kgetenv(ev)) == NULL) 347 return(1); 348 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 349 return(1); 350 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 351 return(1); 352 /* XXX is this ordering correct? */ 353 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 354 sa->sin_len = sizeof(*sa); 355 sa->sin_family = AF_INET; 356 return(0); 357 } 358 359 static int 360 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 361 { 362 char *cp; 363 u_int32_t a[6]; 364 365 bzero(sa, sizeof(*sa)); 366 sa->sdl_len = sizeof(*sa); 367 sa->sdl_family = AF_LINK; 368 sa->sdl_type = IFT_ETHER; 369 sa->sdl_alen = ETHER_ADDR_LEN; 370 if ((cp = kgetenv(ev)) == NULL) 371 return(1); 372 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 373 return(1); 374 sa->sdl_data[0] = a[0]; 375 sa->sdl_data[1] = a[1]; 376 sa->sdl_data[2] = a[2]; 377 sa->sdl_data[3] = a[3]; 378 sa->sdl_data[4] = a[4]; 379 sa->sdl_data[5] = a[5]; 380 return(0); 381 } 382 383 static int 384 decode_nfshandle(char *ev, u_char *fh) 385 { 386 u_char *cp; 387 int len, val; 388 389 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 390 return(0); 391 len = 0; 392 cp++; 393 for (;;) { 394 if (*cp == 'X') 395 return(len); 396 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 397 return(0); 398 *(fh++) = val; 399 len++; 400 cp += 2; 401 if (len > NFSX_V2FH) 402 return(0); 403 } 404 } 405 406 /* 407 * Populate the essential fields in the nfsv3_diskless structure. 408 * 409 * The loader is expected to export the following environment variables: 410 * 411 * boot.netif.ip IP address on boot interface 412 * boot.netif.netmask netmask on boot interface 413 * boot.netif.gateway default gateway (optional) 414 * boot.netif.hwaddr hardware address of boot interface 415 * boot.nfsroot.server IP address of root filesystem server 416 * boot.nfsroot.path path of the root filesystem on server 417 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 418 */ 419 static void 420 pxe_setup_nfsdiskless(void) 421 { 422 struct nfs_diskless *nd = &nfs_diskless; 423 struct ifnet *ifp; 424 struct sockaddr_dl *sdl, ourdl; 425 struct sockaddr_in myaddr, netmask; 426 char *cp; 427 428 /* set up interface */ 429 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 430 return; 431 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 432 kprintf("PXE: no netmask\n"); 433 return; 434 } 435 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 436 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 437 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 438 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 439 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 440 441 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 442 kprintf("PXE: no hardware address\n"); 443 return; 444 } 445 TAILQ_FOREACH(ifp, &ifnet, if_link) { 446 struct ifaddr_container *ifac; 447 448 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 449 struct ifaddr *ifa = ifac->ifa; 450 451 if ((ifa->ifa_addr->sa_family == AF_LINK) && 452 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 453 if ((sdl->sdl_type == ourdl.sdl_type) && 454 (sdl->sdl_alen == ourdl.sdl_alen) && 455 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 456 ourdl.sdl_data + ourdl.sdl_nlen, 457 sdl->sdl_alen)) 458 goto match_done; 459 } 460 } 461 } 462 kprintf("PXE: no interface\n"); 463 return; /* no matching interface */ 464 match_done: 465 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name)); 466 467 /* set up gateway */ 468 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 469 470 /* XXX set up swap? */ 471 472 /* set up root mount */ 473 nd->root_args.rsize = 8192; /* XXX tunable? */ 474 nd->root_args.wsize = 8192; 475 nd->root_args.sotype = SOCK_STREAM; 476 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT; 477 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 478 kprintf("PXE: no server\n"); 479 return; 480 } 481 nd->root_saddr.sin_port = htons(NFS_PORT); 482 483 /* 484 * A tftp-only loader may pass NFS path information without a 485 * root handle. Generate a warning but continue configuring. 486 */ 487 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 488 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 489 } 490 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 491 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 492 493 nfs_diskless_valid = 1; 494 } 495 496 #endif 497 #endif 498