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_rootdevname.h" 55 56 #include "use_isa.h" 57 58 #include <sys/param.h> 59 #include <sys/systm.h> 60 #include <sys/bootmaj.h> 61 #include <sys/bus.h> 62 #include <sys/conf.h> 63 #include <sys/diskslice.h> 64 #include <sys/reboot.h> 65 #include <sys/kernel.h> 66 #include <sys/malloc.h> 67 #include <sys/mount.h> 68 #include <sys/cons.h> 69 #include <sys/thread.h> 70 #include <sys/device.h> 71 #include <sys/machintr.h> 72 73 #include <machine/bootinfo.h> 74 #include <machine/md_var.h> 75 #include <machine/smp.h> 76 #include <machine_base/icu/icu.h> 77 78 #include <machine/pcb.h> 79 #include <machine/pcb_ext.h> 80 #include <machine/globaldata.h> 81 82 #if NISA > 0 83 #include <bus/isa/isavar.h> 84 85 device_t isa_bus_device = NULL; 86 #endif 87 88 static void configure_first (void *); 89 static void configure (void *); 90 static void configure_final (void *); 91 92 #if defined(FFS) && defined(FFS_ROOT) 93 static void setroot (void); 94 #endif 95 96 #if defined(NFS) && defined(NFS_ROOT) 97 #if !defined(BOOTP_NFSROOT) 98 static void pxe_setup_nfsdiskless(void); 99 #endif 100 #endif 101 102 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 103 /* SI_ORDER_SECOND is hookable */ 104 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 105 /* SI_ORDER_MIDDLE is hookable */ 106 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 107 108 cdev_t rootdev = NULL; 109 cdev_t dumpdev = NULL; 110 111 /* 112 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to 113 * be able to max-out a GigE link if the server supports it. Many servers 114 * do not so the default is 8192. 115 * 116 * nfsroot.rahead defaults to something reasonable, can be overridden. 117 */ 118 static int nfsroot_iosize = 8192; 119 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize); 120 static int nfsroot_rahead = 4; 121 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead); 122 123 /* 124 * Determine i/o configuration for a machine. 125 */ 126 static void 127 configure_first(void *dummy) 128 { 129 } 130 131 static void 132 configure(void *dummy) 133 { 134 /* 135 * This will configure all devices, generally starting with the 136 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly 137 * dummies up the attach in order to delay legacy initialization 138 * until after all other busses/subsystems have had a chance 139 * at those resources. 140 */ 141 root_bus_configure(); 142 143 #if NISA > 0 144 /* 145 * Explicitly probe and attach ISA last. The isa bus saves 146 * it's device node at attach time for us here. 147 */ 148 if (isa_bus_device) 149 isa_probe_children(isa_bus_device); 150 #endif 151 152 /* 153 * Allow lowering of the ipl to the lowest kernel level if we 154 * panic (or call tsleep() before clearing `cold'). No level is 155 * completely safe (since a panic may occur in a critical region 156 * at splhigh()), but we want at least bio interrupts to work. 157 */ 158 safepri = TDPRI_KERN_USER; 159 } 160 161 static void 162 configure_final(void *dummy) 163 { 164 cninit_finish(); 165 166 if (bootverbose) { 167 #if 0 /* JG */ 168 /* 169 * Print out the BIOS's idea of the disk geometries. 170 */ 171 int i; 172 kprintf("BIOS Geometries:\n"); 173 for (i = 0; i < N_BIOS_GEOM; i++) { 174 unsigned long bios_geom; 175 int max_cylinder, max_head, max_sector; 176 177 bios_geom = bootinfo.bi_bios_geom[i]; 178 179 /* 180 * XXX the bootstrap punts a 1200K floppy geometry 181 * when the get-disk-geometry interrupt fails. Skip 182 * drives that have this geometry. 183 */ 184 if (bios_geom == 0x4f010f) 185 continue; 186 187 kprintf(" %x:%08lx ", i, bios_geom); 188 max_cylinder = bios_geom >> 16; 189 max_head = (bios_geom >> 8) & 0xff; 190 max_sector = bios_geom & 0xff; 191 kprintf( 192 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 193 max_cylinder, max_cylinder + 1, 194 max_head, max_head + 1, 195 max_sector, max_sector); 196 } 197 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used); 198 199 kprintf("Device configuration finished.\n"); 200 #endif 201 } 202 } 203 204 #ifdef BOOTP 205 void bootpc_init(void); 206 #endif 207 /* 208 * Do legacy root filesystem discovery. 209 */ 210 void 211 cpu_rootconf(void) 212 { 213 #ifdef BOOTP 214 bootpc_init(); 215 #endif 216 #if defined(NFS) && defined(NFS_ROOT) 217 #if !defined(BOOTP_NFSROOT) 218 pxe_setup_nfsdiskless(); 219 if (nfs_diskless_valid) 220 #endif 221 rootdevnames[0] = "nfs:"; 222 #endif 223 #if defined(FFS) && defined(FFS_ROOT) 224 if (!rootdevnames[0]) 225 setroot(); 226 #endif 227 } 228 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL); 229 230 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 231 232 #if defined(FFS) && defined(FFS_ROOT) 233 #define FDMAJOR 2 234 #define FDUNITSHIFT 6 235 236 /* 237 * The boot code uses old block device major numbers to pass bootdev to 238 * us. We have to translate these to character device majors because 239 * we don't have block devices any more. 240 */ 241 static int 242 boot_translate_majdev(int bmajor) 243 { 244 static int conv[] = { BOOTMAJOR_CONVARY }; 245 246 if (bmajor >= 0 && bmajor < NELEM(conv)) 247 return(conv[bmajor]); 248 return(-1); 249 } 250 251 /* 252 * Attempt to find the device from which we were booted. 253 * If we can do so, and not instructed not to do so, 254 * set rootdevs[] and rootdevnames[] to correspond to the 255 * boot device(s). 256 * 257 * This code survives in order to allow the system to be 258 * booted from legacy environments that do not correctly 259 * populate the kernel environment. There are significant 260 * restrictions on the bootability of the system in this 261 * situation; it can only be mounting root from a 'da' 262 * 'wd' or 'fd' device, and the root filesystem must be ufs. 263 */ 264 static void 265 setroot(void) 266 { 267 int majdev, mindev, unit, slice, part; 268 cdev_t newrootdev, dev; 269 char partname[2]; 270 char *sname; 271 272 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 273 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 274 return; 275 } 276 majdev = boot_translate_majdev(B_TYPE(bootdev)); 277 if (bootverbose) { 278 kprintf("bootdev: %08lx type=%ld unit=%ld " 279 "slice=%ld part=%ld major=%d\n", 280 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 281 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 282 } 283 dev = udev2dev(makeudev(majdev, 0), 0); 284 if (!dev_is_good(dev)) 285 return; 286 unit = B_UNIT(bootdev); 287 slice = B_SLICE(bootdev); 288 if (slice == WHOLE_DISK_SLICE) 289 slice = COMPATIBILITY_SLICE; 290 if (slice < 0 || slice >= MAX_SLICES) { 291 kprintf("bad slice\n"); 292 return; 293 } 294 295 part = B_PARTITION(bootdev); 296 mindev = dkmakeminor(unit, slice, part); 297 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 298 if (!dev_is_good(newrootdev)) 299 return; 300 sname = dsname(newrootdev, unit, slice, part, partname); 301 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 302 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 303 304 /* 305 * For properly dangerously dedicated disks (ones with a historical 306 * bogus partition table), the boot blocks will give slice = 4, but 307 * the kernel will only provide the compatibility slice since it 308 * knows that slice 4 is not a real slice. Arrange to try mounting 309 * the compatibility slice as root if mounting the slice passed by 310 * the boot blocks fails. This handles the dangerously dedicated 311 * case and perhaps others. 312 */ 313 if (slice == COMPATIBILITY_SLICE) 314 return; 315 slice = COMPATIBILITY_SLICE; 316 sname = dsname(newrootdev, unit, slice, part, partname); 317 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 318 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 319 } 320 #endif 321 322 #if defined(NFS) && defined(NFS_ROOT) 323 #if !defined(BOOTP_NFSROOT) 324 325 #include <sys/socket.h> 326 #include <net/if.h> 327 #include <net/if_dl.h> 328 #include <net/if_types.h> 329 #include <net/if_var.h> 330 #include <net/ethernet.h> 331 #include <netinet/in.h> 332 #include <vfs/nfs/rpcv2.h> 333 #include <vfs/nfs/nfsproto.h> 334 #include <vfs/nfs/nfs.h> 335 #include <vfs/nfs/nfsdiskless.h> 336 337 extern struct nfs_diskless nfs_diskless; 338 339 /* 340 * Convert a kenv variable to a sockaddr. If the kenv variable does not 341 * exist the sockaddr will remain zerod out (callers typically just check 342 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 343 */ 344 static int 345 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 346 { 347 u_int32_t a[4]; 348 char *cp; 349 350 bzero(sa, sizeof(*sa)); 351 352 if ((cp = kgetenv(ev)) == NULL) 353 return(1); 354 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 355 return(1); 356 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 357 return(1); 358 /* XXX is this ordering correct? */ 359 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 360 sa->sin_len = sizeof(*sa); 361 sa->sin_family = AF_INET; 362 return(0); 363 } 364 365 static int 366 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 367 { 368 char *cp; 369 u_int32_t a[6]; 370 371 bzero(sa, sizeof(*sa)); 372 sa->sdl_len = sizeof(*sa); 373 sa->sdl_family = AF_LINK; 374 sa->sdl_type = IFT_ETHER; 375 sa->sdl_alen = ETHER_ADDR_LEN; 376 if ((cp = kgetenv(ev)) == NULL) 377 return(1); 378 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 379 return(1); 380 sa->sdl_data[0] = a[0]; 381 sa->sdl_data[1] = a[1]; 382 sa->sdl_data[2] = a[2]; 383 sa->sdl_data[3] = a[3]; 384 sa->sdl_data[4] = a[4]; 385 sa->sdl_data[5] = a[5]; 386 return(0); 387 } 388 389 static int 390 decode_nfshandle(char *ev, u_char *fh) 391 { 392 u_char *cp; 393 int len, val; 394 395 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 396 return(0); 397 len = 0; 398 cp++; 399 for (;;) { 400 if (*cp == 'X') 401 return(len); 402 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 403 return(0); 404 *(fh++) = val; 405 len++; 406 cp += 2; 407 if (len > NFSX_V2FH) 408 return(0); 409 } 410 } 411 412 /* 413 * Populate the essential fields in the nfsv3_diskless structure. 414 * 415 * The loader is expected to export the following environment variables: 416 * 417 * boot.netif.ip IP address on boot interface 418 * boot.netif.netmask netmask on boot interface 419 * boot.netif.gateway default gateway (optional) 420 * boot.netif.hwaddr hardware address of boot interface 421 * boot.nfsroot.server IP address of root filesystem server 422 * boot.nfsroot.path path of the root filesystem on server 423 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 424 */ 425 static void 426 pxe_setup_nfsdiskless(void) 427 { 428 struct nfs_diskless *nd = &nfs_diskless; 429 struct ifnet *ifp; 430 struct sockaddr_dl *sdl, ourdl; 431 struct sockaddr_in myaddr, netmask; 432 char *cp; 433 434 /* set up interface */ 435 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 436 return; 437 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 438 kprintf("PXE: no netmask\n"); 439 return; 440 } 441 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 442 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 443 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 444 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 445 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 446 447 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 448 kprintf("PXE: no hardware address\n"); 449 return; 450 } 451 ifnet_lock(); 452 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 453 struct ifaddr_container *ifac; 454 455 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 456 struct ifaddr *ifa = ifac->ifa; 457 458 if ((ifa->ifa_addr->sa_family == AF_LINK) && 459 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 460 if ((sdl->sdl_type == ourdl.sdl_type) && 461 (sdl->sdl_alen == ourdl.sdl_alen) && 462 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 463 ourdl.sdl_data + ourdl.sdl_nlen, 464 sdl->sdl_alen)) { 465 strlcpy(nd->myif.ifra_name, 466 ifp->if_xname, 467 sizeof(nd->myif.ifra_name)); 468 ifnet_unlock(); 469 goto match_done; 470 } 471 } 472 } 473 } 474 ifnet_unlock(); 475 kprintf("PXE: no interface\n"); 476 return; /* no matching interface */ 477 match_done: 478 /* set up gateway */ 479 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 480 481 /* XXX set up swap? */ 482 483 /* set up root mount */ 484 nd->root_args.rsize = nfsroot_iosize; 485 nd->root_args.wsize = nfsroot_iosize; 486 nd->root_args.sotype = SOCK_STREAM; 487 nd->root_args.readahead = nfsroot_rahead; 488 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT | 489 NFSMNT_READAHEAD; 490 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 491 kprintf("PXE: no server\n"); 492 return; 493 } 494 nd->root_saddr.sin_port = htons(NFS_PORT); 495 496 /* 497 * A tftp-only loader may pass NFS path information without a 498 * root handle. Generate a warning but continue configuring. 499 */ 500 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 501 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 502 } 503 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 504 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 505 506 nfs_diskless_valid = 1; 507 } 508 509 #endif 510 #endif 511