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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 34 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $ 35 */ 36 37 /* 38 * Setup the system to run on the current machine. 39 * 40 * Configure() is called at boot time and initializes the vba 41 * device tables and the memory controller monitoring. Available 42 * devices are determined (from possibilities mentioned in ioconf.c), 43 * and the drivers are initialized. 44 */ 45 #include "opt_bootp.h" 46 #include "opt_ffs.h" 47 #include "opt_cd9660.h" 48 #include "opt_nfs.h" 49 #include "opt_nfsroot.h" 50 #include "opt_rootdevname.h" 51 52 #include "use_isa.h" 53 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/bootmaj.h> 57 #include <sys/bus.h> 58 #include <sys/conf.h> 59 #include <sys/diskslice.h> 60 #include <sys/reboot.h> 61 #include <sys/kernel.h> 62 #include <sys/malloc.h> 63 #include <sys/mount.h> 64 #include <sys/cons.h> 65 #include <sys/thread.h> 66 #include <sys/device.h> 67 #include <sys/machintr.h> 68 69 #include <machine/bootinfo.h> 70 #include <machine/md_var.h> 71 #include <machine/smp.h> 72 #include <machine_base/icu/icu.h> 73 74 #include <machine/pcb.h> 75 #include <machine/pcb_ext.h> 76 #include <machine/globaldata.h> 77 78 #if NISA > 0 79 #include <bus/isa/isavar.h> 80 81 device_t isa_bus_device = NULL; 82 #endif 83 84 static void configure_first (void *); 85 static void configure (void *); 86 static void configure_final (void *); 87 88 #if defined(FFS) && defined(FFS_ROOT) 89 static void setroot (void); 90 #endif 91 92 #if defined(NFS) && defined(NFS_ROOT) 93 #if !defined(BOOTP_NFSROOT) 94 static void pxe_setup_nfsdiskless(void); 95 #endif 96 #endif 97 98 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 99 /* SI_ORDER_SECOND is hookable */ 100 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 101 /* SI_ORDER_MIDDLE is hookable */ 102 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 103 104 cdev_t rootdev = NULL; 105 cdev_t dumpdev = NULL; 106 107 /* 108 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to 109 * be able to max-out a GigE link if the server supports it. Many servers 110 * do not so the default is 8192. 111 * 112 * nfsroot.rahead defaults to something reasonable, can be overridden. 113 */ 114 static int nfsroot_iosize = 8192; 115 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize); 116 static int nfsroot_rahead = 4; 117 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead); 118 119 /* 120 * Determine i/o configuration for a machine. 121 */ 122 static void 123 configure_first(void *dummy) 124 { 125 } 126 127 static void 128 configure(void *dummy) 129 { 130 /* 131 * This will configure all devices, generally starting with the 132 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly 133 * dummies up the attach in order to delay legacy initialization 134 * until after all other busses/subsystems have had a chance 135 * at those resources. 136 */ 137 root_bus_configure(); 138 139 #if NISA > 0 140 /* 141 * Explicitly probe and attach ISA last. The isa bus saves 142 * it's device node at attach time for us here. 143 */ 144 if (isa_bus_device) 145 isa_probe_children(isa_bus_device); 146 #endif 147 148 /* 149 * Allow lowering of the ipl to the lowest kernel level if we 150 * panic (or call tsleep() before clearing `cold'). No level is 151 * completely safe (since a panic may occur in a critical region 152 * at splhigh()), but we want at least bio interrupts to work. 153 */ 154 safepri = TDPRI_KERN_USER; 155 } 156 157 static void 158 configure_final(void *dummy) 159 { 160 cninit_finish(); 161 162 if (bootverbose) { 163 #if 0 /* JG */ 164 /* 165 * Print out the BIOS's idea of the disk geometries. 166 */ 167 int i; 168 kprintf("BIOS Geometries:\n"); 169 for (i = 0; i < N_BIOS_GEOM; i++) { 170 unsigned long bios_geom; 171 int max_cylinder, max_head, max_sector; 172 173 bios_geom = bootinfo.bi_bios_geom[i]; 174 175 /* 176 * XXX the bootstrap punts a 1200K floppy geometry 177 * when the get-disk-geometry interrupt fails. Skip 178 * drives that have this geometry. 179 */ 180 if (bios_geom == 0x4f010f) 181 continue; 182 183 kprintf(" %x:%08lx ", i, bios_geom); 184 max_cylinder = bios_geom >> 16; 185 max_head = (bios_geom >> 8) & 0xff; 186 max_sector = bios_geom & 0xff; 187 kprintf( 188 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 189 max_cylinder, max_cylinder + 1, 190 max_head, max_head + 1, 191 max_sector, max_sector); 192 } 193 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used); 194 195 kprintf("Device configuration finished.\n"); 196 #endif 197 } 198 } 199 200 #ifdef BOOTP 201 void bootpc_init(void); 202 #endif 203 /* 204 * Do legacy root filesystem discovery. 205 */ 206 void 207 cpu_rootconf(void) 208 { 209 #ifdef BOOTP 210 bootpc_init(); 211 #endif 212 #if defined(NFS) && defined(NFS_ROOT) 213 #if !defined(BOOTP_NFSROOT) 214 pxe_setup_nfsdiskless(); 215 if (nfs_diskless_valid) 216 #endif 217 rootdevnames[0] = "nfs:"; 218 #endif 219 #if defined(FFS) && defined(FFS_ROOT) 220 if (!rootdevnames[0]) 221 setroot(); 222 #endif 223 } 224 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL); 225 226 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 227 228 #if defined(FFS) && defined(FFS_ROOT) 229 #define FDMAJOR 2 230 #define FDUNITSHIFT 6 231 232 /* 233 * The boot code uses old block device major numbers to pass bootdev to 234 * us. We have to translate these to character device majors because 235 * we don't have block devices any more. 236 */ 237 static int 238 boot_translate_majdev(int bmajor) 239 { 240 static int conv[] = { BOOTMAJOR_CONVARY }; 241 242 if (bmajor >= 0 && bmajor < NELEM(conv)) 243 return(conv[bmajor]); 244 return(-1); 245 } 246 247 /* 248 * Attempt to find the device from which we were booted. 249 * If we can do so, and not instructed not to do so, 250 * set rootdevs[] and rootdevnames[] to correspond to the 251 * boot device(s). 252 * 253 * This code survives in order to allow the system to be 254 * booted from legacy environments that do not correctly 255 * populate the kernel environment. There are significant 256 * restrictions on the bootability of the system in this 257 * situation; it can only be mounting root from a 'da' 258 * 'wd' or 'fd' device, and the root filesystem must be ufs. 259 */ 260 static void 261 setroot(void) 262 { 263 int majdev, mindev, unit, slice, part; 264 cdev_t newrootdev, dev; 265 char partname[2]; 266 char *sname; 267 268 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 269 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 270 return; 271 } 272 majdev = boot_translate_majdev(B_TYPE(bootdev)); 273 if (bootverbose) { 274 kprintf("bootdev: %08lx type=%ld unit=%ld " 275 "slice=%ld part=%ld major=%d\n", 276 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 277 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 278 } 279 dev = udev2dev(makeudev(majdev, 0), 0); 280 if (!dev_is_good(dev)) 281 return; 282 unit = B_UNIT(bootdev); 283 slice = B_SLICE(bootdev); 284 if (slice == WHOLE_DISK_SLICE) 285 slice = COMPATIBILITY_SLICE; 286 if (slice < 0 || slice >= MAX_SLICES) { 287 kprintf("bad slice\n"); 288 return; 289 } 290 291 part = B_PARTITION(bootdev); 292 mindev = dkmakeminor(unit, slice, part); 293 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 294 if (!dev_is_good(newrootdev)) 295 return; 296 sname = dsname(newrootdev, unit, slice, part, partname); 297 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 298 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 299 300 /* 301 * For properly dangerously dedicated disks (ones with a historical 302 * bogus partition table), the boot blocks will give slice = 4, but 303 * the kernel will only provide the compatibility slice since it 304 * knows that slice 4 is not a real slice. Arrange to try mounting 305 * the compatibility slice as root if mounting the slice passed by 306 * the boot blocks fails. This handles the dangerously dedicated 307 * case and perhaps others. 308 */ 309 if (slice == COMPATIBILITY_SLICE) 310 return; 311 slice = COMPATIBILITY_SLICE; 312 sname = dsname(newrootdev, unit, slice, part, partname); 313 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 314 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 315 } 316 #endif 317 318 #if defined(NFS) && defined(NFS_ROOT) 319 #if !defined(BOOTP_NFSROOT) 320 321 #include <sys/socket.h> 322 #include <net/if.h> 323 #include <net/if_dl.h> 324 #include <net/if_types.h> 325 #include <net/if_var.h> 326 #include <net/ethernet.h> 327 #include <netinet/in.h> 328 #include <vfs/nfs/rpcv2.h> 329 #include <vfs/nfs/nfsproto.h> 330 #include <vfs/nfs/nfs.h> 331 #include <vfs/nfs/nfsdiskless.h> 332 333 extern struct nfs_diskless nfs_diskless; 334 335 /* 336 * Convert a kenv variable to a sockaddr. If the kenv variable does not 337 * exist the sockaddr will remain zerod out (callers typically just check 338 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 339 */ 340 static int 341 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 342 { 343 u_int32_t a[4]; 344 char *cp; 345 346 bzero(sa, sizeof(*sa)); 347 348 if ((cp = kgetenv(ev)) == NULL) 349 return(1); 350 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 351 return(1); 352 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 353 return(1); 354 /* XXX is this ordering correct? */ 355 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 356 sa->sin_len = sizeof(*sa); 357 sa->sin_family = AF_INET; 358 return(0); 359 } 360 361 static int 362 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 363 { 364 char *cp; 365 u_int32_t a[6]; 366 367 bzero(sa, sizeof(*sa)); 368 sa->sdl_len = sizeof(*sa); 369 sa->sdl_family = AF_LINK; 370 sa->sdl_type = IFT_ETHER; 371 sa->sdl_alen = ETHER_ADDR_LEN; 372 if ((cp = kgetenv(ev)) == NULL) 373 return(1); 374 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 375 return(1); 376 sa->sdl_data[0] = a[0]; 377 sa->sdl_data[1] = a[1]; 378 sa->sdl_data[2] = a[2]; 379 sa->sdl_data[3] = a[3]; 380 sa->sdl_data[4] = a[4]; 381 sa->sdl_data[5] = a[5]; 382 return(0); 383 } 384 385 static int 386 decode_nfshandle(char *ev, u_char *fh) 387 { 388 u_char *cp; 389 int len, val; 390 391 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 392 return(0); 393 len = 0; 394 cp++; 395 for (;;) { 396 if (*cp == 'X') 397 return(len); 398 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 399 return(0); 400 *(fh++) = val; 401 len++; 402 cp += 2; 403 if (len > NFSX_V2FH) 404 return(0); 405 } 406 } 407 408 /* 409 * Populate the essential fields in the nfsv3_diskless structure. 410 * 411 * The loader is expected to export the following environment variables: 412 * 413 * boot.netif.ip IP address on boot interface 414 * boot.netif.netmask netmask on boot interface 415 * boot.netif.gateway default gateway (optional) 416 * boot.netif.hwaddr hardware address of boot interface 417 * boot.nfsroot.server IP address of root filesystem server 418 * boot.nfsroot.path path of the root filesystem on server 419 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 420 */ 421 static void 422 pxe_setup_nfsdiskless(void) 423 { 424 struct nfs_diskless *nd = &nfs_diskless; 425 struct ifnet *ifp; 426 struct sockaddr_dl *sdl, ourdl; 427 struct sockaddr_in myaddr, netmask; 428 char *cp; 429 430 /* set up interface */ 431 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 432 return; 433 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 434 kprintf("PXE: no netmask\n"); 435 return; 436 } 437 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 438 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 439 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 440 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 441 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 442 443 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 444 kprintf("PXE: no hardware address\n"); 445 return; 446 } 447 ifnet_lock(); 448 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 449 struct ifaddr_container *ifac; 450 451 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 452 struct ifaddr *ifa = ifac->ifa; 453 454 if ((ifa->ifa_addr->sa_family == AF_LINK) && 455 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 456 if ((sdl->sdl_type == ourdl.sdl_type) && 457 (sdl->sdl_alen == ourdl.sdl_alen) && 458 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 459 ourdl.sdl_data + ourdl.sdl_nlen, 460 sdl->sdl_alen)) { 461 strlcpy(nd->myif.ifra_name, 462 ifp->if_xname, 463 sizeof(nd->myif.ifra_name)); 464 ifnet_unlock(); 465 goto match_done; 466 } 467 } 468 } 469 } 470 ifnet_unlock(); 471 kprintf("PXE: no interface\n"); 472 return; /* no matching interface */ 473 match_done: 474 /* set up gateway */ 475 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 476 477 /* XXX set up swap? */ 478 479 /* set up root mount */ 480 nd->root_args.rsize = nfsroot_iosize; 481 nd->root_args.wsize = nfsroot_iosize; 482 nd->root_args.sotype = SOCK_STREAM; 483 nd->root_args.readahead = nfsroot_rahead; 484 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT | 485 NFSMNT_READAHEAD; 486 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 487 kprintf("PXE: no server\n"); 488 return; 489 } 490 nd->root_saddr.sin_port = htons(NFS_PORT); 491 492 /* 493 * A tftp-only loader may pass NFS path information without a 494 * root handle. Generate a warning but continue configuring. 495 */ 496 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 497 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 498 } 499 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 500 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 501 502 nfs_diskless_valid = 1; 503 } 504 505 #endif 506 #endif 507