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 APIC_IO 157 imen_dump(); 158 #endif /* APIC_IO */ 159 160 #if JG 161 /* 162 * Print out the BIOS's idea of the disk geometries. 163 */ 164 int i; 165 kprintf("BIOS Geometries:\n"); 166 for (i = 0; i < N_BIOS_GEOM; i++) { 167 unsigned long bios_geom; 168 int max_cylinder, max_head, max_sector; 169 170 bios_geom = bootinfo.bi_bios_geom[i]; 171 172 /* 173 * XXX the bootstrap punts a 1200K floppy geometry 174 * when the get-disk-geometry interrupt fails. Skip 175 * drives that have this geometry. 176 */ 177 if (bios_geom == 0x4f010f) 178 continue; 179 180 kprintf(" %x:%08lx ", i, bios_geom); 181 max_cylinder = bios_geom >> 16; 182 max_head = (bios_geom >> 8) & 0xff; 183 max_sector = bios_geom & 0xff; 184 kprintf( 185 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 186 max_cylinder, max_cylinder + 1, 187 max_head, max_head + 1, 188 max_sector, max_sector); 189 } 190 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used); 191 192 kprintf("Device configuration finished.\n"); 193 #endif 194 } 195 } 196 197 #ifdef BOOTP 198 void bootpc_init(void); 199 #endif 200 /* 201 * Do legacy root filesystem discovery. 202 */ 203 void 204 cpu_rootconf(void) 205 { 206 #ifdef BOOTP 207 bootpc_init(); 208 #endif 209 #if defined(NFS) && defined(NFS_ROOT) 210 #if !defined(BOOTP_NFSROOT) 211 pxe_setup_nfsdiskless(); 212 if (nfs_diskless_valid) 213 #endif 214 rootdevnames[0] = "nfs:"; 215 #endif 216 #if defined(FFS) && defined(FFS_ROOT) 217 if (!rootdevnames[0]) 218 setroot(); 219 #endif 220 } 221 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL) 222 223 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 224 225 #if defined(FFS) && defined(FFS_ROOT) 226 #define FDMAJOR 2 227 #define FDUNITSHIFT 6 228 229 /* 230 * The boot code uses old block device major numbers to pass bootdev to 231 * us. We have to translate these to character device majors because 232 * we don't have block devices any more. 233 */ 234 static int 235 boot_translate_majdev(int bmajor) 236 { 237 static int conv[] = { BOOTMAJOR_CONVARY }; 238 239 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0])) 240 return(conv[bmajor]); 241 return(-1); 242 } 243 244 /* 245 * Attempt to find the device from which we were booted. 246 * If we can do so, and not instructed not to do so, 247 * set rootdevs[] and rootdevnames[] to correspond to the 248 * boot device(s). 249 * 250 * This code survives in order to allow the system to be 251 * booted from legacy environments that do not correctly 252 * populate the kernel environment. There are significant 253 * restrictions on the bootability of the system in this 254 * situation; it can only be mounting root from a 'da' 255 * 'wd' or 'fd' device, and the root filesystem must be ufs. 256 */ 257 static void 258 setroot(void) 259 { 260 int majdev, mindev, unit, slice, part; 261 cdev_t newrootdev, dev; 262 char partname[2]; 263 char *sname; 264 265 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 266 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 267 return; 268 } 269 majdev = boot_translate_majdev(B_TYPE(bootdev)); 270 if (bootverbose) { 271 kprintf("bootdev: %08lx type=%ld unit=%ld " 272 "slice=%ld part=%ld major=%d\n", 273 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 274 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 275 } 276 dev = udev2dev(makeudev(majdev, 0), 0); 277 if (!dev_is_good(dev)) 278 return; 279 unit = B_UNIT(bootdev); 280 slice = B_SLICE(bootdev); 281 if (slice == WHOLE_DISK_SLICE) 282 slice = COMPATIBILITY_SLICE; 283 if (slice < 0 || slice >= MAX_SLICES) { 284 kprintf("bad slice\n"); 285 return; 286 } 287 288 part = B_PARTITION(bootdev); 289 mindev = dkmakeminor(unit, slice, part); 290 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 291 if (!dev_is_good(newrootdev)) 292 return; 293 sname = dsname(newrootdev, unit, slice, part, partname); 294 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 295 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 296 297 /* 298 * For properly dangerously dedicated disks (ones with a historical 299 * bogus partition table), the boot blocks will give slice = 4, but 300 * the kernel will only provide the compatibility slice since it 301 * knows that slice 4 is not a real slice. Arrange to try mounting 302 * the compatibility slice as root if mounting the slice passed by 303 * the boot blocks fails. This handles the dangerously dedicated 304 * case and perhaps others. 305 */ 306 if (slice == COMPATIBILITY_SLICE) 307 return; 308 slice = COMPATIBILITY_SLICE; 309 sname = dsname(newrootdev, unit, slice, part, partname); 310 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 311 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 312 } 313 #endif 314 315 #if defined(NFS) && defined(NFS_ROOT) 316 #if !defined(BOOTP_NFSROOT) 317 318 #include <sys/socket.h> 319 #include <net/if.h> 320 #include <net/if_dl.h> 321 #include <net/if_types.h> 322 #include <net/if_var.h> 323 #include <net/ethernet.h> 324 #include <netinet/in.h> 325 #include <vfs/nfs/rpcv2.h> 326 #include <vfs/nfs/nfsproto.h> 327 #include <vfs/nfs/nfs.h> 328 #include <vfs/nfs/nfsdiskless.h> 329 330 extern struct nfs_diskless nfs_diskless; 331 332 /* 333 * Convert a kenv variable to a sockaddr. If the kenv variable does not 334 * exist the sockaddr will remain zerod out (callers typically just check 335 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 336 */ 337 static int 338 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 339 { 340 u_int32_t a[4]; 341 char *cp; 342 343 bzero(sa, sizeof(*sa)); 344 345 if ((cp = kgetenv(ev)) == NULL) 346 return(1); 347 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 348 return(1); 349 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 350 return(1); 351 /* XXX is this ordering correct? */ 352 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 353 sa->sin_len = sizeof(*sa); 354 sa->sin_family = AF_INET; 355 return(0); 356 } 357 358 static int 359 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 360 { 361 char *cp; 362 u_int32_t a[6]; 363 364 bzero(sa, sizeof(*sa)); 365 sa->sdl_len = sizeof(*sa); 366 sa->sdl_family = AF_LINK; 367 sa->sdl_type = IFT_ETHER; 368 sa->sdl_alen = ETHER_ADDR_LEN; 369 if ((cp = kgetenv(ev)) == NULL) 370 return(1); 371 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 372 return(1); 373 sa->sdl_data[0] = a[0]; 374 sa->sdl_data[1] = a[1]; 375 sa->sdl_data[2] = a[2]; 376 sa->sdl_data[3] = a[3]; 377 sa->sdl_data[4] = a[4]; 378 sa->sdl_data[5] = a[5]; 379 return(0); 380 } 381 382 static int 383 decode_nfshandle(char *ev, u_char *fh) 384 { 385 u_char *cp; 386 int len, val; 387 388 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 389 return(0); 390 len = 0; 391 cp++; 392 for (;;) { 393 if (*cp == 'X') 394 return(len); 395 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 396 return(0); 397 *(fh++) = val; 398 len++; 399 cp += 2; 400 if (len > NFSX_V2FH) 401 return(0); 402 } 403 } 404 405 /* 406 * Populate the essential fields in the nfsv3_diskless structure. 407 * 408 * The loader is expected to export the following environment variables: 409 * 410 * boot.netif.ip IP address on boot interface 411 * boot.netif.netmask netmask on boot interface 412 * boot.netif.gateway default gateway (optional) 413 * boot.netif.hwaddr hardware address of boot interface 414 * boot.nfsroot.server IP address of root filesystem server 415 * boot.nfsroot.path path of the root filesystem on server 416 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 417 */ 418 static void 419 pxe_setup_nfsdiskless(void) 420 { 421 struct nfs_diskless *nd = &nfs_diskless; 422 struct ifnet *ifp; 423 struct sockaddr_dl *sdl, ourdl; 424 struct sockaddr_in myaddr, netmask; 425 char *cp; 426 427 /* set up interface */ 428 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 429 return; 430 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 431 kprintf("PXE: no netmask\n"); 432 return; 433 } 434 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 435 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 436 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 437 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 438 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 439 440 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 441 kprintf("PXE: no hardware address\n"); 442 return; 443 } 444 ifp = TAILQ_FIRST(&ifnet); 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