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 #if JG 157 /* 158 * Print out the BIOS's idea of the disk geometries. 159 */ 160 int i; 161 kprintf("BIOS Geometries:\n"); 162 for (i = 0; i < N_BIOS_GEOM; i++) { 163 unsigned long bios_geom; 164 int max_cylinder, max_head, max_sector; 165 166 bios_geom = bootinfo.bi_bios_geom[i]; 167 168 /* 169 * XXX the bootstrap punts a 1200K floppy geometry 170 * when the get-disk-geometry interrupt fails. Skip 171 * drives that have this geometry. 172 */ 173 if (bios_geom == 0x4f010f) 174 continue; 175 176 kprintf(" %x:%08lx ", i, bios_geom); 177 max_cylinder = bios_geom >> 16; 178 max_head = (bios_geom >> 8) & 0xff; 179 max_sector = bios_geom & 0xff; 180 kprintf( 181 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 182 max_cylinder, max_cylinder + 1, 183 max_head, max_head + 1, 184 max_sector, max_sector); 185 } 186 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used); 187 188 kprintf("Device configuration finished.\n"); 189 #endif 190 } 191 } 192 193 #ifdef BOOTP 194 void bootpc_init(void); 195 #endif 196 /* 197 * Do legacy root filesystem discovery. 198 */ 199 void 200 cpu_rootconf(void) 201 { 202 #ifdef BOOTP 203 bootpc_init(); 204 #endif 205 #if defined(NFS) && defined(NFS_ROOT) 206 #if !defined(BOOTP_NFSROOT) 207 pxe_setup_nfsdiskless(); 208 if (nfs_diskless_valid) 209 #endif 210 rootdevnames[0] = "nfs:"; 211 #endif 212 #if defined(FFS) && defined(FFS_ROOT) 213 if (!rootdevnames[0]) 214 setroot(); 215 #endif 216 } 217 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL) 218 219 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 220 221 #if defined(FFS) && defined(FFS_ROOT) 222 #define FDMAJOR 2 223 #define FDUNITSHIFT 6 224 225 /* 226 * The boot code uses old block device major numbers to pass bootdev to 227 * us. We have to translate these to character device majors because 228 * we don't have block devices any more. 229 */ 230 static int 231 boot_translate_majdev(int bmajor) 232 { 233 static int conv[] = { BOOTMAJOR_CONVARY }; 234 235 if (bmajor >= 0 && bmajor < NELEM(conv)) 236 return(conv[bmajor]); 237 return(-1); 238 } 239 240 /* 241 * Attempt to find the device from which we were booted. 242 * If we can do so, and not instructed not to do so, 243 * set rootdevs[] and rootdevnames[] to correspond to the 244 * boot device(s). 245 * 246 * This code survives in order to allow the system to be 247 * booted from legacy environments that do not correctly 248 * populate the kernel environment. There are significant 249 * restrictions on the bootability of the system in this 250 * situation; it can only be mounting root from a 'da' 251 * 'wd' or 'fd' device, and the root filesystem must be ufs. 252 */ 253 static void 254 setroot(void) 255 { 256 int majdev, mindev, unit, slice, part; 257 cdev_t newrootdev, dev; 258 char partname[2]; 259 char *sname; 260 261 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 262 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 263 return; 264 } 265 majdev = boot_translate_majdev(B_TYPE(bootdev)); 266 if (bootverbose) { 267 kprintf("bootdev: %08lx type=%ld unit=%ld " 268 "slice=%ld part=%ld major=%d\n", 269 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 270 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 271 } 272 dev = udev2dev(makeudev(majdev, 0), 0); 273 if (!dev_is_good(dev)) 274 return; 275 unit = B_UNIT(bootdev); 276 slice = B_SLICE(bootdev); 277 if (slice == WHOLE_DISK_SLICE) 278 slice = COMPATIBILITY_SLICE; 279 if (slice < 0 || slice >= MAX_SLICES) { 280 kprintf("bad slice\n"); 281 return; 282 } 283 284 part = B_PARTITION(bootdev); 285 mindev = dkmakeminor(unit, slice, part); 286 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 287 if (!dev_is_good(newrootdev)) 288 return; 289 sname = dsname(newrootdev, unit, slice, part, partname); 290 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 291 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 292 293 /* 294 * For properly dangerously dedicated disks (ones with a historical 295 * bogus partition table), the boot blocks will give slice = 4, but 296 * the kernel will only provide the compatibility slice since it 297 * knows that slice 4 is not a real slice. Arrange to try mounting 298 * the compatibility slice as root if mounting the slice passed by 299 * the boot blocks fails. This handles the dangerously dedicated 300 * case and perhaps others. 301 */ 302 if (slice == COMPATIBILITY_SLICE) 303 return; 304 slice = COMPATIBILITY_SLICE; 305 sname = dsname(newrootdev, unit, slice, part, partname); 306 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 307 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 308 } 309 #endif 310 311 #if defined(NFS) && defined(NFS_ROOT) 312 #if !defined(BOOTP_NFSROOT) 313 314 #include <sys/socket.h> 315 #include <net/if.h> 316 #include <net/if_dl.h> 317 #include <net/if_types.h> 318 #include <net/if_var.h> 319 #include <net/ethernet.h> 320 #include <netinet/in.h> 321 #include <vfs/nfs/rpcv2.h> 322 #include <vfs/nfs/nfsproto.h> 323 #include <vfs/nfs/nfs.h> 324 #include <vfs/nfs/nfsdiskless.h> 325 326 extern struct nfs_diskless nfs_diskless; 327 328 /* 329 * Convert a kenv variable to a sockaddr. If the kenv variable does not 330 * exist the sockaddr will remain zerod out (callers typically just check 331 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 332 */ 333 static int 334 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 335 { 336 u_int32_t a[4]; 337 char *cp; 338 339 bzero(sa, sizeof(*sa)); 340 341 if ((cp = kgetenv(ev)) == NULL) 342 return(1); 343 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 344 return(1); 345 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 346 return(1); 347 /* XXX is this ordering correct? */ 348 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 349 sa->sin_len = sizeof(*sa); 350 sa->sin_family = AF_INET; 351 return(0); 352 } 353 354 static int 355 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 356 { 357 char *cp; 358 u_int32_t a[6]; 359 360 bzero(sa, sizeof(*sa)); 361 sa->sdl_len = sizeof(*sa); 362 sa->sdl_family = AF_LINK; 363 sa->sdl_type = IFT_ETHER; 364 sa->sdl_alen = ETHER_ADDR_LEN; 365 if ((cp = kgetenv(ev)) == NULL) 366 return(1); 367 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 368 return(1); 369 sa->sdl_data[0] = a[0]; 370 sa->sdl_data[1] = a[1]; 371 sa->sdl_data[2] = a[2]; 372 sa->sdl_data[3] = a[3]; 373 sa->sdl_data[4] = a[4]; 374 sa->sdl_data[5] = a[5]; 375 return(0); 376 } 377 378 static int 379 decode_nfshandle(char *ev, u_char *fh) 380 { 381 u_char *cp; 382 int len, val; 383 384 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 385 return(0); 386 len = 0; 387 cp++; 388 for (;;) { 389 if (*cp == 'X') 390 return(len); 391 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 392 return(0); 393 *(fh++) = val; 394 len++; 395 cp += 2; 396 if (len > NFSX_V2FH) 397 return(0); 398 } 399 } 400 401 /* 402 * Populate the essential fields in the nfsv3_diskless structure. 403 * 404 * The loader is expected to export the following environment variables: 405 * 406 * boot.netif.ip IP address on boot interface 407 * boot.netif.netmask netmask on boot interface 408 * boot.netif.gateway default gateway (optional) 409 * boot.netif.hwaddr hardware address of boot interface 410 * boot.nfsroot.server IP address of root filesystem server 411 * boot.nfsroot.path path of the root filesystem on server 412 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 413 */ 414 static void 415 pxe_setup_nfsdiskless(void) 416 { 417 struct nfs_diskless *nd = &nfs_diskless; 418 struct ifnet *ifp; 419 struct sockaddr_dl *sdl, ourdl; 420 struct sockaddr_in myaddr, netmask; 421 char *cp; 422 423 /* set up interface */ 424 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 425 return; 426 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 427 kprintf("PXE: no netmask\n"); 428 return; 429 } 430 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 431 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 432 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 433 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 434 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 435 436 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 437 kprintf("PXE: no hardware address\n"); 438 return; 439 } 440 TAILQ_FOREACH(ifp, &ifnet, if_link) { 441 struct ifaddr_container *ifac; 442 443 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 444 struct ifaddr *ifa = ifac->ifa; 445 446 if ((ifa->ifa_addr->sa_family == AF_LINK) && 447 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 448 if ((sdl->sdl_type == ourdl.sdl_type) && 449 (sdl->sdl_alen == ourdl.sdl_alen) && 450 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 451 ourdl.sdl_data + ourdl.sdl_nlen, 452 sdl->sdl_alen)) 453 goto match_done; 454 } 455 } 456 } 457 kprintf("PXE: no interface\n"); 458 return; /* no matching interface */ 459 match_done: 460 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name)); 461 462 /* set up gateway */ 463 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 464 465 /* XXX set up swap? */ 466 467 /* set up root mount */ 468 nd->root_args.rsize = 8192; /* XXX tunable? */ 469 nd->root_args.wsize = 8192; 470 nd->root_args.sotype = SOCK_STREAM; 471 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT; 472 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 473 kprintf("PXE: no server\n"); 474 return; 475 } 476 nd->root_saddr.sin_port = htons(NFS_PORT); 477 478 /* 479 * A tftp-only loader may pass NFS path information without a 480 * root handle. Generate a warning but continue configuring. 481 */ 482 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 483 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 484 } 485 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 486 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 487 488 nfs_diskless_valid = 1; 489 } 490 491 #endif 492 #endif 493