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