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/buf.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 <vm/vm_kern.h> 75 #include <vm/vm_extern.h> 76 #include <vm/vm_pager.h> 77 78 #if 0 79 #include <machine/pcb.h> 80 #include <machine/pcb_ext.h> 81 #endif 82 #include <machine/smp.h> 83 #include <machine/globaldata.h> 84 #include <machine/md_var.h> 85 86 #if NISA > 0 87 #include <bus/isa/isavar.h> 88 89 device_t isa_bus_device = NULL; 90 #endif 91 92 static void cpu_startup (void *); 93 static void configure_first (void *); 94 static void configure (void *); 95 static void configure_final (void *); 96 97 #if defined(FFS) && defined(FFS_ROOT) 98 static void setroot (void); 99 #endif 100 101 #if defined(NFS) && defined(NFS_ROOT) 102 #if !defined(BOOTP_NFSROOT) 103 static void pxe_setup_nfsdiskless(void); 104 #endif 105 #endif 106 107 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 108 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 109 /* SI_ORDER_SECOND is hookable */ 110 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 111 /* SI_ORDER_MIDDLE is hookable */ 112 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 113 114 cdev_t rootdev = NULL; 115 cdev_t dumpdev = NULL; 116 117 /* 118 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to 119 * be able to max-out a GigE link if the server supports it. Many servers 120 * do not so the default is 8192. 121 * 122 * nfsroot.rahead defaults to something reasonable, can be overridden. 123 */ 124 static int nfsroot_iosize = 8192; 125 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize); 126 static int nfsroot_rahead = 4; 127 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead); 128 129 /* 130 * 131 */ 132 static void 133 cpu_startup(void *dummy) 134 { 135 vm_offset_t buffer_sva; 136 vm_offset_t buffer_eva; 137 vm_offset_t pager_sva; 138 vm_offset_t pager_eva; 139 140 kprintf("%s", version); 141 kprintf("real memory = %ju (%juK bytes)\n", 142 (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024)); 143 144 if (nbuf == 0) { 145 int factor = 4 * BKVASIZE / 1024; 146 int kbytes = Maxmem * (PAGE_SIZE / 1024); 147 148 nbuf = 50; 149 if (kbytes > 4096) 150 nbuf += min((kbytes - 4096) / factor, 65536 / factor); 151 if (kbytes > 65536) 152 nbuf += (kbytes - 65536) * 2 / (factor * 5); 153 if (maxbcache && nbuf > maxbcache / BKVASIZE) 154 nbuf = maxbcache / BKVASIZE; 155 } 156 if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) { 157 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2); 158 kprintf("Warning: nbufs capped at %ld\n", nbuf); 159 } 160 161 nswbuf = lmax(lmin(nbuf / 4, 256), 16); 162 #ifdef NSWBUF_MIN 163 if (nswbuf < NSWBUF_MIN) 164 nswbuf = NSWBUF_MIN; 165 #endif 166 167 /* 168 * Allocate memory for the buffer cache 169 */ 170 buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf)); 171 swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf)); 172 173 174 #ifdef DIRECTIO 175 ffs_rawread_setup(); 176 #endif 177 kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva, 178 (nbuf*BKVASIZE*2) + (nswbuf*MAXPHYS) + pager_map_size); 179 kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva, 180 (nbuf*BKVASIZE*2)); 181 buffer_map.system_map = 1; 182 kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva, 183 (nswbuf*MAXPHYS) + pager_map_size); 184 pager_map.system_map = 1; 185 kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count), 186 ptoa(vmstats.v_free_count) / 1024); 187 mp_start(); 188 mp_announce(); 189 cpu_setregs(); 190 } 191 192 /* 193 * Determine i/o configuration for a machine. 194 */ 195 static void 196 configure_first(void *dummy) 197 { 198 } 199 200 static void 201 configure(void *dummy) 202 { 203 /* 204 * Final interrupt support acviation, then enable hardware interrupts. 205 */ 206 MachIntrABI.finalize(); 207 cpu_enable_intr(); 208 209 /* 210 * This will configure all devices, generally starting with the 211 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly 212 * dummies up the attach in order to delay legacy initialization 213 * until after all other busses/subsystems have had a chance 214 * at those resources. 215 */ 216 root_bus_configure(); 217 218 #if NISA > 0 219 /* 220 * Explicitly probe and attach ISA last. The isa bus saves 221 * it's device node at attach time for us here. 222 */ 223 if (isa_bus_device) 224 isa_probe_children(isa_bus_device); 225 #endif 226 227 /* 228 * Allow lowering of the ipl to the lowest kernel level if we 229 * panic (or call tsleep() before clearing `cold'). No level is 230 * completely safe (since a panic may occur in a critical region 231 * at splhigh()), but we want at least bio interrupts to work. 232 */ 233 safepri = TDPRI_KERN_USER; 234 } 235 236 static void 237 configure_final(void *dummy) 238 { 239 cninit_finish(); 240 241 if (bootverbose) 242 kprintf("Device configuration finished.\n"); 243 } 244 245 #ifdef BOOTP 246 void bootpc_init(void); 247 #endif 248 /* 249 * Do legacy root filesystem discovery. 250 */ 251 void 252 cpu_rootconf(void) 253 { 254 #ifdef BOOTP 255 bootpc_init(); 256 #endif 257 #if defined(NFS) && defined(NFS_ROOT) 258 #if !defined(BOOTP_NFSROOT) 259 pxe_setup_nfsdiskless(); 260 if (nfs_diskless_valid) 261 #endif 262 rootdevnames[0] = "nfs:"; 263 #endif 264 #if defined(FFS) && defined(FFS_ROOT) 265 if (!rootdevnames[0]) 266 setroot(); 267 #endif 268 } 269 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL); 270 271 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 272 273 #if defined(FFS) && defined(FFS_ROOT) 274 275 /* 276 * The boot code uses old block device major numbers to pass bootdev to 277 * us. We have to translate these to character device majors because 278 * we don't have block devices any more. 279 */ 280 static int 281 boot_translate_majdev(int bmajor) 282 { 283 static int conv[] = { BOOTMAJOR_CONVARY }; 284 285 if (bmajor >= 0 && bmajor < NELEM(conv)) 286 return(conv[bmajor]); 287 return(-1); 288 } 289 290 /* 291 * Attempt to find the device from which we were booted. 292 * If we can do so, and not instructed not to do so, 293 * set rootdevs[] and rootdevnames[] to correspond to the 294 * boot device(s). 295 * 296 * This code survives in order to allow the system to be 297 * booted from legacy environments that do not correctly 298 * populate the kernel environment. There are significant 299 * restrictions on the bootability of the system in this 300 * situation; it can only be mounting root from a 'da' 301 * 'wd' or 'fd' device, and the root filesystem must be ufs. 302 */ 303 static void 304 setroot(void) 305 { 306 int majdev, mindev, unit, slice, part; 307 cdev_t newrootdev, dev; 308 char partname[2]; 309 char *sname; 310 311 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 312 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 313 return; 314 } 315 majdev = boot_translate_majdev(B_TYPE(bootdev)); 316 if (bootverbose) { 317 kprintf("bootdev: %08lx type=%ld unit=%ld " 318 "slice=%ld part=%ld major=%d\n", 319 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 320 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 321 } 322 dev = udev2dev(makeudev(majdev, 0), 0); 323 if (!dev_is_good(dev)) 324 return; 325 unit = B_UNIT(bootdev); 326 slice = B_SLICE(bootdev); 327 if (slice == WHOLE_DISK_SLICE) 328 slice = COMPATIBILITY_SLICE; 329 if (slice < 0 || slice >= MAX_SLICES) { 330 kprintf("bad slice\n"); 331 return; 332 } 333 334 part = B_PARTITION(bootdev); 335 mindev = dkmakeminor(unit, slice, part); 336 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 337 if (!dev_is_good(newrootdev)) 338 return; 339 sname = dsname(newrootdev, unit, slice, part, partname); 340 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 341 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 342 343 /* 344 * For properly dangerously dedicated disks (ones with a historical 345 * bogus partition table), the boot blocks will give slice = 4, but 346 * the kernel will only provide the compatibility slice since it 347 * knows that slice 4 is not a real slice. Arrange to try mounting 348 * the compatibility slice as root if mounting the slice passed by 349 * the boot blocks fails. This handles the dangerously dedicated 350 * case and perhaps others. 351 */ 352 if (slice == COMPATIBILITY_SLICE) 353 return; 354 slice = COMPATIBILITY_SLICE; 355 sname = dsname(newrootdev, unit, slice, part, partname); 356 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 357 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 358 } 359 #endif 360 361 #if defined(NFS) && defined(NFS_ROOT) 362 #if !defined(BOOTP_NFSROOT) 363 364 #include <sys/socket.h> 365 #include <net/if.h> 366 #include <net/if_dl.h> 367 #include <net/if_types.h> 368 #include <net/if_var.h> 369 #include <net/ethernet.h> 370 #include <netinet/in.h> 371 #include <vfs/nfs/rpcv2.h> 372 #include <vfs/nfs/nfsproto.h> 373 #include <vfs/nfs/nfs.h> 374 #include <vfs/nfs/nfsdiskless.h> 375 376 extern struct nfs_diskless nfs_diskless; 377 378 /* 379 * Convert a kenv variable to a sockaddr. If the kenv variable does not 380 * exist the sockaddr will remain zerod out (callers typically just check 381 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 382 */ 383 static int 384 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 385 { 386 u_int32_t a[4]; 387 char *cp; 388 389 bzero(sa, sizeof(*sa)); 390 391 if ((cp = kgetenv(ev)) == NULL) 392 return(1); 393 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 394 return(1); 395 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 396 return(1); 397 /* XXX is this ordering correct? */ 398 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 399 sa->sin_len = sizeof(*sa); 400 sa->sin_family = AF_INET; 401 return(0); 402 } 403 404 static int 405 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 406 { 407 char *cp; 408 u_int32_t a[6]; 409 410 bzero(sa, sizeof(*sa)); 411 sa->sdl_len = sizeof(*sa); 412 sa->sdl_family = AF_LINK; 413 sa->sdl_type = IFT_ETHER; 414 sa->sdl_alen = ETHER_ADDR_LEN; 415 if ((cp = kgetenv(ev)) == NULL) 416 return(1); 417 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 418 return(1); 419 sa->sdl_data[0] = a[0]; 420 sa->sdl_data[1] = a[1]; 421 sa->sdl_data[2] = a[2]; 422 sa->sdl_data[3] = a[3]; 423 sa->sdl_data[4] = a[4]; 424 sa->sdl_data[5] = a[5]; 425 return(0); 426 } 427 428 static int 429 decode_nfshandle(char *ev, u_char *fh) 430 { 431 u_char *cp; 432 int len, val; 433 434 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 435 return(0); 436 len = 0; 437 cp++; 438 for (;;) { 439 if (*cp == 'X') 440 return(len); 441 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 442 return(0); 443 *(fh++) = val; 444 len++; 445 cp += 2; 446 if (len > NFSX_V2FH) 447 return(0); 448 } 449 } 450 451 /* 452 * Populate the essential fields in the nfsv3_diskless structure. 453 * 454 * The loader is expected to export the following environment variables: 455 * 456 * boot.netif.ip IP address on boot interface 457 * boot.netif.netmask netmask on boot interface 458 * boot.netif.gateway default gateway (optional) 459 * boot.netif.hwaddr hardware address of boot interface 460 * boot.netif.name name of boot interface (instead of hw addr) 461 * boot.nfsroot.server IP address of root filesystem server 462 * boot.nfsroot.path path of the root filesystem on server 463 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 464 */ 465 static void 466 pxe_setup_nfsdiskless(void) 467 { 468 struct nfs_diskless *nd = &nfs_diskless; 469 struct ifnet *ifp; 470 struct ifaddr *ifa; 471 struct sockaddr_dl *sdl, ourdl; 472 struct sockaddr_in myaddr, netmask; 473 char *cp; 474 475 /* set up interface */ 476 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 477 return; 478 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 479 kprintf("PXE: no netmask\n"); 480 return; 481 } 482 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 483 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 484 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 485 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 486 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 487 488 if ((cp = kgetenv("boot.netif.name")) != NULL) { 489 ifnet_lock(); 490 ifp = ifunit(cp); 491 if (ifp) { 492 strlcpy(nd->myif.ifra_name, ifp->if_xname, 493 sizeof(nd->myif.ifra_name)); 494 ifnet_unlock(); 495 goto match_done; 496 } 497 ifnet_unlock(); 498 kprintf("PXE: cannot find interface %s\n", cp); 499 return; 500 } 501 502 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 503 kprintf("PXE: no hardware address\n"); 504 return; 505 } 506 ifa = NULL; 507 ifnet_lock(); 508 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 509 struct ifaddr_container *ifac; 510 511 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 512 ifa = ifac->ifa; 513 514 if ((ifa->ifa_addr->sa_family == AF_LINK) && 515 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 516 if ((sdl->sdl_type == ourdl.sdl_type) && 517 (sdl->sdl_alen == ourdl.sdl_alen) && 518 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 519 ourdl.sdl_data + ourdl.sdl_nlen, 520 sdl->sdl_alen)) { 521 strlcpy(nd->myif.ifra_name, 522 ifp->if_xname, 523 sizeof(nd->myif.ifra_name)); 524 ifnet_unlock(); 525 goto match_done; 526 } 527 } 528 } 529 } 530 ifnet_unlock(); 531 kprintf("PXE: no interface\n"); 532 return; /* no matching interface */ 533 match_done: 534 /* set up gateway */ 535 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 536 537 /* XXX set up swap? */ 538 539 /* set up root mount */ 540 nd->root_args.rsize = nfsroot_iosize; 541 nd->root_args.wsize = nfsroot_iosize; 542 nd->root_args.sotype = SOCK_STREAM; 543 nd->root_args.readahead = nfsroot_rahead; 544 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT | 545 NFSMNT_READAHEAD; 546 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 547 kprintf("PXE: no server\n"); 548 return; 549 } 550 nd->root_saddr.sin_port = htons(NFS_PORT); 551 552 /* 553 * A tftp-only loader may pass NFS path information without a 554 * root handle. Generate a warning but continue configuring. 555 */ 556 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 557 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 558 } 559 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 560 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 561 562 nfs_diskless_valid = 1; 563 } 564 565 #endif 566 #endif 567