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