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