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/buf.h> 64 #include <sys/conf.h> 65 #include <sys/diskslice.h> 66 #include <sys/reboot.h> 67 #include <sys/kernel.h> 68 #include <sys/malloc.h> 69 #include <sys/mount.h> 70 #include <sys/cons.h> 71 #include <sys/thread.h> 72 #include <sys/device.h> 73 #include <sys/machintr.h> 74 75 #include <vm/vm_kern.h> 76 #include <vm/vm_extern.h> 77 #include <vm/vm_pager.h> 78 79 #if 0 80 #include <machine/pcb.h> 81 #include <machine/pcb_ext.h> 82 #endif 83 #include <machine/smp.h> 84 #include <machine/globaldata.h> 85 #include <machine/md_var.h> 86 87 #if NISA > 0 88 #include <bus/isa/isavar.h> 89 90 device_t isa_bus_device = 0; 91 #endif 92 93 static void cpu_startup (void *); 94 static void configure_first (void *); 95 static void configure (void *); 96 static void configure_final (void *); 97 98 #if defined(FFS) && defined(FFS_ROOT) 99 static void setroot (void); 100 #endif 101 102 #if defined(NFS) && defined(NFS_ROOT) 103 #if !defined(BOOTP_NFSROOT) 104 static void pxe_setup_nfsdiskless(void); 105 #endif 106 #endif 107 108 SYSINIT(cpu, SI_BOOT2_SMP, SI_ORDER_FIRST, cpu_startup, NULL); 109 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 110 /* SI_ORDER_SECOND is hookable */ 111 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 112 /* SI_ORDER_MIDDLE is hookable */ 113 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 114 115 cdev_t rootdev = NULL; 116 cdev_t dumpdev = NULL; 117 118 /* 119 * 120 */ 121 static void 122 cpu_startup(void *dummy) 123 { 124 vm_offset_t buffer_sva; 125 vm_offset_t buffer_eva; 126 vm_offset_t pager_sva; 127 vm_offset_t pager_eva; 128 129 kprintf("%s", version); 130 kprintf("real memory = %ju (%juK bytes)\n", 131 (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024)); 132 133 if (nbuf == 0) { 134 int factor = 4 * BKVASIZE / 1024; 135 int kbytes = Maxmem * (PAGE_SIZE / 1024); 136 137 nbuf = 50; 138 if (kbytes > 4096) 139 nbuf += min((kbytes - 4096) / factor, 65536 / factor); 140 if (kbytes > 65536) 141 nbuf += (kbytes - 65536) * 2 / (factor * 5); 142 if (maxbcache && nbuf > maxbcache / BKVASIZE) 143 nbuf = maxbcache / BKVASIZE; 144 } 145 if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) { 146 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2); 147 kprintf("Warning: nbufs capped at %d\n", nbuf); 148 } 149 150 nswbuf = max(min(nbuf/4, 256), 16); 151 #ifdef NSWBUF_MIN 152 if (nswbuf < NSWBUF_MIN) 153 nswbuf = NSWBUF_MIN; 154 #endif 155 156 /* 157 * Allocate memory for the buffer cache 158 */ 159 buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf)); 160 swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf)); 161 162 163 #ifdef DIRECTIO 164 ffs_rawread_setup(); 165 #endif 166 kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva, 167 (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size); 168 kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva, 169 (nbuf*BKVASIZE)); 170 buffer_map.system_map = 1; 171 kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva, 172 (nswbuf*MAXPHYS) + pager_map_size); 173 pager_map.system_map = 1; 174 #if defined(USERCONFIG) 175 userconfig(); 176 cninit(); /* the preferred console may have changed */ 177 #endif 178 kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count), 179 ptoa(vmstats.v_free_count) / 1024); 180 bufinit(); 181 vm_pager_bufferinit(); 182 #ifdef SMP 183 mp_start(); 184 mp_announce(); 185 #endif 186 cpu_setregs(); 187 } 188 189 /* 190 * Determine i/o configuration for a machine. 191 */ 192 static void 193 configure_first(void *dummy) 194 { 195 } 196 197 static void 198 configure(void *dummy) 199 { 200 /* 201 * Final interrupt support acviation, then enable hardware interrupts. 202 */ 203 MachIntrABI.finalize(); 204 cpu_enable_intr(); 205 206 /* 207 * This will configure all devices, generally starting with the 208 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly 209 * dummies up the attach in order to delay legacy initialization 210 * until after all other busses/subsystems have had a chance 211 * at those resources. 212 */ 213 root_bus_configure(); 214 215 #if NISA > 0 216 /* 217 * Explicitly probe and attach ISA last. The isa bus saves 218 * it's device node at attach time for us here. 219 */ 220 if (isa_bus_device) 221 isa_probe_children(isa_bus_device); 222 #endif 223 224 /* 225 * Allow lowering of the ipl to the lowest kernel level if we 226 * panic (or call tsleep() before clearing `cold'). No level is 227 * completely safe (since a panic may occur in a critical region 228 * at splhigh()), but we want at least bio interrupts to work. 229 */ 230 safepri = TDPRI_KERN_USER; 231 } 232 233 static void 234 configure_final(void *dummy) 235 { 236 cninit_finish(); 237 238 if (bootverbose) 239 kprintf("Device configuration finished.\n"); 240 } 241 242 #ifdef BOOTP 243 void bootpc_init(void); 244 #endif 245 /* 246 * Do legacy root filesystem discovery. 247 */ 248 void 249 cpu_rootconf(void) 250 { 251 #ifdef BOOTP 252 bootpc_init(); 253 #endif 254 #if defined(NFS) && defined(NFS_ROOT) 255 #if !defined(BOOTP_NFSROOT) 256 pxe_setup_nfsdiskless(); 257 if (nfs_diskless_valid) 258 #endif 259 rootdevnames[0] = "nfs:"; 260 #endif 261 #if defined(FFS) && defined(FFS_ROOT) 262 if (!rootdevnames[0]) 263 setroot(); 264 #endif 265 } 266 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL) 267 268 u_long bootdev = 0; /* not a cdev_t - encoding is different */ 269 270 #if defined(FFS) && defined(FFS_ROOT) 271 272 /* 273 * The boot code uses old block device major numbers to pass bootdev to 274 * us. We have to translate these to character device majors because 275 * we don't have block devices any more. 276 */ 277 static int 278 boot_translate_majdev(int bmajor) 279 { 280 static int conv[] = { BOOTMAJOR_CONVARY }; 281 282 if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0])) 283 return(conv[bmajor]); 284 return(-1); 285 } 286 287 /* 288 * Attempt to find the device from which we were booted. 289 * If we can do so, and not instructed not to do so, 290 * set rootdevs[] and rootdevnames[] to correspond to the 291 * boot device(s). 292 * 293 * This code survives in order to allow the system to be 294 * booted from legacy environments that do not correctly 295 * populate the kernel environment. There are significant 296 * restrictions on the bootability of the system in this 297 * situation; it can only be mounting root from a 'da' 298 * 'wd' or 'fd' device, and the root filesystem must be ufs. 299 */ 300 static void 301 setroot(void) 302 { 303 int majdev, mindev, unit, slice, part; 304 cdev_t newrootdev, dev; 305 char partname[2]; 306 char *sname; 307 308 if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) { 309 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev); 310 return; 311 } 312 majdev = boot_translate_majdev(B_TYPE(bootdev)); 313 if (bootverbose) { 314 kprintf("bootdev: %08lx type=%ld unit=%ld " 315 "slice=%ld part=%ld major=%d\n", 316 bootdev, B_TYPE(bootdev), B_UNIT(bootdev), 317 B_SLICE(bootdev), B_PARTITION(bootdev), majdev); 318 } 319 dev = udev2dev(makeudev(majdev, 0), 0); 320 if (!dev_is_good(dev)) 321 return; 322 unit = B_UNIT(bootdev); 323 slice = B_SLICE(bootdev); 324 if (slice == WHOLE_DISK_SLICE) 325 slice = COMPATIBILITY_SLICE; 326 if (slice < 0 || slice >= MAX_SLICES) { 327 kprintf("bad slice\n"); 328 return; 329 } 330 331 part = B_PARTITION(bootdev); 332 mindev = dkmakeminor(unit, slice, part); 333 newrootdev = udev2dev(makeudev(majdev, mindev), 0); 334 if (!dev_is_good(newrootdev)) 335 return; 336 sname = dsname(newrootdev, unit, slice, part, partname); 337 rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 338 ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname); 339 340 /* 341 * For properly dangerously dedicated disks (ones with a historical 342 * bogus partition table), the boot blocks will give slice = 4, but 343 * the kernel will only provide the compatibility slice since it 344 * knows that slice 4 is not a real slice. Arrange to try mounting 345 * the compatibility slice as root if mounting the slice passed by 346 * the boot blocks fails. This handles the dangerously dedicated 347 * case and perhaps others. 348 */ 349 if (slice == COMPATIBILITY_SLICE) 350 return; 351 slice = COMPATIBILITY_SLICE; 352 sname = dsname(newrootdev, unit, slice, part, partname); 353 rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK); 354 ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname); 355 } 356 #endif 357 358 #if defined(NFS) && defined(NFS_ROOT) 359 #if !defined(BOOTP_NFSROOT) 360 361 #include <sys/socket.h> 362 #include <net/if.h> 363 #include <net/if_dl.h> 364 #include <net/if_types.h> 365 #include <net/if_var.h> 366 #include <net/ethernet.h> 367 #include <netinet/in.h> 368 #include <vfs/nfs/rpcv2.h> 369 #include <vfs/nfs/nfsproto.h> 370 #include <vfs/nfs/nfs.h> 371 #include <vfs/nfs/nfsdiskless.h> 372 373 extern struct nfs_diskless nfs_diskless; 374 375 /* 376 * Convert a kenv variable to a sockaddr. If the kenv variable does not 377 * exist the sockaddr will remain zerod out (callers typically just check 378 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 379 */ 380 static int 381 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 382 { 383 u_int32_t a[4]; 384 char *cp; 385 386 bzero(sa, sizeof(*sa)); 387 388 if ((cp = kgetenv(ev)) == NULL) 389 return(1); 390 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 391 return(1); 392 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 393 return(1); 394 /* XXX is this ordering correct? */ 395 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 396 sa->sin_len = sizeof(*sa); 397 sa->sin_family = AF_INET; 398 return(0); 399 } 400 401 static int 402 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 403 { 404 char *cp; 405 u_int32_t a[6]; 406 407 bzero(sa, sizeof(*sa)); 408 sa->sdl_len = sizeof(*sa); 409 sa->sdl_family = AF_LINK; 410 sa->sdl_type = IFT_ETHER; 411 sa->sdl_alen = ETHER_ADDR_LEN; 412 if ((cp = kgetenv(ev)) == NULL) 413 return(1); 414 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 415 return(1); 416 sa->sdl_data[0] = a[0]; 417 sa->sdl_data[1] = a[1]; 418 sa->sdl_data[2] = a[2]; 419 sa->sdl_data[3] = a[3]; 420 sa->sdl_data[4] = a[4]; 421 sa->sdl_data[5] = a[5]; 422 return(0); 423 } 424 425 static int 426 decode_nfshandle(char *ev, u_char *fh) 427 { 428 u_char *cp; 429 int len, val; 430 431 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 432 return(0); 433 len = 0; 434 cp++; 435 for (;;) { 436 if (*cp == 'X') 437 return(len); 438 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 439 return(0); 440 *(fh++) = val; 441 len++; 442 cp += 2; 443 if (len > NFSX_V2FH) 444 return(0); 445 } 446 } 447 448 /* 449 * Populate the essential fields in the nfsv3_diskless structure. 450 * 451 * The loader is expected to export the following environment variables: 452 * 453 * boot.netif.ip IP address on boot interface 454 * boot.netif.netmask netmask on boot interface 455 * boot.netif.gateway default gateway (optional) 456 * boot.netif.hwaddr hardware address of boot interface 457 * boot.netif.name name of boot interface (instead of hw addr) 458 * boot.nfsroot.server IP address of root filesystem server 459 * boot.nfsroot.path path of the root filesystem on server 460 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 461 */ 462 static void 463 pxe_setup_nfsdiskless(void) 464 { 465 struct nfs_diskless *nd = &nfs_diskless; 466 struct ifnet *ifp; 467 struct ifaddr *ifa; 468 struct sockaddr_dl *sdl, ourdl; 469 struct sockaddr_in myaddr, netmask; 470 char *cp; 471 472 /* set up interface */ 473 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 474 return; 475 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 476 kprintf("PXE: no netmask\n"); 477 return; 478 } 479 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 480 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 481 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 482 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 483 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 484 485 if ((cp = kgetenv("boot.netif.name")) != NULL) { 486 TAILQ_FOREACH(ifp, &ifnet, if_link) { 487 if (strcmp(cp, ifp->if_xname) == 0) 488 break; 489 } 490 if (ifp) 491 goto match_done; 492 kprintf("PXE: cannot find interface %s\n", cp); 493 return; 494 } 495 496 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 497 kprintf("PXE: no hardware address\n"); 498 return; 499 } 500 ifa = NULL; 501 TAILQ_FOREACH(ifp, &ifnet, if_link) { 502 struct ifaddr_container *ifac; 503 504 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 505 ifa = ifac->ifa; 506 507 if ((ifa->ifa_addr->sa_family == AF_LINK) && 508 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 509 if ((sdl->sdl_type == ourdl.sdl_type) && 510 (sdl->sdl_alen == ourdl.sdl_alen) && 511 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 512 ourdl.sdl_data + ourdl.sdl_nlen, 513 sdl->sdl_alen)) 514 goto match_done; 515 } 516 } 517 } 518 kprintf("PXE: no interface\n"); 519 return; /* no matching interface */ 520 match_done: 521 strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name)); 522 523 /* set up gateway */ 524 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 525 526 /* XXX set up swap? */ 527 528 /* set up root mount */ 529 nd->root_args.rsize = 8192; /* XXX tunable? */ 530 nd->root_args.wsize = 8192; 531 nd->root_args.sotype = SOCK_STREAM; 532 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT; 533 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 534 kprintf("PXE: no server\n"); 535 return; 536 } 537 nd->root_saddr.sin_port = htons(NFS_PORT); 538 539 /* 540 * A tftp-only loader may pass NFS path information without a 541 * root handle. Generate a warning but continue configuring. 542 */ 543 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 544 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 545 } 546 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 547 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 548 549 nfs_diskless_valid = 1; 550 } 551 552 #endif 553 #endif 554