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. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 34 * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $ 35 */ 36 37 /* 38 * Setup the system to run on the current machine. 39 * 40 * Configure() is called at boot time and initializes the vba 41 * device tables and the memory controller monitoring. Available 42 * devices are determined (from possibilities mentioned in ioconf.c), 43 * and the drivers are initialized. 44 */ 45 #include "opt_bootp.h" 46 #include "opt_cd9660.h" 47 #include "opt_nfs.h" 48 #include "opt_nfsroot.h" 49 #include "opt_rootdevname.h" 50 51 #include "use_isa.h" 52 53 #include <sys/param.h> 54 #include <sys/systm.h> 55 #include <sys/bootmaj.h> 56 #include <sys/bus.h> 57 #include <sys/buf.h> 58 #include <sys/conf.h> 59 #include <sys/diskslice.h> 60 #include <sys/reboot.h> 61 #include <sys/kernel.h> 62 #include <sys/malloc.h> 63 #include <sys/mount.h> 64 #include <sys/cons.h> 65 #include <sys/thread.h> 66 #include <sys/device.h> 67 #include <sys/machintr.h> 68 69 #include <vm/vm_kern.h> 70 #include <vm/vm_extern.h> 71 #include <vm/vm_pager.h> 72 73 #if 0 74 #include <machine/pcb.h> 75 #include <machine/pcb_ext.h> 76 #endif 77 #include <machine/smp.h> 78 #include <machine/globaldata.h> 79 #include <machine/md_var.h> 80 81 #define MAXBUFSTRUCTSIZE ((size_t)512 * 1024 * 1024) 82 83 #if NISA > 0 84 #include <bus/isa/isavar.h> 85 86 device_t isa_bus_device = NULL; 87 #endif 88 89 static void cpu_startup (void *); 90 static void configure_first (void *); 91 static void configure (void *); 92 static void configure_final (void *); 93 94 #if defined(NFS) && defined(NFS_ROOT) 95 #if !defined(BOOTP_NFSROOT) 96 static void pxe_setup_nfsdiskless(void); 97 #endif 98 #endif 99 100 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 101 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 102 /* SI_ORDER_SECOND is hookable */ 103 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 104 /* SI_ORDER_MIDDLE is hookable */ 105 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 106 107 cdev_t rootdev = NULL; 108 cdev_t dumpdev = NULL; 109 110 /* 111 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to 112 * be able to max-out a GigE link if the server supports it. Many servers 113 * do not so the default is 8192. 114 * 115 * nfsroot.rahead defaults to something reasonable, can be overridden. 116 */ 117 static int nfsroot_iosize = 8192; 118 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize); 119 static int nfsroot_rahead = 4; 120 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead); 121 122 /* 123 * 124 */ 125 static void 126 cpu_startup(void *dummy) 127 { 128 vm_offset_t buffer_sva; 129 vm_offset_t buffer_eva; 130 vm_offset_t pager_sva; 131 vm_offset_t pager_eva; 132 133 kprintf("%s", version); 134 kprintf("real memory = %ju (%juK bytes)\n", 135 (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024)); 136 137 if (nbuf == 0) { 138 long factor = NBUFCALCSIZE / 1024; /* KB/nbuf */ 139 long kbytes = physmem * (PAGE_SIZE / 1024); /* physmem */ 140 141 nbuf = 50; 142 143 if (kbytes > 128 * 1024) 144 nbuf += (kbytes - 128 * 1024) / (factor * 20); 145 if (maxbcache && nbuf > maxbcache / NBUFCALCSIZE) 146 nbuf = maxbcache / NBUFCALCSIZE; 147 148 if ((size_t)nbuf * sizeof(struct buf) > MAXBUFSTRUCTSIZE) { 149 kprintf("Warning: nbuf capped at %ld due to the " 150 "reasonability limit\n", nbuf); 151 nbuf = MAXBUFSTRUCTSIZE / sizeof(struct buf); 152 } 153 } 154 155 if (nbuf > (virtual_end - virtual_start) / (MAXBSIZE * 4)) { 156 nbuf = (virtual_end - virtual_start) / (MAXBSIZE * 4); 157 kprintf("Warning: nbufs capped at %ld for " 158 "valloc considerations\n", nbuf); 159 } 160 161 nswbuf_mem = lmax(lmin(nbuf / 32, 32), 4); 162 #ifdef NSWBUF_MIN 163 if (nswbuf_mem < NSWBUF_MIN) 164 nswbuf_mem = NSWBUF_MIN; 165 #endif 166 nswbuf_kva = lmax(lmin(nbuf / 4, 256), 16); 167 #ifdef NSWBUF_MIN 168 if (nswbuf_kva < NSWBUF_MIN) 169 nswbuf_kva = NSWBUF_MIN; 170 #endif 171 172 /* 173 * Allocate memory for the buffer cache 174 */ 175 buf = (void *)kmem_alloc(kernel_map, 176 nbuf * sizeof(struct buf), 177 VM_SUBSYS_BUF); 178 swbuf_mem = (void *)kmem_alloc(kernel_map, 179 nswbuf_mem * sizeof(struct buf), 180 VM_SUBSYS_BUF); 181 swbuf_kva = (void *)kmem_alloc(kernel_map, 182 nswbuf_kva * sizeof(struct buf), 183 VM_SUBSYS_BUF); 184 185 kmem_suballoc(kernel_map, clean_map, &clean_sva, &clean_eva, 186 (nbuf * MAXBSIZE * 2) + 187 (nswbuf_mem + nswbuf_kva) * MAXPHYS + 188 pager_map_size); 189 kmem_suballoc(clean_map, buffer_map, &buffer_sva, &buffer_eva, 190 (nbuf * MAXBSIZE * 2)); 191 buffer_map->system_map = 1; 192 kmem_suballoc(clean_map, pager_map, &pager_sva, &pager_eva, 193 (nswbuf_mem + nswbuf_kva) * MAXPHYS + 194 pager_map_size); 195 pager_map->system_map = 1; 196 kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count), 197 ptoa(vmstats.v_free_count) / 1024); 198 mp_start(); 199 mp_announce(); 200 cpu_setregs(); 201 } 202 203 /* 204 * Determine i/o configuration for a machine. 205 */ 206 static void 207 configure_first(void *dummy) 208 { 209 } 210 211 static void 212 configure(void *dummy) 213 { 214 /* 215 * Final interrupt support acviation, then enable hardware interrupts. 216 */ 217 MachIntrABI.finalize(); 218 cpu_enable_intr(); 219 220 /* 221 * This will configure all devices, generally starting with the 222 * nexus (pc64/x86_64/nexus.c). The nexus ISA code explicitly 223 * dummies up the attach in order to delay legacy initialization 224 * until after all other busses/subsystems have had a chance 225 * at those resources. 226 */ 227 root_bus_configure(); 228 229 #if NISA > 0 230 /* 231 * Explicitly probe and attach ISA last. The isa bus saves 232 * it's device node at attach time for us here. 233 */ 234 if (isa_bus_device) 235 isa_probe_children(isa_bus_device); 236 #endif 237 238 /* 239 * Allow lowering of the ipl to the lowest kernel level if we 240 * panic (or call tsleep() before clearing `cold'). No level is 241 * completely safe (since a panic may occur in a critical region 242 * at splhigh()), but we want at least bio interrupts to work. 243 */ 244 safepri = TDPRI_KERN_USER; 245 } 246 247 /* 248 * Finalize configure. Reprobe for the console, in case it was one 249 * of the devices which attached, then finish console initialization. 250 */ 251 static void 252 configure_final(void *dummy) 253 { 254 cninit(); 255 cninit_finish(); 256 257 if (bootverbose) 258 kprintf("Device configuration finished.\n"); 259 } 260 261 #ifdef BOOTP 262 void bootpc_init(void); 263 #endif 264 /* 265 * Do legacy root filesystem discovery. 266 */ 267 void 268 cpu_rootconf(void) 269 { 270 #ifdef BOOTP 271 bootpc_init(); 272 #endif 273 #if defined(NFS) && defined(NFS_ROOT) 274 #if !defined(BOOTP_NFSROOT) 275 pxe_setup_nfsdiskless(); 276 if (nfs_diskless_valid) 277 #endif 278 rootdevnames[0] = "nfs:"; 279 #endif 280 } 281 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL); 282 283 #if defined(NFS) && defined(NFS_ROOT) 284 #if !defined(BOOTP_NFSROOT) 285 286 #include <sys/socket.h> 287 #include <net/if.h> 288 #include <net/if_dl.h> 289 #include <net/if_types.h> 290 #include <net/if_var.h> 291 #include <net/ethernet.h> 292 #include <netinet/in.h> 293 #include <vfs/nfs/rpcv2.h> 294 #include <vfs/nfs/nfsproto.h> 295 #include <vfs/nfs/nfs.h> 296 #include <vfs/nfs/nfsdiskless.h> 297 298 extern struct nfs_diskless nfs_diskless; 299 300 /* 301 * Convert a kenv variable to a sockaddr. If the kenv variable does not 302 * exist the sockaddr will remain zerod out (callers typically just check 303 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 304 */ 305 static int 306 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 307 { 308 u_int32_t a[4]; 309 char *cp; 310 311 bzero(sa, sizeof(*sa)); 312 313 if ((cp = kgetenv(ev)) == NULL) 314 return(1); 315 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 316 return(1); 317 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 318 return(1); 319 /* XXX is this ordering correct? */ 320 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 321 sa->sin_len = sizeof(*sa); 322 sa->sin_family = AF_INET; 323 return(0); 324 } 325 326 static int 327 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 328 { 329 char *cp; 330 u_int32_t a[6]; 331 332 bzero(sa, sizeof(*sa)); 333 sa->sdl_len = sizeof(*sa); 334 sa->sdl_family = AF_LINK; 335 sa->sdl_type = IFT_ETHER; 336 sa->sdl_alen = ETHER_ADDR_LEN; 337 if ((cp = kgetenv(ev)) == NULL) 338 return(1); 339 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 340 return(1); 341 sa->sdl_data[0] = a[0]; 342 sa->sdl_data[1] = a[1]; 343 sa->sdl_data[2] = a[2]; 344 sa->sdl_data[3] = a[3]; 345 sa->sdl_data[4] = a[4]; 346 sa->sdl_data[5] = a[5]; 347 return(0); 348 } 349 350 static int 351 decode_nfshandle(char *ev, u_char *fh) 352 { 353 u_char *cp; 354 int len, val; 355 356 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 357 return(0); 358 len = 0; 359 cp++; 360 for (;;) { 361 if (*cp == 'X') 362 return(len); 363 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 364 return(0); 365 *(fh++) = val; 366 len++; 367 cp += 2; 368 if (len > NFSX_V2FH) 369 return(0); 370 } 371 } 372 373 /* 374 * Populate the essential fields in the nfsv3_diskless structure. 375 * 376 * The loader is expected to export the following environment variables: 377 * 378 * boot.netif.ip IP address on boot interface 379 * boot.netif.netmask netmask on boot interface 380 * boot.netif.gateway default gateway (optional) 381 * boot.netif.hwaddr hardware address of boot interface 382 * boot.netif.name name of boot interface (instead of hw addr) 383 * boot.nfsroot.server IP address of root filesystem server 384 * boot.nfsroot.path path of the root filesystem on server 385 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 386 */ 387 static void 388 pxe_setup_nfsdiskless(void) 389 { 390 struct nfs_diskless *nd = &nfs_diskless; 391 struct ifnet *ifp; 392 struct ifaddr *ifa; 393 struct sockaddr_dl *sdl, ourdl; 394 struct sockaddr_in myaddr, netmask; 395 char *cp; 396 397 /* set up interface */ 398 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 399 return; 400 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 401 kprintf("PXE: no netmask\n"); 402 return; 403 } 404 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 405 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 406 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 407 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 408 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 409 410 if ((cp = kgetenv("boot.netif.name")) != NULL) { 411 ifnet_lock(); 412 ifp = ifunit(cp); 413 if (ifp) { 414 strlcpy(nd->myif.ifra_name, ifp->if_xname, 415 sizeof(nd->myif.ifra_name)); 416 ifnet_unlock(); 417 goto match_done; 418 } 419 ifnet_unlock(); 420 kprintf("PXE: cannot find interface %s\n", cp); 421 return; 422 } 423 424 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 425 kprintf("PXE: no hardware address\n"); 426 return; 427 } 428 ifa = NULL; 429 ifnet_lock(); 430 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 431 struct ifaddr_container *ifac; 432 433 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 434 ifa = ifac->ifa; 435 436 if ((ifa->ifa_addr->sa_family == AF_LINK) && 437 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 438 if ((sdl->sdl_type == ourdl.sdl_type) && 439 (sdl->sdl_alen == ourdl.sdl_alen) && 440 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 441 ourdl.sdl_data + ourdl.sdl_nlen, 442 sdl->sdl_alen)) { 443 strlcpy(nd->myif.ifra_name, 444 ifp->if_xname, 445 sizeof(nd->myif.ifra_name)); 446 ifnet_unlock(); 447 goto match_done; 448 } 449 } 450 } 451 } 452 ifnet_unlock(); 453 kprintf("PXE: no interface\n"); 454 return; /* no matching interface */ 455 match_done: 456 /* set up gateway */ 457 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 458 459 /* XXX set up swap? */ 460 461 /* set up root mount */ 462 nd->root_args.rsize = nfsroot_iosize; 463 nd->root_args.wsize = nfsroot_iosize; 464 nd->root_args.sotype = SOCK_STREAM; 465 nd->root_args.readahead = nfsroot_rahead; 466 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT | 467 NFSMNT_READAHEAD; 468 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 469 kprintf("PXE: no server\n"); 470 return; 471 } 472 nd->root_saddr.sin_port = htons(NFS_PORT); 473 474 /* 475 * A tftp-only loader may pass NFS path information without a 476 * root handle. Generate a warning but continue configuring. 477 */ 478 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 479 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 480 } 481 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 482 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 483 484 nfs_diskless_valid = 1; 485 } 486 487 #endif 488 #endif 489