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 #if NISA > 0 82 #include <bus/isa/isavar.h> 83 84 device_t isa_bus_device = NULL; 85 #endif 86 87 static void cpu_startup (void *); 88 static void configure_first (void *); 89 static void configure (void *); 90 static void configure_final (void *); 91 92 #if defined(NFS) && defined(NFS_ROOT) 93 #if !defined(BOOTP_NFSROOT) 94 static void pxe_setup_nfsdiskless(void); 95 #endif 96 #endif 97 98 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL); 99 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 100 /* SI_ORDER_SECOND is hookable */ 101 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 102 /* SI_ORDER_MIDDLE is hookable */ 103 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 104 105 cdev_t rootdev = NULL; 106 cdev_t dumpdev = NULL; 107 108 /* 109 * nfsroot.iosize may be set in loader.conf, 32768 is recommended to 110 * be able to max-out a GigE link if the server supports it. Many servers 111 * do not so the default is 8192. 112 * 113 * nfsroot.rahead defaults to something reasonable, can be overridden. 114 */ 115 static int nfsroot_iosize = 8192; 116 TUNABLE_INT("nfsroot.iosize", &nfsroot_iosize); 117 static int nfsroot_rahead = 4; 118 TUNABLE_INT("nfsroot.rahead", &nfsroot_rahead); 119 120 /* 121 * 122 */ 123 static void 124 cpu_startup(void *dummy) 125 { 126 vm_offset_t buffer_sva; 127 vm_offset_t buffer_eva; 128 vm_offset_t pager_sva; 129 vm_offset_t pager_eva; 130 131 kprintf("%s", version); 132 kprintf("real memory = %ju (%juK bytes)\n", 133 (uintmax_t)ptoa(Maxmem), (uintmax_t)(ptoa(Maxmem) / 1024)); 134 135 if (nbuf == 0) { 136 int factor = 4 * NBUFCALCSIZE / 1024; 137 int kbytes = Maxmem * (PAGE_SIZE / 1024); 138 139 nbuf = 50; 140 if (kbytes > 4096) 141 nbuf += min((kbytes - 4096) / factor, 65536 / factor); 142 if (kbytes > 65536) 143 nbuf += (kbytes - 65536) * 2 / (factor * 5); 144 if (maxbcache && nbuf > maxbcache / NBUFCALCSIZE) 145 nbuf = maxbcache / NBUFCALCSIZE; 146 } 147 if (nbuf > (virtual_end - virtual_start) / (MAXBSIZE * 2)) { 148 nbuf = (virtual_end - virtual_start) / (MAXBSIZE * 2); 149 kprintf("Warning: nbufs capped at %ld\n", nbuf); 150 } 151 152 nswbuf_mem = lmax(lmin(nbuf / 32, 32), 4); 153 #ifdef NSWBUF_MIN 154 if (nswbuf_mem < NSWBUF_MIN) 155 nswbuf_mem = NSWBUF_MIN; 156 #endif 157 nswbuf_kva = lmax(lmin(nbuf / 4, 256), 16); 158 #ifdef NSWBUF_MIN 159 if (nswbuf_kva < NSWBUF_MIN) 160 nswbuf_kva = NSWBUF_MIN; 161 #endif 162 163 /* 164 * Allocate memory for the buffer cache 165 */ 166 buf = (void *)kmem_alloc(&kernel_map, 167 nbuf * sizeof(struct buf), 168 VM_SUBSYS_BUF); 169 swbuf_mem = (void *)kmem_alloc(&kernel_map, 170 nswbuf_mem * sizeof(struct buf), 171 VM_SUBSYS_BUF); 172 swbuf_kva = (void *)kmem_alloc(&kernel_map, 173 nswbuf_kva * sizeof(struct buf), 174 VM_SUBSYS_BUF); 175 176 kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva, 177 (nbuf * MAXBSIZE * 2) + 178 (nswbuf_mem + nswbuf_kva) *MAXPHYS + 179 pager_map_size); 180 kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva, 181 (nbuf * MAXBSIZE * 2)); 182 buffer_map.system_map = 1; 183 kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva, 184 (nswbuf_mem + nswbuf_kva) *MAXPHYS + 185 pager_map_size); 186 pager_map.system_map = 1; 187 kprintf("avail memory = %lu (%luK bytes)\n", ptoa(vmstats.v_free_count), 188 ptoa(vmstats.v_free_count) / 1024); 189 mp_start(); 190 mp_announce(); 191 cpu_setregs(); 192 } 193 194 /* 195 * Determine i/o configuration for a machine. 196 */ 197 static void 198 configure_first(void *dummy) 199 { 200 } 201 202 static void 203 configure(void *dummy) 204 { 205 /* 206 * Final interrupt support acviation, then enable hardware interrupts. 207 */ 208 MachIntrABI.finalize(); 209 cpu_enable_intr(); 210 211 /* 212 * This will configure all devices, generally starting with the 213 * nexus (i386/i386/nexus.c). The nexus ISA code explicitly 214 * dummies up the attach in order to delay legacy initialization 215 * until after all other busses/subsystems have had a chance 216 * at those resources. 217 */ 218 root_bus_configure(); 219 220 #if NISA > 0 221 /* 222 * Explicitly probe and attach ISA last. The isa bus saves 223 * it's device node at attach time for us here. 224 */ 225 if (isa_bus_device) 226 isa_probe_children(isa_bus_device); 227 #endif 228 229 /* 230 * Allow lowering of the ipl to the lowest kernel level if we 231 * panic (or call tsleep() before clearing `cold'). No level is 232 * completely safe (since a panic may occur in a critical region 233 * at splhigh()), but we want at least bio interrupts to work. 234 */ 235 safepri = TDPRI_KERN_USER; 236 } 237 238 static void 239 configure_final(void *dummy) 240 { 241 cninit_finish(); 242 243 if (bootverbose) 244 kprintf("Device configuration finished.\n"); 245 } 246 247 #ifdef BOOTP 248 void bootpc_init(void); 249 #endif 250 /* 251 * Do legacy root filesystem discovery. 252 */ 253 void 254 cpu_rootconf(void) 255 { 256 #ifdef BOOTP 257 bootpc_init(); 258 #endif 259 #if defined(NFS) && defined(NFS_ROOT) 260 #if !defined(BOOTP_NFSROOT) 261 pxe_setup_nfsdiskless(); 262 if (nfs_diskless_valid) 263 #endif 264 rootdevnames[0] = "nfs:"; 265 #endif 266 } 267 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL); 268 269 #if defined(NFS) && defined(NFS_ROOT) 270 #if !defined(BOOTP_NFSROOT) 271 272 #include <sys/socket.h> 273 #include <net/if.h> 274 #include <net/if_dl.h> 275 #include <net/if_types.h> 276 #include <net/if_var.h> 277 #include <net/ethernet.h> 278 #include <netinet/in.h> 279 #include <vfs/nfs/rpcv2.h> 280 #include <vfs/nfs/nfsproto.h> 281 #include <vfs/nfs/nfs.h> 282 #include <vfs/nfs/nfsdiskless.h> 283 284 extern struct nfs_diskless nfs_diskless; 285 286 /* 287 * Convert a kenv variable to a sockaddr. If the kenv variable does not 288 * exist the sockaddr will remain zerod out (callers typically just check 289 * sin_len). A network address of 0.0.0.0 is equivalent to failure. 290 */ 291 static int 292 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 293 { 294 u_int32_t a[4]; 295 char *cp; 296 297 bzero(sa, sizeof(*sa)); 298 299 if ((cp = kgetenv(ev)) == NULL) 300 return(1); 301 if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 302 return(1); 303 if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0) 304 return(1); 305 /* XXX is this ordering correct? */ 306 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 307 sa->sin_len = sizeof(*sa); 308 sa->sin_family = AF_INET; 309 return(0); 310 } 311 312 static int 313 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 314 { 315 char *cp; 316 u_int32_t a[6]; 317 318 bzero(sa, sizeof(*sa)); 319 sa->sdl_len = sizeof(*sa); 320 sa->sdl_family = AF_LINK; 321 sa->sdl_type = IFT_ETHER; 322 sa->sdl_alen = ETHER_ADDR_LEN; 323 if ((cp = kgetenv(ev)) == NULL) 324 return(1); 325 if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 326 return(1); 327 sa->sdl_data[0] = a[0]; 328 sa->sdl_data[1] = a[1]; 329 sa->sdl_data[2] = a[2]; 330 sa->sdl_data[3] = a[3]; 331 sa->sdl_data[4] = a[4]; 332 sa->sdl_data[5] = a[5]; 333 return(0); 334 } 335 336 static int 337 decode_nfshandle(char *ev, u_char *fh) 338 { 339 u_char *cp; 340 int len, val; 341 342 if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 343 return(0); 344 len = 0; 345 cp++; 346 for (;;) { 347 if (*cp == 'X') 348 return(len); 349 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 350 return(0); 351 *(fh++) = val; 352 len++; 353 cp += 2; 354 if (len > NFSX_V2FH) 355 return(0); 356 } 357 } 358 359 /* 360 * Populate the essential fields in the nfsv3_diskless structure. 361 * 362 * The loader is expected to export the following environment variables: 363 * 364 * boot.netif.ip IP address on boot interface 365 * boot.netif.netmask netmask on boot interface 366 * boot.netif.gateway default gateway (optional) 367 * boot.netif.hwaddr hardware address of boot interface 368 * boot.netif.name name of boot interface (instead of hw addr) 369 * boot.nfsroot.server IP address of root filesystem server 370 * boot.nfsroot.path path of the root filesystem on server 371 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 372 */ 373 static void 374 pxe_setup_nfsdiskless(void) 375 { 376 struct nfs_diskless *nd = &nfs_diskless; 377 struct ifnet *ifp; 378 struct ifaddr *ifa; 379 struct sockaddr_dl *sdl, ourdl; 380 struct sockaddr_in myaddr, netmask; 381 char *cp; 382 383 /* set up interface */ 384 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 385 return; 386 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 387 kprintf("PXE: no netmask\n"); 388 return; 389 } 390 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 391 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 392 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 393 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 394 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 395 396 if ((cp = kgetenv("boot.netif.name")) != NULL) { 397 ifnet_lock(); 398 ifp = ifunit(cp); 399 if (ifp) { 400 strlcpy(nd->myif.ifra_name, ifp->if_xname, 401 sizeof(nd->myif.ifra_name)); 402 ifnet_unlock(); 403 goto match_done; 404 } 405 ifnet_unlock(); 406 kprintf("PXE: cannot find interface %s\n", cp); 407 return; 408 } 409 410 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 411 kprintf("PXE: no hardware address\n"); 412 return; 413 } 414 ifa = NULL; 415 ifnet_lock(); 416 TAILQ_FOREACH(ifp, &ifnetlist, if_link) { 417 struct ifaddr_container *ifac; 418 419 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) { 420 ifa = ifac->ifa; 421 422 if ((ifa->ifa_addr->sa_family == AF_LINK) && 423 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 424 if ((sdl->sdl_type == ourdl.sdl_type) && 425 (sdl->sdl_alen == ourdl.sdl_alen) && 426 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 427 ourdl.sdl_data + ourdl.sdl_nlen, 428 sdl->sdl_alen)) { 429 strlcpy(nd->myif.ifra_name, 430 ifp->if_xname, 431 sizeof(nd->myif.ifra_name)); 432 ifnet_unlock(); 433 goto match_done; 434 } 435 } 436 } 437 } 438 ifnet_unlock(); 439 kprintf("PXE: no interface\n"); 440 return; /* no matching interface */ 441 match_done: 442 /* set up gateway */ 443 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 444 445 /* XXX set up swap? */ 446 447 /* set up root mount */ 448 nd->root_args.rsize = nfsroot_iosize; 449 nd->root_args.wsize = nfsroot_iosize; 450 nd->root_args.sotype = SOCK_STREAM; 451 nd->root_args.readahead = nfsroot_rahead; 452 nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT | 453 NFSMNT_READAHEAD; 454 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 455 kprintf("PXE: no server\n"); 456 return; 457 } 458 nd->root_saddr.sin_port = htons(NFS_PORT); 459 460 /* 461 * A tftp-only loader may pass NFS path information without a 462 * root handle. Generate a warning but continue configuring. 463 */ 464 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 465 kprintf("PXE: Warning, no NFS handle passed from loader\n"); 466 } 467 if ((cp = kgetenv("boot.nfsroot.path")) != NULL) 468 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 469 470 nfs_diskless_valid = 1; 471 } 472 473 #endif 474 #endif 475