autoconf.c revision 71785
1251881Speter/*- 2251881Speter * Copyright (c) 1990 The Regents of the University of California. 3251881Speter * All rights reserved. 4251881Speter * 5251881Speter * This code is derived from software contributed to Berkeley by 6251881Speter * William Jolitz. 7251881Speter * 8251881Speter * Redistribution and use in source and binary forms, with or without 9251881Speter * modification, are permitted provided that the following conditions 10251881Speter * are met: 11251881Speter * 1. Redistributions of source code must retain the above copyright 12251881Speter * notice, this list of conditions and the following disclaimer. 13251881Speter * 2. Redistributions in binary form must reproduce the above copyright 14251881Speter * notice, this list of conditions and the following disclaimer in the 15251881Speter * documentation and/or other materials provided with the distribution. 16251881Speter * 3. All advertising materials mentioning features or use of this software 17251881Speter * must display the following acknowledgement: 18251881Speter * This product includes software developed by the University of 19251881Speter * California, Berkeley and its contributors. 20251881Speter * 4. Neither the name of the University nor the names of its contributors 21251881Speter * may be used to endorse or promote products derived from this software 22251881Speter * without specific prior written permission. 23251881Speter * 24251881Speter * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25251881Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26251881Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27251881Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28251881Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29251881Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30251881Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31251881Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32251881Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33251881Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34251881Speter * SUCH DAMAGE. 35251881Speter * 36251881Speter * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 37251881Speter * $FreeBSD: head/sys/i386/i386/autoconf.c 71785 2001-01-29 09:38:39Z peter $ 38251881Speter */ 39251881Speter 40251881Speter/* 41251881Speter * Setup the system to run on the current machine. 42251881Speter * 43251881Speter * Configure() is called at boot time and initializes the vba 44251881Speter * device tables and the memory controller monitoring. Available 45251881Speter * devices are determined (from possibilities mentioned in ioconf.c), 46251881Speter * and the drivers are initialized. 47251881Speter */ 48251881Speter#include "opt_bootp.h" 49251881Speter#include "opt_ffs.h" 50251881Speter#include "opt_cd9660.h" 51251881Speter#include "opt_isa.h" 52251881Speter#include "opt_nfs.h" 53251881Speter#include "opt_nfsroot.h" 54362181Sdim#include "opt_bus.h" 55251881Speter#include "opt_rootdevname.h" 56251881Speter 57251881Speter#include <sys/param.h> 58251881Speter#include <sys/systm.h> 59251881Speter#include <sys/bus.h> 60251881Speter#include <sys/conf.h> 61251881Speter#include <sys/disklabel.h> 62251881Speter#include <sys/diskslice.h> 63251881Speter#include <sys/ipl.h> 64251881Speter#include <sys/reboot.h> 65362181Sdim#include <sys/kernel.h> 66362181Sdim#include <sys/malloc.h> 67251881Speter#include <sys/mount.h> 68251881Speter#include <sys/cons.h> 69362181Sdim 70251881Speter#include <machine/bootinfo.h> 71362181Sdim#include <machine/md_var.h> 72251881Speter#ifdef APIC_IO 73251881Speter#include <machine/smp.h> 74251881Speter#else 75251881Speter#include <i386/isa/icu.h> 76251881Speter#endif /* APIC_IO */ 77251881Speter 78251881Speter#ifdef DEV_ISA 79251881Speter#include <isa/isavar.h> 80251881Speter 81251881Speterdevice_t isa_bus_device = 0; 82251881Speter#endif 83251881Speter 84251881Speterstatic void configure_first __P((void *)); 85251881Speterstatic void configure __P((void *)); 86251881Speterstatic void configure_final __P((void *)); 87251881Speter 88251881Speter#if defined(NFS) && defined(NFS_ROOT) 89251881Speterstatic void pxe_setup_nfsdiskless(void); 90362181Sdim#endif 91251881Speter 92251881SpeterSYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 93251881Speter/* SI_ORDER_SECOND is hookable */ 94251881SpeterSYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 95251881Speter/* SI_ORDER_MIDDLE is hookable */ 96251881SpeterSYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 97251881Speter 98251881Speterdev_t rootdev = NODEV; 99251881Speterdev_t dumpdev = NODEV; 100251881Speter 101251881Speterdevice_t nexus_dev; 102251881Speter 103251881Speter/* 104251881Speter * Determine i/o configuration for a machine. 105251881Speter */ 106251881Speterstatic void 107251881Speterconfigure_first(dummy) 108251881Speter void *dummy; 109251881Speter{ 110251881Speter} 111251881Speter 112251881Speterstatic void 113251881Speterconfigure(dummy) 114251881Speter void *dummy; 115251881Speter{ 116251881Speter 117251881Speter /* 118251881Speter * Activate the ICU's. Note that we are explicitly at splhigh() 119251881Speter * at present as we have no way to disable stray PCI level triggered 120251881Speter * interrupts until the devices have had a driver attached. This 121251881Speter * is particularly a problem when the interrupts are shared. For 122251881Speter * example, if IRQ 10 is shared between a disk and network device 123362181Sdim * and the disk device generates an interrupt, if we "activate" 124251881Speter * IRQ 10 when the network driver is set up, then we will get 125251881Speter * recursive interrupt 10's as nothing will know how to turn off 126251881Speter * the disk device's interrupt. 127251881Speter * 128251881Speter * Having the ICU's active means we can probe interrupt routing to 129251881Speter * see if a device causes the corresponding pending bit to be set. 130251881Speter * 131251881Speter * This is all rather inconvenient. 132251881Speter */ 133251881Speter#ifdef APIC_IO 134251881Speter bsp_apic_configure(); 135251881Speter enable_intr(); 136251881Speter#else 137251881Speter enable_intr(); 138251881Speter INTREN(IRQ_SLAVE); 139251881Speter#endif /* APIC_IO */ 140251881Speter 141251881Speter /* nexus0 is the top of the i386 device tree */ 142251881Speter device_add_child(root_bus, "nexus", 0); 143251881Speter 144251881Speter /* initialize new bus architecture */ 145251881Speter root_bus_configure(); 146251881Speter 147251881Speter#ifdef DEV_ISA 148251881Speter /* 149251881Speter * Explicitly probe and attach ISA last. The isa bus saves 150251881Speter * it's device node at attach time for us here. 151251881Speter */ 152251881Speter if (isa_bus_device) 153251881Speter isa_probe_children(isa_bus_device); 154362181Sdim#endif 155251881Speter 156251881Speter /* 157251881Speter * Now we're ready to handle (pending) interrupts. 158251881Speter * XXX this is slightly misplaced. 159251881Speter */ 160251881Speter spl0(); 161251881Speter} 162251881Speter 163251881Speterstatic void 164251881Speterconfigure_final(dummy) 165251881Speter void *dummy; 166251881Speter{ 167251881Speter int i; 168251881Speter 169251881Speter cninit_finish(); 170251881Speter 171251881Speter if (bootverbose) { 172251881Speter 173251881Speter#ifdef APIC_IO 174251881Speter imen_dump(); 175251881Speter#endif /* APIC_IO */ 176251881Speter 177362181Sdim /* 178251881Speter * Print out the BIOS's idea of the disk geometries. 179251881Speter */ 180251881Speter printf("BIOS Geometries:\n"); 181362181Sdim for (i = 0; i < N_BIOS_GEOM; i++) { 182251881Speter unsigned long bios_geom; 183251881Speter int max_cylinder, max_head, max_sector; 184251881Speter 185251881Speter bios_geom = bootinfo.bi_bios_geom[i]; 186251881Speter 187362181Sdim /* 188251881Speter * XXX the bootstrap punts a 1200K floppy geometry 189251881Speter * when the get-disk-geometry interrupt fails. Skip 190251881Speter * drives that have this geometry. 191251881Speter */ 192 if (bios_geom == 0x4f010f) 193 continue; 194 195 printf(" %x:%08lx ", i, bios_geom); 196 max_cylinder = bios_geom >> 16; 197 max_head = (bios_geom >> 8) & 0xff; 198 max_sector = bios_geom & 0xff; 199 printf( 200 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 201 max_cylinder, max_cylinder + 1, 202 max_head, max_head + 1, 203 max_sector, max_sector); 204 } 205 printf(" %d accounted for\n", bootinfo.bi_n_bios_used); 206 207 printf("Device configuration finished.\n"); 208 } 209 cold = 0; 210} 211 212#ifdef BOOTP 213extern void bootpc_init(void); 214#endif 215/* 216 * Do legacy root filesystem discovery. 217 */ 218void 219cpu_rootconf() 220{ 221#ifdef BOOTP 222 bootpc_init(); 223#endif 224#if defined(NFS) && defined(NFS_ROOT) 225#if !defined(BOOTP_NFSROOT) 226 pxe_setup_nfsdiskless(); 227 if (nfs_diskless_valid) 228#endif 229 rootdevnames[0] = "nfs:"; 230#endif 231} 232SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL) 233 234u_long bootdev = 0; /* not a dev_t - encoding is different */ 235 236#if defined(NFS) && defined(NFS_ROOT) 237 238#include <sys/socket.h> 239#include <net/if.h> 240#include <net/if_dl.h> 241#include <net/if_types.h> 242#include <net/if_var.h> 243#include <net/ethernet.h> 244#include <netinet/in.h> 245#include <nfs/rpcv2.h> 246#include <nfs/nfsproto.h> 247#include <nfs/nfs.h> 248#include <nfs/nfsdiskless.h> 249 250extern struct nfs_diskless nfs_diskless; 251 252static int 253inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 254{ 255 u_int32_t a[4]; 256 char *cp; 257 258 bzero(sa, sizeof(*sa)); 259 sa->sin_len = sizeof(*sa); 260 sa->sin_family = AF_INET; 261 262 if ((cp = getenv(ev)) == NULL) 263 return(1); 264 if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 265 return(1); 266 /* XXX is this ordering correct? */ 267 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 268 return(0); 269} 270 271static int 272hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 273{ 274 char *cp; 275 u_int32_t a[6]; 276 277 bzero(sa, sizeof(*sa)); 278 sa->sdl_len = sizeof(*sa); 279 sa->sdl_family = AF_LINK; 280 sa->sdl_type = IFT_ETHER; 281 sa->sdl_alen = ETHER_ADDR_LEN; 282 if ((cp = getenv(ev)) == NULL) 283 return(1); 284 if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 285 return(1); 286 sa->sdl_data[0] = a[0]; 287 sa->sdl_data[1] = a[1]; 288 sa->sdl_data[2] = a[2]; 289 sa->sdl_data[3] = a[3]; 290 sa->sdl_data[4] = a[4]; 291 sa->sdl_data[5] = a[5]; 292 return(0); 293} 294 295static int 296decode_nfshandle(char *ev, u_char *fh) 297{ 298 u_char *cp; 299 int len, val; 300 301 if (((cp = getenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 302 return(0); 303 len = 0; 304 cp++; 305 for (;;) { 306 if (*cp == 'X') 307 return(len); 308 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 309 return(0); 310 *(fh++) = val; 311 len++; 312 cp += 2; 313 if (len > NFSX_V2FH) 314 return(0); 315 } 316} 317 318/* 319 * Populate the essential fields in the nfsv3_diskless structure. 320 * 321 * The loader is expected to export the following environment variables: 322 * 323 * boot.netif.ip IP address on boot interface 324 * boot.netif.netmask netmask on boot interface 325 * boot.netif.gateway default gateway (optional) 326 * boot.netif.hwaddr hardware address of boot interface 327 * boot.nfsroot.server IP address of root filesystem server 328 * boot.nfsroot.path path of the root filesystem on server 329 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 330 */ 331static void 332pxe_setup_nfsdiskless() 333{ 334 struct nfs_diskless *nd = &nfs_diskless; 335 struct ifnet *ifp; 336 struct ifaddr *ifa; 337 struct sockaddr_dl *sdl, ourdl; 338 struct sockaddr_in myaddr, netmask; 339 char *cp; 340 341 /* set up interface */ 342 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 343 return; 344 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 345 printf("PXE: no netmask\n"); 346 return; 347 } 348 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 349 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 350 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 351 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 352 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 353 354 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 355 printf("PXE: no hardware address\n"); 356 return; 357 } 358 ifa = NULL; 359 ifp = TAILQ_FIRST(&ifnet); 360 TAILQ_FOREACH(ifp, &ifnet, if_link) { 361 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 362 if ((ifa->ifa_addr->sa_family == AF_LINK) && 363 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 364 if ((sdl->sdl_type == ourdl.sdl_type) && 365 (sdl->sdl_alen == ourdl.sdl_alen) && 366 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 367 ourdl.sdl_data + ourdl.sdl_nlen, 368 sdl->sdl_alen)) 369 goto match_done; 370 } 371 } 372 } 373 printf("PXE: no interface\n"); 374 return; /* no matching interface */ 375match_done: 376 sprintf(nd->myif.ifra_name, "%s%d", ifp->if_name, ifp->if_unit); 377 378 379 /* set up gateway */ 380 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 381 382 /* XXX set up swap? */ 383 384 /* set up root mount */ 385 nd->root_args.rsize = 8192; /* XXX tunable? */ 386 nd->root_args.wsize = 8192; 387 nd->root_args.sotype = SOCK_DGRAM; 388 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT); 389 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 390 printf("PXE: no server\n"); 391 return; 392 } 393 nd->root_saddr.sin_port = htons(NFS_PORT); 394 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 395 printf("PXE: no NFS handle\n"); 396 return; 397 } 398 if ((cp = getenv("boot.nfsroot.path")) != NULL) 399 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 400 401 nfs_diskless_valid = 1; 402} 403#endif 404