autoconf.c revision 83651
1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)autoconf.c 7.1 (Berkeley) 5/9/91 37 * $FreeBSD: head/sys/i386/i386/autoconf.c 83651 2001-09-18 23:32:09Z peter $ 38 */ 39 40/* 41 * Setup the system to run on the current machine. 42 * 43 * Configure() is called at boot time and initializes the vba 44 * device tables and the memory controller monitoring. Available 45 * devices are determined (from possibilities mentioned in ioconf.c), 46 * and the drivers are initialized. 47 */ 48#include "opt_bootp.h" 49#include "opt_isa.h" 50#include "opt_nfs.h" 51#include "opt_nfsroot.h" 52#include "opt_bus.h" 53 54#include <sys/param.h> 55#include <sys/systm.h> 56#include <sys/bus.h> 57#include <sys/conf.h> 58#include <sys/disklabel.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 66#if defined(NFSCLIENT) && defined(NFS_ROOT) 67#include <sys/socket.h> 68#include <net/if.h> 69#include <net/if_dl.h> 70#include <net/if_types.h> 71#include <net/if_var.h> 72#include <net/ethernet.h> 73#include <netinet/in.h> 74#include <nfs/rpcv2.h> 75#include <nfs/nfsproto.h> 76#include <nfsclient/nfs.h> 77#include <nfsclient/nfsdiskless.h> 78#endif 79 80#include <machine/bootinfo.h> 81#include <machine/md_var.h> 82#ifdef APIC_IO 83#include <machine/smp.h> 84#else 85#include <i386/isa/icu.h> 86#endif /* APIC_IO */ 87 88#ifdef DEV_ISA 89#include <isa/isavar.h> 90 91device_t isa_bus_device = 0; 92#endif 93 94static void configure_first __P((void *)); 95static void configure __P((void *)); 96static void configure_final __P((void *)); 97 98#if defined(NFSCLIENT) && defined(NFS_ROOT) 99static void pxe_setup_nfsdiskless(void); 100#endif 101 102SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL); 103/* SI_ORDER_SECOND is hookable */ 104SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL); 105/* SI_ORDER_MIDDLE is hookable */ 106SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL); 107 108dev_t rootdev = NODEV; 109dev_t dumpdev = NODEV; 110 111device_t nexus_dev; 112 113/* 114 * Determine i/o configuration for a machine. 115 */ 116static void 117configure_first(dummy) 118 void *dummy; 119{ 120} 121 122static void 123configure(dummy) 124 void *dummy; 125{ 126 127 /* 128 * Activate the ICU's. Note that we are explicitly at splhigh() 129 * at present as we have no way to disable stray PCI level triggered 130 * interrupts until the devices have had a driver attached. This 131 * is particularly a problem when the interrupts are shared. For 132 * example, if IRQ 10 is shared between a disk and network device 133 * and the disk device generates an interrupt, if we "activate" 134 * IRQ 10 when the network driver is set up, then we will get 135 * recursive interrupt 10's as nothing will know how to turn off 136 * the disk device's interrupt. 137 * 138 * Having the ICU's active means we can probe interrupt routing to 139 * see if a device causes the corresponding pending bit to be set. 140 * 141 * This is all rather inconvenient. 142 */ 143#ifdef APIC_IO 144 bsp_apic_configure(); 145 enable_intr(); 146#else 147 enable_intr(); 148 INTREN(IRQ_SLAVE); 149#endif /* APIC_IO */ 150 151 /* nexus0 is the top of the i386 device tree */ 152 device_add_child(root_bus, "nexus", 0); 153 154 /* initialize new bus architecture */ 155 root_bus_configure(); 156 157#ifdef DEV_ISA 158 /* 159 * Explicitly probe and attach ISA last. The isa bus saves 160 * it's device node at attach time for us here. 161 */ 162 if (isa_bus_device) 163 isa_probe_children(isa_bus_device); 164#endif 165 166 /* 167 * Now we're ready to handle (pending) interrupts. 168 * XXX this is slightly misplaced. 169 */ 170 spl0(); 171} 172 173static void 174configure_final(dummy) 175 void *dummy; 176{ 177 int i; 178 179 cninit_finish(); 180 181 if (bootverbose) { 182 183#ifdef APIC_IO 184 imen_dump(); 185#endif /* APIC_IO */ 186 187 /* 188 * Print out the BIOS's idea of the disk geometries. 189 */ 190 printf("BIOS Geometries:\n"); 191 for (i = 0; i < N_BIOS_GEOM; i++) { 192 unsigned long bios_geom; 193 int max_cylinder, max_head, max_sector; 194 195 bios_geom = bootinfo.bi_bios_geom[i]; 196 197 /* 198 * XXX the bootstrap punts a 1200K floppy geometry 199 * when the get-disk-geometry interrupt fails. Skip 200 * drives that have this geometry. 201 */ 202 if (bios_geom == 0x4f010f) 203 continue; 204 205 printf(" %x:%08lx ", i, bios_geom); 206 max_cylinder = bios_geom >> 16; 207 max_head = (bios_geom >> 8) & 0xff; 208 max_sector = bios_geom & 0xff; 209 printf( 210 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n", 211 max_cylinder, max_cylinder + 1, 212 max_head, max_head + 1, 213 max_sector, max_sector); 214 } 215 printf(" %d accounted for\n", bootinfo.bi_n_bios_used); 216 217 printf("Device configuration finished.\n"); 218 } 219 cold = 0; 220} 221 222#ifdef BOOTP 223extern void bootpc_init(void); 224#endif 225/* 226 * Do legacy root filesystem discovery. 227 */ 228void 229cpu_rootconf() 230{ 231#ifdef BOOTP 232 bootpc_init(); 233#endif 234#if defined(NFSCLIENT) && defined(NFS_ROOT) 235#if !defined(BOOTP_NFSROOT) 236 pxe_setup_nfsdiskless(); 237 if (nfs_diskless_valid) 238#endif 239 rootdevnames[0] = "nfs:"; 240#endif 241} 242SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL) 243 244u_long bootdev = 0; /* not a dev_t - encoding is different */ 245 246#if defined(NFSCLIENT) && defined(NFS_ROOT) 247 248static int 249inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa) 250{ 251 u_int32_t a[4]; 252 char *cp; 253 254 bzero(sa, sizeof(*sa)); 255 sa->sin_len = sizeof(*sa); 256 sa->sin_family = AF_INET; 257 258 if ((cp = getenv(ev)) == NULL) 259 return(1); 260 if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4) 261 return(1); 262 /* XXX is this ordering correct? */ 263 sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0]; 264 return(0); 265} 266 267static int 268hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa) 269{ 270 char *cp; 271 u_int32_t a[6]; 272 273 bzero(sa, sizeof(*sa)); 274 sa->sdl_len = sizeof(*sa); 275 sa->sdl_family = AF_LINK; 276 sa->sdl_type = IFT_ETHER; 277 sa->sdl_alen = ETHER_ADDR_LEN; 278 if ((cp = getenv(ev)) == NULL) 279 return(1); 280 if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6) 281 return(1); 282 sa->sdl_data[0] = a[0]; 283 sa->sdl_data[1] = a[1]; 284 sa->sdl_data[2] = a[2]; 285 sa->sdl_data[3] = a[3]; 286 sa->sdl_data[4] = a[4]; 287 sa->sdl_data[5] = a[5]; 288 return(0); 289} 290 291static int 292decode_nfshandle(char *ev, u_char *fh) 293{ 294 u_char *cp; 295 int len, val; 296 297 if (((cp = getenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X')) 298 return(0); 299 len = 0; 300 cp++; 301 for (;;) { 302 if (*cp == 'X') 303 return(len); 304 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff)) 305 return(0); 306 *(fh++) = val; 307 len++; 308 cp += 2; 309 if (len > NFSX_V2FH) 310 return(0); 311 } 312} 313 314/* 315 * Populate the essential fields in the nfsv3_diskless structure. 316 * 317 * The loader is expected to export the following environment variables: 318 * 319 * boot.netif.ip IP address on boot interface 320 * boot.netif.netmask netmask on boot interface 321 * boot.netif.gateway default gateway (optional) 322 * boot.netif.hwaddr hardware address of boot interface 323 * boot.nfsroot.server IP address of root filesystem server 324 * boot.nfsroot.path path of the root filesystem on server 325 * boot.nfsroot.nfshandle NFS handle for root filesystem on server 326 */ 327static void 328pxe_setup_nfsdiskless(void) 329{ 330 struct nfs_diskless *nd = &nfs_diskless; 331 struct ifnet *ifp; 332 struct ifaddr *ifa; 333 struct sockaddr_dl *sdl, ourdl; 334 struct sockaddr_in myaddr, netmask; 335 char *cp; 336 337 /* set up interface */ 338 if (inaddr_to_sockaddr("boot.netif.ip", &myaddr)) 339 return; 340 if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) { 341 printf("PXE: no netmask\n"); 342 return; 343 } 344 bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr)); 345 bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr)); 346 ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr = 347 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr; 348 bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask)); 349 350 if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) { 351 printf("PXE: no hardware address\n"); 352 return; 353 } 354 ifa = NULL; 355 TAILQ_FOREACH(ifp, &ifnet, if_link) { 356 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 357 if ((ifa->ifa_addr->sa_family == AF_LINK) && 358 (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) { 359 if ((sdl->sdl_type == ourdl.sdl_type) && 360 (sdl->sdl_alen == ourdl.sdl_alen) && 361 !bcmp(sdl->sdl_data + sdl->sdl_nlen, 362 ourdl.sdl_data + ourdl.sdl_nlen, 363 sdl->sdl_alen)) 364 goto match_done; 365 } 366 } 367 } 368 printf("PXE: no interface\n"); 369 return; /* no matching interface */ 370match_done: 371 sprintf(nd->myif.ifra_name, "%s%d", ifp->if_name, ifp->if_unit); 372 373 374 /* set up gateway */ 375 inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway); 376 377 /* XXX set up swap? */ 378 379 /* set up root mount */ 380 nd->root_args.rsize = 8192; /* XXX tunable? */ 381 nd->root_args.wsize = 8192; 382 nd->root_args.sotype = SOCK_DGRAM; 383 nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT); 384 if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) { 385 printf("PXE: no server\n"); 386 return; 387 } 388 nd->root_saddr.sin_port = htons(NFS_PORT); 389 if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) { 390 printf("PXE: no NFS handle\n"); 391 return; 392 } 393 if ((cp = getenv("boot.nfsroot.path")) != NULL) 394 strncpy(nd->root_hostnam, cp, MNAMELEN - 1); 395 396 nfs_diskless_valid = 1; 397} 398#endif 399