sys/platform/pc32/i386/autoconf.c

   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: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
  38  * $DragonFly: src/sys/platform/pc32/i386/autoconf.c,v 1.30 2006/11/07 06:43:24 dillon 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/conf.h>
  64 #include <sys/disklabel.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 <machine/bootinfo.h>
  76 #include <machine/ipl.h>
  77 #include <machine/md_var.h>
  78 #include <machine/smp.h>
  79 #include <machine_base/icu/icu.h>
  80
  81 #include <machine/pcb.h>
  82 #include <machine/pcb_ext.h>
  83 #include <machine/vm86.h>
  84 #include <machine/globaldata.h>
  85
  86 #if NISA > 0
  87 #include <bus/isa/isavar.h>
  88
  89 device_t isa_bus_device = 0;
  90 #endif
  91
  92 static void     configure_first (void *);
  93 static void     configure (void *);
  94 static void     configure_final (void *);
  95
  96 #if defined(FFS) && defined(FFS_ROOT)
  97 static void     setroot (void);
  98 #endif
  99
 100 #if defined(NFS) && defined(NFS_ROOT)
 101 #if !defined(BOOTP_NFSROOT)
 102 static void     pxe_setup_nfsdiskless(void);
 103 #endif
 104 #endif
 105
 106 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 107 /* SI_ORDER_SECOND is hookable */
 108 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 109 /* SI_ORDER_MIDDLE is hookable */
 110 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 111
 112 cdev_t  rootdev = NOCDEV;
 113 cdev_t  dumpdev = NOCDEV;
 114
 115 /*
 116  * Determine i/o configuration for a machine.
 117  */
 118 static void
 119 configure_first(void *dummy)
 120 {
 121 }
 122
 123 static void
 124 configure(void *dummy)
 125 {
 126         /*
 127          * Final interrupt support acviation, then enable hardware interrupts.
 128          */
 129         MachIntrABI.finalize();
 130         cpu_enable_intr();
 131
 132         /*
 133          * This will configure all devices, generally starting with the
 134          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 135          * dummies up the attach in order to delay legacy initialization
 136          * until after all other busses/subsystems have had a chance
 137          * at those resources.
 138          */
 139         root_bus_configure();
 140
 141 #if NISA > 0
 142         /*
 143          * Explicitly probe and attach ISA last.  The isa bus saves
 144          * it's device node at attach time for us here.
 145          */
 146         if (isa_bus_device)
 147                 isa_probe_children(isa_bus_device);
 148 #endif
 149
 150         /*
 151          * Allow lowering of the ipl to the lowest kernel level if we
 152          * panic (or call tsleep() before clearing `cold').  No level is
 153          * completely safe (since a panic may occur in a critical region
 154          * at splhigh()), but we want at least bio interrupts to work.
 155          */
 156         safepri = TDPRI_KERN_USER;
 157 }
 158
 159 static void
 160 configure_final(void *dummy)
 161 {
 162         int i;
 163
 164         cninit_finish();
 165
 166         if (bootverbose) {
 167 #ifdef APIC_IO
 168                 imen_dump();
 169 #endif /* APIC_IO */
 170
 171                 /*
 172                  * Print out the BIOS's idea of the disk geometries.
 173                  */
 174                 printf("BIOS Geometries:\n");
 175                 for (i = 0; i < N_BIOS_GEOM; i++) {
 176                         unsigned long bios_geom;
 177                         int max_cylinder, max_head, max_sector;
 178
 179                         bios_geom = bootinfo.bi_bios_geom[i];
 180
 181                         /*
 182                          * XXX the bootstrap punts a 1200K floppy geometry
 183                          * when the get-disk-geometry interrupt fails.  Skip
 184                          * drives that have this geometry.
 185                          */
 186                         if (bios_geom == 0x4f010f)
 187                                 continue;
 188
 189                         printf(" %x:%08lx ", i, bios_geom);
 190                         max_cylinder = bios_geom >> 16;
 191                         max_head = (bios_geom >> 8) & 0xff;
 192                         max_sector = bios_geom & 0xff;
 193                         printf(
 194                 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
 195                                max_cylinder, max_cylinder + 1,
 196                                max_head, max_head + 1,
 197                                max_sector, max_sector);
 198                 }
 199                 printf(" %d accounted for\n", bootinfo.bi_n_bios_used);
 200
 201                 printf("Device configuration finished.\n");
 202         }
 203         cold = 0;
 204 }
 205
 206 #ifdef BOOTP
 207 void bootpc_init(void);
 208 #endif
 209 /*
 210  * Do legacy root filesystem discovery.
 211  */
 212 void
 213 cpu_rootconf(void)
 214 {
 215 #ifdef BOOTP
 216         bootpc_init();
 217 #endif
 218 #if defined(NFS) && defined(NFS_ROOT)
 219 #if !defined(BOOTP_NFSROOT)
 220         pxe_setup_nfsdiskless();
 221         if (nfs_diskless_valid)
 222 #endif
 223                 rootdevnames[0] = "nfs:";
 224 #endif
 225 #if defined(FFS) && defined(FFS_ROOT)
 226         if (!rootdevnames[0])
 227                 setroot();
 228 #endif
 229 }
 230 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 231
 232 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 233
 234 #if defined(FFS) && defined(FFS_ROOT)
 235 #define FDMAJOR         2
 236 #define FDUNITSHIFT     6
 237
 238 /*
 239  * The boot code uses old block device major numbers to pass bootdev to
 240  * us.  We have to translate these to character device majors because
 241  * we don't have block devices any more.
 242  */
 243 static int
 244 boot_translate_majdev(int bmajor)
 245 {
 246         static int conv[] = { BOOTMAJOR_CONVARY };
 247
 248         if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
 249                 return(conv[bmajor]);
 250         return(-1);
 251 }
 252
 253 /*
 254  * Attempt to find the device from which we were booted.
 255  * If we can do so, and not instructed not to do so,
 256  * set rootdevs[] and rootdevnames[] to correspond to the
 257  * boot device(s).
 258  *
 259  * This code survives in order to allow the system to be
 260  * booted from legacy environments that do not correctly
 261  * populate the kernel environment. There are significant
 262  * restrictions on the bootability of the system in this
 263  * situation; it can only be mounting root from a 'da'
 264  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 265  */
 266 static void
 267 setroot(void)
 268 {
 269         int majdev, mindev, unit, slice, part;
 270         cdev_t newrootdev, dev;
 271         char partname[2];
 272         char *sname;
 273
 274         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 275                 printf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 276                 return;
 277         }
 278         majdev = boot_translate_majdev(B_TYPE(bootdev));
 279         if (bootverbose) {
 280                 printf("bootdev: %08lx type=%ld unit=%ld "
 281                         "slice=%ld part=%ld major=%d\n",
 282                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 283                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 284         }
 285         dev = udev2dev(makeudev(majdev, 0), 0);
 286         if (!dev_is_good(dev))
 287                 return;
 288         unit = B_UNIT(bootdev);
 289         slice = B_SLICE(bootdev);
 290         if (slice == WHOLE_DISK_SLICE)
 291                 slice = COMPATIBILITY_SLICE;
 292         if (slice < 0 || slice >= MAX_SLICES) {
 293                 printf("bad slice\n");
 294                 return;
 295         }
 296
 297         /*
 298          * XXX kludge for inconsistent unit numbering and lack of slice
 299          * support for floppies.
 300          */
 301         if (majdev == FD_CDEV_MAJOR) {
 302                 slice = COMPATIBILITY_SLICE;
 303                 part = RAW_PART;
 304                 mindev = unit << FDUNITSHIFT;
 305         } else {
 306                 part = B_PARTITION(bootdev);
 307                 mindev = dkmakeminor(unit, slice, part);
 308         }
 309         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 310         if (!dev_is_good(newrootdev))
 311                 return;
 312         sname = dsname(newrootdev, unit, slice, part, partname);
 313         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 314         sprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 315
 316         /*
 317          * For properly dangerously dedicated disks (ones with a historical
 318          * bogus partition table), the boot blocks will give slice = 4, but
 319          * the kernel will only provide the compatibility slice since it
 320          * knows that slice 4 is not a real slice.  Arrange to try mounting
 321          * the compatibility slice as root if mounting the slice passed by
 322          * the boot blocks fails.  This handles the dangerously dedicated
 323          * case and perhaps others.
 324          */
 325         if (slice == COMPATIBILITY_SLICE)
 326                 return;
 327         slice = COMPATIBILITY_SLICE;
 328         sname = dsname(newrootdev, unit, slice, part, partname);
 329         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 330         sprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 331 }
 332 #endif
 333
 334 #if defined(NFS) && defined(NFS_ROOT)
 335 #if !defined(BOOTP_NFSROOT)
 336
 337 #include <sys/socket.h>
 338 #include <net/if.h>
 339 #include <net/if_dl.h>
 340 #include <net/if_types.h>
 341 #include <net/if_var.h>
 342 #include <net/ethernet.h>
 343 #include <netinet/in.h>
 344 #include <vfs/nfs/rpcv2.h>
 345 #include <vfs/nfs/nfsproto.h>
 346 #include <vfs/nfs/nfs.h>
 347 #include <vfs/nfs/nfsdiskless.h>
 348
 349 extern struct nfs_diskless      nfs_diskless;
 350
 351 /*
 352  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 353  * exist the sockaddr will remain zerod out (callers typically just check
 354  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 355  */
 356 static int
 357 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 358 {
 359         u_int32_t       a[4];
 360         char            *cp;
 361
 362         bzero(sa, sizeof(*sa));
 363
 364         if ((cp = kgetenv(ev)) == NULL)
 365                 return(1);
 366         if (sscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 367                 return(1);
 368         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 369                 return(1);
 370         /* XXX is this ordering correct? */
 371         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 372         sa->sin_len = sizeof(*sa);
 373         sa->sin_family = AF_INET;
 374         return(0);
 375 }
 376
 377 static int
 378 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 379 {
 380         char            *cp;
 381         u_int32_t       a[6];
 382
 383         bzero(sa, sizeof(*sa));
 384         sa->sdl_len = sizeof(*sa);
 385         sa->sdl_family = AF_LINK;
 386         sa->sdl_type = IFT_ETHER;
 387         sa->sdl_alen = ETHER_ADDR_LEN;
 388         if ((cp = kgetenv(ev)) == NULL)
 389                 return(1);
 390         if (sscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 391                 return(1);
 392         sa->sdl_data[0] = a[0];
 393         sa->sdl_data[1] = a[1];
 394         sa->sdl_data[2] = a[2];
 395         sa->sdl_data[3] = a[3];
 396         sa->sdl_data[4] = a[4];
 397         sa->sdl_data[5] = a[5];
 398         return(0);
 399 }
 400
 401 static int
 402 decode_nfshandle(char *ev, u_char *fh)
 403 {
 404         u_char  *cp;
 405         int     len, val;
 406
 407         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 408                 return(0);
 409         len = 0;
 410         cp++;
 411         for (;;) {
 412                 if (*cp == 'X')
 413                         return(len);
 414                 if ((sscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 415                         return(0);
 416                 *(fh++) = val;
 417                 len++;
 418                 cp += 2;
 419                 if (len > NFSX_V2FH)
 420                     return(0);
 421         }
 422 }
 423
 424 /*
 425  * Populate the essential fields in the nfsv3_diskless structure.
 426  *
 427  * The loader is expected to export the following environment variables:
 428  *
 429  * boot.netif.ip                IP address on boot interface
 430  * boot.netif.netmask           netmask on boot interface
 431  * boot.netif.gateway           default gateway (optional)
 432  * boot.netif.hwaddr            hardware address of boot interface
 433  * boot.nfsroot.server          IP address of root filesystem server
 434  * boot.nfsroot.path            path of the root filesystem on server
 435  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 436  */
 437 static void
 438 pxe_setup_nfsdiskless(void)
 439 {
 440         struct nfs_diskless     *nd = &nfs_diskless;
 441         struct ifnet            *ifp;
 442         struct ifaddr           *ifa;
 443         struct sockaddr_dl      *sdl, ourdl;
 444         struct sockaddr_in      myaddr, netmask;
 445         char                    *cp;
 446
 447         /* set up interface */
 448         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 449                 return;
 450         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 451                 printf("PXE: no netmask\n");
 452                 return;
 453         }
 454         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 455         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 456         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 457                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 458         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 459
 460         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 461                 printf("PXE: no hardware address\n");
 462                 return;
 463         }
 464         ifa = NULL;
 465         ifp = TAILQ_FIRST(&ifnet);
 466         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 467                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 468                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 469                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 470                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 471                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 472                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 473                                           ourdl.sdl_data + ourdl.sdl_nlen,
 474                                           sdl->sdl_alen))
 475                                     goto match_done;
 476                         }
 477                 }
 478         }
 479         printf("PXE: no interface\n");
 480         return; /* no matching interface */
 481 match_done:
 482         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 483
 484         /* set up gateway */
 485         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 486
 487         /* XXX set up swap? */
 488
 489         /* set up root mount */
 490         nd->root_args.rsize = 8192;             /* XXX tunable? */
 491         nd->root_args.wsize = 8192;
 492         nd->root_args.sotype = SOCK_DGRAM;
 493         nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
 494         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 495                 printf("PXE: no server\n");
 496                 return;
 497         }
 498         nd->root_saddr.sin_port = htons(NFS_PORT);
 499
 500         /*
 501          * A tftp-only loader may pass NFS path information without a
 502          * root handle.  Generate a warning but continue configuring.
 503          */
 504         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 505                 printf("PXE: Warning, no NFS handle passed from loader\n");
 506         }
 507         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 508                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 509
 510         nfs_diskless_valid = 1;
 511 }
 512
 513 #endif
 514 #endif