sys/platform/vkernel/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/vkernel/i386/autoconf.c,v 1.11 2007/06/07 23:14:28 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/buf.h>
  64 #include <sys/conf.h>
  65 #include <sys/disklabel.h>
  66 #include <sys/diskslice.h>
  67 #include <sys/reboot.h>
  68 #include <sys/kernel.h>
  69 #include <sys/malloc.h>
  70 #include <sys/mount.h>
  71 #include <sys/cons.h>
  72 #include <sys/thread.h>
  73 #include <sys/device.h>
  74 #include <sys/machintr.h>
  75
  76 #include <vm/pmap.h>
  77 #include <vm/vm_kern.h>
  78 #include <vm/vm_extern.h>
  79 #include <vm/vm_pager.h>
  80
  81 #if 0
  82 #include <machine/pcb.h>
  83 #include <machine/pcb_ext.h>
  84 #include <machine/vm86.h>
  85 #endif
  86 #include <machine/globaldata.h>
  87 #include <machine/md_var.h>
  88
  89 #if NISA > 0
  90 #include <bus/isa/isavar.h>
  91
  92 device_t isa_bus_device = 0;
  93 #endif
  94
  95 static void cpu_startup (void *);
  96 static void configure_first (void *);
  97 static void configure (void *);
  98 static void configure_final (void *);
  99
 100 #if defined(FFS) && defined(FFS_ROOT)
 101 static void     setroot (void);
 102 #endif
 103
 104 #if defined(NFS) && defined(NFS_ROOT)
 105 #if !defined(BOOTP_NFSROOT)
 106 static void     pxe_setup_nfsdiskless(void);
 107 #endif
 108 #endif
 109
 110 SYSINIT(cpu, SI_BOOT2_SMP, SI_ORDER_FIRST, cpu_startup, NULL);
 111 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 112 /* SI_ORDER_SECOND is hookable */
 113 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 114 /* SI_ORDER_MIDDLE is hookable */
 115 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 116
 117 cdev_t  rootdev = NULL;
 118 cdev_t  dumpdev = NULL;
 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         vm_offset_t minaddr;
 131         vm_offset_t maxaddr;
 132
 133         kprintf("%s", version);
 134         kprintf("real memory = %llu (%lluK bytes)\n",
 135                 ptoa(Maxmem), ptoa(Maxmem) / 1024);
 136
 137         if (nbuf == 0) {
 138                 int factor = 4 * BKVASIZE / 1024;
 139                 int kbytes = Maxmem * (PAGE_SIZE / 1024);
 140
 141                 nbuf = 50;
 142                 if (kbytes > 4096)
 143                         nbuf += min((kbytes - 4096) / factor, 65536 / factor);
 144                 if (kbytes > 65536)
 145                         nbuf += (kbytes - 65536) * 2 / (factor * 5);
 146                 if (maxbcache && nbuf > maxbcache / BKVASIZE)
 147                         nbuf = maxbcache / BKVASIZE;
 148         }
 149         if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
 150                 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
 151                 kprintf("Warning: nbufs capped at %d\n", nbuf);
 152         }
 153
 154         nswbuf = max(min(nbuf/4, 256), 16);
 155 #ifdef NSWBUF_MIN
 156         if (nswbuf < NSWBUF_MIN)
 157                 nswbuf = NSWBUF_MIN;
 158 #endif
 159
 160         /*
 161          * Allocate memory for the buffer cache
 162          */
 163         buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
 164         swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
 165
 166
 167 #ifdef DIRECTIO
 168         ffs_rawread_setup();
 169 #endif
 170         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 171                       (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
 172         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 173                       (nbuf*BKVASIZE));
 174         buffer_map.system_map = 1;
 175         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 176                       (nswbuf*MAXPHYS) + pager_map_size);
 177         pager_map.system_map = 1;
 178 #if defined(USERCONFIG)
 179         userconfig();
 180         cninit();               /* the preferred console may have changed */
 181 #endif
 182         kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats.v_free_count),
 183                 ptoa(vmstats.v_free_count) / 1024);
 184         bufinit();
 185         vm_pager_bufferinit();
 186 #ifdef SMP
 187         mp_start();
 188         mp_announce();
 189 #endif
 190         cpu_setregs();
 191 }
 192
 193 /*
 194  * Determine i/o configuration for a machine.
 195  */
 196 static void
 197 configure_first(void *dummy)
 198 {
 199 }
 200
 201 static void
 202 configure(void *dummy)
 203 {
 204         /*
 205          * Final interrupt support acviation, then enable hardware interrupts.
 206          */
 207         MachIntrABI.finalize();
 208         cpu_enable_intr();
 209
 210         /*
 211          * This will configure all devices, generally starting with the
 212          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 213          * dummies up the attach in order to delay legacy initialization
 214          * until after all other busses/subsystems have had a chance
 215          * at those resources.
 216          */
 217         root_bus_configure();
 218
 219 #if NISA > 0
 220         /*
 221          * Explicitly probe and attach ISA last.  The isa bus saves
 222          * it's device node at attach time for us here.
 223          */
 224         if (isa_bus_device)
 225                 isa_probe_children(isa_bus_device);
 226 #endif
 227
 228         /*
 229          * Allow lowering of the ipl to the lowest kernel level if we
 230          * panic (or call tsleep() before clearing `cold').  No level is
 231          * completely safe (since a panic may occur in a critical region
 232          * at splhigh()), but we want at least bio interrupts to work.
 233          */
 234         safepri = TDPRI_KERN_USER;
 235 }
 236
 237 static void
 238 configure_final(void *dummy)
 239 {
 240         cninit_finish();
 241
 242         if (bootverbose)
 243                 kprintf("Device configuration finished.\n");
 244 }
 245
 246 #ifdef BOOTP
 247 void bootpc_init(void);
 248 #endif
 249 /*
 250  * Do legacy root filesystem discovery.
 251  */
 252 void
 253 cpu_rootconf(void)
 254 {
 255 #ifdef BOOTP
 256         bootpc_init();
 257 #endif
 258 #if defined(NFS) && defined(NFS_ROOT)
 259 #if !defined(BOOTP_NFSROOT)
 260         pxe_setup_nfsdiskless();
 261         if (nfs_diskless_valid)
 262 #endif
 263                 rootdevnames[0] = "nfs:";
 264 #endif
 265 #if defined(FFS) && defined(FFS_ROOT)
 266         if (!rootdevnames[0])
 267                 setroot();
 268 #endif
 269 }
 270 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 271
 272 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 273
 274 #if defined(FFS) && defined(FFS_ROOT)
 275
 276 /*
 277  * The boot code uses old block device major numbers to pass bootdev to
 278  * us.  We have to translate these to character device majors because
 279  * we don't have block devices any more.
 280  */
 281 static int
 282 boot_translate_majdev(int bmajor)
 283 {
 284         static int conv[] = { BOOTMAJOR_CONVARY };
 285
 286         if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
 287                 return(conv[bmajor]);
 288         return(-1);
 289 }
 290
 291 /*
 292  * Attempt to find the device from which we were booted.
 293  * If we can do so, and not instructed not to do so,
 294  * set rootdevs[] and rootdevnames[] to correspond to the
 295  * boot device(s).
 296  *
 297  * This code survives in order to allow the system to be
 298  * booted from legacy environments that do not correctly
 299  * populate the kernel environment. There are significant
 300  * restrictions on the bootability of the system in this
 301  * situation; it can only be mounting root from a 'da'
 302  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 303  */
 304 static void
 305 setroot(void)
 306 {
 307         int majdev, mindev, unit, slice, part;
 308         cdev_t newrootdev, dev;
 309         char partname[2];
 310         char *sname;
 311
 312         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 313                 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 314                 return;
 315         }
 316         majdev = boot_translate_majdev(B_TYPE(bootdev));
 317         if (bootverbose) {
 318                 kprintf("bootdev: %08lx type=%ld unit=%ld "
 319                         "slice=%ld part=%ld major=%d\n",
 320                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 321                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 322         }
 323         dev = udev2dev(makeudev(majdev, 0), 0);
 324         if (!dev_is_good(dev))
 325                 return;
 326         unit = B_UNIT(bootdev);
 327         slice = B_SLICE(bootdev);
 328         if (slice == WHOLE_DISK_SLICE)
 329                 slice = COMPATIBILITY_SLICE;
 330         if (slice < 0 || slice >= MAX_SLICES) {
 331                 kprintf("bad slice\n");
 332                 return;
 333         }
 334
 335         part = B_PARTITION(bootdev);
 336         mindev = dkmakeminor(unit, slice, part);
 337         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 338         if (!dev_is_good(newrootdev))
 339                 return;
 340         sname = dsname(newrootdev, unit, slice, part, partname);
 341         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 342         ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 343
 344         /*
 345          * For properly dangerously dedicated disks (ones with a historical
 346          * bogus partition table), the boot blocks will give slice = 4, but
 347          * the kernel will only provide the compatibility slice since it
 348          * knows that slice 4 is not a real slice.  Arrange to try mounting
 349          * the compatibility slice as root if mounting the slice passed by
 350          * the boot blocks fails.  This handles the dangerously dedicated
 351          * case and perhaps others.
 352          */
 353         if (slice == COMPATIBILITY_SLICE)
 354                 return;
 355         slice = COMPATIBILITY_SLICE;
 356         sname = dsname(newrootdev, unit, slice, part, partname);
 357         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 358         ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 359 }
 360 #endif
 361
 362 #if defined(NFS) && defined(NFS_ROOT)
 363 #if !defined(BOOTP_NFSROOT)
 364
 365 #include <sys/socket.h>
 366 #include <net/if.h>
 367 #include <net/if_dl.h>
 368 #include <net/if_types.h>
 369 #include <net/if_var.h>
 370 #include <net/ethernet.h>
 371 #include <netinet/in.h>
 372 #include <vfs/nfs/rpcv2.h>
 373 #include <vfs/nfs/nfsproto.h>
 374 #include <vfs/nfs/nfs.h>
 375 #include <vfs/nfs/nfsdiskless.h>
 376
 377 extern struct nfs_diskless      nfs_diskless;
 378
 379 /*
 380  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 381  * exist the sockaddr will remain zerod out (callers typically just check
 382  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 383  */
 384 static int
 385 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 386 {
 387         u_int32_t       a[4];
 388         char            *cp;
 389
 390         bzero(sa, sizeof(*sa));
 391
 392         if ((cp = kgetenv(ev)) == NULL)
 393                 return(1);
 394         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 395                 return(1);
 396         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 397                 return(1);
 398         /* XXX is this ordering correct? */
 399         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 400         sa->sin_len = sizeof(*sa);
 401         sa->sin_family = AF_INET;
 402         return(0);
 403 }
 404
 405 static int
 406 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 407 {
 408         char            *cp;
 409         u_int32_t       a[6];
 410
 411         bzero(sa, sizeof(*sa));
 412         sa->sdl_len = sizeof(*sa);
 413         sa->sdl_family = AF_LINK;
 414         sa->sdl_type = IFT_ETHER;
 415         sa->sdl_alen = ETHER_ADDR_LEN;
 416         if ((cp = kgetenv(ev)) == NULL)
 417                 return(1);
 418         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 419                 return(1);
 420         sa->sdl_data[0] = a[0];
 421         sa->sdl_data[1] = a[1];
 422         sa->sdl_data[2] = a[2];
 423         sa->sdl_data[3] = a[3];
 424         sa->sdl_data[4] = a[4];
 425         sa->sdl_data[5] = a[5];
 426         return(0);
 427 }
 428
 429 static int
 430 decode_nfshandle(char *ev, u_char *fh)
 431 {
 432         u_char  *cp;
 433         int     len, val;
 434
 435         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 436                 return(0);
 437         len = 0;
 438         cp++;
 439         for (;;) {
 440                 if (*cp == 'X')
 441                         return(len);
 442                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 443                         return(0);
 444                 *(fh++) = val;
 445                 len++;
 446                 cp += 2;
 447                 if (len > NFSX_V2FH)
 448                     return(0);
 449         }
 450 }
 451
 452 /*
 453  * Populate the essential fields in the nfsv3_diskless structure.
 454  *
 455  * The loader is expected to export the following environment variables:
 456  *
 457  * boot.netif.ip                IP address on boot interface
 458  * boot.netif.netmask           netmask on boot interface
 459  * boot.netif.gateway           default gateway (optional)
 460  * boot.netif.hwaddr            hardware address of boot interface
 461  * boot.nfsroot.server          IP address of root filesystem server
 462  * boot.nfsroot.path            path of the root filesystem on server
 463  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 464  */
 465 static void
 466 pxe_setup_nfsdiskless(void)
 467 {
 468         struct nfs_diskless     *nd = &nfs_diskless;
 469         struct ifnet            *ifp;
 470         struct ifaddr           *ifa;
 471         struct sockaddr_dl      *sdl, ourdl;
 472         struct sockaddr_in      myaddr, netmask;
 473         char                    *cp;
 474
 475         /* set up interface */
 476         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 477                 return;
 478         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 479                 kprintf("PXE: no netmask\n");
 480                 return;
 481         }
 482         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 483         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 484         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 485                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 486         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 487
 488         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 489                 kprintf("PXE: no hardware address\n");
 490                 return;
 491         }
 492         ifa = NULL;
 493         ifp = TAILQ_FIRST(&ifnet);
 494         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 495                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 496                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 497                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 498                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 499                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 500                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 501                                           ourdl.sdl_data + ourdl.sdl_nlen,
 502                                           sdl->sdl_alen))
 503                                     goto match_done;
 504                         }
 505                 }
 506         }
 507         kprintf("PXE: no interface\n");
 508         return; /* no matching interface */
 509 match_done:
 510         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 511
 512         /* set up gateway */
 513         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 514
 515         /* XXX set up swap? */
 516
 517         /* set up root mount */
 518         nd->root_args.rsize = 8192;             /* XXX tunable? */
 519         nd->root_args.wsize = 8192;
 520         nd->root_args.sotype = SOCK_DGRAM;
 521         nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
 522         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 523                 kprintf("PXE: no server\n");
 524                 return;
 525         }
 526         nd->root_saddr.sin_port = htons(NFS_PORT);
 527
 528         /*
 529          * A tftp-only loader may pass NFS path information without a
 530          * root handle.  Generate a warning but continue configuring.
 531          */
 532         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 533                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 534         }
 535         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 536                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 537
 538         nfs_diskless_valid = 1;
 539 }
 540
 541 #endif
 542 #endif