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  */
  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_ffs.h"
  50 #include "opt_cd9660.h"
  51 #include "opt_nfs.h"
  52 #include "opt_nfsroot.h"
  53 #include "opt_rootdevname.h"
  54
  55 #include "use_isa.h"
  56
  57 #include <sys/param.h>
  58 #include <sys/systm.h>
  59 #include <sys/bootmaj.h>
  60 #include <sys/bus.h>
  61 #include <sys/buf.h>
  62 #include <sys/conf.h>
  63 #include <sys/diskslice.h>
  64 #include <sys/reboot.h>
  65 #include <sys/kernel.h>
  66 #include <sys/malloc.h>
  67 #include <sys/mount.h>
  68 #include <sys/cons.h>
  69 #include <sys/thread.h>
  70 #include <sys/device.h>
  71 #include <sys/machintr.h>
  72
  73 #include <vm/pmap.h>
  74 #include <vm/vm_kern.h>
  75 #include <vm/vm_extern.h>
  76 #include <vm/vm_pager.h>
  77
  78 #if 0
  79 #include <machine/pcb.h>
  80 #include <machine/pcb_ext.h>
  81 #include <machine/vm86.h>
  82 #endif
  83 #include <machine/smp.h>
  84 #include <machine/globaldata.h>
  85 #include <machine/md_var.h>
  86
  87 #if NISA > 0
  88 #include <bus/isa/isavar.h>
  89
  90 device_t isa_bus_device = NULL;
  91 #endif
  92
  93 static void cpu_startup (void *);
  94 static void configure_first (void *);
  95 static void configure (void *);
  96 static void configure_final (void *);
  97
  98 #if defined(FFS) && defined(FFS_ROOT)
  99 static void     setroot (void);
 100 #endif
 101
 102 #if defined(NFS) && defined(NFS_ROOT)
 103 #if !defined(BOOTP_NFSROOT)
 104 static void     pxe_setup_nfsdiskless(void);
 105 #endif
 106 #endif
 107
 108 SYSINIT(cpu, SI_BOOT2_START_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
 109 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 110 /* SI_ORDER_SECOND is hookable */
 111 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 112 /* SI_ORDER_MIDDLE is hookable */
 113 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 114
 115 cdev_t  rootdev = NULL;
 116 cdev_t  dumpdev = NULL;
 117
 118 /*
 119  *
 120  */
 121 static void
 122 cpu_startup(void *dummy)
 123 {
 124         vm_offset_t buffer_sva;
 125         vm_offset_t buffer_eva;
 126         vm_offset_t pager_sva;
 127         vm_offset_t pager_eva;
 128
 129         kprintf("%s", version);
 130         kprintf("real memory = %ju (%ju MB)\n",
 131                 (uintmax_t)ptoa(Maxmem),
 132                 (uintmax_t)ptoa(Maxmem) / 1024 / 1024);
 133
 134         if (nbuf == 0) {
 135                 int factor = 4 * BKVASIZE / 1024;
 136                 int kbytes = Maxmem * (PAGE_SIZE / 1024);
 137
 138                 nbuf = 50;
 139                 if (kbytes > 4096)
 140                         nbuf += min((kbytes - 4096) / factor, 65536 / factor);
 141                 if (kbytes > 65536)
 142                         nbuf += (kbytes - 65536) * 2 / (factor * 5);
 143                 if (maxbcache && nbuf > maxbcache / BKVASIZE)
 144                         nbuf = maxbcache / BKVASIZE;
 145         }
 146         if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
 147                 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
 148                 kprintf("Warning: nbufs capped at %ld\n", nbuf);
 149         }
 150
 151         nswbuf = lmax(lmin(nbuf / 4, 256), 16);
 152 #ifdef NSWBUF_MIN
 153         if (nswbuf < NSWBUF_MIN)
 154                 nswbuf = NSWBUF_MIN;
 155 #endif
 156
 157         /*
 158          * Allocate memory for the buffer cache
 159          */
 160         buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
 161         swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
 162
 163
 164 #ifdef DIRECTIO
 165         ffs_rawread_setup();
 166 #endif
 167         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 168                       (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
 169         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 170                       (nbuf*BKVASIZE));
 171         buffer_map.system_map = 1;
 172         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 173                       (nswbuf*MAXPHYS) + pager_map_size);
 174         pager_map.system_map = 1;
 175 #if defined(USERCONFIG)
 176         userconfig();
 177         cninit();               /* the preferred console may have changed */
 178 #endif
 179         kprintf("avail memory = %ju (%ju MB)\n",
 180                 (uintmax_t)ptoa(vmstats.v_free_count),
 181                 (uintmax_t)ptoa(vmstats.v_free_count) / 1024 / 1024);
 182         mp_start();
 183         mp_announce();
 184         cpu_setregs();
 185 }
 186
 187 /*
 188  * Determine i/o configuration for a machine.
 189  */
 190 static void
 191 configure_first(void *dummy)
 192 {
 193 }
 194
 195 static void
 196 configure(void *dummy)
 197 {
 198         /*
 199          * Final interrupt support acviation, then enable hardware interrupts.
 200          */
 201         MachIntrABI.finalize();
 202         cpu_enable_intr();
 203
 204         /*
 205          * This will configure all devices, generally starting with the
 206          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 207          * dummies up the attach in order to delay legacy initialization
 208          * until after all other busses/subsystems have had a chance
 209          * at those resources.
 210          */
 211         root_bus_configure();
 212
 213 #if NISA > 0
 214         /*
 215          * Explicitly probe and attach ISA last.  The isa bus saves
 216          * it's device node at attach time for us here.
 217          */
 218         if (isa_bus_device)
 219                 isa_probe_children(isa_bus_device);
 220 #endif
 221
 222         /*
 223          * Allow lowering of the ipl to the lowest kernel level if we
 224          * panic (or call tsleep() before clearing `cold').  No level is
 225          * completely safe (since a panic may occur in a critical region
 226          * at splhigh()), but we want at least bio interrupts to work.
 227          */
 228         safepri = TDPRI_KERN_USER;
 229 }
 230
 231 static void
 232 configure_final(void *dummy)
 233 {
 234         cninit_finish();
 235
 236         if (bootverbose)
 237                 kprintf("Device configuration finished.\n");
 238 }
 239
 240 #ifdef BOOTP
 241 void bootpc_init(void);
 242 #endif
 243 /*
 244  * Do legacy root filesystem discovery.
 245  */
 246 void
 247 cpu_rootconf(void)
 248 {
 249 #ifdef BOOTP
 250         bootpc_init();
 251 #endif
 252 #if defined(NFS) && defined(NFS_ROOT)
 253 #if !defined(BOOTP_NFSROOT)
 254         pxe_setup_nfsdiskless();
 255         if (nfs_diskless_valid)
 256 #endif
 257                 rootdevnames[0] = "nfs:";
 258 #endif
 259 #if defined(FFS) && defined(FFS_ROOT)
 260         if (!rootdevnames[0])
 261                 setroot();
 262 #endif
 263 }
 264 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 265
 266 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 267
 268 #if defined(FFS) && defined(FFS_ROOT)
 269
 270 /*
 271  * The boot code uses old block device major numbers to pass bootdev to
 272  * us.  We have to translate these to character device majors because
 273  * we don't have block devices any more.
 274  */
 275 static int
 276 boot_translate_majdev(int bmajor)
 277 {
 278         static int conv[] = { BOOTMAJOR_CONVARY };
 279
 280         if (bmajor >= 0 && bmajor < NELEM(conv))
 281                 return(conv[bmajor]);
 282         return(-1);
 283 }
 284
 285 /*
 286  * Attempt to find the device from which we were booted.
 287  * If we can do so, and not instructed not to do so,
 288  * set rootdevs[] and rootdevnames[] to correspond to the
 289  * boot device(s).
 290  *
 291  * This code survives in order to allow the system to be
 292  * booted from legacy environments that do not correctly
 293  * populate the kernel environment. There are significant
 294  * restrictions on the bootability of the system in this
 295  * situation; it can only be mounting root from a 'da'
 296  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 297  */
 298 static void
 299 setroot(void)
 300 {
 301         int majdev, mindev, unit, slice, part;
 302         cdev_t newrootdev, dev;
 303         char partname[2];
 304         char *sname;
 305
 306         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 307                 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 308                 return;
 309         }
 310         majdev = boot_translate_majdev(B_TYPE(bootdev));
 311         if (bootverbose) {
 312                 kprintf("bootdev: %08lx type=%ld unit=%ld "
 313                         "slice=%ld part=%ld major=%d\n",
 314                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 315                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 316         }
 317         dev = udev2dev(makeudev(majdev, 0), 0);
 318         if (!dev_is_good(dev))
 319                 return;
 320         unit = B_UNIT(bootdev);
 321         slice = B_SLICE(bootdev);
 322         if (slice == WHOLE_DISK_SLICE)
 323                 slice = COMPATIBILITY_SLICE;
 324         if (slice < 0 || slice >= MAX_SLICES) {
 325                 kprintf("bad slice\n");
 326                 return;
 327         }
 328
 329         part = B_PARTITION(bootdev);
 330         mindev = dkmakeminor(unit, slice, part);
 331         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 332         if (!dev_is_good(newrootdev))
 333                 return;
 334         sname = dsname(newrootdev, unit, slice, part, partname);
 335         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 336         ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 337
 338         /*
 339          * For properly dangerously dedicated disks (ones with a historical
 340          * bogus partition table), the boot blocks will give slice = 4, but
 341          * the kernel will only provide the compatibility slice since it
 342          * knows that slice 4 is not a real slice.  Arrange to try mounting
 343          * the compatibility slice as root if mounting the slice passed by
 344          * the boot blocks fails.  This handles the dangerously dedicated
 345          * case and perhaps others.
 346          */
 347         if (slice == COMPATIBILITY_SLICE)
 348                 return;
 349         slice = COMPATIBILITY_SLICE;
 350         sname = dsname(newrootdev, unit, slice, part, partname);
 351         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 352         ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 353 }
 354 #endif
 355
 356 #if defined(NFS) && defined(NFS_ROOT)
 357 #if !defined(BOOTP_NFSROOT)
 358
 359 #include <sys/socket.h>
 360 #include <net/if.h>
 361 #include <net/if_dl.h>
 362 #include <net/if_types.h>
 363 #include <net/if_var.h>
 364 #include <net/ethernet.h>
 365 #include <netinet/in.h>
 366 #include <vfs/nfs/rpcv2.h>
 367 #include <vfs/nfs/nfsproto.h>
 368 #include <vfs/nfs/nfs.h>
 369 #include <vfs/nfs/nfsdiskless.h>
 370
 371 extern struct nfs_diskless      nfs_diskless;
 372
 373 /*
 374  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 375  * exist the sockaddr will remain zerod out (callers typically just check
 376  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 377  */
 378 static int
 379 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 380 {
 381         u_int32_t       a[4];
 382         char            *cp;
 383
 384         bzero(sa, sizeof(*sa));
 385
 386         if ((cp = kgetenv(ev)) == NULL)
 387                 return(1);
 388         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 389                 return(1);
 390         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 391                 return(1);
 392         /* XXX is this ordering correct? */
 393         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 394         sa->sin_len = sizeof(*sa);
 395         sa->sin_family = AF_INET;
 396         return(0);
 397 }
 398
 399 static int
 400 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 401 {
 402         char            *cp;
 403         u_int32_t       a[6];
 404
 405         bzero(sa, sizeof(*sa));
 406         sa->sdl_len = sizeof(*sa);
 407         sa->sdl_family = AF_LINK;
 408         sa->sdl_type = IFT_ETHER;
 409         sa->sdl_alen = ETHER_ADDR_LEN;
 410         if ((cp = kgetenv(ev)) == NULL)
 411                 return(1);
 412         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 413                 return(1);
 414         sa->sdl_data[0] = a[0];
 415         sa->sdl_data[1] = a[1];
 416         sa->sdl_data[2] = a[2];
 417         sa->sdl_data[3] = a[3];
 418         sa->sdl_data[4] = a[4];
 419         sa->sdl_data[5] = a[5];
 420         return(0);
 421 }
 422
 423 static int
 424 decode_nfshandle(char *ev, u_char *fh)
 425 {
 426         u_char  *cp;
 427         int     len, val;
 428
 429         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 430                 return(0);
 431         len = 0;
 432         cp++;
 433         for (;;) {
 434                 if (*cp == 'X')
 435                         return(len);
 436                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 437                         return(0);
 438                 *(fh++) = val;
 439                 len++;
 440                 cp += 2;
 441                 if (len > NFSX_V2FH)
 442                     return(0);
 443         }
 444 }
 445
 446 /*
 447  * Populate the essential fields in the nfsv3_diskless structure.
 448  *
 449  * The loader is expected to export the following environment variables:
 450  *
 451  * boot.netif.ip                IP address on boot interface
 452  * boot.netif.netmask           netmask on boot interface
 453  * boot.netif.gateway           default gateway (optional)
 454  * boot.netif.hwaddr            hardware address of boot interface
 455  * boot.netif.name              name of boot interface (instead of hw addr)
 456  * boot.nfsroot.server          IP address of root filesystem server
 457  * boot.nfsroot.path            path of the root filesystem on server
 458  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 459  */
 460 static void
 461 pxe_setup_nfsdiskless(void)
 462 {
 463         struct nfs_diskless     *nd = &nfs_diskless;
 464         struct ifnet            *ifp;
 465         struct ifaddr           *ifa;
 466         struct sockaddr_dl      *sdl, ourdl;
 467         struct sockaddr_in      myaddr, netmask;
 468         char                    *cp;
 469
 470         /* set up interface */
 471         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 472                 return;
 473         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 474                 kprintf("PXE: no netmask\n");
 475                 return;
 476         }
 477         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 478         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 479         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 480                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 481         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 482
 483         if ((cp = kgetenv("boot.netif.name")) != NULL) {
 484                 ifnet_lock();
 485                 ifp = ifunit(cp);
 486                 if (ifp) {
 487                         strlcpy(nd->myif.ifra_name, ifp->if_xname,
 488                             sizeof(nd->myif.ifra_name));
 489                         ifnet_unlock();
 490                         goto match_done;
 491                 }
 492                 ifnet_unlock();
 493                 kprintf("PXE: cannot find interface %s\n", cp);
 494                 return;
 495         }
 496
 497         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 498                 kprintf("PXE: no hardware address\n");
 499                 return;
 500         }
 501         ifa = NULL;
 502         ifnet_lock();
 503         TAILQ_FOREACH(ifp, &ifnetlist, if_link) {
 504                 struct ifaddr_container *ifac;
 505
 506                 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
 507                         ifa = ifac->ifa;
 508
 509                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 510                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 511                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 512                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 513                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 514                                           ourdl.sdl_data + ourdl.sdl_nlen,
 515                                           sdl->sdl_alen)) {
 516                                         strlcpy(nd->myif.ifra_name,
 517                                             ifp->if_xname,
 518                                             sizeof(nd->myif.ifra_name));
 519                                         ifnet_unlock();
 520                                         goto match_done;
 521                                 }
 522                         }
 523                 }
 524         }
 525         ifnet_unlock();
 526         kprintf("PXE: no interface\n");
 527         return; /* no matching interface */
 528 match_done:
 529         /* set up gateway */
 530         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 531
 532         /* XXX set up swap? */
 533
 534         /* set up root mount */
 535         nd->root_args.rsize = 8192;             /* XXX tunable? */
 536         nd->root_args.wsize = 8192;
 537         nd->root_args.sotype = SOCK_STREAM;
 538         nd->root_args.flags = NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT;
 539         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 540                 kprintf("PXE: no server\n");
 541                 return;
 542         }
 543         nd->root_saddr.sin_port = htons(NFS_PORT);
 544
 545         /*
 546          * A tftp-only loader may pass NFS path information without a
 547          * root handle.  Generate a warning but continue configuring.
 548          */
 549         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 550                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 551         }
 552         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 553                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 554
 555         nfs_diskless_valid = 1;
 556 }
 557
 558 #endif
 559 #endif