sys/platform/pc64/amd64/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/pc64/amd64/autoconf.c,v 1.1 2007/09/23 04:29:31 yanyh 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/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 <vm/pmap.h>
  76 #include <vm/vm_kern.h>
  77 #include <vm/vm_extern.h>
  78 #include <vm/vm_pager.h>
  79
  80 #if 0
  81 #include <machine/pcb.h>
  82 #include <machine/pcb_ext.h>
  83 #include <machine/vm86.h>
  84 #endif
  85 #include <machine/smp.h>
  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
 131         kprintf("%s", version);
 132         kprintf("real memory = %llu (%lluK bytes)\n",
 133                 ptoa(Maxmem), ptoa(Maxmem) / 1024);
 134
 135         if (nbuf == 0) {
 136                 int factor = 4 * BKVASIZE / 1024;
 137                 int kbytes = Maxmem * (PAGE_SIZE / 1024);
 138
 139                 nbuf = 50;
 140                 if (kbytes > 4096)
 141                         nbuf += min((kbytes - 4096) / factor, 65536 / factor);
 142                 if (kbytes > 65536)
 143                         nbuf += (kbytes - 65536) * 2 / (factor * 5);
 144                 if (maxbcache && nbuf > maxbcache / BKVASIZE)
 145                         nbuf = maxbcache / BKVASIZE;
 146         }
 147         if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
 148                 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
 149                 kprintf("Warning: nbufs capped at %d\n", nbuf);
 150         }
 151
 152         nswbuf = max(min(nbuf/4, 256), 16);
 153 #ifdef NSWBUF_MIN
 154         if (nswbuf < NSWBUF_MIN)
 155                 nswbuf = NSWBUF_MIN;
 156 #endif
 157
 158         /*
 159          * Allocate memory for the buffer cache
 160          */
 161         buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
 162         swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
 163
 164
 165 #ifdef DIRECTIO
 166         ffs_rawread_setup();
 167 #endif
 168         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 169                       (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
 170         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 171                       (nbuf*BKVASIZE));
 172         buffer_map.system_map = 1;
 173         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 174                       (nswbuf*MAXPHYS) + pager_map_size);
 175         pager_map.system_map = 1;
 176 #if defined(USERCONFIG)
 177         userconfig();
 178         cninit();               /* the preferred console may have changed */
 179 #endif
 180         kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats.v_free_count),
 181                 ptoa(vmstats.v_free_count) / 1024);
 182         bufinit();
 183         vm_pager_bufferinit();
 184 #ifdef SMP
 185         mp_start();
 186         mp_announce();
 187 #endif
 188         cpu_setregs();
 189 }
 190
 191 /*
 192  * Determine i/o configuration for a machine.
 193  */
 194 static void
 195 configure_first(void *dummy)
 196 {
 197 }
 198
 199 static void
 200 configure(void *dummy)
 201 {
 202         /*
 203          * Final interrupt support acviation, then enable hardware interrupts.
 204          */
 205         MachIntrABI.finalize();
 206         cpu_enable_intr();
 207
 208         /*
 209          * This will configure all devices, generally starting with the
 210          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 211          * dummies up the attach in order to delay legacy initialization
 212          * until after all other busses/subsystems have had a chance
 213          * at those resources.
 214          */
 215         root_bus_configure();
 216
 217 #if NISA > 0
 218         /*
 219          * Explicitly probe and attach ISA last.  The isa bus saves
 220          * it's device node at attach time for us here.
 221          */
 222         if (isa_bus_device)
 223                 isa_probe_children(isa_bus_device);
 224 #endif
 225
 226         /*
 227          * Allow lowering of the ipl to the lowest kernel level if we
 228          * panic (or call tsleep() before clearing `cold').  No level is
 229          * completely safe (since a panic may occur in a critical region
 230          * at splhigh()), but we want at least bio interrupts to work.
 231          */
 232         safepri = TDPRI_KERN_USER;
 233 }
 234
 235 static void
 236 configure_final(void *dummy)
 237 {
 238         cninit_finish();
 239
 240         if (bootverbose)
 241                 kprintf("Device configuration finished.\n");
 242 }
 243
 244 #ifdef BOOTP
 245 void bootpc_init(void);
 246 #endif
 247 /*
 248  * Do legacy root filesystem discovery.
 249  */
 250 void
 251 cpu_rootconf(void)
 252 {
 253 #ifdef BOOTP
 254         bootpc_init();
 255 #endif
 256 #if defined(NFS) && defined(NFS_ROOT)
 257 #if !defined(BOOTP_NFSROOT)
 258         pxe_setup_nfsdiskless();
 259         if (nfs_diskless_valid)
 260 #endif
 261                 rootdevnames[0] = "nfs:";
 262 #endif
 263 #if defined(FFS) && defined(FFS_ROOT)
 264         if (!rootdevnames[0])
 265                 setroot();
 266 #endif
 267 }
 268 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 269
 270 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 271
 272 #if defined(FFS) && defined(FFS_ROOT)
 273
 274 /*
 275  * The boot code uses old block device major numbers to pass bootdev to
 276  * us.  We have to translate these to character device majors because
 277  * we don't have block devices any more.
 278  */
 279 static int
 280 boot_translate_majdev(int bmajor)
 281 {
 282         static int conv[] = { BOOTMAJOR_CONVARY };
 283
 284         if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
 285                 return(conv[bmajor]);
 286         return(-1);
 287 }
 288
 289 /*
 290  * Attempt to find the device from which we were booted.
 291  * If we can do so, and not instructed not to do so,
 292  * set rootdevs[] and rootdevnames[] to correspond to the
 293  * boot device(s).
 294  *
 295  * This code survives in order to allow the system to be
 296  * booted from legacy environments that do not correctly
 297  * populate the kernel environment. There are significant
 298  * restrictions on the bootability of the system in this
 299  * situation; it can only be mounting root from a 'da'
 300  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 301  */
 302 static void
 303 setroot(void)
 304 {
 305         int majdev, mindev, unit, slice, part;
 306         cdev_t newrootdev, dev;
 307         char partname[2];
 308         char *sname;
 309
 310         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 311                 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 312                 return;
 313         }
 314         majdev = boot_translate_majdev(B_TYPE(bootdev));
 315         if (bootverbose) {
 316                 kprintf("bootdev: %08lx type=%ld unit=%ld "
 317                         "slice=%ld part=%ld major=%d\n",
 318                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 319                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 320         }
 321         dev = udev2dev(makeudev(majdev, 0), 0);
 322         if (!dev_is_good(dev))
 323                 return;
 324         unit = B_UNIT(bootdev);
 325         slice = B_SLICE(bootdev);
 326         if (slice == WHOLE_DISK_SLICE)
 327                 slice = COMPATIBILITY_SLICE;
 328         if (slice < 0 || slice >= MAX_SLICES) {
 329                 kprintf("bad slice\n");
 330                 return;
 331         }
 332
 333         part = B_PARTITION(bootdev);
 334         mindev = dkmakeminor(unit, slice, part);
 335         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 336         if (!dev_is_good(newrootdev))
 337                 return;
 338         sname = dsname(newrootdev, unit, slice, part, partname);
 339         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 340         ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 341
 342         /*
 343          * For properly dangerously dedicated disks (ones with a historical
 344          * bogus partition table), the boot blocks will give slice = 4, but
 345          * the kernel will only provide the compatibility slice since it
 346          * knows that slice 4 is not a real slice.  Arrange to try mounting
 347          * the compatibility slice as root if mounting the slice passed by
 348          * the boot blocks fails.  This handles the dangerously dedicated
 349          * case and perhaps others.
 350          */
 351         if (slice == COMPATIBILITY_SLICE)
 352                 return;
 353         slice = COMPATIBILITY_SLICE;
 354         sname = dsname(newrootdev, unit, slice, part, partname);
 355         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 356         ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 357 }
 358 #endif
 359
 360 #if defined(NFS) && defined(NFS_ROOT)
 361 #if !defined(BOOTP_NFSROOT)
 362
 363 #include <sys/socket.h>
 364 #include <net/if.h>
 365 #include <net/if_dl.h>
 366 #include <net/if_types.h>
 367 #include <net/if_var.h>
 368 #include <net/ethernet.h>
 369 #include <netinet/in.h>
 370 #include <vfs/nfs/rpcv2.h>
 371 #include <vfs/nfs/nfsproto.h>
 372 #include <vfs/nfs/nfs.h>
 373 #include <vfs/nfs/nfsdiskless.h>
 374
 375 extern struct nfs_diskless      nfs_diskless;
 376
 377 /*
 378  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 379  * exist the sockaddr will remain zerod out (callers typically just check
 380  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 381  */
 382 static int
 383 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 384 {
 385         u_int32_t       a[4];
 386         char            *cp;
 387
 388         bzero(sa, sizeof(*sa));
 389
 390         if ((cp = kgetenv(ev)) == NULL)
 391                 return(1);
 392         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 393                 return(1);
 394         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 395                 return(1);
 396         /* XXX is this ordering correct? */
 397         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 398         sa->sin_len = sizeof(*sa);
 399         sa->sin_family = AF_INET;
 400         return(0);
 401 }
 402
 403 static int
 404 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 405 {
 406         char            *cp;
 407         u_int32_t       a[6];
 408
 409         bzero(sa, sizeof(*sa));
 410         sa->sdl_len = sizeof(*sa);
 411         sa->sdl_family = AF_LINK;
 412         sa->sdl_type = IFT_ETHER;
 413         sa->sdl_alen = ETHER_ADDR_LEN;
 414         if ((cp = kgetenv(ev)) == NULL)
 415                 return(1);
 416         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 417                 return(1);
 418         sa->sdl_data[0] = a[0];
 419         sa->sdl_data[1] = a[1];
 420         sa->sdl_data[2] = a[2];
 421         sa->sdl_data[3] = a[3];
 422         sa->sdl_data[4] = a[4];
 423         sa->sdl_data[5] = a[5];
 424         return(0);
 425 }
 426
 427 static int
 428 decode_nfshandle(char *ev, u_char *fh)
 429 {
 430         u_char  *cp;
 431         int     len, val;
 432
 433         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 434                 return(0);
 435         len = 0;
 436         cp++;
 437         for (;;) {
 438                 if (*cp == 'X')
 439                         return(len);
 440                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 441                         return(0);
 442                 *(fh++) = val;
 443                 len++;
 444                 cp += 2;
 445                 if (len > NFSX_V2FH)
 446                     return(0);
 447         }
 448 }
 449
 450 /*
 451  * Populate the essential fields in the nfsv3_diskless structure.
 452  *
 453  * The loader is expected to export the following environment variables:
 454  *
 455  * boot.netif.ip                IP address on boot interface
 456  * boot.netif.netmask           netmask on boot interface
 457  * boot.netif.gateway           default gateway (optional)
 458  * boot.netif.hwaddr            hardware address of boot interface
 459  * boot.nfsroot.server          IP address of root filesystem server
 460  * boot.nfsroot.path            path of the root filesystem on server
 461  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 462  */
 463 static void
 464 pxe_setup_nfsdiskless(void)
 465 {
 466         struct nfs_diskless     *nd = &nfs_diskless;
 467         struct ifnet            *ifp;
 468         struct ifaddr           *ifa;
 469         struct sockaddr_dl      *sdl, ourdl;
 470         struct sockaddr_in      myaddr, netmask;
 471         char                    *cp;
 472
 473         /* set up interface */
 474         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 475                 return;
 476         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 477                 kprintf("PXE: no netmask\n");
 478                 return;
 479         }
 480         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 481         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 482         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 483                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 484         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 485
 486         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 487                 kprintf("PXE: no hardware address\n");
 488                 return;
 489         }
 490         ifa = NULL;
 491         ifp = TAILQ_FIRST(&ifnet);
 492         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 493                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 494                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 495                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 496                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 497                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 498                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 499                                           ourdl.sdl_data + ourdl.sdl_nlen,
 500                                           sdl->sdl_alen))
 501                                     goto match_done;
 502                         }
 503                 }
 504         }
 505         kprintf("PXE: no interface\n");
 506         return; /* no matching interface */
 507 match_done:
 508         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 509
 510         /* set up gateway */
 511         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 512
 513         /* XXX set up swap? */
 514
 515         /* set up root mount */
 516         nd->root_args.rsize = 8192;             /* XXX tunable? */
 517         nd->root_args.wsize = 8192;
 518         nd->root_args.sotype = SOCK_DGRAM;
 519         nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
 520         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 521                 kprintf("PXE: no server\n");
 522                 return;
 523         }
 524         nd->root_saddr.sin_port = htons(NFS_PORT);
 525
 526         /*
 527          * A tftp-only loader may pass NFS path information without a
 528          * root handle.  Generate a warning but continue configuring.
 529          */
 530         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 531                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 532         }
 533         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 534                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 535
 536         nfs_diskless_valid = 1;
 537 }
 538
 539 #endif
 540 #endif