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 1.6 2007/01/05 22:18:18 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
  88 #if NISA > 0
  89 #include <bus/isa/isavar.h>
  90
  91 device_t isa_bus_device = 0;
  92 #endif
  93
  94 static void cpu_startup (void *);
  95 static void configure_first (void *);
  96 static void configure (void *);
  97 static void configure_final (void *);
  98
  99 #if defined(FFS) && defined(FFS_ROOT)
 100 static void     setroot (void);
 101 #endif
 102
 103 #if defined(NFS) && defined(NFS_ROOT)
 104 #if !defined(BOOTP_NFSROOT)
 105 static void     pxe_setup_nfsdiskless(void);
 106 #endif
 107 #endif
 108
 109 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
 110 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 111 /* SI_ORDER_SECOND is hookable */
 112 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 113 /* SI_ORDER_MIDDLE is hookable */
 114 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 115
 116 cdev_t  rootdev = NOCDEV;
 117 cdev_t  dumpdev = NOCDEV;
 118
 119 /*
 120  *
 121  */
 122 static void
 123 cpu_startup(void *dummy)
 124 {
 125         vm_offset_t buffer_sva;
 126         vm_offset_t buffer_eva;
 127         vm_offset_t pager_sva;
 128         vm_offset_t pager_eva;
 129         vm_offset_t minaddr;
 130         vm_offset_t maxaddr;
 131
 132         kprintf("%s", version);
 133         kprintf("real memory = %llu (%lluK bytes)\n",
 134                 ptoa(Maxmem), ptoa(Maxmem) / 1024);
 135
 136         if (nbuf == 0) {
 137                 int factor = 4 * BKVASIZE / 1024;
 138                 int kbytes = physmem * (PAGE_SIZE / 1024);
 139
 140                 nbuf = 50;
 141                 if (kbytes > 4096)
 142                         nbuf += min((kbytes - 4096) / factor, 65536 / factor);
 143                 if (kbytes > 65536)
 144                         nbuf += (kbytes - 65536) * 2 / (factor * 5);
 145                 if (maxbcache && nbuf > maxbcache / BKVASIZE)
 146                         nbuf = maxbcache / BKVASIZE;
 147         }
 148         if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
 149                 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
 150                 kprintf("Warning: nbufs capped at %d\n", nbuf);
 151         }
 152
 153         nswbuf = max(min(nbuf/4, 256), 16);
 154 #ifdef NSWBUF_MIN
 155         if (nswbuf < NSWBUF_MIN)
 156                 nswbuf = NSWBUF_MIN;
 157 #endif
 158 #ifdef DIRECTIO
 159         ffs_rawread_setup();
 160 #endif
 161         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 162                       (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
 163         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 164                       (nbuf*BKVASIZE));
 165         buffer_map.system_map = 1;
 166         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 167                       (nswbuf*MAXPHYS) + pager_map_size);
 168         pager_map.system_map = 1;
 169         kmem_suballoc(&kernel_map, &exec_map, &minaddr, &maxaddr,
 170                       (16*(ARG_MAX+(PAGE_SIZE*3))));
 171 #if defined(USERCONFIG)
 172         userconfig();
 173         cninit();               /* the preferred console may have changed */
 174 #endif
 175         kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats.v_free_count),
 176                 ptoa(vmstats.v_free_count) / 1024);
 177         bufinit();
 178         vm_pager_bufferinit();
 179 #ifdef SMP
 180         mp_start();
 181         mp_announce();
 182 #endif
 183         cpu_setregs();
 184 }
 185
 186 /*
 187  * Determine i/o configuration for a machine.
 188  */
 189 static void
 190 configure_first(void *dummy)
 191 {
 192 }
 193
 194 static void
 195 configure(void *dummy)
 196 {
 197         /*
 198          * Final interrupt support acviation, then enable hardware interrupts.
 199          */
 200         MachIntrABI.finalize();
 201         cpu_enable_intr();
 202
 203         /*
 204          * This will configure all devices, generally starting with the
 205          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 206          * dummies up the attach in order to delay legacy initialization
 207          * until after all other busses/subsystems have had a chance
 208          * at those resources.
 209          */
 210         root_bus_configure();
 211
 212 #if NISA > 0
 213         /*
 214          * Explicitly probe and attach ISA last.  The isa bus saves
 215          * it's device node at attach time for us here.
 216          */
 217         if (isa_bus_device)
 218                 isa_probe_children(isa_bus_device);
 219 #endif
 220
 221         /*
 222          * Allow lowering of the ipl to the lowest kernel level if we
 223          * panic (or call tsleep() before clearing `cold').  No level is
 224          * completely safe (since a panic may occur in a critical region
 225          * at splhigh()), but we want at least bio interrupts to work.
 226          */
 227         safepri = TDPRI_KERN_USER;
 228 }
 229
 230 static void
 231 configure_final(void *dummy)
 232 {
 233         cninit_finish();
 234
 235         if (bootverbose)
 236                 kprintf("Device configuration finished.\n");
 237         cold = 0;
 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 < sizeof(conv)/sizeof(conv[0]))
 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.nfsroot.server          IP address of root filesystem server
 456  * boot.nfsroot.path            path of the root filesystem on server
 457  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 458  */
 459 static void
 460 pxe_setup_nfsdiskless(void)
 461 {
 462         struct nfs_diskless     *nd = &nfs_diskless;
 463         struct ifnet            *ifp;
 464         struct ifaddr           *ifa;
 465         struct sockaddr_dl      *sdl, ourdl;
 466         struct sockaddr_in      myaddr, netmask;
 467         char                    *cp;
 468
 469         /* set up interface */
 470         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 471                 return;
 472         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 473                 kprintf("PXE: no netmask\n");
 474                 return;
 475         }
 476         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 477         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 478         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 479                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 480         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 481
 482         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 483                 kprintf("PXE: no hardware address\n");
 484                 return;
 485         }
 486         ifa = NULL;
 487         ifp = TAILQ_FIRST(&ifnet);
 488         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 489                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 490                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 491                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 492                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 493                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 494                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 495                                           ourdl.sdl_data + ourdl.sdl_nlen,
 496                                           sdl->sdl_alen))
 497                                     goto match_done;
 498                         }
 499                 }
 500         }
 501         kprintf("PXE: no interface\n");
 502         return; /* no matching interface */
 503 match_done:
 504         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 505
 506         /* set up gateway */
 507         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 508
 509         /* XXX set up swap? */
 510
 511         /* set up root mount */
 512         nd->root_args.rsize = 8192;             /* XXX tunable? */
 513         nd->root_args.wsize = 8192;
 514         nd->root_args.sotype = SOCK_DGRAM;
 515         nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
 516         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 517                 kprintf("PXE: no server\n");
 518                 return;
 519         }
 520         nd->root_saddr.sin_port = htons(NFS_PORT);
 521
 522         /*
 523          * A tftp-only loader may pass NFS path information without a
 524          * root handle.  Generate a warning but continue configuring.
 525          */
 526         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 527                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 528         }
 529         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 530                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 531
 532         nfs_diskless_valid = 1;
 533 }
 534
 535 #endif
 536 #endif