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 1.14 2007/06/18 18:57:12 josepht 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("JAT: cpu_startup() start\n");
 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 = Maxmem * (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
 159         /*
 160          * Allocate memory for the buffer cache
 161          */
 162         buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
 163         swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
 164
 165
 166 #ifdef DIRECTIO
 167         ffs_rawread_setup();
 168 #endif
 169         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 170                       (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
 171         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 172                       (nbuf*BKVASIZE));
 173         buffer_map.system_map = 1;
 174         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 175                       (nswbuf*MAXPHYS) + pager_map_size);
 176         pager_map.system_map = 1;
 177 #if defined(USERCONFIG)
 178         userconfig();
 179         cninit();               /* the preferred console may have changed */
 180 #endif
 181         kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats.v_free_count),
 182                 ptoa(vmstats.v_free_count) / 1024);
 183         bufinit();
 184         vm_pager_bufferinit();
 185 #ifdef SMP
 186         mp_start();
 187         mp_announce();
 188 #endif
 189         cpu_setregs();
 190         kprintf("JAT: cpu_startup() end\n");
 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         kprintf("JAT: configure() start\n");
 205         /*
 206          * Final interrupt support acviation, then enable hardware interrupts.
 207          */
 208         MachIntrABI.finalize();
 209         cpu_enable_intr();
 210
 211         /*
 212          * This will configure all devices, generally starting with the
 213          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 214          * dummies up the attach in order to delay legacy initialization
 215          * until after all other busses/subsystems have had a chance
 216          * at those resources.
 217          */
 218         root_bus_configure();
 219
 220 #if NISA > 0
 221         /*
 222          * Explicitly probe and attach ISA last.  The isa bus saves
 223          * it's device node at attach time for us here.
 224          */
 225         if (isa_bus_device)
 226                 isa_probe_children(isa_bus_device);
 227 #endif
 228
 229         /*
 230          * Allow lowering of the ipl to the lowest kernel level if we
 231          * panic (or call tsleep() before clearing `cold').  No level is
 232          * completely safe (since a panic may occur in a critical region
 233          * at splhigh()), but we want at least bio interrupts to work.
 234          */
 235         safepri = TDPRI_KERN_USER;
 236         kprintf("JAT: configure() end\n");
 237 }
 238
 239 static void
 240 configure_final(void *dummy)
 241 {
 242         kprintf("JAT: configure_final() start\n");
 243         cninit_finish();
 244
 245         if (bootverbose)
 246                 kprintf("Device configuration finished.\n");
 247         kprintf("JAT: configure_final() end\n");
 248 }
 249
 250 #ifdef BOOTP
 251 void bootpc_init(void);
 252 #endif
 253 /*
 254  * Do legacy root filesystem discovery.
 255  */
 256 void
 257 cpu_rootconf(void)
 258 {
 259         kprintf("JAT: cpu_rootconf() start\n");
 260 #ifdef BOOTP
 261         bootpc_init();
 262 #endif
 263 #if defined(NFS) && defined(NFS_ROOT)
 264 #if !defined(BOOTP_NFSROOT)
 265         pxe_setup_nfsdiskless();
 266         if (nfs_diskless_valid)
 267 #endif
 268                 rootdevnames[0] = "nfs:";
 269 #endif
 270 #if defined(FFS) && defined(FFS_ROOT)
 271         if (!rootdevnames[0])
 272                 setroot();
 273 #endif
 274         kprintf("JAT: cpu_rootconf() end\n");
 275 }
 276 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 277
 278 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 279
 280 #if defined(FFS) && defined(FFS_ROOT)
 281
 282 /*
 283  * The boot code uses old block device major numbers to pass bootdev to
 284  * us.  We have to translate these to character device majors because
 285  * we don't have block devices any more.
 286  */
 287 static int
 288 boot_translate_majdev(int bmajor)
 289 {
 290         static int conv[] = { BOOTMAJOR_CONVARY };
 291
 292         if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
 293                 return(conv[bmajor]);
 294         return(-1);
 295 }
 296
 297 /*
 298  * Attempt to find the device from which we were booted.
 299  * If we can do so, and not instructed not to do so,
 300  * set rootdevs[] and rootdevnames[] to correspond to the
 301  * boot device(s).
 302  *
 303  * This code survives in order to allow the system to be
 304  * booted from legacy environments that do not correctly
 305  * populate the kernel environment. There are significant
 306  * restrictions on the bootability of the system in this
 307  * situation; it can only be mounting root from a 'da'
 308  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 309  */
 310 static void
 311 setroot(void)
 312 {
 313         int majdev, mindev, unit, slice, part;
 314         cdev_t newrootdev, dev;
 315         char partname[2];
 316         char *sname;
 317
 318         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 319                 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 320                 return;
 321         }
 322         majdev = boot_translate_majdev(B_TYPE(bootdev));
 323         if (bootverbose) {
 324                 kprintf("bootdev: %08lx type=%ld unit=%ld "
 325                         "slice=%ld part=%ld major=%d\n",
 326                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 327                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 328         }
 329         dev = udev2dev(makeudev(majdev, 0), 0);
 330         if (!dev_is_good(dev))
 331                 return;
 332         unit = B_UNIT(bootdev);
 333         slice = B_SLICE(bootdev);
 334         if (slice == WHOLE_DISK_SLICE)
 335                 slice = COMPATIBILITY_SLICE;
 336         if (slice < 0 || slice >= MAX_SLICES) {
 337                 kprintf("bad slice\n");
 338                 return;
 339         }
 340
 341         part = B_PARTITION(bootdev);
 342         mindev = dkmakeminor(unit, slice, part);
 343         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 344         if (!dev_is_good(newrootdev))
 345                 return;
 346         sname = dsname(newrootdev, unit, slice, part, partname);
 347         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 348         ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 349
 350         /*
 351          * For properly dangerously dedicated disks (ones with a historical
 352          * bogus partition table), the boot blocks will give slice = 4, but
 353          * the kernel will only provide the compatibility slice since it
 354          * knows that slice 4 is not a real slice.  Arrange to try mounting
 355          * the compatibility slice as root if mounting the slice passed by
 356          * the boot blocks fails.  This handles the dangerously dedicated
 357          * case and perhaps others.
 358          */
 359         if (slice == COMPATIBILITY_SLICE)
 360                 return;
 361         slice = COMPATIBILITY_SLICE;
 362         sname = dsname(newrootdev, unit, slice, part, partname);
 363         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 364         ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 365 }
 366 #endif
 367
 368 #if defined(NFS) && defined(NFS_ROOT)
 369 #if !defined(BOOTP_NFSROOT)
 370
 371 #include <sys/socket.h>
 372 #include <net/if.h>
 373 #include <net/if_dl.h>
 374 #include <net/if_types.h>
 375 #include <net/if_var.h>
 376 #include <net/ethernet.h>
 377 #include <netinet/in.h>
 378 #include <vfs/nfs/rpcv2.h>
 379 #include <vfs/nfs/nfsproto.h>
 380 #include <vfs/nfs/nfs.h>
 381 #include <vfs/nfs/nfsdiskless.h>
 382
 383 extern struct nfs_diskless      nfs_diskless;
 384
 385 /*
 386  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 387  * exist the sockaddr will remain zerod out (callers typically just check
 388  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 389  */
 390 static int
 391 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 392 {
 393         u_int32_t       a[4];
 394         char            *cp;
 395
 396         bzero(sa, sizeof(*sa));
 397
 398         if ((cp = kgetenv(ev)) == NULL)
 399                 return(1);
 400         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 401                 return(1);
 402         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 403                 return(1);
 404         /* XXX is this ordering correct? */
 405         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 406         sa->sin_len = sizeof(*sa);
 407         sa->sin_family = AF_INET;
 408         return(0);
 409 }
 410
 411 static int
 412 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 413 {
 414         char            *cp;
 415         u_int32_t       a[6];
 416
 417         bzero(sa, sizeof(*sa));
 418         sa->sdl_len = sizeof(*sa);
 419         sa->sdl_family = AF_LINK;
 420         sa->sdl_type = IFT_ETHER;
 421         sa->sdl_alen = ETHER_ADDR_LEN;
 422         if ((cp = kgetenv(ev)) == NULL)
 423                 return(1);
 424         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 425                 return(1);
 426         sa->sdl_data[0] = a[0];
 427         sa->sdl_data[1] = a[1];
 428         sa->sdl_data[2] = a[2];
 429         sa->sdl_data[3] = a[3];
 430         sa->sdl_data[4] = a[4];
 431         sa->sdl_data[5] = a[5];
 432         return(0);
 433 }
 434
 435 static int
 436 decode_nfshandle(char *ev, u_char *fh)
 437 {
 438         u_char  *cp;
 439         int     len, val;
 440
 441         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 442                 return(0);
 443         len = 0;
 444         cp++;
 445         for (;;) {
 446                 if (*cp == 'X')
 447                         return(len);
 448                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 449                         return(0);
 450                 *(fh++) = val;
 451                 len++;
 452                 cp += 2;
 453                 if (len > NFSX_V2FH)
 454                     return(0);
 455         }
 456 }
 457
 458 /*
 459  * Populate the essential fields in the nfsv3_diskless structure.
 460  *
 461  * The loader is expected to export the following environment variables:
 462  *
 463  * boot.netif.ip                IP address on boot interface
 464  * boot.netif.netmask           netmask on boot interface
 465  * boot.netif.gateway           default gateway (optional)
 466  * boot.netif.hwaddr            hardware address of boot interface
 467  * boot.nfsroot.server          IP address of root filesystem server
 468  * boot.nfsroot.path            path of the root filesystem on server
 469  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 470  */
 471 static void
 472 pxe_setup_nfsdiskless(void)
 473 {
 474         struct nfs_diskless     *nd = &nfs_diskless;
 475         struct ifnet            *ifp;
 476         struct ifaddr           *ifa;
 477         struct sockaddr_dl      *sdl, ourdl;
 478         struct sockaddr_in      myaddr, netmask;
 479         char                    *cp;
 480
 481         /* set up interface */
 482         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 483                 return;
 484         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 485                 kprintf("PXE: no netmask\n");
 486                 return;
 487         }
 488         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 489         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 490         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 491                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 492         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 493
 494         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 495                 kprintf("PXE: no hardware address\n");
 496                 return;
 497         }
 498         ifa = NULL;
 499         ifp = TAILQ_FIRST(&ifnet);
 500         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 501                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 502                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 503                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 504                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 505                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 506                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 507                                           ourdl.sdl_data + ourdl.sdl_nlen,
 508                                           sdl->sdl_alen))
 509                                     goto match_done;
 510                         }
 511                 }
 512         }
 513         kprintf("PXE: no interface\n");
 514         return; /* no matching interface */
 515 match_done:
 516         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 517
 518         /* set up gateway */
 519         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 520
 521         /* XXX set up swap? */
 522
 523         /* set up root mount */
 524         nd->root_args.rsize = 8192;             /* XXX tunable? */
 525         nd->root_args.wsize = 8192;
 526         nd->root_args.sotype = SOCK_DGRAM;
 527         nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
 528         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 529                 kprintf("PXE: no server\n");
 530                 return;
 531         }
 532         nd->root_saddr.sin_port = htons(NFS_PORT);
 533
 534         /*
 535          * A tftp-only loader may pass NFS path information without a
 536          * root handle.  Generate a warning but continue configuring.
 537          */
 538         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 539                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 540         }
 541         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 542                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 543
 544         nfs_diskless_valid = 1;
 545 }
 546
 547 #endif
 548 #endif