sys/platform/pc64/amd64/autoconf.c

   1 /*-
   2  * Copyright (c) 1990 The Regents of the University of California.
   3  * Copyright (c) 2008 The DragonFly Project.
   4  * All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * William Jolitz.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgement:
  19  *      This product includes software developed by the University of
  20  *      California, Berkeley and its contributors.
  21  * 4. Neither the name of the University nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  *
  37  *      from: @(#)autoconf.c    7.1 (Berkeley) 5/9/91
  38  * $FreeBSD: src/sys/i386/i386/autoconf.c,v 1.146.2.2 2001/06/07 06:05:58 dd Exp $
  39  * $DragonFly: src/sys/platform/pc64/amd64/autoconf.c,v 1.3 2008/08/29 17:07:10 dillon Exp $
  40  */
  41
  42 /*
  43  * Setup the system to run on the current machine.
  44  *
  45  * Configure() is called at boot time and initializes the vba
  46  * device tables and the memory controller monitoring.  Available
  47  * devices are determined (from possibilities mentioned in ioconf.c),
  48  * and the drivers are initialized.
  49  */
  50 #include "opt_bootp.h"
  51 #include "opt_ffs.h"
  52 #include "opt_cd9660.h"
  53 #include "opt_nfs.h"
  54 #include "opt_nfsroot.h"
  55 #include "opt_bus.h"
  56 #include "opt_rootdevname.h"
  57
  58 #include "use_isa.h"
  59
  60 #include <sys/param.h>
  61 #include <sys/systm.h>
  62 #include <sys/bootmaj.h>
  63 #include <sys/bus.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 <machine/bootinfo.h>
  76 #include <machine/md_var.h>
  77 #include <machine/smp.h>
  78 #include <machine_base/icu/icu.h>
  79
  80 #include <machine/pcb.h>
  81 #include <machine/pcb_ext.h>
  82 #include <machine/globaldata.h>
  83
  84 #if NISA > 0
  85 #include <bus/isa/isavar.h>
  86
  87 device_t isa_bus_device = 0;
  88 #endif
  89
  90 static void     configure_first (void *);
  91 static void     configure (void *);
  92 static void     configure_final (void *);
  93
  94 #if defined(FFS) && defined(FFS_ROOT)
  95 static void     setroot (void);
  96 #endif
  97
  98 #if defined(NFS) && defined(NFS_ROOT)
  99 #if !defined(BOOTP_NFSROOT)
 100 static void     pxe_setup_nfsdiskless(void);
 101 #endif
 102 #endif
 103
 104 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 105 /* SI_ORDER_SECOND is hookable */
 106 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 107 /* SI_ORDER_MIDDLE is hookable */
 108 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 109
 110 cdev_t  rootdev = NULL;
 111 cdev_t  dumpdev = NULL;
 112
 113 /*
 114  * Determine i/o configuration for a machine.
 115  */
 116 static void
 117 configure_first(void *dummy)
 118 {
 119 }
 120
 121 static void
 122 configure(void *dummy)
 123 {
 124         /*
 125          * This will configure all devices, generally starting with the
 126          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 127          * dummies up the attach in order to delay legacy initialization
 128          * until after all other busses/subsystems have had a chance
 129          * at those resources.
 130          */
 131         root_bus_configure();
 132
 133 #if NISA > 0
 134         /*
 135          * Explicitly probe and attach ISA last.  The isa bus saves
 136          * it's device node at attach time for us here.
 137          */
 138         if (isa_bus_device)
 139                 isa_probe_children(isa_bus_device);
 140 #endif
 141
 142         /*
 143          * Allow lowering of the ipl to the lowest kernel level if we
 144          * panic (or call tsleep() before clearing `cold').  No level is
 145          * completely safe (since a panic may occur in a critical region
 146          * at splhigh()), but we want at least bio interrupts to work.
 147          */
 148         safepri = TDPRI_KERN_USER;
 149 }
 150
 151 static void
 152 configure_final(void *dummy)
 153 {
 154         cninit_finish();
 155
 156         if (bootverbose) {
 157 #ifdef APIC_IO
 158                 imen_dump();
 159 #endif /* APIC_IO */
 160
 161 #if JG
 162                 /*
 163                  * Print out the BIOS's idea of the disk geometries.
 164                  */
 165                 int i;
 166                 kprintf("BIOS Geometries:\n");
 167                 for (i = 0; i < N_BIOS_GEOM; i++) {
 168                         unsigned long bios_geom;
 169                         int max_cylinder, max_head, max_sector;
 170
 171                         bios_geom = bootinfo.bi_bios_geom[i];
 172
 173                         /*
 174                          * XXX the bootstrap punts a 1200K floppy geometry
 175                          * when the get-disk-geometry interrupt fails.  Skip
 176                          * drives that have this geometry.
 177                          */
 178                         if (bios_geom == 0x4f010f)
 179                                 continue;
 180
 181                         kprintf(" %x:%08lx ", i, bios_geom);
 182                         max_cylinder = bios_geom >> 16;
 183                         max_head = (bios_geom >> 8) & 0xff;
 184                         max_sector = bios_geom & 0xff;
 185                         kprintf(
 186                 "0..%d=%d cylinders, 0..%d=%d heads, 1..%d=%d sectors\n",
 187                                max_cylinder, max_cylinder + 1,
 188                                max_head, max_head + 1,
 189                                max_sector, max_sector);
 190                 }
 191                 kprintf(" %d accounted for\n", bootinfo.bi_n_bios_used);
 192
 193                 kprintf("Device configuration finished.\n");
 194 #endif
 195         }
 196 }
 197
 198 #ifdef BOOTP
 199 void bootpc_init(void);
 200 #endif
 201 /*
 202  * Do legacy root filesystem discovery.
 203  */
 204 void
 205 cpu_rootconf(void)
 206 {
 207 #ifdef BOOTP
 208         bootpc_init();
 209 #endif
 210 #if defined(NFS) && defined(NFS_ROOT)
 211 #if !defined(BOOTP_NFSROOT)
 212         pxe_setup_nfsdiskless();
 213         if (nfs_diskless_valid)
 214 #endif
 215                 rootdevnames[0] = "nfs:";
 216 #endif
 217 #if defined(FFS) && defined(FFS_ROOT)
 218         if (!rootdevnames[0])
 219                 setroot();
 220 #endif
 221 }
 222 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 223
 224 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 225
 226 #if defined(FFS) && defined(FFS_ROOT)
 227 #define FDMAJOR         2
 228 #define FDUNITSHIFT     6
 229
 230 /*
 231  * The boot code uses old block device major numbers to pass bootdev to
 232  * us.  We have to translate these to character device majors because
 233  * we don't have block devices any more.
 234  */
 235 static int
 236 boot_translate_majdev(int bmajor)
 237 {
 238         static int conv[] = { BOOTMAJOR_CONVARY };
 239
 240         if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
 241                 return(conv[bmajor]);
 242         return(-1);
 243 }
 244
 245 /*
 246  * Attempt to find the device from which we were booted.
 247  * If we can do so, and not instructed not to do so,
 248  * set rootdevs[] and rootdevnames[] to correspond to the
 249  * boot device(s).
 250  *
 251  * This code survives in order to allow the system to be
 252  * booted from legacy environments that do not correctly
 253  * populate the kernel environment. There are significant
 254  * restrictions on the bootability of the system in this
 255  * situation; it can only be mounting root from a 'da'
 256  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 257  */
 258 static void
 259 setroot(void)
 260 {
 261         int majdev, mindev, unit, slice, part;
 262         cdev_t newrootdev, dev;
 263         char partname[2];
 264         char *sname;
 265
 266         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 267                 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 268                 return;
 269         }
 270         majdev = boot_translate_majdev(B_TYPE(bootdev));
 271         if (bootverbose) {
 272                 kprintf("bootdev: %08lx type=%ld unit=%ld "
 273                         "slice=%ld part=%ld major=%d\n",
 274                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 275                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 276         }
 277         dev = udev2dev(makeudev(majdev, 0), 0);
 278         if (!dev_is_good(dev))
 279                 return;
 280         unit = B_UNIT(bootdev);
 281         slice = B_SLICE(bootdev);
 282         if (slice == WHOLE_DISK_SLICE)
 283                 slice = COMPATIBILITY_SLICE;
 284         if (slice < 0 || slice >= MAX_SLICES) {
 285                 kprintf("bad slice\n");
 286                 return;
 287         }
 288
 289         part = B_PARTITION(bootdev);
 290         mindev = dkmakeminor(unit, slice, part);
 291         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 292         if (!dev_is_good(newrootdev))
 293                 return;
 294         sname = dsname(newrootdev, unit, slice, part, partname);
 295         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 296         ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 297
 298         /*
 299          * For properly dangerously dedicated disks (ones with a historical
 300          * bogus partition table), the boot blocks will give slice = 4, but
 301          * the kernel will only provide the compatibility slice since it
 302          * knows that slice 4 is not a real slice.  Arrange to try mounting
 303          * the compatibility slice as root if mounting the slice passed by
 304          * the boot blocks fails.  This handles the dangerously dedicated
 305          * case and perhaps others.
 306          */
 307         if (slice == COMPATIBILITY_SLICE)
 308                 return;
 309         slice = COMPATIBILITY_SLICE;
 310         sname = dsname(newrootdev, unit, slice, part, partname);
 311         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 312         ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 313 }
 314 #endif
 315
 316 #if defined(NFS) && defined(NFS_ROOT)
 317 #if !defined(BOOTP_NFSROOT)
 318
 319 #include <sys/socket.h>
 320 #include <net/if.h>
 321 #include <net/if_dl.h>
 322 #include <net/if_types.h>
 323 #include <net/if_var.h>
 324 #include <net/ethernet.h>
 325 #include <netinet/in.h>
 326 #include <vfs/nfs/rpcv2.h>
 327 #include <vfs/nfs/nfsproto.h>
 328 #include <vfs/nfs/nfs.h>
 329 #include <vfs/nfs/nfsdiskless.h>
 330
 331 extern struct nfs_diskless      nfs_diskless;
 332
 333 /*
 334  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 335  * exist the sockaddr will remain zerod out (callers typically just check
 336  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 337  */
 338 static int
 339 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 340 {
 341         u_int32_t       a[4];
 342         char            *cp;
 343
 344         bzero(sa, sizeof(*sa));
 345
 346         if ((cp = kgetenv(ev)) == NULL)
 347                 return(1);
 348         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 349                 return(1);
 350         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 351                 return(1);
 352         /* XXX is this ordering correct? */
 353         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 354         sa->sin_len = sizeof(*sa);
 355         sa->sin_family = AF_INET;
 356         return(0);
 357 }
 358
 359 static int
 360 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 361 {
 362         char            *cp;
 363         u_int32_t       a[6];
 364
 365         bzero(sa, sizeof(*sa));
 366         sa->sdl_len = sizeof(*sa);
 367         sa->sdl_family = AF_LINK;
 368         sa->sdl_type = IFT_ETHER;
 369         sa->sdl_alen = ETHER_ADDR_LEN;
 370         if ((cp = kgetenv(ev)) == NULL)
 371                 return(1);
 372         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 373                 return(1);
 374         sa->sdl_data[0] = a[0];
 375         sa->sdl_data[1] = a[1];
 376         sa->sdl_data[2] = a[2];
 377         sa->sdl_data[3] = a[3];
 378         sa->sdl_data[4] = a[4];
 379         sa->sdl_data[5] = a[5];
 380         return(0);
 381 }
 382
 383 static int
 384 decode_nfshandle(char *ev, u_char *fh)
 385 {
 386         u_char  *cp;
 387         int     len, val;
 388
 389         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 390                 return(0);
 391         len = 0;
 392         cp++;
 393         for (;;) {
 394                 if (*cp == 'X')
 395                         return(len);
 396                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 397                         return(0);
 398                 *(fh++) = val;
 399                 len++;
 400                 cp += 2;
 401                 if (len > NFSX_V2FH)
 402                     return(0);
 403         }
 404 }
 405
 406 /*
 407  * Populate the essential fields in the nfsv3_diskless structure.
 408  *
 409  * The loader is expected to export the following environment variables:
 410  *
 411  * boot.netif.ip                IP address on boot interface
 412  * boot.netif.netmask           netmask on boot interface
 413  * boot.netif.gateway           default gateway (optional)
 414  * boot.netif.hwaddr            hardware address of boot interface
 415  * boot.nfsroot.server          IP address of root filesystem server
 416  * boot.nfsroot.path            path of the root filesystem on server
 417  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 418  */
 419 static void
 420 pxe_setup_nfsdiskless(void)
 421 {
 422         struct nfs_diskless     *nd = &nfs_diskless;
 423         struct ifnet            *ifp;
 424         struct sockaddr_dl      *sdl, ourdl;
 425         struct sockaddr_in      myaddr, netmask;
 426         char                    *cp;
 427
 428         /* set up interface */
 429         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 430                 return;
 431         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 432                 kprintf("PXE: no netmask\n");
 433                 return;
 434         }
 435         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 436         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 437         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 438                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 439         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 440
 441         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 442                 kprintf("PXE: no hardware address\n");
 443                 return;
 444         }
 445         ifp = TAILQ_FIRST(&ifnet);
 446         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 447                 struct ifaddr_container *ifac;
 448
 449                 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
 450                         struct ifaddr *ifa = ifac->ifa;
 451
 452                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 453                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 454                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 455                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 456                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 457                                           ourdl.sdl_data + ourdl.sdl_nlen,
 458                                           sdl->sdl_alen))
 459                                     goto match_done;
 460                         }
 461                 }
 462         }
 463         kprintf("PXE: no interface\n");
 464         return; /* no matching interface */
 465 match_done:
 466         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 467
 468         /* set up gateway */
 469         inaddr_to_sockaddr("boot.netif.gateway", &nd->mygateway);
 470
 471         /* XXX set up swap? */
 472
 473         /* set up root mount */
 474         nd->root_args.rsize = 8192;             /* XXX tunable? */
 475         nd->root_args.wsize = 8192;
 476         nd->root_args.sotype = SOCK_DGRAM;
 477         nd->root_args.flags = (NFSMNT_WSIZE | NFSMNT_RSIZE | NFSMNT_RESVPORT);
 478         if (inaddr_to_sockaddr("boot.nfsroot.server", &nd->root_saddr)) {
 479                 kprintf("PXE: no server\n");
 480                 return;
 481         }
 482         nd->root_saddr.sin_port = htons(NFS_PORT);
 483
 484         /*
 485          * A tftp-only loader may pass NFS path information without a
 486          * root handle.  Generate a warning but continue configuring.
 487          */
 488         if (decode_nfshandle("boot.nfsroot.nfshandle", &nd->root_fh[0]) == 0) {
 489                 kprintf("PXE: Warning, no NFS handle passed from loader\n");
 490         }
 491         if ((cp = kgetenv("boot.nfsroot.path")) != NULL)
 492                 strncpy(nd->root_hostnam, cp, MNAMELEN - 1);
 493
 494         nfs_diskless_valid = 1;
 495 }
 496
 497 #endif
 498 #endif