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 #include <signal.h>
  96 #include <err.h>
  97
  98 void ipi_handler(int);
  99
 100 static void cpu_startup (void *);
 101 static void configure_first (void *);
 102 static void configure (void *);
 103 static void configure_final (void *);
 104
 105 #if defined(FFS) && defined(FFS_ROOT)
 106 static void     setroot (void);
 107 #endif
 108
 109 #if defined(NFS) && defined(NFS_ROOT)
 110 #if !defined(BOOTP_NFSROOT)
 111 static void     pxe_setup_nfsdiskless(void);
 112 #endif
 113 #endif
 114
 115 SYSINIT(cpu, SI_BOOT2_SMP, SI_ORDER_FIRST, cpu_startup, NULL);
 116 SYSINIT(configure1, SI_SUB_CONFIGURE, SI_ORDER_FIRST, configure_first, NULL);
 117 /* SI_ORDER_SECOND is hookable */
 118 SYSINIT(configure2, SI_SUB_CONFIGURE, SI_ORDER_THIRD, configure, NULL);
 119 /* SI_ORDER_MIDDLE is hookable */
 120 SYSINIT(configure3, SI_SUB_CONFIGURE, SI_ORDER_ANY, configure_final, NULL);
 121
 122 cdev_t  rootdev = NULL;
 123 cdev_t  dumpdev = NULL;
 124
 125 void
 126 ipi_handler(int sig)
 127 {
 128         kprintf("ipi_handler: sig = %d\n", sig);
 129 }
 130
 131 /*
 132  *
 133  */
 134 static void
 135 cpu_startup(void *dummy)
 136 {
 137         vm_offset_t buffer_sva;
 138         vm_offset_t buffer_eva;
 139         vm_offset_t pager_sva;
 140         vm_offset_t pager_eva;
 141
 142 #if 0
 143         if (signal(SIGUSR1, ipi_handler) == SIG_ERR)
 144                 warn("signal failed");
 145         else
 146                 kprintf("signal set up\n");
 147 #endif
 148
 149
 150         kprintf("%s", version);
 151         kprintf("real memory = %llu (%lluK bytes)\n",
 152                 ptoa(Maxmem), ptoa(Maxmem) / 1024);
 153
 154         if (nbuf == 0) {
 155                 int factor = 4 * BKVASIZE / 1024;
 156                 int kbytes = Maxmem * (PAGE_SIZE / 1024);
 157
 158                 nbuf = 50;
 159                 if (kbytes > 4096)
 160                         nbuf += min((kbytes - 4096) / factor, 65536 / factor);
 161                 if (kbytes > 65536)
 162                         nbuf += (kbytes - 65536) * 2 / (factor * 5);
 163                 if (maxbcache && nbuf > maxbcache / BKVASIZE)
 164                         nbuf = maxbcache / BKVASIZE;
 165         }
 166         if (nbuf > (virtual_end - virtual_start) / (BKVASIZE * 2)) {
 167                 nbuf = (virtual_end - virtual_start) / (BKVASIZE * 2);
 168                 kprintf("Warning: nbufs capped at %d\n", nbuf);
 169         }
 170
 171         nswbuf = max(min(nbuf/4, 256), 16);
 172 #ifdef NSWBUF_MIN
 173         if (nswbuf < NSWBUF_MIN)
 174                 nswbuf = NSWBUF_MIN;
 175 #endif
 176
 177         /*
 178          * Allocate memory for the buffer cache
 179          */
 180         buf = (void *)kmem_alloc(&kernel_map, nbuf * sizeof(struct buf));
 181         swbuf = (void *)kmem_alloc(&kernel_map, nswbuf * sizeof(struct buf));
 182
 183
 184 #ifdef DIRECTIO
 185         ffs_rawread_setup();
 186 #endif
 187         kmem_suballoc(&kernel_map, &clean_map, &clean_sva, &clean_eva,
 188                       (nbuf*BKVASIZE) + (nswbuf*MAXPHYS) + pager_map_size);
 189         kmem_suballoc(&clean_map, &buffer_map, &buffer_sva, &buffer_eva,
 190                       (nbuf*BKVASIZE));
 191         buffer_map.system_map = 1;
 192         kmem_suballoc(&clean_map, &pager_map, &pager_sva, &pager_eva,
 193                       (nswbuf*MAXPHYS) + pager_map_size);
 194         pager_map.system_map = 1;
 195 #if defined(USERCONFIG)
 196         userconfig();
 197         cninit();               /* the preferred console may have changed */
 198 #endif
 199         kprintf("avail memory = %u (%uK bytes)\n", ptoa(vmstats.v_free_count),
 200                 ptoa(vmstats.v_free_count) / 1024);
 201         bufinit();
 202         vm_pager_bufferinit();
 203 #ifdef SMP
 204         mp_start();
 205         mp_announce();
 206 #endif
 207         cpu_setregs();
 208 }
 209
 210 /*
 211  * Determine i/o configuration for a machine.
 212  */
 213 static void
 214 configure_first(void *dummy)
 215 {
 216 }
 217
 218 static void
 219 configure(void *dummy)
 220 {
 221         /*
 222          * Final interrupt support acviation, then enable hardware interrupts.
 223          */
 224         MachIntrABI.finalize();
 225         cpu_enable_intr();
 226
 227         /*
 228          * This will configure all devices, generally starting with the
 229          * nexus (i386/i386/nexus.c).  The nexus ISA code explicitly
 230          * dummies up the attach in order to delay legacy initialization
 231          * until after all other busses/subsystems have had a chance
 232          * at those resources.
 233          */
 234         root_bus_configure();
 235
 236 #if NISA > 0
 237         /*
 238          * Explicitly probe and attach ISA last.  The isa bus saves
 239          * it's device node at attach time for us here.
 240          */
 241         if (isa_bus_device)
 242                 isa_probe_children(isa_bus_device);
 243 #endif
 244
 245         /*
 246          * Allow lowering of the ipl to the lowest kernel level if we
 247          * panic (or call tsleep() before clearing `cold').  No level is
 248          * completely safe (since a panic may occur in a critical region
 249          * at splhigh()), but we want at least bio interrupts to work.
 250          */
 251         safepri = TDPRI_KERN_USER;
 252 }
 253
 254 static void
 255 configure_final(void *dummy)
 256 {
 257         cninit_finish();
 258
 259         if (bootverbose)
 260                 kprintf("Device configuration finished.\n");
 261 }
 262
 263 #ifdef BOOTP
 264 void bootpc_init(void);
 265 #endif
 266 /*
 267  * Do legacy root filesystem discovery.
 268  */
 269 void
 270 cpu_rootconf(void)
 271 {
 272 #ifdef BOOTP
 273         bootpc_init();
 274 #endif
 275 #if defined(NFS) && defined(NFS_ROOT)
 276 #if !defined(BOOTP_NFSROOT)
 277         pxe_setup_nfsdiskless();
 278         if (nfs_diskless_valid)
 279 #endif
 280                 rootdevnames[0] = "nfs:";
 281 #endif
 282 #if defined(FFS) && defined(FFS_ROOT)
 283         if (!rootdevnames[0])
 284                 setroot();
 285 #endif
 286 }
 287 SYSINIT(cpu_rootconf, SI_SUB_ROOT_CONF, SI_ORDER_FIRST, cpu_rootconf, NULL)
 288
 289 u_long  bootdev = 0;            /* not a cdev_t - encoding is different */
 290
 291 #if defined(FFS) && defined(FFS_ROOT)
 292
 293 /*
 294  * The boot code uses old block device major numbers to pass bootdev to
 295  * us.  We have to translate these to character device majors because
 296  * we don't have block devices any more.
 297  */
 298 static int
 299 boot_translate_majdev(int bmajor)
 300 {
 301         static int conv[] = { BOOTMAJOR_CONVARY };
 302
 303         if (bmajor >= 0 && bmajor < sizeof(conv)/sizeof(conv[0]))
 304                 return(conv[bmajor]);
 305         return(-1);
 306 }
 307
 308 /*
 309  * Attempt to find the device from which we were booted.
 310  * If we can do so, and not instructed not to do so,
 311  * set rootdevs[] and rootdevnames[] to correspond to the
 312  * boot device(s).
 313  *
 314  * This code survives in order to allow the system to be
 315  * booted from legacy environments that do not correctly
 316  * populate the kernel environment. There are significant
 317  * restrictions on the bootability of the system in this
 318  * situation; it can only be mounting root from a 'da'
 319  * 'wd' or 'fd' device, and the root filesystem must be ufs.
 320  */
 321 static void
 322 setroot(void)
 323 {
 324         int majdev, mindev, unit, slice, part;
 325         cdev_t newrootdev, dev;
 326         char partname[2];
 327         char *sname;
 328
 329         if ((bootdev & B_MAGICMASK) != B_DEVMAGIC) {
 330                 kprintf("no B_DEVMAGIC (bootdev=%#lx)\n", bootdev);
 331                 return;
 332         }
 333         majdev = boot_translate_majdev(B_TYPE(bootdev));
 334         if (bootverbose) {
 335                 kprintf("bootdev: %08lx type=%ld unit=%ld "
 336                         "slice=%ld part=%ld major=%d\n",
 337                         bootdev, B_TYPE(bootdev), B_UNIT(bootdev),
 338                         B_SLICE(bootdev), B_PARTITION(bootdev), majdev);
 339         }
 340         dev = udev2dev(makeudev(majdev, 0), 0);
 341         if (!dev_is_good(dev))
 342                 return;
 343         unit = B_UNIT(bootdev);
 344         slice = B_SLICE(bootdev);
 345         if (slice == WHOLE_DISK_SLICE)
 346                 slice = COMPATIBILITY_SLICE;
 347         if (slice < 0 || slice >= MAX_SLICES) {
 348                 kprintf("bad slice\n");
 349                 return;
 350         }
 351
 352         part = B_PARTITION(bootdev);
 353         mindev = dkmakeminor(unit, slice, part);
 354         newrootdev = udev2dev(makeudev(majdev, mindev), 0);
 355         if (!dev_is_good(newrootdev))
 356                 return;
 357         sname = dsname(newrootdev, unit, slice, part, partname);
 358         rootdevnames[0] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 359         ksprintf(rootdevnames[0], "ufs:%s%s", sname, partname);
 360
 361         /*
 362          * For properly dangerously dedicated disks (ones with a historical
 363          * bogus partition table), the boot blocks will give slice = 4, but
 364          * the kernel will only provide the compatibility slice since it
 365          * knows that slice 4 is not a real slice.  Arrange to try mounting
 366          * the compatibility slice as root if mounting the slice passed by
 367          * the boot blocks fails.  This handles the dangerously dedicated
 368          * case and perhaps others.
 369          */
 370         if (slice == COMPATIBILITY_SLICE)
 371                 return;
 372         slice = COMPATIBILITY_SLICE;
 373         sname = dsname(newrootdev, unit, slice, part, partname);
 374         rootdevnames[1] = kmalloc(strlen(sname) + 6, M_DEVBUF, M_WAITOK);
 375         ksprintf(rootdevnames[1], "ufs:%s%s", sname, partname);
 376 }
 377 #endif
 378
 379 #if defined(NFS) && defined(NFS_ROOT)
 380 #if !defined(BOOTP_NFSROOT)
 381
 382 #include <sys/socket.h>
 383 #include <net/if.h>
 384 #include <net/if_dl.h>
 385 #include <net/if_types.h>
 386 #include <net/if_var.h>
 387 #include <net/ethernet.h>
 388 #include <netinet/in.h>
 389 #include <vfs/nfs/rpcv2.h>
 390 #include <vfs/nfs/nfsproto.h>
 391 #include <vfs/nfs/nfs.h>
 392 #include <vfs/nfs/nfsdiskless.h>
 393
 394 extern struct nfs_diskless      nfs_diskless;
 395
 396 /*
 397  * Convert a kenv variable to a sockaddr.  If the kenv variable does not
 398  * exist the sockaddr will remain zerod out (callers typically just check
 399  * sin_len).  A network address of 0.0.0.0 is equivalent to failure.
 400  */
 401 static int
 402 inaddr_to_sockaddr(char *ev, struct sockaddr_in *sa)
 403 {
 404         u_int32_t       a[4];
 405         char            *cp;
 406
 407         bzero(sa, sizeof(*sa));
 408
 409         if ((cp = kgetenv(ev)) == NULL)
 410                 return(1);
 411         if (ksscanf(cp, "%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3]) != 4)
 412                 return(1);
 413         if (a[0] == 0 && a[1] == 0 && a[2] == 0 && a[3] == 0)
 414                 return(1);
 415         /* XXX is this ordering correct? */
 416         sa->sin_addr.s_addr = (a[3] << 24) + (a[2] << 16) + (a[1] << 8) + a[0];
 417         sa->sin_len = sizeof(*sa);
 418         sa->sin_family = AF_INET;
 419         return(0);
 420 }
 421
 422 static int
 423 hwaddr_to_sockaddr(char *ev, struct sockaddr_dl *sa)
 424 {
 425         char            *cp;
 426         u_int32_t       a[6];
 427
 428         bzero(sa, sizeof(*sa));
 429         sa->sdl_len = sizeof(*sa);
 430         sa->sdl_family = AF_LINK;
 431         sa->sdl_type = IFT_ETHER;
 432         sa->sdl_alen = ETHER_ADDR_LEN;
 433         if ((cp = kgetenv(ev)) == NULL)
 434                 return(1);
 435         if (ksscanf(cp, "%x:%x:%x:%x:%x:%x", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5]) != 6)
 436                 return(1);
 437         sa->sdl_data[0] = a[0];
 438         sa->sdl_data[1] = a[1];
 439         sa->sdl_data[2] = a[2];
 440         sa->sdl_data[3] = a[3];
 441         sa->sdl_data[4] = a[4];
 442         sa->sdl_data[5] = a[5];
 443         return(0);
 444 }
 445
 446 static int
 447 decode_nfshandle(char *ev, u_char *fh)
 448 {
 449         u_char  *cp;
 450         int     len, val;
 451
 452         if (((cp = kgetenv(ev)) == NULL) || (strlen(cp) < 2) || (*cp != 'X'))
 453                 return(0);
 454         len = 0;
 455         cp++;
 456         for (;;) {
 457                 if (*cp == 'X')
 458                         return(len);
 459                 if ((ksscanf(cp, "%2x", &val) != 1) || (val > 0xff))
 460                         return(0);
 461                 *(fh++) = val;
 462                 len++;
 463                 cp += 2;
 464                 if (len > NFSX_V2FH)
 465                     return(0);
 466         }
 467 }
 468
 469 /*
 470  * Populate the essential fields in the nfsv3_diskless structure.
 471  *
 472  * The loader is expected to export the following environment variables:
 473  *
 474  * boot.netif.ip                IP address on boot interface
 475  * boot.netif.netmask           netmask on boot interface
 476  * boot.netif.gateway           default gateway (optional)
 477  * boot.netif.hwaddr            hardware address of boot interface
 478  * boot.nfsroot.server          IP address of root filesystem server
 479  * boot.nfsroot.path            path of the root filesystem on server
 480  * boot.nfsroot.nfshandle       NFS handle for root filesystem on server
 481  */
 482 static void
 483 pxe_setup_nfsdiskless(void)
 484 {
 485         struct nfs_diskless     *nd = &nfs_diskless;
 486         struct ifnet            *ifp;
 487         struct ifaddr           *ifa;
 488         struct sockaddr_dl      *sdl, ourdl;
 489         struct sockaddr_in      myaddr, netmask;
 490         char                    *cp;
 491
 492         /* set up interface */
 493         if (inaddr_to_sockaddr("boot.netif.ip", &myaddr))
 494                 return;
 495         if (inaddr_to_sockaddr("boot.netif.netmask", &netmask)) {
 496                 kprintf("PXE: no netmask\n");
 497                 return;
 498         }
 499         bcopy(&myaddr, &nd->myif.ifra_addr, sizeof(myaddr));
 500         bcopy(&myaddr, &nd->myif.ifra_broadaddr, sizeof(myaddr));
 501         ((struct sockaddr_in *) &nd->myif.ifra_broadaddr)->sin_addr.s_addr =
 502                 myaddr.sin_addr.s_addr | ~ netmask.sin_addr.s_addr;
 503         bcopy(&netmask, &nd->myif.ifra_mask, sizeof(netmask));
 504
 505         if (hwaddr_to_sockaddr("boot.netif.hwaddr", &ourdl)) {
 506                 kprintf("PXE: no hardware address\n");
 507                 return;
 508         }
 509         ifa = NULL;
 510         ifp = TAILQ_FIRST(&ifnet);
 511         TAILQ_FOREACH(ifp, &ifnet, if_link) {
 512                 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
 513                         if ((ifa->ifa_addr->sa_family == AF_LINK) &&
 514                             (sdl = ((struct sockaddr_dl *)ifa->ifa_addr))) {
 515                                 if ((sdl->sdl_type == ourdl.sdl_type) &&
 516                                     (sdl->sdl_alen == ourdl.sdl_alen) &&
 517                                     !bcmp(sdl->sdl_data + sdl->sdl_nlen,
 518                                           ourdl.sdl_data + ourdl.sdl_nlen,
 519                                           sdl->sdl_alen))
 520                                     goto match_done;
 521                         }
 522                 }
 523         }
 524         kprintf("PXE: no interface\n");
 525         return; /* no matching interface */
 526 match_done:
 527         strlcpy(nd->myif.ifra_name, ifp->if_xname, sizeof(nd->myif.ifra_name));
 528
 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_DGRAM;
 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