sys/kern/init_main.c

   1 /*
   2  * Copyright (c) 1995 Terrence R. Lambert
   3  * All rights reserved.
   4  *
   5  * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  * (c) UNIX System Laboratories, Inc.
   8  * All or some portions of this file are derived from material licensed
   9  * to the University of California by American Telephone and Telegraph
  10  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  11  * the permission of UNIX System Laboratories, Inc.
  12  *
  13  * Redistribution and use in source and binary forms, with or without
  14  * modification, are permitted provided that the following conditions
  15  * are met:
  16  * 1. Redistributions of source code must retain the above copyright
  17  *    notice, this list of conditions and the following disclaimer.
  18  * 2. Redistributions in binary form must reproduce the above copyright
  19  *    notice, this list of conditions and the following disclaimer in the
  20  *    documentation and/or other materials provided with the distribution.
  21  * 3. All advertising materials mentioning features or use of this software
  22  *    must display the following acknowledgement:
  23  *      This product includes software developed by the University of
  24  *      California, Berkeley and its contributors.
  25  * 4. Neither the name of the University nor the names of its contributors
  26  *    may be used to endorse or promote products derived from this software
  27  *    without specific prior written permission.
  28  *
  29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  39  * SUCH DAMAGE.
  40  *
  41  *      @(#)init_main.c 8.9 (Berkeley) 1/21/94
  42  * $FreeBSD: src/sys/kern/init_main.c,v 1.134.2.8 2003/06/06 20:21:32 tegge Exp $
  43  * $DragonFly: src/sys/kern/init_main.c,v 1.87 2008/06/07 11:37:23 mneumann Exp $
  44  */
  45
  46 #include "opt_init_path.h"
  47
  48 #include <sys/param.h>
  49 #include <sys/file.h>
  50 #include <sys/filedesc.h>
  51 #include <sys/kernel.h>
  52 #include <sys/mount.h>
  53 #include <sys/sysctl.h>
  54 #include <sys/proc.h>
  55 #include <sys/resourcevar.h>
  56 #include <sys/signalvar.h>
  57 #include <sys/systm.h>
  58 #include <sys/vnode.h>
  59 #include <sys/sysent.h>
  60 #include <sys/reboot.h>
  61 #include <sys/sysproto.h>
  62 #include <sys/vmmeter.h>
  63 #include <sys/unistd.h>
  64 #include <sys/malloc.h>
  65 #include <sys/machintr.h>
  66 #include <sys/file2.h>
  67 #include <sys/thread2.h>
  68 #include <sys/sysref2.h>
  69 #include <sys/spinlock2.h>
  70
  71 #include <machine/cpu.h>
  72
  73 #include <vm/vm.h>
  74 #include <vm/vm_param.h>
  75 #include <sys/lock.h>
  76 #include <vm/pmap.h>
  77 #include <vm/vm_map.h>
  78 #include <vm/vm_extern.h>
  79 #include <sys/user.h>
  80 #include <sys/copyright.h>
  81
  82 /* Components of the first process -- never freed. */
  83 static struct session session0;
  84 static struct pgrp pgrp0;
  85 static struct sigacts sigacts0;
  86 static struct filedesc filedesc0;
  87 static struct plimit limit0;
  88 static struct vmspace vmspace0;
  89 struct proc *initproc;
  90 struct proc proc0;
  91 struct lwp lwp0;
  92 struct thread thread0;
  93
  94 int cmask = CMASK;
  95 extern  struct user *proc0paddr;
  96 extern int fallback_elf_brand;
  97
  98 int     boothowto = 0;          /* initialized so that it can be patched */
  99 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
 100
 101 /*
 102  * This ensures that there is at least one entry so that the sysinit_set
 103  * symbol is not undefined.  A subsystem ID of SI_SPECIAL_DUMMY is never
 104  * executed.
 105  */
 106 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL)
 107
 108 /*
 109  * The sysinit table itself.  Items are checked off as the are run.
 110  * If we want to register new sysinit types, add them to newsysinit.
 111  */
 112 SET_DECLARE(sysinit_set, struct sysinit);
 113 struct sysinit **sysinit, **sysinit_end;
 114 struct sysinit **newsysinit, **newsysinit_end;
 115
 116
 117 /*
 118  * Merge a new sysinit set into the current set, reallocating it if
 119  * necessary.  This can only be called after malloc is running.
 120  */
 121 void
 122 sysinit_add(struct sysinit **set, struct sysinit **set_end)
 123 {
 124         struct sysinit **newset;
 125         struct sysinit **sipp;
 126         struct sysinit **xipp;
 127         int count;
 128
 129         count = set_end - set;
 130         if (newsysinit)
 131                 count += newsysinit_end - newsysinit;
 132         else
 133                 count += sysinit_end - sysinit;
 134         newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK);
 135         xipp = newset;
 136         if (newsysinit) {
 137                 for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
 138                         *xipp++ = *sipp;
 139         } else {
 140                 for (sipp = sysinit; sipp < sysinit_end; sipp++)
 141                         *xipp++ = *sipp;
 142         }
 143         for (sipp = set; sipp < set_end; sipp++)
 144                 *xipp++ = *sipp;
 145         if (newsysinit)
 146                 kfree(newsysinit, M_TEMP);
 147         newsysinit = newset;
 148         newsysinit_end = newset + count;
 149 }
 150
 151 /*
 152  * Callbacks from machine-dependant startup code (e.g. init386) to set
 153  * up low level entities related to cpu #0's globaldata.
 154  *
 155  * Called from very low level boot code.
 156  */
 157 void
 158 mi_proc0init(struct globaldata *gd, struct user *proc0paddr)
 159 {
 160         lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd);
 161         lwkt_set_comm(&thread0, "thread0");
 162         RB_INIT(&proc0.p_lwp_tree);
 163         spin_init(&proc0.p_spin);
 164         proc0.p_lasttid = 0;    /* +1 = next TID */
 165         lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0);
 166         lwp0.lwp_thread = &thread0;
 167         lwp0.lwp_proc = &proc0;
 168         proc0.p_usched = usched_init();
 169         lwp0.lwp_cpumask = 0xFFFFFFFF;
 170         varsymset_init(&proc0.p_varsymset, NULL);
 171         thread0.td_flags |= TDF_RUNNING;
 172         thread0.td_proc = &proc0;
 173         thread0.td_lwp = &lwp0;
 174         thread0.td_switch = cpu_heavy_switch;   /* YYY eventually LWKT */
 175         lwkt_schedule_self(curthread);
 176 }
 177
 178 /*
 179  * System startup; initialize the world, create process 0, mount root
 180  * filesystem, and fork to create init and pagedaemon.  Most of the
 181  * hard work is done in the lower-level initialization routines including
 182  * startup(), which does memory initialization and autoconfiguration.
 183  *
 184  * This allows simple addition of new kernel subsystems that require
 185  * boot time initialization.  It also allows substitution of subsystem
 186  * (for instance, a scheduler, kernel profiler, or VM system) by object
 187  * module.  Finally, it allows for optional "kernel threads".
 188  */
 189 void
 190 mi_startup(void)
 191 {
 192         struct sysinit *sip;            /* system initialization*/
 193         struct sysinit **sipp;          /* system initialization*/
 194         struct sysinit **xipp;          /* interior loop of sort*/
 195         struct sysinit *save;           /* bubble*/
 196
 197         if (sysinit == NULL) {
 198                 sysinit = SET_BEGIN(sysinit_set);
 199                 sysinit_end = SET_LIMIT(sysinit_set);
 200         }
 201
 202 restart:
 203         /*
 204          * Perform a bubble sort of the system initialization objects by
 205          * their subsystem (primary key) and order (secondary key).
 206          */
 207         for (sipp = sysinit; sipp < sysinit_end; sipp++) {
 208                 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
 209                         if ((*sipp)->subsystem < (*xipp)->subsystem ||
 210                              ((*sipp)->subsystem == (*xipp)->subsystem &&
 211                               (*sipp)->order <= (*xipp)->order))
 212                                 continue;       /* skip*/
 213                         save = *sipp;
 214                         *sipp = *xipp;
 215                         *xipp = save;
 216                 }
 217         }
 218
 219         /*
 220          * Traverse the (now) ordered list of system initialization tasks.
 221          * Perform each task, and continue on to the next task.
 222          *
 223          * The last item on the list is expected to be the scheduler,
 224          * which will not return.
 225          */
 226         for (sipp = sysinit; sipp < sysinit_end; sipp++) {
 227                 sip = *sipp;
 228                 if (sip->subsystem == SI_SPECIAL_DUMMY)
 229                         continue;       /* skip dummy task(s)*/
 230
 231                 if (sip->subsystem == SI_SPECIAL_DONE)
 232                         continue;
 233
 234                 /* Call function */
 235                 (*(sip->func))(sip->udata);
 236
 237                 /* Check off the one we're just done */
 238                 sip->subsystem = SI_SPECIAL_DONE;
 239
 240                 /* Check if we've installed more sysinit items via KLD */
 241                 if (newsysinit != NULL) {
 242                         if (sysinit != SET_BEGIN(sysinit_set))
 243                                 kfree(sysinit, M_TEMP);
 244                         sysinit = newsysinit;
 245                         sysinit_end = newsysinit_end;
 246                         newsysinit = NULL;
 247                         newsysinit_end = NULL;
 248                         goto restart;
 249                 }
 250         }
 251
 252         panic("Shouldn't get here!");
 253         /* NOTREACHED*/
 254 }
 255
 256
 257 /*
 258  ***************************************************************************
 259  ****
 260  **** The following SYSINIT's belong elsewhere, but have not yet
 261  **** been moved.
 262  ****
 263  ***************************************************************************
 264  */
 265 static void
 266 print_caddr_t(void *data __unused)
 267 {
 268         kprintf("%s", (char *)data);
 269 }
 270 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
 271
 272 /*
 273  * Leave the critical section that protected us from spurious interrupts
 274  * so device probes work.
 275  */
 276 static void
 277 leavecrit(void *dummy __unused)
 278 {
 279         MachIntrABI.finalize();
 280         cpu_enable_intr();
 281         MachIntrABI.cleanup();
 282         crit_exit();
 283         KKASSERT(!IN_CRITICAL_SECT(curthread));
 284
 285         if (bootverbose)
 286                 kprintf("Leaving critical section, allowing interrupts\n");
 287 }
 288 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL)
 289
 290 /*
 291  * This is called after the threading system is up and running,
 292  * including the softclock, clock interrupts, and SMP.
 293  */
 294 static void
 295 tsleepworks(void *dummy __unused)
 296 {
 297         tsleep_now_works = 1;
 298 }
 299 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL)
 300
 301 /*
 302  * This is called after devices have configured.  Tell the kernel we are
 303  * no longer in cold boot.
 304  */
 305 static void
 306 endofcoldboot(void *dummy __unused)
 307 {
 308         cold = 0;
 309 }
 310 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL)
 311
 312 /*
 313  ***************************************************************************
 314  ****
 315  **** The two following SYSINT's are proc0 specific glue code.  I am not
 316  **** convinced that they can not be safely combined, but their order of
 317  **** operation has been maintained as the same as the original init_main.c
 318  **** for right now.
 319  ****
 320  **** These probably belong in init_proc.c or kern_proc.c, since they
 321  **** deal with proc0 (the fork template process).
 322  ****
 323  ***************************************************************************
 324  */
 325 /* ARGSUSED*/
 326 static void
 327 proc0_init(void *dummy __unused)
 328 {
 329         struct proc *p;
 330         struct lwp *lp;
 331
 332         p = &proc0;
 333         lp = &lwp0;
 334
 335         /*
 336          * Initialize process and pgrp structures.
 337          */
 338         procinit();
 339
 340         /*
 341          * additional VM structures
 342          */
 343         vm_init2();
 344
 345         /*
 346          * Create process 0 (the swapper).
 347          */
 348         LIST_INSERT_HEAD(&allproc, p, p_list);
 349         p->p_pgrp = &pgrp0;
 350         LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
 351         LIST_INIT(&pgrp0.pg_members);
 352         LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
 353
 354         pgrp0.pg_session = &session0;
 355         session0.s_count = 1;
 356         session0.s_leader = p;
 357
 358         p->p_sysent = &aout_sysvec;
 359
 360         p->p_flag = P_SYSTEM;
 361         p->p_stat = SACTIVE;
 362         lp->lwp_stat = LSRUN;
 363         p->p_nice = NZERO;
 364         p->p_rtprio.type = RTP_PRIO_NORMAL;
 365         p->p_rtprio.prio = 0;
 366         lp->lwp_rtprio = p->p_rtprio;
 367
 368         p->p_peers = 0;
 369         p->p_leader = p;
 370
 371         bcopy("swapper", p->p_comm, sizeof ("swapper"));
 372         bcopy("swapper", thread0.td_comm, sizeof ("swapper"));
 373
 374         /* Create credentials. */
 375         p->p_ucred = crget();
 376         p->p_ucred->cr_ruidinfo = uifind(0);
 377         p->p_ucred->cr_ngroups = 1;     /* group 0 */
 378         p->p_ucred->cr_uidinfo = uifind(0);
 379
 380         /* Don't jail it */
 381         p->p_ucred->cr_prison = NULL;
 382
 383         /* Create sigacts. */
 384         p->p_sigacts = &sigacts0;
 385         p->p_sigacts->ps_refcnt = 1;
 386
 387         /* Initialize signal state for process 0. */
 388         siginit(p);
 389
 390         /* Create the file descriptor table. */
 391         fdinit_bootstrap(p, &filedesc0, cmask);
 392
 393         /* Create the limits structures. */
 394         plimit_init0(&limit0);
 395         p->p_limit = &limit0;
 396
 397         /* Allocate a prototype map so we have something to fork. */
 398         pmap_pinit0(vmspace_pmap(&vmspace0));
 399         p->p_vmspace = &vmspace0;
 400         lp->lwp_vmspace = p->p_vmspace;
 401         sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class);
 402         vm_map_init(&vmspace0.vm_map,
 403                     round_page(VM_MIN_USER_ADDRESS),
 404                     trunc_page(VM_MAX_USER_ADDRESS),
 405                     vmspace_pmap(&vmspace0));
 406         sysref_activate(&vmspace0.vm_sysref);
 407
 408         /*
 409          * Charge root for one process.
 410          */
 411         (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
 412         vm_init_limits(p);
 413 }
 414 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL)
 415
 416 static int proc0_post_callback(struct proc *p, void *data __unused);
 417
 418 /* ARGSUSED*/
 419 static void
 420 proc0_post(void *dummy __unused)
 421 {
 422         struct timespec ts;
 423
 424         /*
 425          * Now we can look at the time, having had a chance to verify the
 426          * time from the file system.  Pretend that proc0 started now.
 427          */
 428         allproc_scan(proc0_post_callback, NULL);
 429
 430         /*
 431          * Give the ``random'' number generator a thump.
 432          * XXX: Does read_random() contain enough bits to be used here ?
 433          */
 434         nanotime(&ts);
 435         skrandom(ts.tv_sec ^ ts.tv_nsec);
 436 }
 437
 438 static int
 439 proc0_post_callback(struct proc *p, void *data __unused)
 440 {
 441         microtime(&p->p_start);
 442         return(0);
 443 }
 444
 445 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL)
 446
 447 /*
 448  ***************************************************************************
 449  ****
 450  **** The following SYSINIT's and glue code should be moved to the
 451  **** respective files on a per subsystem basis.
 452  ****
 453  ***************************************************************************
 454  */
 455
 456
 457 /*
 458  ***************************************************************************
 459  ****
 460  **** The following code probably belongs in another file, like
 461  **** kern/init_init.c.
 462  ****
 463  ***************************************************************************
 464  */
 465
 466 /*
 467  * List of paths to try when searching for "init".
 468  */
 469 static char init_path[MAXPATHLEN] =
 470 #ifdef  INIT_PATH
 471     __XSTRING(INIT_PATH);
 472 #else
 473     "/sbin/init:/sbin/oinit:/sbin/init.bak";
 474 #endif
 475 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
 476
 477 /*
 478  * Start the initial user process; try exec'ing each pathname in init_path.
 479  * The program is invoked with one argument containing the boot flags.
 480  *
 481  * The MP lock is held on entry.
 482  */
 483 static void
 484 start_init(void *dummy, struct trapframe *frame)
 485 {
 486         vm_offset_t addr;
 487         struct execve_args args;
 488         int options, error;
 489         char *var, *path, *next, *s;
 490         char *ucp, **uap, *arg0, *arg1;
 491         struct proc *p;
 492         struct lwp *lp;
 493         struct mount *mp;
 494         struct vnode *vp;
 495
 496         p = curproc;
 497
 498         lp = ONLY_LWP_IN_PROC(p);
 499
 500         /* Get the vnode for '/'.  Set p->p_fd->fd_cdir to reference it. */
 501         mp = mountlist_boot_getfirst();
 502         if (VFS_ROOT(mp, &vp))
 503                 panic("cannot find root vnode");
 504         if (mp->mnt_ncmountpt.ncp == NULL) {
 505                 cache_allocroot(&mp->mnt_ncmountpt, mp, vp);
 506                 cache_unlock(&mp->mnt_ncmountpt);       /* leave ref intact */
 507         }
 508         p->p_fd->fd_cdir = vp;
 509         vref(p->p_fd->fd_cdir);
 510         p->p_fd->fd_rdir = vp;
 511         vref(p->p_fd->fd_rdir);
 512         vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt));
 513         vn_unlock(vp);                  /* leave ref intact */
 514         cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir);
 515         cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir);
 516
 517         /*
 518          * Need just enough stack to hold the faked-up "execve()" arguments.
 519          */
 520         addr = trunc_page(USRSTACK - PAGE_SIZE);
 521         error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
 522                             FALSE,
 523                             VM_MAPTYPE_NORMAL,
 524                             VM_PROT_ALL, VM_PROT_ALL,
 525                             0);
 526         if (error)
 527                 panic("init: couldn't allocate argument space");
 528         p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
 529         p->p_vmspace->vm_ssize = 1;
 530
 531         if ((var = kgetenv("init_path")) != NULL) {
 532                 strncpy(init_path, var, sizeof init_path);
 533                 init_path[sizeof init_path - 1] = 0;
 534         }
 535         if ((var = kgetenv("kern.fallback_elf_brand")) != NULL)
 536                 fallback_elf_brand = strtol(var, NULL, 0);
 537
 538         for (path = init_path; *path != '\0'; path = next) {
 539                 while (*path == ':')
 540                         path++;
 541                 if (*path == '\0')
 542                         break;
 543                 for (next = path; *next != '\0' && *next != ':'; next++)
 544                         /* nothing */ ;
 545                 if (bootverbose)
 546                         kprintf("start_init: trying %.*s\n", (int)(next - path),
 547                             path);
 548
 549                 /*
 550                  * Move out the boot flag argument.
 551                  */
 552                 options = 0;
 553                 ucp = (char *)USRSTACK;
 554                 (void)subyte(--ucp, 0);         /* trailing zero */
 555                 if (boothowto & RB_SINGLE) {
 556                         (void)subyte(--ucp, 's');
 557                         options = 1;
 558                 }
 559 #ifdef notyet
 560                 if (boothowto & RB_FASTBOOT) {
 561                         (void)subyte(--ucp, 'f');
 562                         options = 1;
 563                 }
 564 #endif
 565
 566 #ifdef BOOTCDROM
 567                 (void)subyte(--ucp, 'C');
 568                 options = 1;
 569 #endif
 570                 if (options == 0)
 571                         (void)subyte(--ucp, '-');
 572                 (void)subyte(--ucp, '-');               /* leading hyphen */
 573                 arg1 = ucp;
 574
 575                 /*
 576                  * Move out the file name (also arg 0).
 577                  */
 578                 (void)subyte(--ucp, 0);
 579                 for (s = next - 1; s >= path; s--)
 580                         (void)subyte(--ucp, *s);
 581                 arg0 = ucp;
 582
 583                 /*
 584                  * Move out the arg pointers.
 585                  */
 586                 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
 587                 (void)suword((caddr_t)--uap, (long)0);  /* terminator */
 588                 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
 589                 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
 590
 591                 /*
 592                  * Point at the arguments.
 593                  */
 594                 args.fname = arg0;
 595                 args.argv = uap;
 596                 args.envv = NULL;
 597
 598                 /*
 599                  * Now try to exec the program.  If can't for any reason
 600                  * other than it doesn't exist, complain.
 601                  *
 602                  * Otherwise, return via fork_trampoline() all the way
 603                  * to user mode as init!
 604                  *
 605                  * WARNING!  We may have been moved to another cpu after
 606                  * acquiring the current user process designation.  The
 607                  * MP lock will migrate with us though so we still have to
 608                  * release it.
 609                  */
 610                 if ((error = sys_execve(&args)) == 0) {
 611                         rel_mplock();
 612                         lp->lwp_proc->p_usched->acquire_curproc(lp);
 613                         return;
 614                 }
 615                 if (error != ENOENT)
 616                         kprintf("exec %.*s: error %d\n", (int)(next - path),
 617                             path, error);
 618         }
 619         kprintf("init: not found in path %s\n", init_path);
 620         panic("no init");
 621 }
 622
 623 /*
 624  * Like kthread_create(), but runs in it's own address space.
 625  * We do this early to reserve pid 1.
 626  *
 627  * Note special case - do not make it runnable yet.  Other work
 628  * in progress will change this more.
 629  */
 630 static void
 631 create_init(const void *udata __unused)
 632 {
 633         int error;
 634         struct lwp *lp;
 635
 636         crit_enter();
 637         error = fork1(&lwp0, RFFDG | RFPROC, &initproc);
 638         if (error)
 639                 panic("cannot fork init: %d", error);
 640         initproc->p_flag |= P_SYSTEM;
 641         lp = ONLY_LWP_IN_PROC(initproc);
 642         cpu_set_fork_handler(lp, start_init, NULL);
 643         crit_exit();
 644 }
 645 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
 646
 647 /*
 648  * Make it runnable now.
 649  */
 650 static void
 651 kick_init(const void *udata __unused)
 652 {
 653         start_forked_proc(&lwp0, initproc);
 654 }
 655 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
 656
 657 /*
 658  * Machine independant globaldata initialization
 659  *
 660  * WARNING!  Called from early boot, 'mycpu' may not work yet.
 661  */
 662 void
 663 mi_gdinit(struct globaldata *gd, int cpuid)
 664 {
 665         TAILQ_INIT(&gd->gd_systimerq);
 666         gd->gd_sysid_alloc = cpuid;     /* prime low bits for cpu lookup */
 667         gd->gd_cpuid = cpuid;
 668         gd->gd_cpumask = (cpumask_t)1 << cpuid;
 669         lwkt_gdinit(gd);
 670         vm_map_entry_reserve_cpu_init(gd);
 671         sleep_gdinit(gd);
 672 }
 673