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 67 #include <sys/file2.h> 68 #include <sys/thread2.h> 69 #include <sys/sysref2.h> 70 #include <sys/spinlock2.h> 71 #include <sys/mplock2.h> 72 73 #include <machine/cpu.h> 74 75 #include <vm/vm.h> 76 #include <vm/vm_param.h> 77 #include <sys/lock.h> 78 #include <vm/pmap.h> 79 #include <vm/vm_map.h> 80 #include <vm/vm_extern.h> 81 #include <sys/user.h> 82 #include <sys/copyright.h> 83 84 int vfs_mountroot_devfs(void); 85 86 /* Components of the first process -- never freed. */ 87 static struct session session0; 88 static struct pgrp pgrp0; 89 static struct sigacts sigacts0; 90 static struct filedesc filedesc0; 91 static struct plimit limit0; 92 static struct vmspace vmspace0; 93 struct proc *initproc; 94 struct proc proc0; 95 struct lwp lwp0; 96 struct thread thread0; 97 98 int cmask = CMASK; 99 u_int cpu_mi_feature; 100 extern struct user *proc0paddr; 101 extern int fallback_elf_brand; 102 103 int boothowto = 0; /* initialized so that it can be patched */ 104 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 105 "Reboot flags, from console subsystem"); 106 107 /* 108 * This ensures that there is at least one entry so that the sysinit_set 109 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 110 * executed. 111 */ 112 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL) 113 114 /* 115 * The sysinit table itself. Items are checked off as the are run. 116 * If we want to register new sysinit types, add them to newsysinit. 117 */ 118 SET_DECLARE(sysinit_set, struct sysinit); 119 struct sysinit **sysinit, **sysinit_end; 120 struct sysinit **newsysinit, **newsysinit_end; 121 122 123 /* 124 * Merge a new sysinit set into the current set, reallocating it if 125 * necessary. This can only be called after malloc is running. 126 */ 127 void 128 sysinit_add(struct sysinit **set, struct sysinit **set_end) 129 { 130 struct sysinit **newset; 131 struct sysinit **sipp; 132 struct sysinit **xipp; 133 int count; 134 135 count = set_end - set; 136 if (newsysinit) 137 count += newsysinit_end - newsysinit; 138 else 139 count += sysinit_end - sysinit; 140 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 141 xipp = newset; 142 if (newsysinit) { 143 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 144 *xipp++ = *sipp; 145 } else { 146 for (sipp = sysinit; sipp < sysinit_end; sipp++) 147 *xipp++ = *sipp; 148 } 149 for (sipp = set; sipp < set_end; sipp++) 150 *xipp++ = *sipp; 151 if (newsysinit) 152 kfree(newsysinit, M_TEMP); 153 newsysinit = newset; 154 newsysinit_end = newset + count; 155 } 156 157 /* 158 * Callbacks from machine-dependant startup code (e.g. init386) to set 159 * up low level entities related to cpu #0's globaldata. 160 * 161 * Called from very low level boot code. 162 */ 163 void 164 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 165 { 166 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 167 lwkt_set_comm(&thread0, "thread0"); 168 RB_INIT(&proc0.p_lwp_tree); 169 spin_init(&proc0.p_spin); 170 proc0.p_lasttid = 0; /* +1 = next TID */ 171 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 172 lwp0.lwp_thread = &thread0; 173 lwp0.lwp_proc = &proc0; 174 proc0.p_usched = usched_init(); 175 lwp0.lwp_cpumask = (cpumask_t)-1; 176 varsymset_init(&proc0.p_varsymset, NULL); 177 thread0.td_flags |= TDF_RUNNING; 178 thread0.td_proc = &proc0; 179 thread0.td_lwp = &lwp0; 180 thread0.td_switch = cpu_lwkt_switch; 181 lwkt_schedule_self(curthread); 182 } 183 184 /* 185 * System startup; initialize the world, create process 0, mount root 186 * filesystem, and fork to create init and pagedaemon. Most of the 187 * hard work is done in the lower-level initialization routines including 188 * startup(), which does memory initialization and autoconfiguration. 189 * 190 * This allows simple addition of new kernel subsystems that require 191 * boot time initialization. It also allows substitution of subsystem 192 * (for instance, a scheduler, kernel profiler, or VM system) by object 193 * module. Finally, it allows for optional "kernel threads". 194 */ 195 void 196 mi_startup(void) 197 { 198 struct sysinit *sip; /* system initialization*/ 199 struct sysinit **sipp; /* system initialization*/ 200 struct sysinit **xipp; /* interior loop of sort*/ 201 struct sysinit *save; /* bubble*/ 202 203 if (sysinit == NULL) { 204 sysinit = SET_BEGIN(sysinit_set); 205 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 206 /* 207 * XXX For whatever reason, on 64-bit vkernels 208 * the value of sysinit obtained from the 209 * linker set is wrong. 210 */ 211 if ((long)sysinit % 8 != 0) { 212 kprintf("Fixing sysinit value...\n"); 213 sysinit = (long)sysinit + 4; 214 } 215 #endif 216 sysinit_end = SET_LIMIT(sysinit_set); 217 } 218 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 219 KKASSERT((long)sysinit % 8 == 0); 220 #endif 221 222 restart: 223 /* 224 * Perform a bubble sort of the system initialization objects by 225 * their subsystem (primary key) and order (secondary key). 226 */ 227 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 228 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 229 if ((*sipp)->subsystem < (*xipp)->subsystem || 230 ((*sipp)->subsystem == (*xipp)->subsystem && 231 (*sipp)->order <= (*xipp)->order)) 232 continue; /* skip*/ 233 save = *sipp; 234 *sipp = *xipp; 235 *xipp = save; 236 } 237 } 238 239 /* 240 * Traverse the (now) ordered list of system initialization tasks. 241 * Perform each task, and continue on to the next task. 242 * 243 * The last item on the list is expected to be the scheduler, 244 * which will not return. 245 */ 246 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 247 sip = *sipp; 248 if (sip->subsystem == SI_SPECIAL_DUMMY) 249 continue; /* skip dummy task(s)*/ 250 251 if (sip->subsystem == SI_SPECIAL_DONE) 252 continue; 253 254 /* Call function */ 255 (*(sip->func))(sip->udata); 256 257 /* Check off the one we're just done */ 258 sip->subsystem = SI_SPECIAL_DONE; 259 260 /* Check if we've installed more sysinit items via KLD */ 261 if (newsysinit != NULL) { 262 if (sysinit != SET_BEGIN(sysinit_set)) 263 kfree(sysinit, M_TEMP); 264 sysinit = newsysinit; 265 sysinit_end = newsysinit_end; 266 newsysinit = NULL; 267 newsysinit_end = NULL; 268 goto restart; 269 } 270 } 271 272 panic("Shouldn't get here!"); 273 /* NOTREACHED*/ 274 } 275 276 277 /* 278 *************************************************************************** 279 **** 280 **** The following SYSINIT's belong elsewhere, but have not yet 281 **** been moved. 282 **** 283 *************************************************************************** 284 */ 285 static void 286 print_caddr_t(void *data __unused) 287 { 288 kprintf("%s", (char *)data); 289 } 290 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 291 292 /* 293 * Leave the critical section that protected us from spurious interrupts 294 * so device probes work. 295 */ 296 static void 297 leavecrit(void *dummy __unused) 298 { 299 MachIntrABI.finalize(); 300 cpu_enable_intr(); 301 MachIntrABI.cleanup(); 302 crit_exit(); 303 KKASSERT(!IN_CRITICAL_SECT(curthread)); 304 305 if (bootverbose) 306 kprintf("Leaving critical section, allowing interrupts\n"); 307 } 308 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL) 309 310 /* 311 * This is called after the threading system is up and running, 312 * including the softclock, clock interrupts, and SMP. 313 */ 314 static void 315 tsleepworks(void *dummy __unused) 316 { 317 tsleep_now_works = 1; 318 } 319 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL) 320 321 /* 322 * This is called after devices have configured. Tell the kernel we are 323 * no longer in cold boot. 324 */ 325 static void 326 endofcoldboot(void *dummy __unused) 327 { 328 cold = 0; 329 } 330 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL) 331 332 /* 333 *************************************************************************** 334 **** 335 **** The two following SYSINT's are proc0 specific glue code. I am not 336 **** convinced that they can not be safely combined, but their order of 337 **** operation has been maintained as the same as the original init_main.c 338 **** for right now. 339 **** 340 **** These probably belong in init_proc.c or kern_proc.c, since they 341 **** deal with proc0 (the fork template process). 342 **** 343 *************************************************************************** 344 */ 345 /* ARGSUSED*/ 346 static void 347 proc0_init(void *dummy __unused) 348 { 349 struct proc *p; 350 struct lwp *lp; 351 352 p = &proc0; 353 lp = &lwp0; 354 355 /* 356 * Initialize process and pgrp structures. 357 */ 358 procinit(); 359 360 /* 361 * additional VM structures 362 */ 363 vm_init2(); 364 365 /* 366 * Create process 0 (the swapper). 367 */ 368 LIST_INSERT_HEAD(&allproc, p, p_list); 369 p->p_pgrp = &pgrp0; 370 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 371 LIST_INIT(&pgrp0.pg_members); 372 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 373 374 pgrp0.pg_session = &session0; 375 session0.s_count = 1; 376 session0.s_leader = p; 377 378 p->p_sysent = &aout_sysvec; 379 380 p->p_flag = P_SYSTEM; 381 p->p_stat = SACTIVE; 382 lp->lwp_stat = LSRUN; 383 p->p_nice = NZERO; 384 p->p_rtprio.type = RTP_PRIO_NORMAL; 385 p->p_rtprio.prio = 0; 386 lp->lwp_rtprio = p->p_rtprio; 387 388 p->p_peers = 0; 389 p->p_leader = p; 390 391 bcopy("swapper", p->p_comm, sizeof ("swapper")); 392 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 393 394 /* Create credentials. */ 395 p->p_ucred = crget(); 396 p->p_ucred->cr_ruidinfo = uifind(0); 397 p->p_ucred->cr_ngroups = 1; /* group 0 */ 398 p->p_ucred->cr_uidinfo = uifind(0); 399 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 400 401 /* Don't jail it */ 402 p->p_ucred->cr_prison = NULL; 403 404 /* Create sigacts. */ 405 p->p_sigacts = &sigacts0; 406 p->p_sigacts->ps_refcnt = 1; 407 408 /* Initialize signal state for process 0. */ 409 siginit(p); 410 411 /* Create the file descriptor table. */ 412 fdinit_bootstrap(p, &filedesc0, cmask); 413 414 /* Create the limits structures. */ 415 plimit_init0(&limit0); 416 p->p_limit = &limit0; 417 418 /* Allocate a prototype map so we have something to fork. */ 419 pmap_pinit0(vmspace_pmap(&vmspace0)); 420 p->p_vmspace = &vmspace0; 421 lp->lwp_vmspace = p->p_vmspace; 422 sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class); 423 vm_map_init(&vmspace0.vm_map, 424 round_page(VM_MIN_USER_ADDRESS), 425 trunc_page(VM_MAX_USER_ADDRESS), 426 vmspace_pmap(&vmspace0)); 427 sysref_activate(&vmspace0.vm_sysref); 428 429 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 430 431 /* 432 * Charge root for one process. 433 */ 434 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 435 vm_init_limits(p); 436 } 437 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL) 438 439 static int proc0_post_callback(struct proc *p, void *data __unused); 440 441 /* ARGSUSED*/ 442 static void 443 proc0_post(void *dummy __unused) 444 { 445 struct timespec ts; 446 447 /* 448 * Now we can look at the time, having had a chance to verify the 449 * time from the file system. Pretend that proc0 started now. 450 */ 451 allproc_scan(proc0_post_callback, NULL); 452 453 /* 454 * Give the ``random'' number generator a thump. 455 * XXX: Does read_random() contain enough bits to be used here ? 456 */ 457 nanotime(&ts); 458 skrandom(ts.tv_sec ^ ts.tv_nsec); 459 } 460 461 static int 462 proc0_post_callback(struct proc *p, void *data __unused) 463 { 464 microtime(&p->p_start); 465 return(0); 466 } 467 468 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL) 469 470 /* 471 *************************************************************************** 472 **** 473 **** The following SYSINIT's and glue code should be moved to the 474 **** respective files on a per subsystem basis. 475 **** 476 *************************************************************************** 477 */ 478 479 480 /* 481 *************************************************************************** 482 **** 483 **** The following code probably belongs in another file, like 484 **** kern/init_init.c. 485 **** 486 *************************************************************************** 487 */ 488 489 /* 490 * List of paths to try when searching for "init". 491 */ 492 static char init_path[MAXPATHLEN] = 493 #ifdef INIT_PATH 494 __XSTRING(INIT_PATH); 495 #else 496 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 497 #endif 498 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 499 500 /* 501 * Start the initial user process; try exec'ing each pathname in init_path. 502 * The program is invoked with one argument containing the boot flags. 503 */ 504 static void 505 start_init(void *dummy, struct trapframe *frame) 506 { 507 vm_offset_t addr; 508 struct execve_args args; 509 int options, error; 510 char *var, *path, *next, *s; 511 char *ucp, **uap, *arg0, *arg1; 512 struct proc *p; 513 struct lwp *lp; 514 struct mount *mp; 515 struct vnode *vp; 516 char *env; 517 518 /* 519 * This is passed in by the bootloader 520 */ 521 env = kgetenv("kernelname"); 522 if (env != NULL) 523 strlcpy(kernelname, env, sizeof(kernelname)); 524 525 /* 526 * The MP lock is not held on entry. We release it before 527 * returning to userland. 528 */ 529 get_mplock(); 530 p = curproc; 531 532 lp = ONLY_LWP_IN_PROC(p); 533 534 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 535 mp = mountlist_boot_getfirst(); 536 if (VFS_ROOT(mp, &vp)) 537 panic("cannot find root vnode"); 538 if (mp->mnt_ncmountpt.ncp == NULL) { 539 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 540 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 541 } 542 p->p_fd->fd_cdir = vp; 543 vref(p->p_fd->fd_cdir); 544 p->p_fd->fd_rdir = vp; 545 vref(p->p_fd->fd_rdir); 546 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 547 vn_unlock(vp); /* leave ref intact */ 548 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 549 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 550 551 kprintf("Mounting devfs\n"); 552 vfs_mountroot_devfs(); 553 554 /* 555 * Need just enough stack to hold the faked-up "execve()" arguments. 556 */ 557 addr = trunc_page(USRSTACK - PAGE_SIZE); 558 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, 559 PAGE_SIZE, PAGE_SIZE, 560 FALSE, VM_MAPTYPE_NORMAL, 561 VM_PROT_ALL, VM_PROT_ALL, 562 0); 563 if (error) 564 panic("init: couldn't allocate argument space"); 565 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 566 p->p_vmspace->vm_ssize = 1; 567 568 if ((var = kgetenv("init_path")) != NULL) { 569 strncpy(init_path, var, sizeof init_path); 570 init_path[sizeof init_path - 1] = 0; 571 } 572 if ((var = kgetenv("kern.fallback_elf_brand")) != NULL) 573 fallback_elf_brand = strtol(var, NULL, 0); 574 575 for (path = init_path; *path != '\0'; path = next) { 576 while (*path == ':') 577 path++; 578 if (*path == '\0') 579 break; 580 for (next = path; *next != '\0' && *next != ':'; next++) 581 /* nothing */ ; 582 if (bootverbose) 583 kprintf("start_init: trying %.*s\n", (int)(next - path), 584 path); 585 586 /* 587 * Move out the boot flag argument. 588 */ 589 options = 0; 590 ucp = (char *)USRSTACK; 591 (void)subyte(--ucp, 0); /* trailing zero */ 592 if (boothowto & RB_SINGLE) { 593 (void)subyte(--ucp, 's'); 594 options = 1; 595 } 596 #ifdef notyet 597 if (boothowto & RB_FASTBOOT) { 598 (void)subyte(--ucp, 'f'); 599 options = 1; 600 } 601 #endif 602 603 #ifdef BOOTCDROM 604 (void)subyte(--ucp, 'C'); 605 options = 1; 606 #endif 607 if (options == 0) 608 (void)subyte(--ucp, '-'); 609 (void)subyte(--ucp, '-'); /* leading hyphen */ 610 arg1 = ucp; 611 612 /* 613 * Move out the file name (also arg 0). 614 */ 615 (void)subyte(--ucp, 0); 616 for (s = next - 1; s >= path; s--) 617 (void)subyte(--ucp, *s); 618 arg0 = ucp; 619 620 /* 621 * Move out the arg pointers. 622 */ 623 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 624 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 625 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 626 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 627 628 /* 629 * Point at the arguments. 630 */ 631 args.fname = arg0; 632 args.argv = uap; 633 args.envv = NULL; 634 635 /* 636 * Now try to exec the program. If can't for any reason 637 * other than it doesn't exist, complain. 638 * 639 * Otherwise, return via fork_trampoline() all the way 640 * to user mode as init! 641 * 642 * WARNING! We may have been moved to another cpu after 643 * acquiring the current user process designation. The 644 * MP lock will migrate with us though so we still have to 645 * release it. 646 */ 647 if ((error = sys_execve(&args)) == 0) { 648 rel_mplock(); 649 lp->lwp_proc->p_usched->acquire_curproc(lp); 650 return; 651 } 652 if (error != ENOENT) 653 kprintf("exec %.*s: error %d\n", (int)(next - path), 654 path, error); 655 } 656 kprintf("init: not found in path %s\n", init_path); 657 panic("no init"); 658 } 659 660 /* 661 * Like kthread_create(), but runs in it's own address space. 662 * We do this early to reserve pid 1. 663 * 664 * Note special case - do not make it runnable yet. Other work 665 * in progress will change this more. 666 */ 667 static void 668 create_init(const void *udata __unused) 669 { 670 int error; 671 struct lwp *lp; 672 673 crit_enter(); 674 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 675 if (error) 676 panic("cannot fork init: %d", error); 677 initproc->p_flag |= P_SYSTEM; 678 lp = ONLY_LWP_IN_PROC(initproc); 679 cpu_set_fork_handler(lp, start_init, NULL); 680 crit_exit(); 681 } 682 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 683 684 /* 685 * Make it runnable now. 686 */ 687 static void 688 kick_init(const void *udata __unused) 689 { 690 start_forked_proc(&lwp0, initproc); 691 } 692 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 693 694 /* 695 * Machine independant globaldata initialization 696 * 697 * WARNING! Called from early boot, 'mycpu' may not work yet. 698 */ 699 void 700 mi_gdinit(struct globaldata *gd, int cpuid) 701 { 702 TAILQ_INIT(&gd->gd_systimerq); 703 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 704 gd->gd_cpuid = cpuid; 705 gd->gd_cpumask = CPUMASK(cpuid); 706 lwkt_gdinit(gd); 707 vm_map_entry_reserve_cpu_init(gd); 708 sleep_gdinit(gd); 709 } 710 711