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 */ 44 45 #include "opt_init_path.h" 46 47 #include <sys/param.h> 48 #include <sys/file.h> 49 #include <sys/filedesc.h> 50 #include <sys/kernel.h> 51 #include <sys/mount.h> 52 #include <sys/sysctl.h> 53 #include <sys/proc.h> 54 #include <sys/resourcevar.h> 55 #include <sys/signalvar.h> 56 #include <sys/systm.h> 57 #include <sys/vnode.h> 58 #include <sys/sysent.h> 59 #include <sys/reboot.h> 60 #include <sys/sysproto.h> 61 #include <sys/vmmeter.h> 62 #include <sys/unistd.h> 63 #include <sys/malloc.h> 64 #include <sys/machintr.h> 65 66 #include <sys/refcount.h> 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 cpumask_t usched_global_cpumask; 101 extern struct user *proc0paddr; 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 SYSCTL_ULONG(_kern, OID_AUTO, usched_global_cpumask, CTLFLAG_RW, 107 &usched_global_cpumask, 0, "global user scheduler cpumask"); 108 109 /* 110 * This ensures that there is at least one entry so that the sysinit_set 111 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 112 * executed. 113 */ 114 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL) 115 116 /* 117 * The sysinit table itself. Items are checked off as the are run. 118 * If we want to register new sysinit types, add them to newsysinit. 119 */ 120 SET_DECLARE(sysinit_set, struct sysinit); 121 struct sysinit **sysinit, **sysinit_end; 122 struct sysinit **newsysinit, **newsysinit_end; 123 124 125 /* 126 * Merge a new sysinit set into the current set, reallocating it if 127 * necessary. This can only be called after malloc is running. 128 */ 129 void 130 sysinit_add(struct sysinit **set, struct sysinit **set_end) 131 { 132 struct sysinit **newset; 133 struct sysinit **sipp; 134 struct sysinit **xipp; 135 int count; 136 137 count = set_end - set; 138 if (newsysinit) 139 count += newsysinit_end - newsysinit; 140 else 141 count += sysinit_end - sysinit; 142 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 143 xipp = newset; 144 if (newsysinit) { 145 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 146 *xipp++ = *sipp; 147 } else { 148 for (sipp = sysinit; sipp < sysinit_end; sipp++) 149 *xipp++ = *sipp; 150 } 151 for (sipp = set; sipp < set_end; sipp++) 152 *xipp++ = *sipp; 153 if (newsysinit) 154 kfree(newsysinit, M_TEMP); 155 newsysinit = newset; 156 newsysinit_end = newset + count; 157 } 158 159 /* 160 * Callbacks from machine-dependant startup code (e.g. init386) to set 161 * up low level entities related to cpu #0's globaldata. 162 * 163 * Called from very low level boot code. 164 */ 165 void 166 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 167 { 168 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 169 lwkt_set_comm(&thread0, "thread0"); 170 RB_INIT(&proc0.p_lwp_tree); 171 spin_init(&proc0.p_spin); 172 lwkt_token_init(&proc0.p_token, "iproc"); 173 proc0.p_lasttid = 0; /* +1 = next TID */ 174 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 175 lwp0.lwp_thread = &thread0; 176 lwp0.lwp_proc = &proc0; 177 proc0.p_usched = usched_init(); 178 lwp0.lwp_cpumask = (cpumask_t)-1; 179 varsymset_init(&proc0.p_varsymset, NULL); 180 thread0.td_flags |= TDF_RUNNING; 181 thread0.td_proc = &proc0; 182 thread0.td_lwp = &lwp0; 183 thread0.td_switch = cpu_lwkt_switch; 184 lwkt_schedule_self(curthread); 185 } 186 187 /* 188 * System startup; initialize the world, create process 0, mount root 189 * filesystem, and fork to create init and pagedaemon. Most of the 190 * hard work is done in the lower-level initialization routines including 191 * startup(), which does memory initialization and autoconfiguration. 192 * 193 * This allows simple addition of new kernel subsystems that require 194 * boot time initialization. It also allows substitution of subsystem 195 * (for instance, a scheduler, kernel profiler, or VM system) by object 196 * module. Finally, it allows for optional "kernel threads". 197 */ 198 void 199 mi_startup(void) 200 { 201 struct sysinit *sip; /* system initialization*/ 202 struct sysinit **sipp; /* system initialization*/ 203 struct sysinit **xipp; /* interior loop of sort*/ 204 struct sysinit *save; /* bubble*/ 205 206 if (sysinit == NULL) { 207 sysinit = SET_BEGIN(sysinit_set); 208 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 209 /* 210 * XXX For whatever reason, on 64-bit vkernels 211 * the value of sysinit obtained from the 212 * linker set is wrong. 213 */ 214 if ((long)sysinit % 8 != 0) { 215 kprintf("Fixing sysinit value...\n"); 216 sysinit = (long)sysinit + 4; 217 } 218 #endif 219 sysinit_end = SET_LIMIT(sysinit_set); 220 } 221 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 222 KKASSERT((long)sysinit % 8 == 0); 223 #endif 224 225 restart: 226 /* 227 * Perform a bubble sort of the system initialization objects by 228 * their subsystem (primary key) and order (secondary key). 229 */ 230 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 231 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 232 if ((*sipp)->subsystem < (*xipp)->subsystem || 233 ((*sipp)->subsystem == (*xipp)->subsystem && 234 (*sipp)->order <= (*xipp)->order)) 235 continue; /* skip*/ 236 save = *sipp; 237 *sipp = *xipp; 238 *xipp = save; 239 } 240 } 241 242 /* 243 * Traverse the (now) ordered list of system initialization tasks. 244 * Perform each task, and continue on to the next task. 245 * 246 * The last item on the list is expected to be the scheduler, 247 * which will not return. 248 */ 249 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 250 sip = *sipp; 251 if (sip->subsystem == SI_SPECIAL_DUMMY) 252 continue; /* skip dummy task(s)*/ 253 254 if (sip->subsystem == SI_SPECIAL_DONE) 255 continue; 256 257 /* Call function */ 258 (*(sip->func))(sip->udata); 259 260 /* Check off the one we're just done */ 261 sip->subsystem = SI_SPECIAL_DONE; 262 263 /* Check if we've installed more sysinit items via KLD */ 264 if (newsysinit != NULL) { 265 if (sysinit != SET_BEGIN(sysinit_set)) 266 kfree(sysinit, M_TEMP); 267 sysinit = newsysinit; 268 sysinit_end = newsysinit_end; 269 newsysinit = NULL; 270 newsysinit_end = NULL; 271 goto restart; 272 } 273 } 274 275 panic("Shouldn't get here!"); 276 /* NOTREACHED*/ 277 } 278 279 280 /* 281 *************************************************************************** 282 **** 283 **** The following SYSINIT's belong elsewhere, but have not yet 284 **** been moved. 285 **** 286 *************************************************************************** 287 */ 288 static void 289 print_caddr_t(void *data __unused) 290 { 291 kprintf("%s", (char *)data); 292 } 293 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 294 295 /* 296 * Leave the critical section that protected us from spurious interrupts 297 * so device probes work. 298 */ 299 static void 300 leavecrit(void *dummy __unused) 301 { 302 MachIntrABI.stabilize(); 303 cpu_enable_intr(); 304 MachIntrABI.cleanup(); 305 crit_exit(); 306 KKASSERT(!IN_CRITICAL_SECT(curthread)); 307 308 if (bootverbose) 309 kprintf("Leaving critical section, allowing interrupts\n"); 310 } 311 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL) 312 313 /* 314 * This is called after the threading system is up and running, 315 * including the softclock, clock interrupts, and SMP. 316 */ 317 static void 318 tsleepworks(void *dummy __unused) 319 { 320 tsleep_now_works = 1; 321 } 322 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL) 323 324 /* 325 * This is called after devices have configured. Tell the kernel we are 326 * no longer in cold boot. 327 */ 328 static void 329 endofcoldboot(void *dummy __unused) 330 { 331 cold = 0; 332 } 333 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL) 334 335 /* 336 *************************************************************************** 337 **** 338 **** The two following SYSINT's are proc0 specific glue code. I am not 339 **** convinced that they can not be safely combined, but their order of 340 **** operation has been maintained as the same as the original init_main.c 341 **** for right now. 342 **** 343 **** These probably belong in init_proc.c or kern_proc.c, since they 344 **** deal with proc0 (the fork template process). 345 **** 346 *************************************************************************** 347 */ 348 /* ARGSUSED*/ 349 static void 350 proc0_init(void *dummy __unused) 351 { 352 struct proc *p; 353 struct lwp *lp; 354 355 p = &proc0; 356 lp = &lwp0; 357 358 /* 359 * Initialize osrel 360 */ 361 p->p_osrel = osreldate; 362 363 /* 364 * Initialize process and pgrp structures. 365 */ 366 procinit(); 367 368 /* 369 * additional VM structures 370 */ 371 vm_init2(); 372 373 /* 374 * Create process 0 (the swapper). 375 */ 376 LIST_INSERT_HEAD(&allproc, p, p_list); 377 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 378 LIST_INIT(&pgrp0.pg_members); 379 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 380 refcount_init(&pgrp0.pg_refs, 1); 381 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 382 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 383 384 pgrp0.pg_session = &session0; 385 session0.s_count = 1; 386 session0.s_leader = p; 387 388 pgref(&pgrp0); 389 p->p_pgrp = &pgrp0; 390 391 p->p_sysent = &aout_sysvec; 392 393 p->p_flag = P_SYSTEM; 394 p->p_stat = SACTIVE; 395 lp->lwp_stat = LSRUN; 396 p->p_nice = NZERO; 397 p->p_rtprio.type = RTP_PRIO_NORMAL; 398 p->p_rtprio.prio = 0; 399 lp->lwp_rtprio = p->p_rtprio; 400 401 p->p_peers = 0; 402 p->p_leader = p; 403 404 bcopy("swapper", p->p_comm, sizeof ("swapper")); 405 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 406 407 /* Create credentials. */ 408 p->p_ucred = crget(); 409 p->p_ucred->cr_ruidinfo = uifind(0); 410 p->p_ucred->cr_ngroups = 1; /* group 0 */ 411 p->p_ucred->cr_uidinfo = uifind(0); 412 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 413 414 /* Don't jail it */ 415 p->p_ucred->cr_prison = NULL; 416 417 /* Create sigacts. */ 418 p->p_sigacts = &sigacts0; 419 refcount_init(&p->p_sigacts->ps_refcnt, 1); 420 421 /* Initialize signal state for process 0. */ 422 siginit(p); 423 424 /* Create the file descriptor table. */ 425 fdinit_bootstrap(p, &filedesc0, cmask); 426 427 /* Create the limits structures. */ 428 plimit_init0(&limit0); 429 p->p_limit = &limit0; 430 431 /* Allocate a prototype map so we have something to fork. */ 432 pmap_pinit0(vmspace_pmap(&vmspace0)); 433 p->p_vmspace = &vmspace0; 434 lp->lwp_vmspace = p->p_vmspace; 435 sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class); 436 vm_map_init(&vmspace0.vm_map, 437 round_page(VM_MIN_USER_ADDRESS), 438 trunc_page(VM_MAX_USER_ADDRESS), 439 vmspace_pmap(&vmspace0)); 440 sysref_activate(&vmspace0.vm_sysref); 441 442 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 443 444 /* 445 * Charge root for one process. 446 */ 447 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 448 vm_init_limits(p); 449 } 450 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL) 451 452 static int proc0_post_callback(struct proc *p, void *data __unused); 453 454 /* ARGSUSED*/ 455 static void 456 proc0_post(void *dummy __unused) 457 { 458 struct timespec ts; 459 460 /* 461 * Now we can look at the time, having had a chance to verify the 462 * time from the file system. Pretend that proc0 started now. 463 */ 464 allproc_scan(proc0_post_callback, NULL); 465 466 /* 467 * Give the ``random'' number generator a thump. 468 * XXX: Does read_random() contain enough bits to be used here ? 469 */ 470 nanotime(&ts); 471 skrandom(ts.tv_sec ^ ts.tv_nsec); 472 } 473 474 static int 475 proc0_post_callback(struct proc *p, void *data __unused) 476 { 477 microtime(&p->p_start); 478 return(0); 479 } 480 481 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL) 482 483 /* 484 *************************************************************************** 485 **** 486 **** The following SYSINIT's and glue code should be moved to the 487 **** respective files on a per subsystem basis. 488 **** 489 *************************************************************************** 490 */ 491 492 493 /* 494 *************************************************************************** 495 **** 496 **** The following code probably belongs in another file, like 497 **** kern/init_init.c. 498 **** 499 *************************************************************************** 500 */ 501 502 /* 503 * List of paths to try when searching for "init". 504 */ 505 static char init_path[MAXPATHLEN] = 506 #ifdef INIT_PATH 507 __XSTRING(INIT_PATH); 508 #else 509 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 510 #endif 511 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 512 513 /* 514 * Start the initial user process; try exec'ing each pathname in init_path. 515 * The program is invoked with one argument containing the boot flags. 516 */ 517 static void 518 start_init(void *dummy, struct trapframe *frame) 519 { 520 vm_offset_t addr; 521 struct execve_args args; 522 int options, error; 523 char *var, *path, *next, *s; 524 char *ucp, **uap, *arg0, *arg1; 525 struct proc *p; 526 struct lwp *lp; 527 struct mount *mp; 528 struct vnode *vp; 529 char *env; 530 531 /* 532 * This is passed in by the bootloader 533 */ 534 env = kgetenv("kernelname"); 535 if (env != NULL) 536 strlcpy(kernelname, env, sizeof(kernelname)); 537 538 /* 539 * The MP lock is not held on entry. We release it before 540 * returning to userland. 541 */ 542 get_mplock(); 543 p = curproc; 544 545 lp = ONLY_LWP_IN_PROC(p); 546 547 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 548 mp = mountlist_boot_getfirst(); 549 if (VFS_ROOT(mp, &vp)) 550 panic("cannot find root vnode"); 551 if (mp->mnt_ncmountpt.ncp == NULL) { 552 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 553 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 554 } 555 p->p_fd->fd_cdir = vp; 556 vref(p->p_fd->fd_cdir); 557 p->p_fd->fd_rdir = vp; 558 vref(p->p_fd->fd_rdir); 559 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 560 vn_unlock(vp); /* leave ref intact */ 561 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 562 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 563 564 kprintf("Mounting devfs\n"); 565 vfs_mountroot_devfs(); 566 567 /* 568 * Need just enough stack to hold the faked-up "execve()" arguments. 569 */ 570 addr = trunc_page(USRSTACK - PAGE_SIZE); 571 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, 572 PAGE_SIZE, PAGE_SIZE, 573 FALSE, VM_MAPTYPE_NORMAL, 574 VM_PROT_ALL, VM_PROT_ALL, 575 0); 576 if (error) 577 panic("init: couldn't allocate argument space"); 578 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 579 p->p_vmspace->vm_ssize = 1; 580 581 if ((var = kgetenv("init_path")) != NULL) { 582 strncpy(init_path, var, sizeof init_path); 583 init_path[sizeof init_path - 1] = 0; 584 } 585 586 for (path = init_path; *path != '\0'; path = next) { 587 while (*path == ':') 588 path++; 589 if (*path == '\0') 590 break; 591 for (next = path; *next != '\0' && *next != ':'; next++) 592 /* nothing */ ; 593 if (bootverbose) 594 kprintf("start_init: trying %.*s\n", (int)(next - path), 595 path); 596 597 /* 598 * Move out the boot flag argument. 599 */ 600 options = 0; 601 ucp = (char *)USRSTACK; 602 (void)subyte(--ucp, 0); /* trailing zero */ 603 if (boothowto & RB_SINGLE) { 604 (void)subyte(--ucp, 's'); 605 options = 1; 606 } 607 #ifdef notyet 608 if (boothowto & RB_FASTBOOT) { 609 (void)subyte(--ucp, 'f'); 610 options = 1; 611 } 612 #endif 613 614 #ifdef BOOTCDROM 615 (void)subyte(--ucp, 'C'); 616 options = 1; 617 #endif 618 if (options == 0) 619 (void)subyte(--ucp, '-'); 620 (void)subyte(--ucp, '-'); /* leading hyphen */ 621 arg1 = ucp; 622 623 /* 624 * Move out the file name (also arg 0). 625 */ 626 (void)subyte(--ucp, 0); 627 for (s = next - 1; s >= path; s--) 628 (void)subyte(--ucp, *s); 629 arg0 = ucp; 630 631 /* 632 * Move out the arg pointers. 633 */ 634 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 635 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 636 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 637 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 638 639 /* 640 * Point at the arguments. 641 */ 642 args.fname = arg0; 643 args.argv = uap; 644 args.envv = NULL; 645 646 /* 647 * Now try to exec the program. If can't for any reason 648 * other than it doesn't exist, complain. 649 * 650 * Otherwise, return via fork_trampoline() all the way 651 * to user mode as init! 652 * 653 * WARNING! We may have been moved to another cpu after 654 * acquiring the current user process designation. The 655 * MP lock will migrate with us though so we still have to 656 * release it. 657 */ 658 if ((error = sys_execve(&args)) == 0) { 659 rel_mplock(); 660 lp->lwp_proc->p_usched->acquire_curproc(lp); 661 return; 662 } 663 if (error != ENOENT) 664 kprintf("exec %.*s: error %d\n", (int)(next - path), 665 path, error); 666 } 667 kprintf("init: not found in path %s\n", init_path); 668 panic("no init"); 669 } 670 671 /* 672 * Like kthread_create(), but runs in it's own address space. 673 * We do this early to reserve pid 1. 674 * 675 * Note special case - do not make it runnable yet. Other work 676 * in progress will change this more. 677 */ 678 static void 679 create_init(const void *udata __unused) 680 { 681 int error; 682 struct lwp *lp; 683 684 crit_enter(); 685 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 686 if (error) 687 panic("cannot fork init: %d", error); 688 initproc->p_flag |= P_SYSTEM; 689 lp = ONLY_LWP_IN_PROC(initproc); 690 cpu_set_fork_handler(lp, start_init, NULL); 691 crit_exit(); 692 } 693 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 694 695 /* 696 * Make it runnable now. 697 */ 698 static void 699 kick_init(const void *udata __unused) 700 { 701 start_forked_proc(&lwp0, initproc); 702 } 703 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 704 705 /* 706 * Machine independant globaldata initialization 707 * 708 * WARNING! Called from early boot, 'mycpu' may not work yet. 709 */ 710 void 711 mi_gdinit(struct globaldata *gd, int cpuid) 712 { 713 TAILQ_INIT(&gd->gd_systimerq); 714 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 715 gd->gd_cpuid = cpuid; 716 gd->gd_cpumask = CPUMASK(cpuid); 717 lwkt_gdinit(gd); 718 vm_map_entry_reserve_cpu_init(gd); 719 sleep_gdinit(gd); 720 usched_global_cpumask |= CPUMASK(cpuid); 721 } 722 723