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 lwkt_token_init(&lwp0.lwp_token, "lwp_token"); 180 spin_init(&lwp0.lwp_spin); 181 varsymset_init(&proc0.p_varsymset, NULL); 182 thread0.td_flags |= TDF_RUNNING; 183 thread0.td_proc = &proc0; 184 thread0.td_lwp = &lwp0; 185 thread0.td_switch = cpu_lwkt_switch; 186 lwkt_schedule_self(curthread); 187 } 188 189 /* 190 * System startup; initialize the world, create process 0, mount root 191 * filesystem, and fork to create init and pagedaemon. Most of the 192 * hard work is done in the lower-level initialization routines including 193 * startup(), which does memory initialization and autoconfiguration. 194 * 195 * This allows simple addition of new kernel subsystems that require 196 * boot time initialization. It also allows substitution of subsystem 197 * (for instance, a scheduler, kernel profiler, or VM system) by object 198 * module. Finally, it allows for optional "kernel threads". 199 */ 200 void 201 mi_startup(void) 202 { 203 struct sysinit *sip; /* system initialization*/ 204 struct sysinit **sipp; /* system initialization*/ 205 struct sysinit **xipp; /* interior loop of sort*/ 206 struct sysinit *save; /* bubble*/ 207 208 if (sysinit == NULL) { 209 sysinit = SET_BEGIN(sysinit_set); 210 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 211 /* 212 * XXX For whatever reason, on 64-bit vkernels 213 * the value of sysinit obtained from the 214 * linker set is wrong. 215 */ 216 if ((long)sysinit % 8 != 0) { 217 kprintf("Fixing sysinit value...\n"); 218 sysinit = (void *)((long)(intptr_t)sysinit + 4); 219 } 220 #endif 221 sysinit_end = SET_LIMIT(sysinit_set); 222 } 223 #if defined(__amd64__) && defined(_KERNEL_VIRTUAL) 224 KKASSERT((long)sysinit % 8 == 0); 225 #endif 226 227 restart: 228 /* 229 * Perform a bubble sort of the system initialization objects by 230 * their subsystem (primary key) and order (secondary key). 231 */ 232 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 233 for (xipp = sipp + 1; xipp < sysinit_end; xipp++) { 234 if ((*sipp)->subsystem < (*xipp)->subsystem || 235 ((*sipp)->subsystem == (*xipp)->subsystem && 236 (*sipp)->order <= (*xipp)->order)) 237 continue; /* skip*/ 238 save = *sipp; 239 *sipp = *xipp; 240 *xipp = save; 241 } 242 } 243 244 /* 245 * Traverse the (now) ordered list of system initialization tasks. 246 * Perform each task, and continue on to the next task. 247 * 248 * The last item on the list is expected to be the scheduler, 249 * which will not return. 250 */ 251 for (sipp = sysinit; sipp < sysinit_end; sipp++) { 252 sip = *sipp; 253 if (sip->subsystem == SI_SPECIAL_DUMMY) 254 continue; /* skip dummy task(s)*/ 255 256 if (sip->subsystem == SI_SPECIAL_DONE) 257 continue; 258 259 /* Call function */ 260 (*(sip->func))(sip->udata); 261 262 /* Check off the one we're just done */ 263 sip->subsystem = SI_SPECIAL_DONE; 264 265 /* Check if we've installed more sysinit items via KLD */ 266 if (newsysinit != NULL) { 267 if (sysinit != SET_BEGIN(sysinit_set)) 268 kfree(sysinit, M_TEMP); 269 sysinit = newsysinit; 270 sysinit_end = newsysinit_end; 271 newsysinit = NULL; 272 newsysinit_end = NULL; 273 goto restart; 274 } 275 } 276 277 panic("Shouldn't get here!"); 278 /* NOTREACHED*/ 279 } 280 281 282 /* 283 *************************************************************************** 284 **** 285 **** The following SYSINIT's belong elsewhere, but have not yet 286 **** been moved. 287 **** 288 *************************************************************************** 289 */ 290 static void 291 print_caddr_t(void *data __unused) 292 { 293 kprintf("%s", (char *)data); 294 } 295 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright) 296 297 /* 298 * Leave the critical section that protected us from spurious interrupts 299 * so device probes work. 300 */ 301 static void 302 leavecrit(void *dummy __unused) 303 { 304 MachIntrABI.stabilize(); 305 cpu_enable_intr(); 306 MachIntrABI.cleanup(); 307 crit_exit(); 308 KKASSERT(!IN_CRITICAL_SECT(curthread)); 309 310 if (bootverbose) 311 kprintf("Leaving critical section, allowing interrupts\n"); 312 } 313 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL) 314 315 /* 316 * This is called after the threading system is up and running, 317 * including the softclock, clock interrupts, and SMP. 318 */ 319 static void 320 tsleepworks(void *dummy __unused) 321 { 322 tsleep_now_works = 1; 323 } 324 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL) 325 326 /* 327 * This is called after devices have configured. Tell the kernel we are 328 * no longer in cold boot. 329 */ 330 static void 331 endofcoldboot(void *dummy __unused) 332 { 333 cold = 0; 334 } 335 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL) 336 337 /* 338 *************************************************************************** 339 **** 340 **** The two following SYSINT's are proc0 specific glue code. I am not 341 **** convinced that they can not be safely combined, but their order of 342 **** operation has been maintained as the same as the original init_main.c 343 **** for right now. 344 **** 345 **** These probably belong in init_proc.c or kern_proc.c, since they 346 **** deal with proc0 (the fork template process). 347 **** 348 *************************************************************************** 349 */ 350 /* ARGSUSED*/ 351 static void 352 proc0_init(void *dummy __unused) 353 { 354 struct proc *p; 355 struct lwp *lp; 356 357 p = &proc0; 358 lp = &lwp0; 359 360 /* 361 * Initialize osrel 362 */ 363 p->p_osrel = osreldate; 364 365 /* 366 * Initialize process and pgrp structures. 367 */ 368 procinit(); 369 370 /* 371 * additional VM structures 372 */ 373 vm_init2(); 374 375 /* 376 * Create process 0 (the swapper). 377 */ 378 LIST_INSERT_HEAD(&allproc, p, p_list); 379 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 380 LIST_INIT(&pgrp0.pg_members); 381 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 382 refcount_init(&pgrp0.pg_refs, 1); 383 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 384 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 385 386 pgrp0.pg_session = &session0; 387 session0.s_count = 1; 388 session0.s_leader = p; 389 390 pgref(&pgrp0); 391 p->p_pgrp = &pgrp0; 392 393 p->p_sysent = &aout_sysvec; 394 395 p->p_flags = P_SYSTEM; 396 p->p_stat = SACTIVE; 397 lp->lwp_stat = LSRUN; 398 p->p_nice = NZERO; 399 p->p_rtprio.type = RTP_PRIO_NORMAL; 400 p->p_rtprio.prio = 0; 401 lp->lwp_rtprio = p->p_rtprio; 402 403 p->p_peers = 0; 404 p->p_leader = p; 405 406 bcopy("swapper", p->p_comm, sizeof ("swapper")); 407 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 408 409 /* Create credentials. */ 410 p->p_ucred = crget(); 411 p->p_ucred->cr_ruidinfo = uifind(0); 412 p->p_ucred->cr_ngroups = 1; /* group 0 */ 413 p->p_ucred->cr_uidinfo = uifind(0); 414 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 415 416 /* Don't jail it */ 417 p->p_ucred->cr_prison = NULL; 418 419 /* Create sigacts. */ 420 p->p_sigacts = &sigacts0; 421 refcount_init(&p->p_sigacts->ps_refcnt, 1); 422 423 /* Initialize signal state for process 0. */ 424 siginit(p); 425 426 /* Create the file descriptor table. */ 427 fdinit_bootstrap(p, &filedesc0, cmask); 428 429 /* Create the limits structures. */ 430 plimit_init0(&limit0); 431 p->p_limit = &limit0; 432 433 /* Allocate a prototype map so we have something to fork. */ 434 pmap_pinit0(vmspace_pmap(&vmspace0)); 435 p->p_vmspace = &vmspace0; 436 lp->lwp_vmspace = p->p_vmspace; 437 sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class); 438 vm_map_init(&vmspace0.vm_map, 439 round_page(VM_MIN_USER_ADDRESS), 440 trunc_page(VM_MAX_USER_ADDRESS), 441 vmspace_pmap(&vmspace0)); 442 sysref_activate(&vmspace0.vm_sysref); 443 444 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 445 446 /* 447 * Charge root for one process. 448 */ 449 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 450 vm_init_limits(p); 451 } 452 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL) 453 454 static int proc0_post_callback(struct proc *p, void *data __unused); 455 456 /* ARGSUSED*/ 457 static void 458 proc0_post(void *dummy __unused) 459 { 460 struct timespec ts; 461 462 /* 463 * Now we can look at the time, having had a chance to verify the 464 * time from the file system. Pretend that proc0 started now. 465 */ 466 allproc_scan(proc0_post_callback, NULL); 467 468 /* 469 * Give the ``random'' number generator a thump. 470 * XXX: Does read_random() contain enough bits to be used here ? 471 */ 472 nanotime(&ts); 473 skrandom(ts.tv_sec ^ ts.tv_nsec); 474 } 475 476 static int 477 proc0_post_callback(struct proc *p, void *data __unused) 478 { 479 microtime(&p->p_start); 480 return(0); 481 } 482 483 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL) 484 485 /* 486 *************************************************************************** 487 **** 488 **** The following SYSINIT's and glue code should be moved to the 489 **** respective files on a per subsystem basis. 490 **** 491 *************************************************************************** 492 */ 493 494 495 /* 496 *************************************************************************** 497 **** 498 **** The following code probably belongs in another file, like 499 **** kern/init_init.c. 500 **** 501 *************************************************************************** 502 */ 503 504 /* 505 * List of paths to try when searching for "init". 506 */ 507 static char init_path[MAXPATHLEN] = 508 #ifdef INIT_PATH 509 __XSTRING(INIT_PATH); 510 #else 511 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 512 #endif 513 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 514 515 /* 516 * Start the initial user process; try exec'ing each pathname in init_path. 517 * The program is invoked with one argument containing the boot flags. 518 */ 519 static void 520 start_init(void *dummy, struct trapframe *frame) 521 { 522 vm_offset_t addr; 523 struct execve_args args; 524 int options, error; 525 char *var, *path, *next, *s; 526 char *ucp, **uap, *arg0, *arg1; 527 struct proc *p; 528 struct lwp *lp; 529 struct mount *mp; 530 struct vnode *vp; 531 char *env; 532 533 /* 534 * This is passed in by the bootloader 535 */ 536 env = kgetenv("kernelname"); 537 if (env != NULL) 538 strlcpy(kernelname, env, sizeof(kernelname)); 539 540 /* 541 * The MP lock is not held on entry. We release it before 542 * returning to userland. 543 */ 544 get_mplock(); 545 p = curproc; 546 547 lp = ONLY_LWP_IN_PROC(p); 548 549 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 550 mp = mountlist_boot_getfirst(); 551 if (VFS_ROOT(mp, &vp)) 552 panic("cannot find root vnode"); 553 if (mp->mnt_ncmountpt.ncp == NULL) { 554 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 555 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 556 } 557 p->p_fd->fd_cdir = vp; 558 vref(p->p_fd->fd_cdir); 559 p->p_fd->fd_rdir = vp; 560 vref(p->p_fd->fd_rdir); 561 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 562 vn_unlock(vp); /* leave ref intact */ 563 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 564 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 565 566 kprintf("Mounting devfs\n"); 567 vfs_mountroot_devfs(); 568 569 /* 570 * Need just enough stack to hold the faked-up "execve()" arguments. 571 */ 572 addr = trunc_page(USRSTACK - PAGE_SIZE); 573 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, 574 PAGE_SIZE, PAGE_SIZE, 575 FALSE, VM_MAPTYPE_NORMAL, 576 VM_PROT_ALL, VM_PROT_ALL, 577 0); 578 if (error) 579 panic("init: couldn't allocate argument space"); 580 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 581 p->p_vmspace->vm_ssize = 1; 582 583 if ((var = kgetenv("init_path")) != NULL) { 584 strncpy(init_path, var, sizeof init_path); 585 init_path[sizeof init_path - 1] = 0; 586 } 587 588 for (path = init_path; *path != '\0'; path = next) { 589 while (*path == ':') 590 path++; 591 if (*path == '\0') 592 break; 593 for (next = path; *next != '\0' && *next != ':'; next++) 594 /* nothing */ ; 595 if (bootverbose) 596 kprintf("start_init: trying %.*s\n", (int)(next - path), 597 path); 598 599 /* 600 * Move out the boot flag argument. 601 */ 602 options = 0; 603 ucp = (char *)USRSTACK; 604 (void)subyte(--ucp, 0); /* trailing zero */ 605 if (boothowto & RB_SINGLE) { 606 (void)subyte(--ucp, 's'); 607 options = 1; 608 } 609 #ifdef notyet 610 if (boothowto & RB_FASTBOOT) { 611 (void)subyte(--ucp, 'f'); 612 options = 1; 613 } 614 #endif 615 616 #ifdef BOOTCDROM 617 (void)subyte(--ucp, 'C'); 618 options = 1; 619 #endif 620 if (options == 0) 621 (void)subyte(--ucp, '-'); 622 (void)subyte(--ucp, '-'); /* leading hyphen */ 623 arg1 = ucp; 624 625 /* 626 * Move out the file name (also arg 0). 627 */ 628 (void)subyte(--ucp, 0); 629 for (s = next - 1; s >= path; s--) 630 (void)subyte(--ucp, *s); 631 arg0 = ucp; 632 633 /* 634 * Move out the arg pointers. 635 */ 636 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 637 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 638 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 639 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 640 641 /* 642 * Point at the arguments. 643 */ 644 args.fname = arg0; 645 args.argv = uap; 646 args.envv = NULL; 647 648 /* 649 * Now try to exec the program. If can't for any reason 650 * other than it doesn't exist, complain. 651 * 652 * Otherwise, return via fork_trampoline() all the way 653 * to user mode as init! 654 * 655 * WARNING! We may have been moved to another cpu after 656 * acquiring the current user process designation. The 657 * MP lock will migrate with us though so we still have to 658 * release it. 659 */ 660 if ((error = sys_execve(&args)) == 0) { 661 rel_mplock(); 662 lp->lwp_proc->p_usched->acquire_curproc(lp); 663 return; 664 } 665 if (error != ENOENT) 666 kprintf("exec %.*s: error %d\n", (int)(next - path), 667 path, error); 668 } 669 kprintf("init: not found in path %s\n", init_path); 670 panic("no init"); 671 } 672 673 /* 674 * Like kthread_create(), but runs in it's own address space. 675 * We do this early to reserve pid 1. 676 * 677 * Note special case - do not make it runnable yet. Other work 678 * in progress will change this more. 679 */ 680 static void 681 create_init(const void *udata __unused) 682 { 683 int error; 684 struct lwp *lp; 685 686 crit_enter(); 687 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 688 if (error) 689 panic("cannot fork init: %d", error); 690 initproc->p_flags |= P_SYSTEM; 691 lp = ONLY_LWP_IN_PROC(initproc); 692 cpu_set_fork_handler(lp, start_init, NULL); 693 crit_exit(); 694 } 695 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 696 697 /* 698 * Make it runnable now. 699 */ 700 static void 701 kick_init(const void *udata __unused) 702 { 703 start_forked_proc(&lwp0, initproc); 704 } 705 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 706 707 /* 708 * Machine independant globaldata initialization 709 * 710 * WARNING! Called from early boot, 'mycpu' may not work yet. 711 */ 712 void 713 mi_gdinit(struct globaldata *gd, int cpuid) 714 { 715 TAILQ_INIT(&gd->gd_systimerq); 716 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 717 gd->gd_cpuid = cpuid; 718 gd->gd_cpumask = CPUMASK(cpuid); 719 lwkt_gdinit(gd); 720 vm_map_entry_reserve_cpu_init(gd); 721 sleep_gdinit(gd); 722 usched_global_cpumask |= CPUMASK(cpuid); 723 } 724 725