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/refcount.h> 68 #include <sys/file2.h> 69 #include <sys/thread2.h> 70 #include <sys/sysref2.h> 71 #include <sys/spinlock2.h> 72 #include <sys/mplock2.h> 73 74 #include <machine/cpu.h> 75 76 #include <vm/vm.h> 77 #include <vm/vm_param.h> 78 #include <sys/lock.h> 79 #include <vm/pmap.h> 80 #include <vm/vm_map.h> 81 #include <vm/vm_extern.h> 82 #include <sys/user.h> 83 #include <sys/copyright.h> 84 85 int vfs_mountroot_devfs(void); 86 87 /* Components of the first process -- never freed. */ 88 static struct session session0; 89 static struct pgrp pgrp0; 90 static struct sigacts sigacts0; 91 static struct filedesc filedesc0; 92 static struct plimit limit0; 93 static struct vmspace vmspace0; 94 struct proc *initproc; 95 struct proc proc0; 96 struct lwp lwp0; 97 struct thread thread0; 98 99 int cmask = CMASK; 100 u_int cpu_mi_feature; 101 cpumask_t usched_global_cpumask; 102 extern struct user *proc0paddr; 103 extern int fallback_elf_brand; 104 105 int boothowto = 0; /* initialized so that it can be patched */ 106 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 107 "Reboot flags, from console subsystem"); 108 SYSCTL_ULONG(_kern, OID_AUTO, usched_global_cpumask, CTLFLAG_RW, 109 &usched_global_cpumask, 0, "global user scheduler cpumask"); 110 111 /* 112 * This ensures that there is at least one entry so that the sysinit_set 113 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 114 * executed. 115 */ 116 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL) 117 118 /* 119 * The sysinit table itself. Items are checked off as the are run. 120 * If we want to register new sysinit types, add them to newsysinit. 121 */ 122 SET_DECLARE(sysinit_set, struct sysinit); 123 struct sysinit **sysinit, **sysinit_end; 124 struct sysinit **newsysinit, **newsysinit_end; 125 126 127 /* 128 * Merge a new sysinit set into the current set, reallocating it if 129 * necessary. This can only be called after malloc is running. 130 */ 131 void 132 sysinit_add(struct sysinit **set, struct sysinit **set_end) 133 { 134 struct sysinit **newset; 135 struct sysinit **sipp; 136 struct sysinit **xipp; 137 int count; 138 139 count = set_end - set; 140 if (newsysinit) 141 count += newsysinit_end - newsysinit; 142 else 143 count += sysinit_end - sysinit; 144 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 145 xipp = newset; 146 if (newsysinit) { 147 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 148 *xipp++ = *sipp; 149 } else { 150 for (sipp = sysinit; sipp < sysinit_end; sipp++) 151 *xipp++ = *sipp; 152 } 153 for (sipp = set; sipp < set_end; sipp++) 154 *xipp++ = *sipp; 155 if (newsysinit) 156 kfree(newsysinit, M_TEMP); 157 newsysinit = newset; 158 newsysinit_end = newset + count; 159 } 160 161 /* 162 * Callbacks from machine-dependant startup code (e.g. init386) to set 163 * up low level entities related to cpu #0's globaldata. 164 * 165 * Called from very low level boot code. 166 */ 167 void 168 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 169 { 170 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 171 lwkt_set_comm(&thread0, "thread0"); 172 RB_INIT(&proc0.p_lwp_tree); 173 spin_init(&proc0.p_spin); 174 lwkt_token_init(&proc0.p_token, "iproc"); 175 proc0.p_lasttid = 0; /* +1 = next TID */ 176 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 177 lwp0.lwp_thread = &thread0; 178 lwp0.lwp_proc = &proc0; 179 proc0.p_usched = usched_init(); 180 lwp0.lwp_cpumask = (cpumask_t)-1; 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 = (long)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 process and pgrp structures. 362 */ 363 procinit(); 364 365 /* 366 * additional VM structures 367 */ 368 vm_init2(); 369 370 /* 371 * Create process 0 (the swapper). 372 */ 373 LIST_INSERT_HEAD(&allproc, p, p_list); 374 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 375 LIST_INIT(&pgrp0.pg_members); 376 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 377 refcount_init(&pgrp0.pg_refs, 1); 378 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 379 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 380 381 pgrp0.pg_session = &session0; 382 session0.s_count = 1; 383 session0.s_leader = p; 384 385 pgref(&pgrp0); 386 p->p_pgrp = &pgrp0; 387 388 p->p_sysent = &aout_sysvec; 389 390 p->p_flag = P_SYSTEM; 391 p->p_stat = SACTIVE; 392 lp->lwp_stat = LSRUN; 393 p->p_nice = NZERO; 394 p->p_rtprio.type = RTP_PRIO_NORMAL; 395 p->p_rtprio.prio = 0; 396 lp->lwp_rtprio = p->p_rtprio; 397 398 p->p_peers = 0; 399 p->p_leader = p; 400 401 bcopy("swapper", p->p_comm, sizeof ("swapper")); 402 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 403 404 /* Create credentials. */ 405 p->p_ucred = crget(); 406 p->p_ucred->cr_ruidinfo = uifind(0); 407 p->p_ucred->cr_ngroups = 1; /* group 0 */ 408 p->p_ucred->cr_uidinfo = uifind(0); 409 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 410 411 /* Don't jail it */ 412 p->p_ucred->cr_prison = NULL; 413 414 /* Create sigacts. */ 415 p->p_sigacts = &sigacts0; 416 refcount_init(&p->p_sigacts->ps_refcnt, 1); 417 418 /* Initialize signal state for process 0. */ 419 siginit(p); 420 421 /* Create the file descriptor table. */ 422 fdinit_bootstrap(p, &filedesc0, cmask); 423 424 /* Create the limits structures. */ 425 plimit_init0(&limit0); 426 p->p_limit = &limit0; 427 428 /* Allocate a prototype map so we have something to fork. */ 429 pmap_pinit0(vmspace_pmap(&vmspace0)); 430 p->p_vmspace = &vmspace0; 431 lp->lwp_vmspace = p->p_vmspace; 432 sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class); 433 vm_map_init(&vmspace0.vm_map, 434 round_page(VM_MIN_USER_ADDRESS), 435 trunc_page(VM_MAX_USER_ADDRESS), 436 vmspace_pmap(&vmspace0)); 437 sysref_activate(&vmspace0.vm_sysref); 438 439 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 440 441 /* 442 * Charge root for one process. 443 */ 444 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 445 vm_init_limits(p); 446 } 447 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL) 448 449 static int proc0_post_callback(struct proc *p, void *data __unused); 450 451 /* ARGSUSED*/ 452 static void 453 proc0_post(void *dummy __unused) 454 { 455 struct timespec ts; 456 457 /* 458 * Now we can look at the time, having had a chance to verify the 459 * time from the file system. Pretend that proc0 started now. 460 */ 461 allproc_scan(proc0_post_callback, NULL); 462 463 /* 464 * Give the ``random'' number generator a thump. 465 * XXX: Does read_random() contain enough bits to be used here ? 466 */ 467 nanotime(&ts); 468 skrandom(ts.tv_sec ^ ts.tv_nsec); 469 } 470 471 static int 472 proc0_post_callback(struct proc *p, void *data __unused) 473 { 474 microtime(&p->p_start); 475 return(0); 476 } 477 478 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL) 479 480 /* 481 *************************************************************************** 482 **** 483 **** The following SYSINIT's and glue code should be moved to the 484 **** respective files on a per subsystem basis. 485 **** 486 *************************************************************************** 487 */ 488 489 490 /* 491 *************************************************************************** 492 **** 493 **** The following code probably belongs in another file, like 494 **** kern/init_init.c. 495 **** 496 *************************************************************************** 497 */ 498 499 /* 500 * List of paths to try when searching for "init". 501 */ 502 static char init_path[MAXPATHLEN] = 503 #ifdef INIT_PATH 504 __XSTRING(INIT_PATH); 505 #else 506 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 507 #endif 508 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 509 510 /* 511 * Start the initial user process; try exec'ing each pathname in init_path. 512 * The program is invoked with one argument containing the boot flags. 513 */ 514 static void 515 start_init(void *dummy, struct trapframe *frame) 516 { 517 vm_offset_t addr; 518 struct execve_args args; 519 int options, error; 520 char *var, *path, *next, *s; 521 char *ucp, **uap, *arg0, *arg1; 522 struct proc *p; 523 struct lwp *lp; 524 struct mount *mp; 525 struct vnode *vp; 526 char *env; 527 528 /* 529 * This is passed in by the bootloader 530 */ 531 env = kgetenv("kernelname"); 532 if (env != NULL) 533 strlcpy(kernelname, env, sizeof(kernelname)); 534 535 /* 536 * The MP lock is not held on entry. We release it before 537 * returning to userland. 538 */ 539 get_mplock(); 540 p = curproc; 541 542 lp = ONLY_LWP_IN_PROC(p); 543 544 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 545 mp = mountlist_boot_getfirst(); 546 if (VFS_ROOT(mp, &vp)) 547 panic("cannot find root vnode"); 548 if (mp->mnt_ncmountpt.ncp == NULL) { 549 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 550 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 551 } 552 p->p_fd->fd_cdir = vp; 553 vref(p->p_fd->fd_cdir); 554 p->p_fd->fd_rdir = vp; 555 vref(p->p_fd->fd_rdir); 556 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 557 vn_unlock(vp); /* leave ref intact */ 558 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 559 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 560 561 kprintf("Mounting devfs\n"); 562 vfs_mountroot_devfs(); 563 564 /* 565 * Need just enough stack to hold the faked-up "execve()" arguments. 566 */ 567 addr = trunc_page(USRSTACK - PAGE_SIZE); 568 error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, 569 PAGE_SIZE, PAGE_SIZE, 570 FALSE, VM_MAPTYPE_NORMAL, 571 VM_PROT_ALL, VM_PROT_ALL, 572 0); 573 if (error) 574 panic("init: couldn't allocate argument space"); 575 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 576 p->p_vmspace->vm_ssize = 1; 577 578 if ((var = kgetenv("init_path")) != NULL) { 579 strncpy(init_path, var, sizeof init_path); 580 init_path[sizeof init_path - 1] = 0; 581 } 582 if ((var = kgetenv("kern.fallback_elf_brand")) != NULL) 583 fallback_elf_brand = strtol(var, NULL, 0); 584 585 for (path = init_path; *path != '\0'; path = next) { 586 while (*path == ':') 587 path++; 588 if (*path == '\0') 589 break; 590 for (next = path; *next != '\0' && *next != ':'; next++) 591 /* nothing */ ; 592 if (bootverbose) 593 kprintf("start_init: trying %.*s\n", (int)(next - path), 594 path); 595 596 /* 597 * Move out the boot flag argument. 598 */ 599 options = 0; 600 ucp = (char *)USRSTACK; 601 (void)subyte(--ucp, 0); /* trailing zero */ 602 if (boothowto & RB_SINGLE) { 603 (void)subyte(--ucp, 's'); 604 options = 1; 605 } 606 #ifdef notyet 607 if (boothowto & RB_FASTBOOT) { 608 (void)subyte(--ucp, 'f'); 609 options = 1; 610 } 611 #endif 612 613 #ifdef BOOTCDROM 614 (void)subyte(--ucp, 'C'); 615 options = 1; 616 #endif 617 if (options == 0) 618 (void)subyte(--ucp, '-'); 619 (void)subyte(--ucp, '-'); /* leading hyphen */ 620 arg1 = ucp; 621 622 /* 623 * Move out the file name (also arg 0). 624 */ 625 (void)subyte(--ucp, 0); 626 for (s = next - 1; s >= path; s--) 627 (void)subyte(--ucp, *s); 628 arg0 = ucp; 629 630 /* 631 * Move out the arg pointers. 632 */ 633 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 634 (void)suword((caddr_t)--uap, (long)0); /* terminator */ 635 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1); 636 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0); 637 638 /* 639 * Point at the arguments. 640 */ 641 args.fname = arg0; 642 args.argv = uap; 643 args.envv = NULL; 644 645 /* 646 * Now try to exec the program. If can't for any reason 647 * other than it doesn't exist, complain. 648 * 649 * Otherwise, return via fork_trampoline() all the way 650 * to user mode as init! 651 * 652 * WARNING! We may have been moved to another cpu after 653 * acquiring the current user process designation. The 654 * MP lock will migrate with us though so we still have to 655 * release it. 656 */ 657 if ((error = sys_execve(&args)) == 0) { 658 rel_mplock(); 659 lp->lwp_proc->p_usched->acquire_curproc(lp); 660 return; 661 } 662 if (error != ENOENT) 663 kprintf("exec %.*s: error %d\n", (int)(next - path), 664 path, error); 665 } 666 kprintf("init: not found in path %s\n", init_path); 667 panic("no init"); 668 } 669 670 /* 671 * Like kthread_create(), but runs in it's own address space. 672 * We do this early to reserve pid 1. 673 * 674 * Note special case - do not make it runnable yet. Other work 675 * in progress will change this more. 676 */ 677 static void 678 create_init(const void *udata __unused) 679 { 680 int error; 681 struct lwp *lp; 682 683 crit_enter(); 684 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 685 if (error) 686 panic("cannot fork init: %d", error); 687 initproc->p_flag |= P_SYSTEM; 688 lp = ONLY_LWP_IN_PROC(initproc); 689 cpu_set_fork_handler(lp, start_init, NULL); 690 crit_exit(); 691 } 692 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL) 693 694 /* 695 * Make it runnable now. 696 */ 697 static void 698 kick_init(const void *udata __unused) 699 { 700 start_forked_proc(&lwp0, initproc); 701 } 702 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL) 703 704 /* 705 * Machine independant globaldata initialization 706 * 707 * WARNING! Called from early boot, 'mycpu' may not work yet. 708 */ 709 void 710 mi_gdinit(struct globaldata *gd, int cpuid) 711 { 712 TAILQ_INIT(&gd->gd_systimerq); 713 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 714 gd->gd_cpuid = cpuid; 715 gd->gd_cpumask = CPUMASK(cpuid); 716 lwkt_gdinit(gd); 717 vm_map_entry_reserve_cpu_init(gd); 718 sleep_gdinit(gd); 719 usched_global_cpumask |= CPUMASK(cpuid); 720 } 721 722