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. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 38 * $FreeBSD: src/sys/kern/init_main.c,v 1.134.2.8 2003/06/06 20:21:32 tegge Exp $ 39 */ 40 41 #include "opt_init_path.h" 42 43 #include <sys/param.h> 44 #include <sys/file.h> 45 #include <sys/filedesc.h> 46 #include <sys/kernel.h> 47 #include <sys/mount.h> 48 #include <sys/sysctl.h> 49 #include <sys/proc.h> 50 #include <sys/resourcevar.h> 51 #include <sys/signalvar.h> 52 #include <sys/systm.h> 53 #include <sys/vnode.h> 54 #include <sys/sysent.h> 55 #include <sys/reboot.h> 56 #include <sys/sysproto.h> 57 #include <sys/vmmeter.h> 58 #include <sys/unistd.h> 59 #include <sys/malloc.h> 60 #include <sys/machintr.h> 61 62 #include <sys/refcount.h> 63 #include <sys/file2.h> 64 #include <sys/thread2.h> 65 #include <sys/spinlock2.h> 66 67 #include <machine/cpu.h> 68 69 #include <vm/vm.h> 70 #include <vm/vm_param.h> 71 #include <sys/lock.h> 72 #include <vm/pmap.h> 73 #include <vm/vm_map.h> 74 #include <vm/vm_extern.h> 75 #include <sys/user.h> 76 #include <sys/copyright.h> 77 78 int vfs_mountroot_devfs(void); 79 80 /* Components of the first process -- never freed. */ 81 static struct session session0; 82 static struct pgrp pgrp0; 83 static struct sigacts sigacts0; 84 static struct filedesc filedesc0; 85 static struct plimit limit0; 86 static struct vmspace vmspace0; 87 struct proc *initproc; 88 struct proc proc0; 89 struct lwp lwp0; 90 struct thread thread0; 91 struct sys_kpmap *kpmap; 92 struct sysreaper initreaper; 93 94 int cmask = CMASK; 95 u_int cpu_mi_feature; 96 cpumask_t usched_global_cpumask; 97 extern struct user *proc0paddr; 98 99 int boothowto = 0; /* initialized so that it can be patched */ 100 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, 101 "Reboot flags, from console subsystem"); 102 SYSCTL_OPAQUE(_kern, OID_AUTO, usched_global_cpumask, CTLFLAG_RW, 103 &usched_global_cpumask, sizeof(usched_global_cpumask), "LU", 104 "global user scheduler cpumask"); 105 106 /* 107 * This ensures that there is at least one entry so that the sysinit_set 108 * symbol is not undefined. A subsystem ID of SI_SPECIAL_DUMMY is never 109 * executed. 110 */ 111 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL); 112 113 /* 114 * The sysinit table itself. Items are checked off as the are run. 115 * If we want to register new sysinit types, add them to newsysinit. 116 */ 117 SET_DECLARE(sysinit_set, struct sysinit); 118 struct sysinit **sysinit, **sysinit_end; 119 struct sysinit **newsysinit, **newsysinit_end; 120 121 122 /* 123 * Merge a new sysinit set into the current set, reallocating it if 124 * necessary. This can only be called after malloc is running. 125 */ 126 void 127 sysinit_add(struct sysinit **set, struct sysinit **set_end) 128 { 129 struct sysinit **newset; 130 struct sysinit **sipp; 131 struct sysinit **xipp; 132 int count; 133 134 count = set_end - set; 135 if (newsysinit) 136 count += newsysinit_end - newsysinit; 137 else 138 count += sysinit_end - sysinit; 139 newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK); 140 xipp = newset; 141 if (newsysinit) { 142 for (sipp = newsysinit; sipp < newsysinit_end; sipp++) 143 *xipp++ = *sipp; 144 } else { 145 for (sipp = sysinit; sipp < sysinit_end; sipp++) 146 *xipp++ = *sipp; 147 } 148 for (sipp = set; sipp < set_end; sipp++) 149 *xipp++ = *sipp; 150 if (newsysinit) 151 kfree(newsysinit, M_TEMP); 152 newsysinit = newset; 153 newsysinit_end = newset + count; 154 } 155 156 /* 157 * Callbacks from machine-dependant startup code (e.g. init386) to set 158 * up low level entities related to cpu #0's globaldata. 159 * 160 * Called from very low level boot code. 161 */ 162 void 163 mi_proc0init(struct globaldata *gd, struct user *proc0paddr) 164 { 165 lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd); 166 lwkt_set_comm(&thread0, "thread0"); 167 RB_INIT(&proc0.p_lwp_tree); 168 spin_init(&proc0.p_spin, "iproc_proc0"); 169 lwkt_token_init(&proc0.p_token, "iproc"); 170 lwp0.lwp_tid = 1; 171 proc0.p_lasttid = lwp0.lwp_tid; /* +1 = next TID */ 172 lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0); 173 lwp0.lwp_thread = &thread0; 174 lwp0.lwp_proc = &proc0; 175 proc0.p_usched = usched_init(); 176 CPUMASK_ASSALLONES(lwp0.lwp_cpumask); 177 lwkt_token_init(&lwp0.lwp_token, "lwp_token"); 178 spin_init(&lwp0.lwp_spin, "iproc_lwp0"); 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(__x86_64__) && 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 = (void *)((long)(intptr_t)sysinit + 4); 217 } 218 #endif 219 sysinit_end = SET_LIMIT(sysinit_set); 220 } 221 #if defined(__x86_64__) && 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 #if 0 258 if (bootverbose) 259 kprintf("(%08x-%p)\n", sip->subsystem, sip->func); 260 #endif 261 262 /* Call function */ 263 (*(sip->func))(sip->udata); 264 265 /* Check off the one we're just done */ 266 sip->subsystem = SI_SPECIAL_DONE; 267 268 /* Check if we've installed more sysinit items via KLD */ 269 if (newsysinit != NULL) { 270 if (sysinit != SET_BEGIN(sysinit_set)) 271 kfree(sysinit, M_TEMP); 272 sysinit = newsysinit; 273 sysinit_end = newsysinit_end; 274 newsysinit = NULL; 275 newsysinit_end = NULL; 276 goto restart; 277 } 278 } 279 280 panic("Shouldn't get here!"); 281 /* NOTREACHED*/ 282 } 283 284 285 /* 286 *************************************************************************** 287 **** 288 **** The following SYSINIT's belong elsewhere, but have not yet 289 **** been moved. 290 **** 291 *************************************************************************** 292 */ 293 static void 294 print_caddr_t(void *data) 295 { 296 kprintf("%s", (char *)data); 297 } 298 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright); 299 300 /* 301 * Leave the critical section that protected us from spurious interrupts 302 * so device probes work. 303 */ 304 static void 305 leavecrit(void *dummy __unused) 306 { 307 MachIntrABI.stabilize(); 308 cpu_enable_intr(); 309 MachIntrABI.cleanup(); 310 crit_exit(); 311 KKASSERT(!IN_CRITICAL_SECT(curthread)); 312 313 if (bootverbose) 314 kprintf("Leaving critical section, allowing interrupts\n"); 315 } 316 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL); 317 318 /* 319 * This is called after the threading system is up and running, 320 * including the softclock, clock interrupts, and SMP. 321 */ 322 static void 323 tsleepworks(void *dummy __unused) 324 { 325 tsleep_now_works = 1; 326 } 327 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL); 328 329 /* 330 * This is called after devices have configured. Tell the kernel we are 331 * no longer in cold boot. 332 */ 333 static void 334 endofcoldboot(void *dummy __unused) 335 { 336 cold = 0; 337 } 338 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL); 339 340 /* 341 *************************************************************************** 342 **** 343 **** The two following SYSINT's are proc0 specific glue code. I am not 344 **** convinced that they can not be safely combined, but their order of 345 **** operation has been maintained as the same as the original init_main.c 346 **** for right now. 347 **** 348 **** These probably belong in init_proc.c or kern_proc.c, since they 349 **** deal with proc0 (the fork template process). 350 **** 351 *************************************************************************** 352 */ 353 /* ARGSUSED*/ 354 static void 355 proc0_init(void *dummy __unused) 356 { 357 struct proc *p; 358 struct lwp *lp; 359 struct uidinfo *uip; 360 361 p = &proc0; 362 lp = &lwp0; 363 364 /* 365 * Initialize osrel 366 */ 367 p->p_osrel = osreldate; 368 369 /* 370 * Initialize process and pgrp structures. 371 */ 372 procinit(); 373 374 /* 375 * additional VM structures 376 */ 377 vm_init2(); 378 379 /* 380 * Create process 0 (the swapper). 381 */ 382 procinsertinit(p); 383 pgrpinsertinit(&pgrp0); 384 LIST_INIT(&pgrp0.pg_members); 385 lwkt_token_init(&pgrp0.pg_token, "pgrp0"); 386 refcount_init(&pgrp0.pg_refs, 1); 387 lockinit(&pgrp0.pg_lock, "pgwt0", 0, 0); 388 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 389 390 pgrp0.pg_session = &session0; 391 session0.s_count = 1; 392 session0.s_leader = p; 393 sessinsertinit(&session0); 394 395 pgref(&pgrp0); 396 p->p_pgrp = &pgrp0; 397 398 p->p_sysent = &aout_sysvec; 399 400 p->p_flags = P_SYSTEM; 401 p->p_stat = SACTIVE; 402 lp->lwp_stat = LSRUN; 403 p->p_nice = NZERO; 404 p->p_rtprio.type = RTP_PRIO_NORMAL; 405 p->p_rtprio.prio = 0; 406 lp->lwp_rtprio = p->p_rtprio; 407 408 p->p_peers = NULL; 409 p->p_leader = p; 410 411 bcopy("swapper", p->p_comm, sizeof ("swapper")); 412 bcopy("swapper", thread0.td_comm, sizeof ("swapper")); 413 414 /* Create credentials. */ 415 uip = uicreate(0); /* for cr_ruidinfo */ 416 uihold(uip); /* for cr_uidinfo */ 417 p->p_ucred = crget(); 418 p->p_ucred->cr_ruidinfo = uip; 419 p->p_ucred->cr_uidinfo = uip; 420 p->p_ucred->cr_ngroups = 1; /* group 0 */ 421 thread0.td_ucred = crhold(p->p_ucred); /* bootstrap fork1() */ 422 423 /* Don't jail it */ 424 p->p_ucred->cr_prison = NULL; 425 426 /* Create sigacts. */ 427 p->p_sigacts = &sigacts0; 428 refcount_init(&p->p_sigacts->ps_refcnt, 1); 429 430 /* Initialize signal state for process 0. */ 431 siginit(p); 432 433 /* Create the file descriptor table. */ 434 fdinit_bootstrap(p, &filedesc0, cmask); 435 436 /* Create the limits structures. */ 437 plimit_init0(&limit0); 438 p->p_limit = &limit0; 439 440 /* Allocate a prototype map so we have something to fork. */ 441 pmap_pinit0(vmspace_pmap(&vmspace0)); 442 p->p_vmspace = &vmspace0; 443 lp->lwp_vmspace = p->p_vmspace; 444 vmspace_initrefs(&vmspace0); 445 vm_map_init(&vmspace0.vm_map, 446 round_page(VM_MIN_USER_ADDRESS), 447 trunc_page(VM_MAX_USER_ADDRESS), 448 vmspace_pmap(&vmspace0)); 449 450 kqueue_init(&lwp0.lwp_kqueue, &filedesc0); 451 452 /* 453 * Charge root for one process. 454 */ 455 (void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0); 456 vm_init_limits(p); 457 } 458 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL); 459 460 static int proc0_post_callback(struct proc *p, void *data __unused); 461 462 /* ARGSUSED*/ 463 static void 464 proc0_post(void *dummy __unused) 465 { 466 struct timespec ts; 467 468 /* 469 * Now we can look at the time, having had a chance to verify the 470 * time from the file system. Pretend that proc0 started now. 471 */ 472 allproc_scan(proc0_post_callback, NULL, 0); 473 474 /* 475 * Give the ``random'' number generator a thump. 476 * XXX: Does read_random() contain enough bits to be used here ? 477 */ 478 nanotime(&ts); 479 skrandom(ts.tv_sec ^ ts.tv_nsec); 480 } 481 482 static int 483 proc0_post_callback(struct proc *p, void *data __unused) 484 { 485 microtime(&p->p_start); 486 return(0); 487 } 488 489 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL); 490 491 /* 492 *************************************************************************** 493 **** 494 **** The following SYSINIT's and glue code should be moved to the 495 **** respective files on a per subsystem basis. 496 **** 497 *************************************************************************** 498 */ 499 500 501 /* 502 *************************************************************************** 503 **** 504 **** The following code probably belongs in another file, like 505 **** kern/init_init.c. 506 **** 507 *************************************************************************** 508 */ 509 510 /* 511 * List of paths to try when searching for "init". 512 */ 513 static char init_path[MAXPATHLEN] = 514 #ifdef INIT_PATH 515 __XSTRING(INIT_PATH); 516 #else 517 "/sbin/init:/sbin/oinit:/sbin/init.bak"; 518 #endif 519 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, ""); 520 521 /* 522 * Shutdown timeout of init(8). 523 * Unused within kernel, but used to control init(8), hence do not remove. 524 */ 525 #ifndef INIT_SHUTDOWN_TIMEOUT 526 #define INIT_SHUTDOWN_TIMEOUT 120 527 #endif 528 static int init_shutdown_timeout = INIT_SHUTDOWN_TIMEOUT; 529 SYSCTL_INT(_kern, OID_AUTO, init_shutdown_timeout, 530 CTLFLAG_RW, &init_shutdown_timeout, 0, "Shutdown timeout of init(8). " 531 "Unused within kernel, but used to control init(8)"); 532 533 /* 534 * Start the initial user process; try exec'ing each pathname in init_path. 535 * The program is invoked with one argument containing the boot flags. 536 */ 537 static void 538 start_init(void *dummy, struct trapframe *frame) 539 { 540 vm_offset_t addr; 541 struct execve_args args; 542 int options, error; 543 char *var, *path, *next, *s; 544 char *ucp, **uap, *arg0, *arg1; 545 struct proc *p; 546 struct lwp *lp; 547 struct mount *mp; 548 struct vnode *vp; 549 char *env; 550 551 /* 552 * This is passed in by the bootloader 553 */ 554 env = kgetenv("kernelname"); 555 if (env != NULL) 556 strlcpy(kernelname, env, sizeof(kernelname)); 557 558 p = curproc; 559 560 lp = ONLY_LWP_IN_PROC(p); 561 562 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 563 mp = mountlist_boot_getfirst(); 564 if (VFS_ROOT(mp, &vp)) 565 panic("cannot find root vnode"); 566 if (mp->mnt_ncmountpt.ncp == NULL) { 567 cache_allocroot(&mp->mnt_ncmountpt, mp, vp); 568 cache_unlock(&mp->mnt_ncmountpt); /* leave ref intact */ 569 } 570 p->p_fd->fd_cdir = vp; 571 vref(p->p_fd->fd_cdir); 572 p->p_fd->fd_rdir = vp; 573 vref(p->p_fd->fd_rdir); 574 vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt)); 575 vn_unlock(vp); /* leave ref intact */ 576 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir); 577 cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir); 578 579 kprintf("Mounting devfs\n"); 580 vfs_mountroot_devfs(); 581 582 /* 583 * Need just enough stack to hold the faked-up "execve()" arguments. 584 */ 585 addr = trunc_page(USRSTACK - PAGE_SIZE); 586 error = vm_map_find(&p->p_vmspace->vm_map, NULL, NULL, 587 0, &addr, PAGE_SIZE, 588 PAGE_SIZE, FALSE, 589 VM_MAPTYPE_NORMAL, VM_SUBSYS_INIT, 590 VM_PROT_ALL, VM_PROT_ALL, 0); 591 if (error) 592 panic("init: couldn't allocate argument space"); 593 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 594 p->p_vmspace->vm_ssize = 1; 595 596 if ((var = kgetenv("init_path")) != NULL) { 597 strncpy(init_path, var, sizeof init_path); 598 init_path[sizeof init_path - 1] = 0; 599 } 600 601 for (path = init_path; *path != '\0'; path = next) { 602 while (*path == ':') 603 path++; 604 if (*path == '\0') 605 break; 606 for (next = path; *next != '\0' && *next != ':'; next++) 607 /* nothing */ ; 608 if (bootverbose) 609 kprintf("start_init: trying %.*s\n", (int)(next - path), 610 path); 611 612 /* 613 * Move out the boot flag argument. 614 */ 615 options = 0; 616 ucp = (char *)USRSTACK; 617 (void)subyte(--ucp, 0); /* trailing zero */ 618 if (boothowto & RB_SINGLE) { 619 (void)subyte(--ucp, 's'); 620 options = 1; 621 } 622 #ifdef notyet 623 if (boothowto & RB_FASTBOOT) { 624 (void)subyte(--ucp, 'f'); 625 options = 1; 626 } 627 #endif 628 629 #ifdef BOOTCDROM 630 (void)subyte(--ucp, 'C'); 631 options = 1; 632 #endif 633 if (options == 0) 634 (void)subyte(--ucp, '-'); 635 (void)subyte(--ucp, '-'); /* leading hyphen */ 636 arg1 = ucp; 637 638 /* 639 * Move out the file name (also arg 0). 640 */ 641 (void)subyte(--ucp, 0); 642 for (s = next - 1; s >= path; s--) 643 (void)subyte(--ucp, *s); 644 arg0 = ucp; 645 646 /* 647 * Move out the arg pointers. 648 */ 649 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1)); 650 651 /* terminator */ 652 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)0); 653 654 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)(intptr_t)arg1); 655 suword64((uint64_t *)(caddr_t)--uap, (uint64_t)(intptr_t)arg0); 656 657 /* 658 * Point at the arguments. 659 */ 660 args.fname = arg0; 661 args.argv = uap; 662 args.envv = NULL; 663 664 /* 665 * Now try to exec the program. If can't for any reason 666 * other than it doesn't exist, complain. 667 * 668 * Otherwise, return via fork_trampoline() all the way 669 * to user mode as init! 670 * 671 * WARNING! We may have been moved to another cpu after 672 * acquiring the current user process designation. The 673 * MP lock will migrate with us though so we still have to 674 * release it. 675 */ 676 if ((error = sys_execve(&args)) == 0) { 677 lp->lwp_proc->p_usched->acquire_curproc(lp); 678 return; 679 } 680 if (error != ENOENT) 681 kprintf("exec %.*s: error %d\n", (int)(next - path), 682 path, error); 683 } 684 kprintf("init: not found in path %s\n", init_path); 685 panic("no init"); 686 } 687 688 /* 689 * Like kthread_create(), but runs in it's own address space. 690 * We do this early to reserve pid 1. 691 * 692 * Note special case - do not make it runnable yet. Other work 693 * in progress will change this more. 694 */ 695 static void 696 create_init(const void *udata __unused) 697 { 698 int error; 699 struct lwp *lp; 700 701 crit_enter(); 702 error = fork1(&lwp0, RFFDG | RFPROC, &initproc); 703 if (error) 704 panic("cannot fork init: %d", error); 705 initproc->p_flags |= P_SYSTEM; 706 reaper_init(initproc, &initreaper); 707 lp = ONLY_LWP_IN_PROC(initproc); 708 cpu_set_fork_handler(lp, start_init, NULL); 709 crit_exit(); 710 } 711 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL); 712 713 /* 714 * Make it runnable now. 715 */ 716 static void 717 kick_init(const void *udata __unused) 718 { 719 start_forked_proc(&lwp0, initproc); 720 } 721 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL); 722 723 static void 724 kpmap_init(const void *udata __unused) 725 { 726 kpmap = kmalloc(roundup2(sizeof(*kpmap), PAGE_SIZE), 727 M_TEMP, M_ZERO | M_WAITOK); 728 729 kpmap->header[0].type = UKPTYPE_VERSION; 730 kpmap->header[0].offset = offsetof(struct sys_kpmap, version); 731 kpmap->header[1].type = KPTYPE_UPTICKS; 732 kpmap->header[1].offset = offsetof(struct sys_kpmap, upticks); 733 kpmap->header[2].type = KPTYPE_TS_UPTIME; 734 kpmap->header[2].offset = offsetof(struct sys_kpmap, ts_uptime); 735 kpmap->header[3].type = KPTYPE_TS_REALTIME; 736 kpmap->header[3].offset = offsetof(struct sys_kpmap, ts_realtime); 737 kpmap->header[4].type = KPTYPE_TSC_FREQ; 738 kpmap->header[4].offset = offsetof(struct sys_kpmap, tsc_freq); 739 kpmap->header[5].type = KPTYPE_TICK_FREQ; 740 kpmap->header[5].offset = offsetof(struct sys_kpmap, tick_freq); 741 kpmap->version = KPMAP_VERSION; 742 } 743 SYSINIT(kpmapinit, SI_BOOT1_POST, SI_ORDER_FIRST, kpmap_init, NULL); 744 745 /* 746 * Machine independant globaldata initialization 747 * 748 * WARNING! Called from early boot, 'mycpu' may not work yet. 749 */ 750 void 751 mi_gdinit(struct globaldata *gd, int cpuid) 752 { 753 TAILQ_INIT(&gd->gd_systimerq); 754 gd->gd_sysid_alloc = cpuid; /* prime low bits for cpu lookup */ 755 gd->gd_cpuid = cpuid; 756 CPUMASK_ASSBIT(gd->gd_cpumask, cpuid); 757 gd->gd_cpumask_simple = CPUMASK_SIMPLE(cpuid); 758 gd->gd_cpumask_offset = (uintptr_t)CPUMASK_ADDR(*(cpumask_t *)0, cpuid); 759 lwkt_gdinit(gd); 760 vm_map_entry_reserve_cpu_init(gd); 761 if (gd->gd_cpuid == 0) 762 sleep_early_gdinit(gd); 763 else 764 sleep_gdinit(gd); 765 slab_gdinit(gd); 766 ATOMIC_CPUMASK_ORBIT(usched_global_cpumask, cpuid); 767 gd->gd_vmstats = vmstats; 768 } 769 770