1 /* $NetBSD: init_main.c,v 1.411 2009/11/27 16:43:51 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 31 * The Regents of the University of California. All rights reserved. 32 * (c) UNIX System Laboratories, Inc. 33 * All or some portions of this file are derived from material licensed 34 * to the University of California by American Telephone and Telegraph 35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 36 * the permission of UNIX System Laboratories, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 63 */ 64 65 /* 66 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. All advertising materials mentioning features or use of this software 77 * must display the following acknowledgement: 78 * This product includes software developed by the University of 79 * California, Berkeley and its contributors. 80 * 4. Neither the name of the University nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 * 96 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 97 */ 98 99 #include <sys/cdefs.h> 100 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.411 2009/11/27 16:43:51 pooka Exp $"); 101 102 #include "opt_ddb.h" 103 #include "opt_ipsec.h" 104 #include "opt_modular.h" 105 #include "opt_ntp.h" 106 #include "opt_pipe.h" 107 #include "opt_sa.h" 108 #include "opt_syscall_debug.h" 109 #include "opt_sysv.h" 110 #include "opt_fileassoc.h" 111 #include "opt_ktrace.h" 112 #include "opt_pax.h" 113 #include "opt_compat_netbsd.h" 114 #include "opt_wapbl.h" 115 #include "opt_ptrace.h" 116 117 #include "drvctl.h" 118 #include "ksyms.h" 119 #include "rnd.h" 120 #include "sysmon_envsys.h" 121 #include "sysmon_power.h" 122 #include "sysmon_taskq.h" 123 #include "sysmon_wdog.h" 124 #include "veriexec.h" 125 126 #include <sys/param.h> 127 #include <sys/acct.h> 128 #include <sys/filedesc.h> 129 #include <sys/file.h> 130 #include <sys/errno.h> 131 #include <sys/callout.h> 132 #include <sys/cpu.h> 133 #include <sys/spldebug.h> 134 #include <sys/kernel.h> 135 #include <sys/mount.h> 136 #include <sys/proc.h> 137 #include <sys/kthread.h> 138 #include <sys/resourcevar.h> 139 #include <sys/signalvar.h> 140 #include <sys/systm.h> 141 #include <sys/vnode.h> 142 #include <sys/fstrans.h> 143 #include <sys/tty.h> 144 #include <sys/conf.h> 145 #include <sys/disklabel.h> 146 #include <sys/buf.h> 147 #include <sys/device.h> 148 #include <sys/exec.h> 149 #include <sys/socketvar.h> 150 #include <sys/protosw.h> 151 #include <sys/percpu.h> 152 #include <sys/pset.h> 153 #include <sys/sysctl.h> 154 #include <sys/reboot.h> 155 #include <sys/user.h> 156 #include <sys/sysctl.h> 157 #include <sys/event.h> 158 #include <sys/mbuf.h> 159 #include <sys/sched.h> 160 #include <sys/sleepq.h> 161 #include <sys/iostat.h> 162 #include <sys/vmem.h> 163 #include <sys/uuid.h> 164 #include <sys/extent.h> 165 #include <sys/disk.h> 166 #include <sys/msgbuf.h> 167 #include <sys/module.h> 168 #include <sys/event.h> 169 #include <sys/lockf.h> 170 #include <sys/once.h> 171 #include <sys/ksyms.h> 172 #include <sys/uidinfo.h> 173 #include <sys/kprintf.h> 174 #ifdef FAST_IPSEC 175 #include <netipsec/ipsec.h> 176 #endif 177 #ifdef SYSVSHM 178 #include <sys/shm.h> 179 #endif 180 #ifdef SYSVSEM 181 #include <sys/sem.h> 182 #endif 183 #ifdef SYSVMSG 184 #include <sys/msg.h> 185 #endif 186 #include <sys/domain.h> 187 #include <sys/namei.h> 188 #if NRND > 0 189 #include <sys/rnd.h> 190 #endif 191 #include <sys/pipe.h> 192 #if NVERIEXEC > 0 193 #include <sys/verified_exec.h> 194 #endif /* NVERIEXEC > 0 */ 195 #ifdef KTRACE 196 #include <sys/ktrace.h> 197 #endif 198 #include <sys/kauth.h> 199 #ifdef WAPBL 200 #include <sys/wapbl.h> 201 #endif 202 #ifdef KERN_SA 203 #include <sys/savar.h> 204 #endif 205 #include <net80211/ieee80211_netbsd.h> 206 #ifdef PTRACE 207 #include <sys/ptrace.h> 208 #endif /* PTRACE */ 209 210 #include <sys/syscall.h> 211 #include <sys/syscallargs.h> 212 213 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 214 #include <sys/pax.h> 215 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 216 217 #include <ufs/ufs/quota.h> 218 219 #include <miscfs/genfs/genfs.h> 220 #include <miscfs/syncfs/syncfs.h> 221 #include <miscfs/specfs/specdev.h> 222 223 #include <sys/cpu.h> 224 225 #include <uvm/uvm.h> 226 227 #if NSYSMON_TASKQ > 0 228 #include <dev/sysmon/sysmon_taskq.h> 229 #endif 230 231 #include <dev/cons.h> 232 233 #if NSYSMON_ENVSYS > 0 || NSYSMON_POWER > 0 || NSYSMON_WDOG > 0 234 #include <dev/sysmon/sysmonvar.h> 235 #endif 236 237 #include <net/if.h> 238 #include <net/raw_cb.h> 239 240 #include <prop/proplib.h> 241 242 #ifdef COMPAT_50 243 #include <compat/sys/time.h> 244 struct timeval50 boottime50; 245 #endif 246 247 #ifdef _KERNEL_OPT 248 #include "opt_userconf.h" 249 #endif 250 #ifdef USERCONF 251 #include <sys/userconf.h> 252 #endif 253 254 extern struct proc proc0; 255 extern struct lwp lwp0; 256 extern time_t rootfstime; 257 258 #ifndef curlwp 259 struct lwp *curlwp = &lwp0; 260 #endif 261 struct proc *initproc; 262 263 struct vnode *rootvp, *swapdev_vp; 264 int boothowto; 265 int cold = 1; /* still working on startup */ 266 struct timespec boottime; /* time at system startup - will only follow settime deltas */ 267 268 int start_init_exec; /* semaphore for start_init() */ 269 270 static void check_console(struct lwp *l); 271 static void start_init(void *); 272 static void configure(void); 273 static void configure2(void); 274 void main(void); 275 276 /* 277 * System startup; initialize the world, create process 0, mount root 278 * filesystem, and fork to create init and pagedaemon. Most of the 279 * hard work is done in the lower-level initialization routines including 280 * startup(), which does memory initialization and autoconfiguration. 281 */ 282 void 283 main(void) 284 { 285 struct timespec time; 286 struct lwp *l; 287 struct proc *p; 288 int s, error; 289 #ifdef NVNODE_IMPLICIT 290 int usevnodes; 291 #endif 292 CPU_INFO_ITERATOR cii; 293 struct cpu_info *ci; 294 295 l = &lwp0; 296 #ifndef LWP0_CPU_INFO 297 l->l_cpu = curcpu(); 298 #endif 299 l->l_pflag |= LP_RUNNING; 300 301 /* 302 * Attempt to find console and initialize 303 * in case of early panic or other messages. 304 */ 305 consinit(); 306 307 kernel_lock_init(); 308 once_init(); 309 mutex_init(&cpu_lock, MUTEX_DEFAULT, IPL_NONE); 310 311 /* Initialize the device switch tables. */ 312 devsw_init(); 313 314 uvm_init(); 315 316 prop_kern_init(); 317 318 #if ((NKSYMS > 0) || (NDDB > 0) || (NMODULAR > 0)) 319 ksyms_init(); 320 #endif 321 kprintf_init(); 322 323 percpu_init(); 324 325 /* Initialize lock caches. */ 326 mutex_obj_init(); 327 rw_obj_init(); 328 329 /* Initialize the extent manager. */ 330 extent_init(); 331 332 /* Do machine-dependent initialization. */ 333 cpu_startup(); 334 335 /* Initialize the sysctl subsystem. */ 336 sysctl_init(); 337 338 /* Initialize callouts, part 1. */ 339 callout_startup(); 340 341 /* Initialize the kernel authorization subsystem. */ 342 kauth_init(); 343 344 spec_init(); 345 346 /* Start module system. */ 347 module_init(); 348 349 /* 350 * Initialize the kernel authorization subsystem and start the 351 * default security model, if any. We need to do this early 352 * enough so that subsystems relying on any of the aforementioned 353 * can work properly. Since the security model may dictate the 354 * credential inheritance policy, it is needed at least before 355 * any process is created, specifically proc0. 356 */ 357 module_init_class(MODULE_CLASS_SECMODEL); 358 359 /* Initialize the buffer cache */ 360 bufinit(); 361 362 /* Initialize sockets. */ 363 soinit(); 364 365 /* 366 * The following things must be done before autoconfiguration. 367 */ 368 evcnt_init(); /* initialize event counters */ 369 #if NRND > 0 370 rnd_init(); /* initialize random number generator */ 371 #endif 372 373 /* Initialize process and pgrp structures. */ 374 #ifdef KERN_SA 375 sa_init(); 376 #endif 377 procinit(); 378 lwpinit(); 379 380 /* Initialize signal-related data structures. */ 381 signal_init(); 382 383 /* Initialize resource management. */ 384 resource_init(); 385 386 /* Create process 0. */ 387 proc0_init(); 388 389 /* Disable preemption during boot. */ 390 kpreempt_disable(); 391 392 /* Initialize the UID hash table. */ 393 uid_init(); 394 395 /* Charge root for one process. */ 396 (void)chgproccnt(0, 1); 397 398 /* Initialize timekeeping. */ 399 time_init(); 400 401 /* Initialize the run queues, turnstiles and sleep queues. */ 402 sched_rqinit(); 403 turnstile_init(); 404 sleeptab_init(&sleeptab); 405 406 sched_init(); 407 408 /* Initialize processor-sets */ 409 psets_init(); 410 411 /* MI initialization of the boot cpu */ 412 error = mi_cpu_attach(curcpu()); 413 KASSERT(error == 0); 414 415 /* Initialize timekeeping, part 2. */ 416 time_init2(); 417 418 /* 419 * Initialize mbuf's. Do this now because we might attempt to 420 * allocate mbufs or mbuf clusters during autoconfiguration. 421 */ 422 mbinit(); 423 424 /* Initialize I/O statistics. */ 425 iostat_init(); 426 427 /* Initialize the log device. */ 428 loginit(); 429 430 /* Second part of module system initialization. */ 431 module_init2(); 432 433 /* Initialize the file systems. */ 434 #ifdef NVNODE_IMPLICIT 435 /* 436 * If maximum number of vnodes in namei vnode cache is not explicitly 437 * defined in kernel config, adjust the number such as we use roughly 438 * 10% of memory for vnodes and associated data structures in the 439 * assumed worst case. Do not provide fewer than NVNODE vnodes. 440 */ 441 usevnodes = 442 calc_cache_size(kernel_map, 10, VNODE_VA_MAXPCT) / VNODE_COST; 443 if (usevnodes > desiredvnodes) 444 desiredvnodes = usevnodes; 445 #endif 446 vfsinit(); 447 lf_init(); 448 449 /* Initialize fstrans. */ 450 fstrans_init(); 451 452 /* Initialize the file descriptor system. */ 453 fd_sys_init(); 454 455 /* Initialize cwd structures */ 456 cwd_sys_init(); 457 458 /* Initialize kqueue. */ 459 kqueue_init(); 460 461 /* Initialize the system monitor subsystems. */ 462 #if NSYSMON_TASKQ > 0 463 sysmon_task_queue_preinit(); 464 #endif 465 466 #if NSYSMON_ENVSYS > 0 467 sysmon_envsys_init(); 468 #endif 469 470 #if NSYSMON_POWER > 0 471 sysmon_power_init(); 472 #endif 473 474 #if NSYSMON_WDOG > 0 475 sysmon_wdog_init(); 476 #endif 477 478 inittimecounter(); 479 ntp_init(); 480 481 /* Initialize tty subsystem. */ 482 tty_init(); 483 ttyldisc_init(); 484 485 /* Initialize the buffer cache, part 2. */ 486 bufinit2(); 487 488 /* Initialize the disk wedge subsystem. */ 489 dkwedge_init(); 490 491 /* Initialize interfaces. */ 492 ifinit1(); 493 494 spldebug_start(); 495 496 /* Configure the system hardware. This will enable interrupts. */ 497 configure(); 498 499 ssp_init(); 500 501 configure2(); 502 /* Now timer is working. Enable preemption. */ 503 kpreempt_enable(); 504 505 ubc_init(); /* must be after autoconfig */ 506 507 #ifdef SYSVSHM 508 /* Initialize System V style shared memory. */ 509 shminit(); 510 #endif 511 512 #ifdef SYSVSEM 513 /* Initialize System V style semaphores. */ 514 seminit(); 515 #endif 516 517 #ifdef SYSVMSG 518 /* Initialize System V style message queues. */ 519 msginit(); 520 #endif 521 522 #if NVERIEXEC > 0 523 /* 524 * Initialise the Veriexec subsystem. 525 */ 526 veriexec_init(); 527 #endif /* NVERIEXEC > 0 */ 528 529 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) || defined(PAX_ASLR) 530 pax_init(); 531 #endif /* PAX_MPROTECT || PAX_SEGVGUARD || PAX_ASLR */ 532 533 #ifdef FAST_IPSEC 534 /* Attach network crypto subsystem */ 535 ipsec_attach(); 536 #endif 537 538 /* 539 * Initialize protocols. Block reception of incoming packets 540 * until everything is ready. 541 */ 542 s = splnet(); 543 ifinit(); 544 domaininit(true); 545 if_attachdomain(); 546 splx(s); 547 548 #ifdef GPROF 549 /* Initialize kernel profiling. */ 550 kmstartup(); 551 #endif 552 553 /* Initialize system accounting. */ 554 acct_init(); 555 556 #ifndef PIPE_SOCKETPAIR 557 /* Initialize pipes. */ 558 pipe_init(); 559 #endif 560 561 #ifdef KTRACE 562 /* Initialize ktrace. */ 563 ktrinit(); 564 #endif 565 566 #ifdef PTRACE 567 /* Initialize ptrace. */ 568 ptrace_init(); 569 #endif /* PTRACE */ 570 571 /* Initialize the UUID system calls. */ 572 uuid_init(); 573 574 #ifdef WAPBL 575 /* Initialize write-ahead physical block logging. */ 576 wapbl_init(); 577 #endif 578 579 machdep_init(); 580 581 /* 582 * Create process 1 (init(8)). We do this now, as Unix has 583 * historically had init be process 1, and changing this would 584 * probably upset a lot of people. 585 * 586 * Note that process 1 won't immediately exec init(8), but will 587 * wait for us to inform it that the root file system has been 588 * mounted. 589 */ 590 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 591 panic("fork init"); 592 593 /* 594 * Load any remaining builtin modules, and hand back temporary 595 * storage to the VM system. 596 */ 597 module_init_class(MODULE_CLASS_ANY); 598 599 /* 600 * Finalize configuration now that all real devices have been 601 * found. This needs to be done before the root device is 602 * selected, since finalization may create the root device. 603 */ 604 config_finalize(); 605 606 sysctl_finalize(); 607 608 /* 609 * Now that autoconfiguration has completed, we can determine 610 * the root and dump devices. 611 */ 612 cpu_rootconf(); 613 cpu_dumpconf(); 614 615 /* Mount the root file system. */ 616 do { 617 domountroothook(); 618 if ((error = vfs_mountroot())) { 619 printf("cannot mount root, error = %d\n", error); 620 boothowto |= RB_ASKNAME; 621 setroot(root_device, 622 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 623 } 624 } while (error != 0); 625 mountroothook_destroy(); 626 627 /* 628 * Initialise the time-of-day clock, passing the time recorded 629 * in the root filesystem (if any) for use by systems that 630 * don't have a non-volatile time-of-day device. 631 */ 632 inittodr(rootfstime); 633 634 /* 635 * Now can look at time, having had a chance to verify the time 636 * from the file system. Reset l->l_rtime as it may have been 637 * munched in mi_switch() after the time got set. 638 */ 639 getnanotime(&time); 640 boottime = time; 641 #ifdef COMPAT_50 642 { 643 struct timeval tv; 644 TIMESPEC_TO_TIMEVAL(&tv, &time); 645 timeval_to_timeval50(&tv, &boottime50); 646 } 647 #endif 648 mutex_enter(proc_lock); 649 LIST_FOREACH(p, &allproc, p_list) { 650 KASSERT((p->p_flag & PK_MARKER) == 0); 651 mutex_enter(p->p_lock); 652 TIMESPEC_TO_TIMEVAL(&p->p_stats->p_start, &time); 653 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 654 lwp_lock(l); 655 memset(&l->l_rtime, 0, sizeof(l->l_rtime)); 656 lwp_unlock(l); 657 } 658 mutex_exit(p->p_lock); 659 } 660 mutex_exit(proc_lock); 661 binuptime(&curlwp->l_stime); 662 663 for (CPU_INFO_FOREACH(cii, ci)) { 664 ci->ci_schedstate.spc_lastmod = time_second; 665 } 666 667 /* Create the pageout daemon kernel thread. */ 668 uvm_swap_init(); 669 if (kthread_create(PRI_PGDAEMON, KTHREAD_MPSAFE, NULL, uvm_pageout, 670 NULL, NULL, "pgdaemon")) 671 panic("fork pagedaemon"); 672 673 /* Create the filesystem syncer kernel thread. */ 674 if (kthread_create(PRI_IOFLUSH, KTHREAD_MPSAFE, NULL, sched_sync, 675 NULL, NULL, "ioflush")) 676 panic("fork syncer"); 677 678 /* Create the aiodone daemon kernel thread. */ 679 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 680 uvm_aiodone_worker, NULL, PRI_VM, IPL_NONE, WQ_MPSAFE)) 681 panic("fork aiodoned"); 682 683 vmem_rehash_start(); 684 685 /* Initialize exec structures */ 686 exec_init(1); 687 688 /* 689 * Okay, now we can let init(8) exec! It's off to userland! 690 */ 691 mutex_enter(proc_lock); 692 start_init_exec = 1; 693 cv_broadcast(&lbolt); 694 mutex_exit(proc_lock); 695 696 /* The scheduler is an infinite loop. */ 697 uvm_scheduler(); 698 /* NOTREACHED */ 699 } 700 701 /* 702 * Configure the system's hardware. 703 */ 704 static void 705 configure(void) 706 { 707 708 /* Initialize autoconf data structures. */ 709 config_init_mi(); 710 /* 711 * XXX 712 * callout_setfunc() requires mutex(9) so it can't be in config_init() 713 * on amiga and atari which use config_init() and autoconf(9) fucntions 714 * to initialize console devices. 715 */ 716 config_twiddle_init(); 717 718 pmf_init(); 719 #if NDRVCTL > 0 720 drvctl_init(); 721 #endif 722 723 #ifdef USERCONF 724 if (boothowto & RB_USERCONF) 725 user_config(); 726 #endif 727 728 if ((boothowto & (AB_SILENT|AB_VERBOSE)) == AB_SILENT) { 729 printf_nolog("Detecting hardware..."); 730 } 731 732 /* 733 * Do the machine-dependent portion of autoconfiguration. This 734 * sets the configuration machinery here in motion by "finding" 735 * the root bus. When this function returns, we expect interrupts 736 * to be enabled. 737 */ 738 cpu_configure(); 739 } 740 741 static void 742 configure2(void) 743 { 744 CPU_INFO_ITERATOR cii; 745 struct cpu_info *ci; 746 int s; 747 748 /* 749 * Now that we've found all the hardware, start the real time 750 * and statistics clocks. 751 */ 752 initclocks(); 753 754 cold = 0; /* clocks are running, we're warm now! */ 755 s = splsched(); 756 curcpu()->ci_schedstate.spc_flags |= SPCF_RUNNING; 757 splx(s); 758 759 /* Boot the secondary processors. */ 760 for (CPU_INFO_FOREACH(cii, ci)) { 761 uvm_cpu_attach(ci); 762 } 763 mp_online = true; 764 #if defined(MULTIPROCESSOR) 765 cpu_boot_secondary_processors(); 766 #endif 767 768 /* Setup the runqueues and scheduler. */ 769 runq_init(); 770 synch_init(); 771 772 /* 773 * Bus scans can make it appear as if the system has paused, so 774 * twiddle constantly while config_interrupts() jobs are running. 775 */ 776 config_twiddle_fn(NULL); 777 778 /* 779 * Create threads to call back and finish configuration for 780 * devices that want interrupts enabled. 781 */ 782 config_create_interruptthreads(); 783 784 /* Get the threads going and into any sleeps before continuing. */ 785 yield(); 786 } 787 788 static void 789 check_console(struct lwp *l) 790 { 791 struct vnode *vp; 792 int error; 793 794 error = namei_simple_kernel("/dev/console", 795 NSM_FOLLOW_NOEMULROOT, &vp); 796 if (error == 0) 797 vrele(vp); 798 else if (error == ENOENT) 799 printf("warning: no /dev/console\n"); 800 else 801 printf("warning: lookup /dev/console: error %d\n", error); 802 } 803 804 /* 805 * List of paths to try when searching for "init". 806 */ 807 static const char * const initpaths[] = { 808 "/sbin/init", 809 "/sbin/oinit", 810 "/sbin/init.bak", 811 NULL, 812 }; 813 814 /* 815 * Start the initial user process; try exec'ing each pathname in "initpaths". 816 * The program is invoked with one argument containing the boot flags. 817 */ 818 static void 819 start_init(void *arg) 820 { 821 struct lwp *l = arg; 822 struct proc *p = l->l_proc; 823 vaddr_t addr; 824 struct sys_execve_args /* { 825 syscallarg(const char *) path; 826 syscallarg(char * const *) argp; 827 syscallarg(char * const *) envp; 828 } */ args; 829 int options, i, error; 830 register_t retval[2]; 831 char flags[4], *flagsp; 832 const char *path, *slash; 833 char *ucp, **uap, *arg0, *arg1 = NULL; 834 char ipath[129]; 835 int ipx, len; 836 837 /* 838 * Now in process 1. 839 */ 840 strncpy(p->p_comm, "init", MAXCOMLEN); 841 842 /* 843 * Wait for main() to tell us that it's safe to exec. 844 */ 845 mutex_enter(proc_lock); 846 while (start_init_exec == 0) 847 cv_wait(&lbolt, proc_lock); 848 mutex_exit(proc_lock); 849 850 /* 851 * This is not the right way to do this. We really should 852 * hand-craft a descriptor onto /dev/console to hand to init, 853 * but that's a _lot_ more work, and the benefit from this easy 854 * hack makes up for the "good is the enemy of the best" effect. 855 */ 856 check_console(l); 857 858 /* 859 * Need just enough stack to hold the faked-up "execve()" arguments. 860 */ 861 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 862 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 863 NULL, UVM_UNKNOWN_OFFSET, 0, 864 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 865 UVM_ADV_NORMAL, 866 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 867 panic("init: couldn't allocate argument space"); 868 p->p_vmspace->vm_maxsaddr = (void *)STACK_MAX(addr, PAGE_SIZE); 869 870 ipx = 0; 871 while (1) { 872 if (boothowto & RB_ASKNAME) { 873 printf("init path"); 874 if (initpaths[ipx]) 875 printf(" (default %s)", initpaths[ipx]); 876 printf(": "); 877 len = cngetsn(ipath, sizeof(ipath)-1); 878 if (len == 4 && strcmp(ipath, "halt") == 0) { 879 cpu_reboot(RB_HALT, NULL); 880 } else if (len == 6 && strcmp(ipath, "reboot") == 0) { 881 cpu_reboot(0, NULL); 882 #if defined(DDB) 883 } else if (len == 3 && strcmp(ipath, "ddb") == 0) { 884 console_debugger(); 885 continue; 886 #endif 887 } else if (len > 0 && ipath[0] == '/') { 888 ipath[len] = '\0'; 889 path = ipath; 890 } else if (len == 0 && initpaths[ipx] != NULL) { 891 path = initpaths[ipx++]; 892 } else { 893 printf("use absolute path, "); 894 #if defined(DDB) 895 printf("\"ddb\", "); 896 #endif 897 printf("\"halt\", or \"reboot\"\n"); 898 continue; 899 } 900 } else { 901 if ((path = initpaths[ipx++]) == NULL) { 902 ipx = 0; 903 boothowto |= RB_ASKNAME; 904 continue; 905 } 906 } 907 908 ucp = (char *)USRSTACK; 909 910 /* 911 * Construct the boot flag argument. 912 */ 913 flagsp = flags; 914 *flagsp++ = '-'; 915 options = 0; 916 917 if (boothowto & RB_SINGLE) { 918 *flagsp++ = 's'; 919 options = 1; 920 } 921 #ifdef notyet 922 if (boothowto & RB_FASTBOOT) { 923 *flagsp++ = 'f'; 924 options = 1; 925 } 926 #endif 927 928 /* 929 * Move out the flags (arg 1), if necessary. 930 */ 931 if (options != 0) { 932 *flagsp++ = '\0'; 933 i = flagsp - flags; 934 #ifdef DEBUG 935 printf("init: copying out flags `%s' %d\n", flags, i); 936 #endif 937 arg1 = STACK_ALLOC(ucp, i); 938 ucp = STACK_MAX(arg1, i); 939 (void)copyout((void *)flags, arg1, i); 940 } 941 942 /* 943 * Move out the file name (also arg 0). 944 */ 945 i = strlen(path) + 1; 946 #ifdef DEBUG 947 printf("init: copying out path `%s' %d\n", path, i); 948 #else 949 if (boothowto & RB_ASKNAME || path != initpaths[0]) 950 printf("init: trying %s\n", path); 951 #endif 952 arg0 = STACK_ALLOC(ucp, i); 953 ucp = STACK_MAX(arg0, i); 954 (void)copyout(path, arg0, i); 955 956 /* 957 * Move out the arg pointers. 958 */ 959 ucp = (void *)STACK_ALIGN(ucp, ALIGNBYTES); 960 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 961 SCARG(&args, path) = arg0; 962 SCARG(&args, argp) = uap; 963 SCARG(&args, envp) = NULL; 964 slash = strrchr(path, '/'); 965 if (slash) 966 (void)suword((void *)uap++, 967 (long)arg0 + (slash + 1 - path)); 968 else 969 (void)suword((void *)uap++, (long)arg0); 970 if (options != 0) 971 (void)suword((void *)uap++, (long)arg1); 972 (void)suword((void *)uap++, 0); /* terminator */ 973 974 /* 975 * Now try to exec the program. If can't for any reason 976 * other than it doesn't exist, complain. 977 */ 978 error = sys_execve(l, &args, retval); 979 if (error == 0 || error == EJUSTRETURN) { 980 KERNEL_UNLOCK_LAST(l); 981 return; 982 } 983 printf("exec %s: error %d\n", path, error); 984 } 985 printf("init: not found\n"); 986 panic("no init"); 987 } 988 989 /* 990 * calculate cache size from physmem and vm_map size. 991 */ 992 vaddr_t 993 calc_cache_size(struct vm_map *map, int pct, int va_pct) 994 { 995 paddr_t t; 996 997 /* XXX should consider competing cache if any */ 998 /* XXX should consider submaps */ 999 t = (uintmax_t)physmem * pct / 100 * PAGE_SIZE; 1000 if (map != NULL) { 1001 vsize_t vsize; 1002 1003 vsize = vm_map_max(map) - vm_map_min(map); 1004 vsize = (uintmax_t)vsize * va_pct / 100; 1005 if (t > vsize) { 1006 t = vsize; 1007 } 1008 } 1009 return t; 1010 } 1011 1012 /* 1013 * Print the system start up banner. 1014 * 1015 * - Print a limited banner if AB_SILENT. 1016 * - Always send normal banner to the log. 1017 */ 1018 #define MEM_PBUFSIZE sizeof("99999 MB") 1019 1020 void 1021 banner(void) 1022 { 1023 static char notice[] = " Notice: this software is " 1024 "protected by copyright"; 1025 char pbuf[81]; 1026 void (*pr)(const char *, ...); 1027 int i; 1028 1029 if ((boothowto & AB_SILENT) != 0) { 1030 snprintf(pbuf, sizeof(pbuf), "%s %s (%s)", 1031 ostype, osrelease, kernel_ident); 1032 printf_nolog("%s", pbuf); 1033 for (i = 80 - strlen(pbuf) - sizeof(notice); i > 0; i--) 1034 printf(" "); 1035 printf_nolog("%s\n", notice); 1036 pr = aprint_normal; 1037 } else { 1038 pr = printf; 1039 } 1040 1041 memset(pbuf, 0, sizeof(pbuf)); 1042 (*pr)("%s%s", copyright, version); 1043 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)physmem)); 1044 (*pr)("total memory = %s\n", pbuf); 1045 format_bytes(pbuf, MEM_PBUFSIZE, ctob((uint64_t)uvmexp.free)); 1046 (*pr)("avail memory = %s\n", pbuf); 1047 } 1048