xref: /dragonfly/sys/kern/init_main.c (revision 9f3fc534)
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 #include <sys/file2.h>
67 #include <sys/thread2.h>
68 #include <sys/sysref2.h>
69 #include <sys/spinlock2.h>
70 
71 #include <machine/cpu.h>
72 
73 #include <vm/vm.h>
74 #include <vm/vm_param.h>
75 #include <sys/lock.h>
76 #include <vm/pmap.h>
77 #include <vm/vm_map.h>
78 #include <vm/vm_extern.h>
79 #include <sys/user.h>
80 #include <sys/copyright.h>
81 
82 /* Components of the first process -- never freed. */
83 static struct session session0;
84 static struct pgrp pgrp0;
85 static struct sigacts sigacts0;
86 static struct filedesc filedesc0;
87 static struct plimit limit0;
88 static struct vmspace vmspace0;
89 struct proc *initproc;
90 struct proc proc0;
91 struct lwp lwp0;
92 struct thread thread0;
93 
94 int cmask = CMASK;
95 extern	struct user *proc0paddr;
96 extern int fallback_elf_brand;
97 
98 int	boothowto = 0;		/* initialized so that it can be patched */
99 SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
100 
101 /*
102  * This ensures that there is at least one entry so that the sysinit_set
103  * symbol is not undefined.  A subsystem ID of SI_SPECIAL_DUMMY is never
104  * executed.
105  */
106 SYSINIT(placeholder, SI_SPECIAL_DUMMY, SI_ORDER_ANY, NULL, NULL)
107 
108 /*
109  * The sysinit table itself.  Items are checked off as the are run.
110  * If we want to register new sysinit types, add them to newsysinit.
111  */
112 SET_DECLARE(sysinit_set, struct sysinit);
113 struct sysinit **sysinit, **sysinit_end;
114 struct sysinit **newsysinit, **newsysinit_end;
115 
116 
117 /*
118  * Merge a new sysinit set into the current set, reallocating it if
119  * necessary.  This can only be called after malloc is running.
120  */
121 void
122 sysinit_add(struct sysinit **set, struct sysinit **set_end)
123 {
124 	struct sysinit **newset;
125 	struct sysinit **sipp;
126 	struct sysinit **xipp;
127 	int count;
128 
129 	count = set_end - set;
130 	if (newsysinit)
131 		count += newsysinit_end - newsysinit;
132 	else
133 		count += sysinit_end - sysinit;
134 	newset = kmalloc(count * sizeof(*sipp), M_TEMP, M_WAITOK);
135 	xipp = newset;
136 	if (newsysinit) {
137 		for (sipp = newsysinit; sipp < newsysinit_end; sipp++)
138 			*xipp++ = *sipp;
139 	} else {
140 		for (sipp = sysinit; sipp < sysinit_end; sipp++)
141 			*xipp++ = *sipp;
142 	}
143 	for (sipp = set; sipp < set_end; sipp++)
144 		*xipp++ = *sipp;
145 	if (newsysinit)
146 		kfree(newsysinit, M_TEMP);
147 	newsysinit = newset;
148 	newsysinit_end = newset + count;
149 }
150 
151 /*
152  * Callbacks from machine-dependant startup code (e.g. init386) to set
153  * up low level entities related to cpu #0's globaldata.
154  *
155  * Called from very low level boot code.
156  */
157 void
158 mi_proc0init(struct globaldata *gd, struct user *proc0paddr)
159 {
160 	lwkt_init_thread(&thread0, proc0paddr, LWKT_THREAD_STACK, 0, gd);
161 	lwkt_set_comm(&thread0, "thread0");
162 	RB_INIT(&proc0.p_lwp_tree);
163 	spin_init(&proc0.p_spin);
164 	proc0.p_lasttid = 0;	/* +1 = next TID */
165 	lwp_rb_tree_RB_INSERT(&proc0.p_lwp_tree, &lwp0);
166 	lwp0.lwp_thread = &thread0;
167 	lwp0.lwp_proc = &proc0;
168 	proc0.p_usched = usched_init();
169 	lwp0.lwp_cpumask = 0xFFFFFFFF;
170 	varsymset_init(&proc0.p_varsymset, NULL);
171 	thread0.td_flags |= TDF_RUNNING;
172 	thread0.td_proc = &proc0;
173 	thread0.td_lwp = &lwp0;
174 	thread0.td_switch = cpu_lwkt_switch;
175 	lwkt_schedule_self(curthread);
176 }
177 
178 /*
179  * System startup; initialize the world, create process 0, mount root
180  * filesystem, and fork to create init and pagedaemon.  Most of the
181  * hard work is done in the lower-level initialization routines including
182  * startup(), which does memory initialization and autoconfiguration.
183  *
184  * This allows simple addition of new kernel subsystems that require
185  * boot time initialization.  It also allows substitution of subsystem
186  * (for instance, a scheduler, kernel profiler, or VM system) by object
187  * module.  Finally, it allows for optional "kernel threads".
188  */
189 void
190 mi_startup(void)
191 {
192 	struct sysinit *sip;		/* system initialization*/
193 	struct sysinit **sipp;		/* system initialization*/
194 	struct sysinit **xipp;		/* interior loop of sort*/
195 	struct sysinit *save;		/* bubble*/
196 
197 	//kprintf0("mi_startup\n");
198 
199 	if (sysinit == NULL) {
200 		sysinit = SET_BEGIN(sysinit_set);
201 		sysinit_end = SET_LIMIT(sysinit_set);
202 	}
203 
204 restart:
205 	/*
206 	 * Perform a bubble sort of the system initialization objects by
207 	 * their subsystem (primary key) and order (secondary key).
208 	 */
209 	for (sipp = sysinit; sipp < sysinit_end; sipp++) {
210 		for (xipp = sipp + 1; xipp < sysinit_end; xipp++) {
211 			if ((*sipp)->subsystem < (*xipp)->subsystem ||
212 			     ((*sipp)->subsystem == (*xipp)->subsystem &&
213 			      (*sipp)->order <= (*xipp)->order))
214 				continue;	/* skip*/
215 			save = *sipp;
216 			*sipp = *xipp;
217 			*xipp = save;
218 		}
219 	}
220 
221 	/*
222 	 * Traverse the (now) ordered list of system initialization tasks.
223 	 * Perform each task, and continue on to the next task.
224 	 *
225 	 * The last item on the list is expected to be the scheduler,
226 	 * which will not return.
227 	 */
228 	for (sipp = sysinit; sipp < sysinit_end; sipp++) {
229 		sip = *sipp;
230 		if (sip->subsystem == SI_SPECIAL_DUMMY)
231 			continue;	/* skip dummy task(s)*/
232 
233 		if (sip->subsystem == SI_SPECIAL_DONE)
234 			continue;
235 
236 		//kprintf0("!%s!", sip->name);
237 
238 		/* Call function */
239 		(*(sip->func))(sip->udata);
240 
241 		/* Check off the one we're just done */
242 		sip->subsystem = SI_SPECIAL_DONE;
243 
244 		/* Check if we've installed more sysinit items via KLD */
245 		if (newsysinit != NULL) {
246 			if (sysinit != SET_BEGIN(sysinit_set))
247 				kfree(sysinit, M_TEMP);
248 			sysinit = newsysinit;
249 			sysinit_end = newsysinit_end;
250 			newsysinit = NULL;
251 			newsysinit_end = NULL;
252 			goto restart;
253 		}
254 	}
255 
256 	panic("Shouldn't get here!");
257 	/* NOTREACHED*/
258 }
259 
260 
261 /*
262  ***************************************************************************
263  ****
264  **** The following SYSINIT's belong elsewhere, but have not yet
265  **** been moved.
266  ****
267  ***************************************************************************
268  */
269 static void
270 print_caddr_t(void *data __unused)
271 {
272 	kprintf("%s", (char *)data);
273 }
274 SYSINIT(announce, SI_BOOT1_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
275 
276 /*
277  * Leave the critical section that protected us from spurious interrupts
278  * so device probes work.
279  */
280 static void
281 leavecrit(void *dummy __unused)
282 {
283 	MachIntrABI.finalize();
284 	cpu_enable_intr();
285 	MachIntrABI.cleanup();
286 	crit_exit();
287 	KKASSERT(!IN_CRITICAL_SECT(curthread));
288 
289 	if (bootverbose)
290 		kprintf("Leaving critical section, allowing interrupts\n");
291 }
292 SYSINIT(leavecrit, SI_BOOT2_LEAVE_CRIT, SI_ORDER_ANY, leavecrit, NULL)
293 
294 /*
295  * This is called after the threading system is up and running,
296  * including the softclock, clock interrupts, and SMP.
297  */
298 static void
299 tsleepworks(void *dummy __unused)
300 {
301 	tsleep_now_works = 1;
302 }
303 SYSINIT(tsleepworks, SI_BOOT2_FINISH_SMP, SI_ORDER_SECOND, tsleepworks, NULL)
304 
305 /*
306  * This is called after devices have configured.  Tell the kernel we are
307  * no longer in cold boot.
308  */
309 static void
310 endofcoldboot(void *dummy __unused)
311 {
312 	cold = 0;
313 }
314 SYSINIT(endofcoldboot, SI_SUB_ISWARM, SI_ORDER_ANY, endofcoldboot, NULL)
315 
316 /*
317  ***************************************************************************
318  ****
319  **** The two following SYSINT's are proc0 specific glue code.  I am not
320  **** convinced that they can not be safely combined, but their order of
321  **** operation has been maintained as the same as the original init_main.c
322  **** for right now.
323  ****
324  **** These probably belong in init_proc.c or kern_proc.c, since they
325  **** deal with proc0 (the fork template process).
326  ****
327  ***************************************************************************
328  */
329 /* ARGSUSED*/
330 static void
331 proc0_init(void *dummy __unused)
332 {
333 	struct proc *p;
334 	struct lwp *lp;
335 
336 	p = &proc0;
337 	lp = &lwp0;
338 
339 	/*
340 	 * Initialize process and pgrp structures.
341 	 */
342 	procinit();
343 
344 	/*
345 	 * additional VM structures
346 	 */
347 	vm_init2();
348 
349 	/*
350 	 * Create process 0 (the swapper).
351 	 */
352 	LIST_INSERT_HEAD(&allproc, p, p_list);
353 	p->p_pgrp = &pgrp0;
354 	LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
355 	LIST_INIT(&pgrp0.pg_members);
356 	LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
357 
358 	pgrp0.pg_session = &session0;
359 	session0.s_count = 1;
360 	session0.s_leader = p;
361 
362 	p->p_sysent = &aout_sysvec;
363 
364 	p->p_flag = P_SYSTEM;
365 	p->p_stat = SACTIVE;
366 	lp->lwp_stat = LSRUN;
367 	p->p_nice = NZERO;
368 	p->p_rtprio.type = RTP_PRIO_NORMAL;
369 	p->p_rtprio.prio = 0;
370 	lp->lwp_rtprio = p->p_rtprio;
371 
372 	p->p_peers = 0;
373 	p->p_leader = p;
374 
375 	bcopy("swapper", p->p_comm, sizeof ("swapper"));
376 	bcopy("swapper", thread0.td_comm, sizeof ("swapper"));
377 
378 	/* Create credentials. */
379 	p->p_ucred = crget();
380 	p->p_ucred->cr_ruidinfo = uifind(0);
381 	p->p_ucred->cr_ngroups = 1;	/* group 0 */
382 	p->p_ucred->cr_uidinfo = uifind(0);
383 
384 	/* Don't jail it */
385 	p->p_ucred->cr_prison = NULL;
386 
387 	/* Create sigacts. */
388 	p->p_sigacts = &sigacts0;
389 	p->p_sigacts->ps_refcnt = 1;
390 
391 	/* Initialize signal state for process 0. */
392 	siginit(p);
393 
394 	/* Create the file descriptor table. */
395 	fdinit_bootstrap(p, &filedesc0, cmask);
396 
397 	/* Create the limits structures. */
398 	plimit_init0(&limit0);
399 	p->p_limit = &limit0;
400 
401 	/* Allocate a prototype map so we have something to fork. */
402 	pmap_pinit0(vmspace_pmap(&vmspace0));
403 	p->p_vmspace = &vmspace0;
404 	lp->lwp_vmspace = p->p_vmspace;
405 	sysref_init(&vmspace0.vm_sysref, &vmspace_sysref_class);
406 	vm_map_init(&vmspace0.vm_map,
407 		    round_page(VM_MIN_USER_ADDRESS),
408 		    trunc_page(VM_MAX_USER_ADDRESS),
409 		    vmspace_pmap(&vmspace0));
410 	sysref_activate(&vmspace0.vm_sysref);
411 
412 	/*
413 	 * Charge root for one process.
414 	 */
415 	(void)chgproccnt(p->p_ucred->cr_uidinfo, 1, 0);
416 	vm_init_limits(p);
417 }
418 SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL)
419 
420 static int proc0_post_callback(struct proc *p, void *data __unused);
421 
422 /* ARGSUSED*/
423 static void
424 proc0_post(void *dummy __unused)
425 {
426 	struct timespec ts;
427 
428 	/*
429 	 * Now we can look at the time, having had a chance to verify the
430 	 * time from the file system.  Pretend that proc0 started now.
431 	 */
432 	allproc_scan(proc0_post_callback, NULL);
433 
434 	/*
435 	 * Give the ``random'' number generator a thump.
436 	 * XXX: Does read_random() contain enough bits to be used here ?
437 	 */
438 	nanotime(&ts);
439 	skrandom(ts.tv_sec ^ ts.tv_nsec);
440 }
441 
442 static int
443 proc0_post_callback(struct proc *p, void *data __unused)
444 {
445 	microtime(&p->p_start);
446 	return(0);
447 }
448 
449 SYSINIT(p0post, SI_SUB_PROC0_POST, SI_ORDER_FIRST, proc0_post, NULL)
450 
451 /*
452  ***************************************************************************
453  ****
454  **** The following SYSINIT's and glue code should be moved to the
455  **** respective files on a per subsystem basis.
456  ****
457  ***************************************************************************
458  */
459 
460 
461 /*
462  ***************************************************************************
463  ****
464  **** The following code probably belongs in another file, like
465  **** kern/init_init.c.
466  ****
467  ***************************************************************************
468  */
469 
470 /*
471  * List of paths to try when searching for "init".
472  */
473 static char init_path[MAXPATHLEN] =
474 #ifdef	INIT_PATH
475     __XSTRING(INIT_PATH);
476 #else
477     "/sbin/init:/sbin/oinit:/sbin/init.bak";
478 #endif
479 SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
480 
481 /*
482  * Start the initial user process; try exec'ing each pathname in init_path.
483  * The program is invoked with one argument containing the boot flags.
484  *
485  * The MP lock is held on entry.
486  */
487 static void
488 start_init(void *dummy, struct trapframe *frame)
489 {
490 	vm_offset_t addr;
491 	struct execve_args args;
492 	int options, error;
493 	char *var, *path, *next, *s;
494 	char *ucp, **uap, *arg0, *arg1;
495 	struct proc *p;
496 	struct lwp *lp;
497 	struct mount *mp;
498 	struct vnode *vp;
499 
500 	p = curproc;
501 
502 	lp = ONLY_LWP_IN_PROC(p);
503 
504 	/* Get the vnode for '/'.  Set p->p_fd->fd_cdir to reference it. */
505 	mp = mountlist_boot_getfirst();
506 	if (VFS_ROOT(mp, &vp))
507 		panic("cannot find root vnode");
508 	if (mp->mnt_ncmountpt.ncp == NULL) {
509 		cache_allocroot(&mp->mnt_ncmountpt, mp, vp);
510 		cache_unlock(&mp->mnt_ncmountpt);	/* leave ref intact */
511 	}
512 	p->p_fd->fd_cdir = vp;
513 	vref(p->p_fd->fd_cdir);
514 	p->p_fd->fd_rdir = vp;
515 	vref(p->p_fd->fd_rdir);
516 	vfs_cache_setroot(vp, cache_hold(&mp->mnt_ncmountpt));
517 	vn_unlock(vp);			/* leave ref intact */
518 	cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_ncdir);
519 	cache_copy(&mp->mnt_ncmountpt, &p->p_fd->fd_nrdir);
520 
521 	/*
522 	 * Need just enough stack to hold the faked-up "execve()" arguments.
523 	 */
524 	addr = trunc_page(USRSTACK - PAGE_SIZE);
525 	error = vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
526 			    FALSE,
527 			    VM_MAPTYPE_NORMAL,
528 			    VM_PROT_ALL, VM_PROT_ALL,
529 			    0);
530 	if (error)
531 		panic("init: couldn't allocate argument space");
532 	p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
533 	p->p_vmspace->vm_ssize = 1;
534 
535 	if ((var = kgetenv("init_path")) != NULL) {
536 		strncpy(init_path, var, sizeof init_path);
537 		init_path[sizeof init_path - 1] = 0;
538 	}
539 	if ((var = kgetenv("kern.fallback_elf_brand")) != NULL)
540 		fallback_elf_brand = strtol(var, NULL, 0);
541 
542 	for (path = init_path; *path != '\0'; path = next) {
543 		while (*path == ':')
544 			path++;
545 		if (*path == '\0')
546 			break;
547 		for (next = path; *next != '\0' && *next != ':'; next++)
548 			/* nothing */ ;
549 		if (bootverbose)
550 			kprintf("start_init: trying %.*s\n", (int)(next - path),
551 			    path);
552 
553 		/*
554 		 * Move out the boot flag argument.
555 		 */
556 		options = 0;
557 		ucp = (char *)USRSTACK;
558 		(void)subyte(--ucp, 0);		/* trailing zero */
559 		if (boothowto & RB_SINGLE) {
560 			(void)subyte(--ucp, 's');
561 			options = 1;
562 		}
563 #ifdef notyet
564                 if (boothowto & RB_FASTBOOT) {
565 			(void)subyte(--ucp, 'f');
566 			options = 1;
567 		}
568 #endif
569 
570 #ifdef BOOTCDROM
571 		(void)subyte(--ucp, 'C');
572 		options = 1;
573 #endif
574 		if (options == 0)
575 			(void)subyte(--ucp, '-');
576 		(void)subyte(--ucp, '-');		/* leading hyphen */
577 		arg1 = ucp;
578 
579 		/*
580 		 * Move out the file name (also arg 0).
581 		 */
582 		(void)subyte(--ucp, 0);
583 		for (s = next - 1; s >= path; s--)
584 			(void)subyte(--ucp, *s);
585 		arg0 = ucp;
586 
587 		/*
588 		 * Move out the arg pointers.
589 		 */
590 		uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
591 		(void)suword((caddr_t)--uap, (long)0);	/* terminator */
592 		(void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
593 		(void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
594 
595 		/*
596 		 * Point at the arguments.
597 		 */
598 		args.fname = arg0;
599 		args.argv = uap;
600 		args.envv = NULL;
601 
602 		/*
603 		 * Now try to exec the program.  If can't for any reason
604 		 * other than it doesn't exist, complain.
605 		 *
606 		 * Otherwise, return via fork_trampoline() all the way
607 		 * to user mode as init!
608 		 *
609 		 * WARNING!  We may have been moved to another cpu after
610 		 * acquiring the current user process designation.  The
611 		 * MP lock will migrate with us though so we still have to
612 		 * release it.
613 		 */
614 		if ((error = sys_execve(&args)) == 0) {
615 			rel_mplock();
616 			lp->lwp_proc->p_usched->acquire_curproc(lp);
617 			return;
618 		}
619 		if (error != ENOENT)
620 			kprintf("exec %.*s: error %d\n", (int)(next - path),
621 			    path, error);
622 	}
623 	kprintf("init: not found in path %s\n", init_path);
624 	panic("no init");
625 }
626 
627 /*
628  * Like kthread_create(), but runs in it's own address space.
629  * We do this early to reserve pid 1.
630  *
631  * Note special case - do not make it runnable yet.  Other work
632  * in progress will change this more.
633  */
634 static void
635 create_init(const void *udata __unused)
636 {
637 	int error;
638 	struct lwp *lp;
639 
640 	crit_enter();
641 	error = fork1(&lwp0, RFFDG | RFPROC, &initproc);
642 	if (error)
643 		panic("cannot fork init: %d", error);
644 	initproc->p_flag |= P_SYSTEM;
645 	lp = ONLY_LWP_IN_PROC(initproc);
646 	cpu_set_fork_handler(lp, start_init, NULL);
647 	crit_exit();
648 }
649 SYSINIT(init, SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
650 
651 /*
652  * Make it runnable now.
653  */
654 static void
655 kick_init(const void *udata __unused)
656 {
657 	start_forked_proc(&lwp0, initproc);
658 }
659 SYSINIT(kickinit, SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
660 
661 /*
662  * Machine independant globaldata initialization
663  *
664  * WARNING!  Called from early boot, 'mycpu' may not work yet.
665  */
666 void
667 mi_gdinit(struct globaldata *gd, int cpuid)
668 {
669 	TAILQ_INIT(&gd->gd_systimerq);
670 	gd->gd_sysid_alloc = cpuid;	/* prime low bits for cpu lookup */
671 	gd->gd_cpuid = cpuid;
672 	gd->gd_cpumask = (cpumask_t)1 << cpuid;
673 	lwkt_gdinit(gd);
674 	vm_map_entry_reserve_cpu_init(gd);
675 	sleep_gdinit(gd);
676 }
677 
678