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: head/sys/kern/init_main.c 64529 2000-08-11 09:05:12Z peter $
43 */
44
45#include "opt_init_path.h"
46
47#include <sys/param.h>
48#include <sys/file.h>
49#include <sys/filedesc.h>
50#include <sys/kernel.h>
51#include <sys/mount.h>
52#include <sys/sysctl.h>
53#include <sys/proc.h>
54#include <sys/resourcevar.h>
55#include <sys/signalvar.h>
56#include <sys/systm.h>
57#include <sys/vnode.h>
58#include <sys/sysent.h>
59#include <sys/reboot.h>
60#include <sys/sysproto.h>
61#include <sys/vmmeter.h>
62#include <sys/unistd.h>
63#include <sys/malloc.h>
64
65#include <machine/cpu.h>
66
67#include <vm/vm.h>
68#include <vm/vm_param.h>
69#include <sys/lock.h>
70#include <vm/pmap.h>
71#include <vm/vm_map.h>
72#include <sys/user.h>
73#include <sys/copyright.h>
74
75extern struct linker_set sysinit_set; /* XXX */
76
77void mi_startup(void); /* Should be elsewhere */
78
79/* Components of the first process -- never freed. */
80static struct session session0;
81static struct pgrp pgrp0;
82struct proc proc0;
83static struct pcred cred0;
84static struct procsig procsig0;
85static struct filedesc0 filedesc0;
86static struct plimit limit0;
87static struct vmspace vmspace0;
88struct proc *initproc;
89
90int cmask = CMASK;
91extern struct user *proc0paddr;
92
93struct vnode *rootvp;
94int boothowto = 0; /* initialized so that it can be patched */
95SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
96
97/*
98 * This ensures that there is at least one entry so that the sysinit_set
99 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
100 * executed.
101 */
102SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
103
104/*
105 * The sysinit table itself. Items are checked off as the are run.
106 * If we want to register new sysinit types, add them to newsysinit.
107 */
108struct sysinit **sysinit = (struct sysinit **)sysinit_set.ls_items;
109struct sysinit **newsysinit;
110
111/*
112 * Merge a new sysinit set into the current set, reallocating it if
113 * necessary. This can only be called after malloc is running.
114 */
115void
116sysinit_add(struct sysinit **set)
117{
118 struct sysinit **newset;
119 struct sysinit **sipp;
120 struct sysinit **xipp;
121 int count = 0;
122
123 if (newsysinit)
124 for (sipp = newsysinit; *sipp; sipp++)
125 count++;
126 else
127 for (sipp = sysinit; *sipp; sipp++)
128 count++;
129 for (sipp = set; *sipp; sipp++)
130 count++;
131 count++; /* Trailing NULL */
132 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
133 if (newset == NULL)
134 panic("cannot malloc for sysinit");
135 xipp = newset;
136 if (newsysinit)
137 for (sipp = newsysinit; *sipp; sipp++)
138 *xipp++ = *sipp;
139 else
140 for (sipp = sysinit; *sipp; sipp++)
141 *xipp++ = *sipp;
142 for (sipp = set; *sipp; sipp++)
143 *xipp++ = *sipp;
144 *xipp = NULL;
145 if (newsysinit)
146 free(newsysinit, M_TEMP);
147 newsysinit = newset;
148}
149
150/*
151 * System startup; initialize the world, create process 0, mount root
152 * filesystem, and fork to create init and pagedaemon. Most of the
153 * hard work is done in the lower-level initialization routines including
154 * startup(), which does memory initialization and autoconfiguration.
155 *
156 * This allows simple addition of new kernel subsystems that require
157 * boot time initialization. It also allows substitution of subsystem
158 * (for instance, a scheduler, kernel profiler, or VM system) by object
159 * module. Finally, it allows for optional "kernel threads".
160 */
161void
162mi_startup(void)
163{
164
165 register struct sysinit **sipp; /* system initialization*/
166 register struct sysinit **xipp; /* interior loop of sort*/
167 register struct sysinit *save; /* bubble*/
168
169restart:
170 /*
171 * Perform a bubble sort of the system initialization objects by
172 * their subsystem (primary key) and order (secondary key).
173 */
174 for (sipp = sysinit; *sipp; sipp++) {
175 for (xipp = sipp + 1; *xipp; xipp++) {
176 if ((*sipp)->subsystem < (*xipp)->subsystem ||
177 ((*sipp)->subsystem == (*xipp)->subsystem &&
178 (*sipp)->order <= (*xipp)->order))
179 continue; /* skip*/
180 save = *sipp;
181 *sipp = *xipp;
182 *xipp = save;
183 }
184 }
185
186 /*
187 * Traverse the (now) ordered list of system initialization tasks.
188 * Perform each task, and continue on to the next task.
189 *
190 * The last item on the list is expected to be the scheduler,
191 * which will not return.
192 */
193 for (sipp = sysinit; *sipp; sipp++) {
194
195 if ((*sipp)->subsystem == SI_SUB_DUMMY)
196 continue; /* skip dummy task(s)*/
197
198 if ((*sipp)->subsystem == SI_SUB_DONE)
199 continue;
200
201 /* Call function */
202 (*((*sipp)->func))((*sipp)->udata);
203
204 /* Check off the one we're just done */
205 (*sipp)->subsystem = SI_SUB_DONE;
206
207 /* Check if we've installed more sysinit items via KLD */
208 if (newsysinit != NULL) {
209 if (sysinit != (struct sysinit **)sysinit_set.ls_items)
210 free(sysinit, M_TEMP);
211 sysinit = newsysinit;
212 newsysinit = NULL;
213 goto restart;
214 }
215 }
216
217 panic("Shouldn't get here!");
218 /* NOTREACHED*/
219}
220
221
222/*
223 ***************************************************************************
224 ****
225 **** The following SYSINIT's belong elsewhere, but have not yet
226 **** been moved.
227 ****
228 ***************************************************************************
229 */
230static void
231print_caddr_t(void *data __unused)
232{
233 printf("%s", (char *)data);
234}
235SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
236
237
238/*
239 ***************************************************************************
240 ****
241 **** The two following SYSINT's are proc0 specific glue code. I am not
242 **** convinced that they can not be safely combined, but their order of
243 **** operation has been maintained as the same as the original init_main.c
244 **** for right now.
245 ****
246 **** These probably belong in init_proc.c or kern_proc.c, since they
247 **** deal with proc0 (the fork template process).
248 ****
249 ***************************************************************************
250 */
251/* ARGSUSED*/
252static void
253proc0_init(void *dummy __unused)
254{
255 register struct proc *p;
256 register struct filedesc0 *fdp;
257 register unsigned i;
258
259 p = &proc0;
260
261 /*
262 * Initialize process and pgrp structures.
263 */
264 procinit();
265
266 /*
267 * Initialize sleep queue hash table
268 */
269 sleepinit();
270
271 /*
272 * additional VM structures
273 */
274 vm_init2();
275
276 /*
277 * Create process 0 (the swapper).
278 */
279 LIST_INSERT_HEAD(&allproc, p, p_list);
280 p->p_pgrp = &pgrp0;
281 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
282 LIST_INIT(&pgrp0.pg_members);
283 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
284
285 pgrp0.pg_session = &session0;
286 session0.s_count = 1;
287 session0.s_leader = p;
288
289 p->p_sysent = &aout_sysvec;
290
291 p->p_flag = P_INMEM | P_SYSTEM;
292 p->p_stat = SRUN;
293 p->p_nice = NZERO;
294 p->p_rtprio.type = RTP_PRIO_NORMAL;
295 p->p_rtprio.prio = 0;
296
297 p->p_peers = 0;
298 p->p_leader = p;
299
300 bcopy("swapper", p->p_comm, sizeof ("swapper"));
301
302 /* Create credentials. */
303 cred0.p_refcnt = 1;
304 p->p_cred = &cred0;
305 p->p_ucred = crget();
306 p->p_ucred->cr_ngroups = 1; /* group 0 */
307
308 /* Don't jail it */
309 p->p_prison = 0;
310
311 /* Create procsig. */
312 p->p_procsig = &procsig0;
313 p->p_procsig->ps_refcnt = 1;
314
315 /* Initialize signal state for process 0. */
316 siginit(&proc0);
317
318 /* Create the file descriptor table. */
319 fdp = &filedesc0;
320 p->p_fd = &fdp->fd_fd;
321 fdp->fd_fd.fd_refcnt = 1;
322 fdp->fd_fd.fd_cmask = cmask;
323 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
324 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
325 fdp->fd_fd.fd_nfiles = NDFILE;
326
327 /* Create the limits structures. */
328 p->p_limit = &limit0;
329 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
330 limit0.pl_rlimit[i].rlim_cur =
331 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
332 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur =
333 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
334 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur =
335 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
336 i = ptoa(cnt.v_free_count);
337 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
338 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
339 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
340 limit0.p_cpulimit = RLIM_INFINITY;
341 limit0.p_refcnt = 1;
342
343 /* Allocate a prototype map so we have something to fork. */
344 pmap_pinit0(vmspace_pmap(&vmspace0));
345 p->p_vmspace = &vmspace0;
346 vmspace0.vm_refcnt = 1;
347 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
348 trunc_page(VM_MAXUSER_ADDRESS));
349 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
350 p->p_addr = proc0paddr; /* XXX */
351
352 /*
353 * We continue to place resource usage info and signal
354 * actions in the user struct so they're pageable.
355 */
356 p->p_stats = &p->p_addr->u_stats;
357 p->p_sigacts = &p->p_addr->u_sigacts;
358
359 /*
360 * Charge root for one process.
361 */
362 (void)chgproccnt(0, 1, 0);
363
364 /*
365 * Initialize the current process pointer (curproc) before
366 * any possible traps/probes to simplify trap processing.
367 */
368 SET_CURPROC(p);
369
370}
371SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
372
373/* ARGSUSED*/
374static void
375proc0_post(void *dummy __unused)
376{
377 struct timespec ts;
378 struct proc *p;
379
380 /*
381 * Now we can look at the time, having had a chance to verify the
382 * time from the file system. Pretend that proc0 started now.
383 */
384 LIST_FOREACH(p, &allproc, p_list) {
385 microtime(&p->p_stats->p_start);
386 p->p_runtime = 0;
387 }
388 microuptime(&switchtime);
389 switchticks = ticks;
390
391 /*
392 * Give the ``random'' number generator a thump.
393 */
394 nanotime(&ts);
395 srandom(ts.tv_sec ^ ts.tv_nsec);
396}
397SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
398
399/*
400 ***************************************************************************
401 ****
402 **** The following SYSINIT's and glue code should be moved to the
403 **** respective files on a per subsystem basis.
404 ****
405 ***************************************************************************
406 */
407
408
409/*
410 ***************************************************************************
411 ****
412 **** The following code probably belongs in another file, like
413 **** kern/init_init.c.
414 ****
415 ***************************************************************************
416 */
417
418
419/*
420 * List of paths to try when searching for "init".
421 */
422static char init_path[MAXPATHLEN] =
423#ifdef INIT_PATH
424 __XSTRING(INIT_PATH);
425#else
426 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
427#endif
428SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
429
430/*
431 * Start the initial user process; try exec'ing each pathname in init_path.
432 * The program is invoked with one argument containing the boot flags.
433 */
434static void
435start_init(void *dummy)
436{
437 vm_offset_t addr;
438 struct execve_args args;
439 int options, error;
440 char *var, *path, *next, *s;
441 char *ucp, **uap, *arg0, *arg1;
442 struct proc *p;
443
444 p = curproc;
445
446 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
447 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
448 panic("cannot find root vnode");
449 p->p_fd->fd_cdir = rootvnode;
450 VREF(p->p_fd->fd_cdir);
451 p->p_fd->fd_rdir = rootvnode;
452 VOP_UNLOCK(rootvnode, 0, p);
453
454 /*
455 * Need just enough stack to hold the faked-up "execve()" arguments.
456 */
457 addr = trunc_page(USRSTACK - PAGE_SIZE);
458 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
459 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
460 panic("init: couldn't allocate argument space");
461 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
462 p->p_vmspace->vm_ssize = 1;
463
464 if ((var = getenv("init_path")) != NULL) {
465 strncpy(init_path, var, sizeof init_path);
466 init_path[sizeof init_path - 1] = 0;
467 }
468
469 for (path = init_path; *path != '\0'; path = next) {
470 while (*path == ':')
471 path++;
472 if (*path == '\0')
473 break;
474 for (next = path; *next != '\0' && *next != ':'; next++)
475 /* nothing */ ;
476 if (bootverbose)
477 printf("start_init: trying %.*s\n", (int)(next - path),
478 path);
479
480 /*
481 * Move out the boot flag argument.
482 */
483 options = 0;
484 ucp = (char *)USRSTACK;
485 (void)subyte(--ucp, 0); /* trailing zero */
486 if (boothowto & RB_SINGLE) {
487 (void)subyte(--ucp, 's');
488 options = 1;
489 }
490#ifdef notyet
491 if (boothowto & RB_FASTBOOT) {
492 (void)subyte(--ucp, 'f');
493 options = 1;
494 }
495#endif
496
497#ifdef BOOTCDROM
498 (void)subyte(--ucp, 'C');
499 options = 1;
500#endif
501 if (options == 0)
502 (void)subyte(--ucp, '-');
503 (void)subyte(--ucp, '-'); /* leading hyphen */
504 arg1 = ucp;
505
506 /*
507 * Move out the file name (also arg 0).
508 */
509 (void)subyte(--ucp, 0);
510 for (s = next - 1; s >= path; s--)
511 (void)subyte(--ucp, *s);
512 arg0 = ucp;
513
514 /*
515 * Move out the arg pointers.
516 */
517 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
518 (void)suword((caddr_t)--uap, (long)0); /* terminator */
519 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
520 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
521
522 /*
523 * Point at the arguments.
524 */
525 args.fname = arg0;
526 args.argv = uap;
527 args.envv = NULL;
528
529 /*
530 * Now try to exec the program. If can't for any reason
531 * other than it doesn't exist, complain.
532 *
533 * Otherwise, return via fork_trampoline() all the way
534 * to user mode as init!
535 */
536 if ((error = execve(p, &args)) == 0)
537 return;
538 if (error != ENOENT)
539 printf("exec %.*s: error %d\n", (int)(next - path),
540 path, error);
541 }
542 printf("init: not found in path %s\n", init_path);
543 panic("no init");
544}
545
546/*
547 * Like kthread_create(), but runs in it's own address space.
548 * We do this early to reserve pid 1.
549 *
550 * Note special case - do not make it runnable yet. Other work
551 * in progress will change this more.
552 */
553static void
554create_init(const void *udata __unused)
555{
556 int error;
557 int s;
558
559 s = splhigh();
560 error = fork1(&proc0, RFFDG | RFPROC, &initproc);
561 if (error)
562 panic("cannot fork init: %d\n", error);
563 initproc->p_flag |= P_INMEM | P_SYSTEM;
564 cpu_set_fork_handler(initproc, start_init, NULL);
565 remrunqueue(initproc);
566 splx(s);
567}
568SYSINIT(init,SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
569
570/*
571 * Make it runnable now.
572 */
573static void
574kick_init(const void *udata __unused)
575{
576 setrunqueue(initproc);
577}
578SYSINIT(kickinit,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)
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: head/sys/kern/init_main.c 64529 2000-08-11 09:05:12Z peter $
43 */
44
45#include "opt_init_path.h"
46
47#include <sys/param.h>
48#include <sys/file.h>
49#include <sys/filedesc.h>
50#include <sys/kernel.h>
51#include <sys/mount.h>
52#include <sys/sysctl.h>
53#include <sys/proc.h>
54#include <sys/resourcevar.h>
55#include <sys/signalvar.h>
56#include <sys/systm.h>
57#include <sys/vnode.h>
58#include <sys/sysent.h>
59#include <sys/reboot.h>
60#include <sys/sysproto.h>
61#include <sys/vmmeter.h>
62#include <sys/unistd.h>
63#include <sys/malloc.h>
64
65#include <machine/cpu.h>
66
67#include <vm/vm.h>
68#include <vm/vm_param.h>
69#include <sys/lock.h>
70#include <vm/pmap.h>
71#include <vm/vm_map.h>
72#include <sys/user.h>
73#include <sys/copyright.h>
74
75extern struct linker_set sysinit_set; /* XXX */
76
77void mi_startup(void); /* Should be elsewhere */
78
79/* Components of the first process -- never freed. */
80static struct session session0;
81static struct pgrp pgrp0;
82struct proc proc0;
83static struct pcred cred0;
84static struct procsig procsig0;
85static struct filedesc0 filedesc0;
86static struct plimit limit0;
87static struct vmspace vmspace0;
88struct proc *initproc;
89
90int cmask = CMASK;
91extern struct user *proc0paddr;
92
93struct vnode *rootvp;
94int boothowto = 0; /* initialized so that it can be patched */
95SYSCTL_INT(_debug, OID_AUTO, boothowto, CTLFLAG_RD, &boothowto, 0, "");
96
97/*
98 * This ensures that there is at least one entry so that the sysinit_set
99 * symbol is not undefined. A sybsystem ID of SI_SUB_DUMMY is never
100 * executed.
101 */
102SYSINIT(placeholder, SI_SUB_DUMMY, SI_ORDER_ANY, NULL, NULL)
103
104/*
105 * The sysinit table itself. Items are checked off as the are run.
106 * If we want to register new sysinit types, add them to newsysinit.
107 */
108struct sysinit **sysinit = (struct sysinit **)sysinit_set.ls_items;
109struct sysinit **newsysinit;
110
111/*
112 * Merge a new sysinit set into the current set, reallocating it if
113 * necessary. This can only be called after malloc is running.
114 */
115void
116sysinit_add(struct sysinit **set)
117{
118 struct sysinit **newset;
119 struct sysinit **sipp;
120 struct sysinit **xipp;
121 int count = 0;
122
123 if (newsysinit)
124 for (sipp = newsysinit; *sipp; sipp++)
125 count++;
126 else
127 for (sipp = sysinit; *sipp; sipp++)
128 count++;
129 for (sipp = set; *sipp; sipp++)
130 count++;
131 count++; /* Trailing NULL */
132 newset = malloc(count * sizeof(*sipp), M_TEMP, M_NOWAIT);
133 if (newset == NULL)
134 panic("cannot malloc for sysinit");
135 xipp = newset;
136 if (newsysinit)
137 for (sipp = newsysinit; *sipp; sipp++)
138 *xipp++ = *sipp;
139 else
140 for (sipp = sysinit; *sipp; sipp++)
141 *xipp++ = *sipp;
142 for (sipp = set; *sipp; sipp++)
143 *xipp++ = *sipp;
144 *xipp = NULL;
145 if (newsysinit)
146 free(newsysinit, M_TEMP);
147 newsysinit = newset;
148}
149
150/*
151 * System startup; initialize the world, create process 0, mount root
152 * filesystem, and fork to create init and pagedaemon. Most of the
153 * hard work is done in the lower-level initialization routines including
154 * startup(), which does memory initialization and autoconfiguration.
155 *
156 * This allows simple addition of new kernel subsystems that require
157 * boot time initialization. It also allows substitution of subsystem
158 * (for instance, a scheduler, kernel profiler, or VM system) by object
159 * module. Finally, it allows for optional "kernel threads".
160 */
161void
162mi_startup(void)
163{
164
165 register struct sysinit **sipp; /* system initialization*/
166 register struct sysinit **xipp; /* interior loop of sort*/
167 register struct sysinit *save; /* bubble*/
168
169restart:
170 /*
171 * Perform a bubble sort of the system initialization objects by
172 * their subsystem (primary key) and order (secondary key).
173 */
174 for (sipp = sysinit; *sipp; sipp++) {
175 for (xipp = sipp + 1; *xipp; xipp++) {
176 if ((*sipp)->subsystem < (*xipp)->subsystem ||
177 ((*sipp)->subsystem == (*xipp)->subsystem &&
178 (*sipp)->order <= (*xipp)->order))
179 continue; /* skip*/
180 save = *sipp;
181 *sipp = *xipp;
182 *xipp = save;
183 }
184 }
185
186 /*
187 * Traverse the (now) ordered list of system initialization tasks.
188 * Perform each task, and continue on to the next task.
189 *
190 * The last item on the list is expected to be the scheduler,
191 * which will not return.
192 */
193 for (sipp = sysinit; *sipp; sipp++) {
194
195 if ((*sipp)->subsystem == SI_SUB_DUMMY)
196 continue; /* skip dummy task(s)*/
197
198 if ((*sipp)->subsystem == SI_SUB_DONE)
199 continue;
200
201 /* Call function */
202 (*((*sipp)->func))((*sipp)->udata);
203
204 /* Check off the one we're just done */
205 (*sipp)->subsystem = SI_SUB_DONE;
206
207 /* Check if we've installed more sysinit items via KLD */
208 if (newsysinit != NULL) {
209 if (sysinit != (struct sysinit **)sysinit_set.ls_items)
210 free(sysinit, M_TEMP);
211 sysinit = newsysinit;
212 newsysinit = NULL;
213 goto restart;
214 }
215 }
216
217 panic("Shouldn't get here!");
218 /* NOTREACHED*/
219}
220
221
222/*
223 ***************************************************************************
224 ****
225 **** The following SYSINIT's belong elsewhere, but have not yet
226 **** been moved.
227 ****
228 ***************************************************************************
229 */
230static void
231print_caddr_t(void *data __unused)
232{
233 printf("%s", (char *)data);
234}
235SYSINIT(announce, SI_SUB_COPYRIGHT, SI_ORDER_FIRST, print_caddr_t, copyright)
236
237
238/*
239 ***************************************************************************
240 ****
241 **** The two following SYSINT's are proc0 specific glue code. I am not
242 **** convinced that they can not be safely combined, but their order of
243 **** operation has been maintained as the same as the original init_main.c
244 **** for right now.
245 ****
246 **** These probably belong in init_proc.c or kern_proc.c, since they
247 **** deal with proc0 (the fork template process).
248 ****
249 ***************************************************************************
250 */
251/* ARGSUSED*/
252static void
253proc0_init(void *dummy __unused)
254{
255 register struct proc *p;
256 register struct filedesc0 *fdp;
257 register unsigned i;
258
259 p = &proc0;
260
261 /*
262 * Initialize process and pgrp structures.
263 */
264 procinit();
265
266 /*
267 * Initialize sleep queue hash table
268 */
269 sleepinit();
270
271 /*
272 * additional VM structures
273 */
274 vm_init2();
275
276 /*
277 * Create process 0 (the swapper).
278 */
279 LIST_INSERT_HEAD(&allproc, p, p_list);
280 p->p_pgrp = &pgrp0;
281 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
282 LIST_INIT(&pgrp0.pg_members);
283 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
284
285 pgrp0.pg_session = &session0;
286 session0.s_count = 1;
287 session0.s_leader = p;
288
289 p->p_sysent = &aout_sysvec;
290
291 p->p_flag = P_INMEM | P_SYSTEM;
292 p->p_stat = SRUN;
293 p->p_nice = NZERO;
294 p->p_rtprio.type = RTP_PRIO_NORMAL;
295 p->p_rtprio.prio = 0;
296
297 p->p_peers = 0;
298 p->p_leader = p;
299
300 bcopy("swapper", p->p_comm, sizeof ("swapper"));
301
302 /* Create credentials. */
303 cred0.p_refcnt = 1;
304 p->p_cred = &cred0;
305 p->p_ucred = crget();
306 p->p_ucred->cr_ngroups = 1; /* group 0 */
307
308 /* Don't jail it */
309 p->p_prison = 0;
310
311 /* Create procsig. */
312 p->p_procsig = &procsig0;
313 p->p_procsig->ps_refcnt = 1;
314
315 /* Initialize signal state for process 0. */
316 siginit(&proc0);
317
318 /* Create the file descriptor table. */
319 fdp = &filedesc0;
320 p->p_fd = &fdp->fd_fd;
321 fdp->fd_fd.fd_refcnt = 1;
322 fdp->fd_fd.fd_cmask = cmask;
323 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles;
324 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags;
325 fdp->fd_fd.fd_nfiles = NDFILE;
326
327 /* Create the limits structures. */
328 p->p_limit = &limit0;
329 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++)
330 limit0.pl_rlimit[i].rlim_cur =
331 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY;
332 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur =
333 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles;
334 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur =
335 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc;
336 i = ptoa(cnt.v_free_count);
337 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i;
338 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i;
339 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3;
340 limit0.p_cpulimit = RLIM_INFINITY;
341 limit0.p_refcnt = 1;
342
343 /* Allocate a prototype map so we have something to fork. */
344 pmap_pinit0(vmspace_pmap(&vmspace0));
345 p->p_vmspace = &vmspace0;
346 vmspace0.vm_refcnt = 1;
347 vm_map_init(&vmspace0.vm_map, round_page(VM_MIN_ADDRESS),
348 trunc_page(VM_MAXUSER_ADDRESS));
349 vmspace0.vm_map.pmap = vmspace_pmap(&vmspace0);
350 p->p_addr = proc0paddr; /* XXX */
351
352 /*
353 * We continue to place resource usage info and signal
354 * actions in the user struct so they're pageable.
355 */
356 p->p_stats = &p->p_addr->u_stats;
357 p->p_sigacts = &p->p_addr->u_sigacts;
358
359 /*
360 * Charge root for one process.
361 */
362 (void)chgproccnt(0, 1, 0);
363
364 /*
365 * Initialize the current process pointer (curproc) before
366 * any possible traps/probes to simplify trap processing.
367 */
368 SET_CURPROC(p);
369
370}
371SYSINIT(p0init, SI_SUB_INTRINSIC, SI_ORDER_FIRST, proc0_init, NULL)
372
373/* ARGSUSED*/
374static void
375proc0_post(void *dummy __unused)
376{
377 struct timespec ts;
378 struct proc *p;
379
380 /*
381 * Now we can look at the time, having had a chance to verify the
382 * time from the file system. Pretend that proc0 started now.
383 */
384 LIST_FOREACH(p, &allproc, p_list) {
385 microtime(&p->p_stats->p_start);
386 p->p_runtime = 0;
387 }
388 microuptime(&switchtime);
389 switchticks = ticks;
390
391 /*
392 * Give the ``random'' number generator a thump.
393 */
394 nanotime(&ts);
395 srandom(ts.tv_sec ^ ts.tv_nsec);
396}
397SYSINIT(p0post, SI_SUB_INTRINSIC_POST, SI_ORDER_FIRST, proc0_post, NULL)
398
399/*
400 ***************************************************************************
401 ****
402 **** The following SYSINIT's and glue code should be moved to the
403 **** respective files on a per subsystem basis.
404 ****
405 ***************************************************************************
406 */
407
408
409/*
410 ***************************************************************************
411 ****
412 **** The following code probably belongs in another file, like
413 **** kern/init_init.c.
414 ****
415 ***************************************************************************
416 */
417
418
419/*
420 * List of paths to try when searching for "init".
421 */
422static char init_path[MAXPATHLEN] =
423#ifdef INIT_PATH
424 __XSTRING(INIT_PATH);
425#else
426 "/sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall";
427#endif
428SYSCTL_STRING(_kern, OID_AUTO, init_path, CTLFLAG_RD, init_path, 0, "");
429
430/*
431 * Start the initial user process; try exec'ing each pathname in init_path.
432 * The program is invoked with one argument containing the boot flags.
433 */
434static void
435start_init(void *dummy)
436{
437 vm_offset_t addr;
438 struct execve_args args;
439 int options, error;
440 char *var, *path, *next, *s;
441 char *ucp, **uap, *arg0, *arg1;
442 struct proc *p;
443
444 p = curproc;
445
446 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
447 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode))
448 panic("cannot find root vnode");
449 p->p_fd->fd_cdir = rootvnode;
450 VREF(p->p_fd->fd_cdir);
451 p->p_fd->fd_rdir = rootvnode;
452 VOP_UNLOCK(rootvnode, 0, p);
453
454 /*
455 * Need just enough stack to hold the faked-up "execve()" arguments.
456 */
457 addr = trunc_page(USRSTACK - PAGE_SIZE);
458 if (vm_map_find(&p->p_vmspace->vm_map, NULL, 0, &addr, PAGE_SIZE,
459 FALSE, VM_PROT_ALL, VM_PROT_ALL, 0) != 0)
460 panic("init: couldn't allocate argument space");
461 p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
462 p->p_vmspace->vm_ssize = 1;
463
464 if ((var = getenv("init_path")) != NULL) {
465 strncpy(init_path, var, sizeof init_path);
466 init_path[sizeof init_path - 1] = 0;
467 }
468
469 for (path = init_path; *path != '\0'; path = next) {
470 while (*path == ':')
471 path++;
472 if (*path == '\0')
473 break;
474 for (next = path; *next != '\0' && *next != ':'; next++)
475 /* nothing */ ;
476 if (bootverbose)
477 printf("start_init: trying %.*s\n", (int)(next - path),
478 path);
479
480 /*
481 * Move out the boot flag argument.
482 */
483 options = 0;
484 ucp = (char *)USRSTACK;
485 (void)subyte(--ucp, 0); /* trailing zero */
486 if (boothowto & RB_SINGLE) {
487 (void)subyte(--ucp, 's');
488 options = 1;
489 }
490#ifdef notyet
491 if (boothowto & RB_FASTBOOT) {
492 (void)subyte(--ucp, 'f');
493 options = 1;
494 }
495#endif
496
497#ifdef BOOTCDROM
498 (void)subyte(--ucp, 'C');
499 options = 1;
500#endif
501 if (options == 0)
502 (void)subyte(--ucp, '-');
503 (void)subyte(--ucp, '-'); /* leading hyphen */
504 arg1 = ucp;
505
506 /*
507 * Move out the file name (also arg 0).
508 */
509 (void)subyte(--ucp, 0);
510 for (s = next - 1; s >= path; s--)
511 (void)subyte(--ucp, *s);
512 arg0 = ucp;
513
514 /*
515 * Move out the arg pointers.
516 */
517 uap = (char **)((intptr_t)ucp & ~(sizeof(intptr_t)-1));
518 (void)suword((caddr_t)--uap, (long)0); /* terminator */
519 (void)suword((caddr_t)--uap, (long)(intptr_t)arg1);
520 (void)suword((caddr_t)--uap, (long)(intptr_t)arg0);
521
522 /*
523 * Point at the arguments.
524 */
525 args.fname = arg0;
526 args.argv = uap;
527 args.envv = NULL;
528
529 /*
530 * Now try to exec the program. If can't for any reason
531 * other than it doesn't exist, complain.
532 *
533 * Otherwise, return via fork_trampoline() all the way
534 * to user mode as init!
535 */
536 if ((error = execve(p, &args)) == 0)
537 return;
538 if (error != ENOENT)
539 printf("exec %.*s: error %d\n", (int)(next - path),
540 path, error);
541 }
542 printf("init: not found in path %s\n", init_path);
543 panic("no init");
544}
545
546/*
547 * Like kthread_create(), but runs in it's own address space.
548 * We do this early to reserve pid 1.
549 *
550 * Note special case - do not make it runnable yet. Other work
551 * in progress will change this more.
552 */
553static void
554create_init(const void *udata __unused)
555{
556 int error;
557 int s;
558
559 s = splhigh();
560 error = fork1(&proc0, RFFDG | RFPROC, &initproc);
561 if (error)
562 panic("cannot fork init: %d\n", error);
563 initproc->p_flag |= P_INMEM | P_SYSTEM;
564 cpu_set_fork_handler(initproc, start_init, NULL);
565 remrunqueue(initproc);
566 splx(s);
567}
568SYSINIT(init,SI_SUB_CREATE_INIT, SI_ORDER_FIRST, create_init, NULL)
569
570/*
571 * Make it runnable now.
572 */
573static void
574kick_init(const void *udata __unused)
575{
576 setrunqueue(initproc);
577}
578SYSINIT(kickinit,SI_SUB_KTHREAD_INIT, SI_ORDER_FIRST, kick_init, NULL)