2 * Copyright (c) 1995 Terrence R. Lambert
5 * Copyright (c) 1990, 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.
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14 * modification, are permitted provided that the following conditions
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17 * notice, this list of conditions and the following disclaimer.
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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.
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41 * @(#)kernel.h 8.3 (Berkeley) 1/21/94
42 * $FreeBSD: src/sys/sys/kernel.h,v 1.63.2.9 2002/07/02 23:00:30 archie Exp $
43 * $DragonFly: src/sys/sys/kernel.h,v 1.32 2008/08/25 17:11:23 dillon Exp $
46 #ifndef _SYS_KERNEL_H_
47 #define _SYS_KERNEL_H_
50 #error "This file should not be included by userland programs."
54 #include <sys/param.h>
56 #ifndef _SYS_LINKER_SET_H_
57 #include <sys/linker_set.h>
61 #include <sys/queue.h>
64 /* Global variables for the kernel. */
67 extern unsigned long hostid;
68 extern char hostname[MAXHOSTNAMELEN];
69 extern int hostnamelen;
70 extern char domainname[MAXHOSTNAMELEN];
71 extern int domainnamelen;
72 extern char kernelname[MAXPATHLEN];
75 extern struct timespec boottime;
77 extern struct timezone tz; /* XXX */
79 extern int ustick; /* usec per tick (1000000 / hz) */
80 extern int nstick; /* nsec per tick (1000000000 / hz) */
81 extern int tickadj; /* "standard" clock skew, us./tick */
82 extern int hz; /* system clock's frequency */
83 extern int psratio; /* ratio: prof / stat */
84 extern int stathz; /* statistics clock's frequency */
85 extern int profhz; /* profiling clock's frequency */
87 extern int lbolt; /* once a second sleep address */
88 extern int lbolt_syncer; /* approx 1 hz but may be sped up */
91 * Enumerated types for known system startup interfaces.
93 * Startup occurs in ascending numeric order; the list entries are
94 * sorted prior to attempting startup to guarantee order. Items
95 * of the same level are arbitrated for order based on the 'order'
98 * These numbers are arbitrary and are chosen ONLY for ordering; the
99 * enumeration values are explicit rather than implicit to provide
100 * for binary compatibility with inserted elements.
102 * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value.
104 enum sysinit_sub_id {
108 SI_SPECIAL_DUMMY = 0x0000000, /* not executed; for linker*/
109 SI_SPECIAL_DONE = 0x0000001, /* flag sysinit completion */
112 * Memory management subsystems.
114 SI_BOOT1_TUNABLES = 0x0700000, /* establish tunable values */
115 SI_BOOT1_COPYRIGHT = 0x0800000, /* first use of console*/
116 SI_BOOT1_LOCK = 0x0900000, /* lockmgr locks and tokens */
117 SI_BOOT1_VM = 0x1000000, /* virtual memory system init*/
118 SI_BOOT1_ALLOCATOR = 0x1400000, /* slab allocator */
119 SI_BOOT1_KMALLOC = 0x1600000, /* kmalloc inits */
120 SI_BOOT1_POST = 0x1800000, /* post boot1 inits */
123 * Fickle ordering. objcache and softclock need to know what
124 * ncpus is to initialize properly, clocks (e.g. hardclock)
125 * need softclock to work, and we can't finish initializing
126 * the APs until the system clock has been initialized.
127 * Also, clock registration and smp configuration registration
128 * must occur before SMP. Messy messy.
130 SI_BOOT2_LEAVE_CRIT = 0x1900000,
131 SI_BOOT2_PRESMP = 0x1a00000, /* register smp configs */
132 SI_BOOT2_SMP = 0x1a80000, /* SMP startup */
133 SI_BOOT2_CLOCKREG = 0x1ac0000, /* register available clocks */
134 SI_BOOT2_OBJCACHE = 0x1b00000,
135 SI_BOOT2_SOFTCLOCK = 0x1b80000,
136 SI_BOOT2_CLOCKS = 0x1c00000, /* select & start clocks */
137 SI_BOOT2_FINISH_SMP = 0x1c80000, /* SMP go (& synch clocks) */
140 * Finish up core kernel initialization and set up the process
143 SI_BOOT2_BIOS = 0x1d00000,
144 SI_BOOT2_MACHDEP = 0x1d80000,
145 SI_BOOT2_KLD = 0x1e00000,
146 SI_BOOT2_USCHED = 0x1e80000,
147 SI_BOOT2_PROC0 = 0x1f00000,
150 * Continue with miscellanious system initialization
152 SI_SUB_CREATE_INIT = 0x2300000, /* create the init process */
153 SI_SUB_PRE_DRIVERS = 0x2380000,
154 SI_SUB_DRIVERS = 0x2400000, /* Let Drivers initialize */
155 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */
156 SI_SUB_ISWARM = 0x3c00000, /* No longer in cold boot */
157 SI_SUB_VFS = 0x4000000, /* virtual file system*/
158 SI_SUB_HELPER_THREADS = 0x5400000, /* misc helper threads */
159 SI_SUB_CLIST = 0x5800000, /* clists*/
160 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/
161 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/
162 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/
163 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */
164 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/
165 SI_SUB_EXEC = 0x7400000, /* execve() handlers */
166 SI_SUB_PROTO_BEGIN = 0x8000000, /* network protocol pre-init */
167 SI_SUB_PROTO_IF = 0x8400000, /* interfaces */
168 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/
169 SI_SUB_PROTO_IFATTACHDOMAIN
170 = 0x8800001, /* domain dependent data init */
171 SI_SUB_PROTO_END = 0x8ffffff, /* network protocol post-init */
172 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/
173 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/
174 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */
177 * Root filesystem setup, finish up with the major system
180 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */
181 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */
182 SI_SUB_RAID = 0xb300000, /* Configure vinum */
183 SI_SUB_DM_TARGETS = 0xb3a0000, /* configure dm targets */
184 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/
185 SI_SUB_PROC0_POST = 0xd000000, /* proc 0 cleanup*/
186 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
187 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
188 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
189 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/
190 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
191 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
192 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/
197 * Some enumerated orders; "ANY" sorts last.
199 enum sysinit_elem_order {
200 SI_ORDER_FIRST = 0x0000000, /* first*/
201 SI_ORDER_SECOND = 0x0000001, /* second*/
202 SI_ORDER_THIRD = 0x0000002, /* third*/
203 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */
204 SI_ORDER_ANY = 0xfffffff /* last*/
209 * A system initialization call instance
211 * At the moment there is one instance of sysinit. We probably do not
212 * want two which is why this code is if'd out, but we definitely want
213 * to discern SYSINIT's which take non-constant data pointers and
214 * SYSINIT's which take constant data pointers,
216 * The C_* macros take functions expecting const void * arguments
217 * while the non-C_* macros take functions expecting just void * arguments.
219 * With -Wcast-qual on, the compiler issues warnings:
220 * - if we pass non-const data or functions taking non-const data
223 * - if we pass const data to the normal macros
225 * However, no warning is issued if we pass a function taking const data
226 * through a normal non-const macro. This is ok because the function is
227 * saying it won't modify the data so we don't care whether the data is
231 typedef void (*sysinit_nfunc_t) (void *);
232 typedef void (*sysinit_cfunc_t) (const void *);
235 unsigned int subsystem; /* subsystem identifier*/
236 unsigned int order; /* init order within subsystem*/
237 sysinit_cfunc_t func; /* function */
238 const void *udata; /* multiplexer/argument */
243 * Default: no special processing
245 * The C_ version of SYSINIT is for data pointers to const
246 * data ( and functions taking data pointers to const data ).
247 * At the moment it is no different from SYSINIT and thus
248 * still results in warnings.
250 * The casts are necessary to have the compiler produce the
251 * correct warnings when -Wcast-qual is used.
254 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
255 static struct sysinit uniquifier ## _sys_init = { \
262 DATA_SET(sysinit_set,uniquifier ## _sys_init);
264 #define SYSINIT(uniquifier, subsystem, order, func, ident) \
265 C_SYSINIT(uniquifier, subsystem, order, \
266 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
269 * Called on module unload: no special processing
271 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \
272 static struct sysinit uniquifier ## _sys_uninit = { \
278 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
280 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
281 C_SYSUNINIT(uniquifier, subsystem, order, \
282 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
284 void sysinit_add (struct sysinit **, struct sysinit **);
287 * Infrastructure for tunable 'constants'. Value may be specified at compile
288 * time or kernel load time. Rules relating tunables together can be placed
289 * in a SYSINIT function at SI_BOOT1_TUNABLES with SI_ORDER_LAST.
292 extern void tunable_int_init(void *);
298 #define TUNABLE_INT(path, var) \
299 _TUNABLE_INT((path), (var), __LINE__)
300 #define _TUNABLE_INT(path, var, line) \
301 __TUNABLE_INT((path), (var), line)
303 #define __TUNABLE_INT(path, var, line) \
304 static struct tunable_int __tunable_int_ ## line = { \
308 SYSINIT(__Tunable_init_ ## line, \
309 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
310 tunable_int_init, &__tunable_int_ ## line)
312 #define TUNABLE_INT_FETCH(path, var) kgetenv_int((path), (var))
314 /* Backwards compatibility with the old deprecated TUNABLE_INT_DECL API */
315 #define TUNABLE_INT_DECL(path, defval, var) \
316 static void __Tunable_ ## var (void *ignored) \
319 TUNABLE_INT_FETCH((path), &(var)); \
321 SYSINIT(__Tunable_init_ ## var, SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
322 __Tunable_ ## var , NULL);
324 extern void tunable_long_init(void *);
326 struct tunable_long {
330 #define TUNABLE_LONG(path, var) \
331 _TUNABLE_LONG((path), (var), __LINE__)
332 #define _TUNABLE_LONG(path, var, line) \
333 __TUNABLE_LONG((path), (var), line)
335 #define __TUNABLE_LONG(path, var, line) \
336 static struct tunable_long __tunable_long_ ## line = { \
340 SYSINIT(__Tunable_init_ ## line, \
341 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
342 tunable_long_init, &__tunable_long_ ## line)
344 #define TUNABLE_LONG_FETCH(path, var) kgetenv_long((path), (var))
346 extern void tunable_ulong_init(void *);
348 struct tunable_ulong {
352 #define TUNABLE_ULONG(path, var) \
353 _TUNABLE_ULONG((path), (var), __LINE__)
354 #define _TUNABLE_ULONG(path, var, line) \
355 __TUNABLE_ULONG((path), (var), line)
357 #define __TUNABLE_ULONG(path, var, line) \
358 static struct tunable_ulong __tunable_ulong_ ## line = {\
362 SYSINIT(__Tunable_init_ ## line, \
363 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
364 tunable_ulong_init, &__tunable_ulong_ ## line)
366 #define TUNABLE_ULONG_FETCH(path, var) kgetenv_ulong((path), (var))
368 extern void tunable_quad_init(void *);
369 struct tunable_quad {
373 #define TUNABLE_QUAD(path, var) \
374 _TUNABLE_QUAD((path), (var), __LINE__)
375 #define _TUNABLE_QUAD(path, var, line) \
376 __TUNABLE_QUAD((path), (var), line)
378 #define __TUNABLE_QUAD(path, var, line) \
379 static struct tunable_quad __tunable_quad_ ## line = { \
383 SYSINIT(__Tunable_init_ ## line, \
384 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
385 tunable_quad_init, &__tunable_quad_ ## line)
387 #define TUNABLE_QUAD_FETCH(path, var) kgetenv_quad((path), (var))
389 extern void tunable_str_init(void *);
395 #define TUNABLE_STR(path, var, size) \
396 _TUNABLE_STR((path), (var), (size), __LINE__)
397 #define _TUNABLE_STR(path, var, size, line) \
398 __TUNABLE_STR((path), (var), (size), line)
400 #define __TUNABLE_STR(path, var, size, line) \
401 static struct tunable_str __tunable_str_ ## line = { \
406 SYSINIT(__Tunable_init_ ## line, \
407 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
408 tunable_str_init, &__tunable_str_ ## line)
410 #define TUNABLE_STR_FETCH(path, var, size) \
411 kgetenv_string((path), (var), (size))
414 * Compatibility. To be deprecated after LKM is removed.
416 #ifndef _SYS_MODULE_H_
417 #include <sys/module.h>
420 #define PSEUDO_SET(sym, name) \
421 static int name ## _modevent(module_t mod, int type, void *data) \
423 void (*initfunc)(void *) = (void (*)(void *))data; \
426 /* kprintf(#name " module load\n"); */ \
430 kprintf(#name " module unload - not possible for this module type\n"); \
435 static moduledata_t name ## _mod = { \
440 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY)
442 extern struct linker_set execsw_set;
444 struct intr_config_hook {
445 TAILQ_ENTRY(intr_config_hook) ich_links;
446 void (*ich_func) (void *);
448 const char *ich_desc;
453 int config_intrhook_establish (struct intr_config_hook *);
454 void config_intrhook_disestablish (struct intr_config_hook *);
457 #endif /* !_SYS_KERNEL_H_*/