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.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
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.
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
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 1.26 2007/04/30 07:18:56 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 tick; /* usec per tick (1000000 / hz) */
80 extern int tickadj; /* "standard" clock skew, us./tick */
81 extern int hz; /* system clock's frequency */
82 extern int psratio; /* ratio: prof / stat */
83 extern int stathz; /* statistics clock's frequency */
84 extern int profhz; /* profiling clock's frequency */
86 extern int lbolt; /* once a second sleep address */
87 extern int lbolt_syncer; /* approx 1 hz but may be sped up */
90 * Enumerated types for known system startup interfaces.
92 * Startup occurs in ascending numeric order; the list entries are
93 * sorted prior to attempting startup to guarantee order. Items
94 * of the same level are arbitrated for order based on the 'order'
97 * These numbers are arbitrary and are chosen ONLY for ordering; the
98 * enumeration values are explicit rather than implicit to provide
99 * for binary compatibility with inserted elements.
101 * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value.
103 enum sysinit_sub_id {
107 SI_SPECIAL_DUMMY = 0x0000000, /* not executed; for linker*/
108 SI_SPECIAL_DONE = 0x0000001, /* flag sysinit completion */
111 * Memory management subsystems.
113 SI_BOOT1_TUNABLES = 0x0700000, /* establish tunable values */
114 SI_BOOT1_COPYRIGHT = 0x0800000, /* first use of console*/
115 SI_BOOT1_LOCK = 0x0900000, /* lockmgr locks and tokens */
116 SI_BOOT1_VM = 0x1000000, /* virtual memory system init*/
117 SI_BOOT1_ALLOCATOR = 0x1400000, /* slab allocator */
118 SI_BOOT1_KMALLOC = 0x1600000, /* kmalloc inits */
119 SI_BOOT1_POST = 0x1800000, /* post boot1 inits */
122 * Fickle ordering. objcache and softclock need to know what
123 * ncpus is to initialize properly, clocks (e.g. hardclock)
124 * need softclock to work, and we can't finish initializing
125 * the APs until the system clock has been initialized.
126 * Also, clock registration and smp configuration registration
127 * must occur before SMP. Messy messy.
129 SI_BOOT2_LEAVE_CRIT = 0x1900000,
130 SI_BOOT2_CLOCKREG = 0x1980000, /* register available clocks */
131 SI_BOOT2_PRESMP = 0x1a00000, /* register smp configs */
132 SI_BOOT2_SMP = 0x1a80000, /* SMP startup */
133 SI_BOOT2_OBJCACHE = 0x1b00000,
134 SI_BOOT2_SOFTCLOCK = 0x1b80000,
135 SI_BOOT2_CLOCKS = 0x1c00000, /* select & start clocks */
136 SI_BOOT2_FINISH_SMP = 0x1c80000, /* SMP go (& synch clocks) */
139 * Finish up core kernel initialization and set up the process
142 SI_BOOT2_BIOS = 0x1d00000,
143 SI_BOOT2_MACHDEP = 0x1d80000,
144 SI_BOOT2_KLD = 0x1e00000,
145 SI_BOOT2_USCHED = 0x1e80000,
146 SI_BOOT2_PROC0 = 0x1f00000,
149 * Continue with miscellanious system initialization
151 SI_SUB_CREATE_INIT = 0x2300000, /* create the init process */
152 SI_SUB_DRIVERS = 0x2400000, /* Let Drivers initialize */
153 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */
154 SI_SUB_VFS = 0x4000000, /* virtual file system*/
155 SI_SUB_HELPER_THREADS = 0x5400000, /* misc helper threads */
156 SI_SUB_CLIST = 0x5800000, /* clists*/
157 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/
158 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/
159 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/
160 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */
161 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/
162 SI_SUB_EXEC = 0x7400000, /* execve() handlers */
163 SI_SUB_PROTO_BEGIN = 0x8000000, /* network protocol pre-init */
164 SI_SUB_PROTO_IF = 0x8400000, /* interfaces */
165 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/
166 SI_SUB_PROTO_IFATTACHDOMAIN
167 = 0x8800001, /* domain dependent data init */
168 SI_SUB_PROTO_END = 0x8ffffff, /* network protocol post-init */
169 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/
170 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/
171 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */
174 * Root filesystem setup, finish up with the major system
177 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */
178 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */
179 SI_SUB_RAID = 0xb300000, /* Configure vinum */
180 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/
181 SI_SUB_PROC0_POST = 0xd000000, /* proc 0 cleanup*/
182 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
183 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
184 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
185 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/
186 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
187 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
188 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/
193 * Some enumerated orders; "ANY" sorts last.
195 enum sysinit_elem_order {
196 SI_ORDER_FIRST = 0x0000000, /* first*/
197 SI_ORDER_SECOND = 0x0000001, /* second*/
198 SI_ORDER_THIRD = 0x0000002, /* third*/
199 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */
200 SI_ORDER_ANY = 0xfffffff /* last*/
205 * A system initialization call instance
207 * At the moment there is one instance of sysinit. We probably do not
208 * want two which is why this code is if'd out, but we definitely want
209 * to discern SYSINIT's which take non-constant data pointers and
210 * SYSINIT's which take constant data pointers,
212 * The C_* macros take functions expecting const void * arguments
213 * while the non-C_* macros take functions expecting just void * arguments.
215 * With -Wcast-qual on, the compiler issues warnings:
216 * - if we pass non-const data or functions taking non-const data
219 * - if we pass const data to the normal macros
221 * However, no warning is issued if we pass a function taking const data
222 * through a normal non-const macro. This is ok because the function is
223 * saying it won't modify the data so we don't care whether the data is
227 typedef void (*sysinit_nfunc_t) (void *);
228 typedef void (*sysinit_cfunc_t) (const void *);
231 unsigned int subsystem; /* subsystem identifier*/
232 unsigned int order; /* init order within subsystem*/
233 sysinit_cfunc_t func; /* function */
234 const void *udata; /* multiplexer/argument */
238 * Default: no special processing
240 * The C_ version of SYSINIT is for data pointers to const
241 * data ( and functions taking data pointers to const data ).
242 * At the moment it is no different from SYSINIT and thus
243 * still results in warnings.
245 * The casts are necessary to have the compiler produce the
246 * correct warnings when -Wcast-qual is used.
249 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
250 static struct sysinit uniquifier ## _sys_init = { \
256 DATA_SET(sysinit_set,uniquifier ## _sys_init);
258 #define SYSINIT(uniquifier, subsystem, order, func, ident) \
259 C_SYSINIT(uniquifier, subsystem, order, \
260 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
263 * Called on module unload: no special processing
265 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \
266 static struct sysinit uniquifier ## _sys_uninit = { \
272 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
274 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
275 C_SYSUNINIT(uniquifier, subsystem, order, \
276 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
278 void sysinit_add (struct sysinit **, struct sysinit **);
281 * Infrastructure for tunable 'constants'. Value may be specified at compile
282 * time or kernel load time. Rules relating tunables together can be placed
283 * in a SYSINIT function at SI_BOOT1_TUNABLES with SI_ORDER_LAST.
286 extern void tunable_int_init(void *);
292 #define TUNABLE_INT(path, var) \
293 _TUNABLE_INT((path), (var), __LINE__)
294 #define _TUNABLE_INT(path, var, line) \
295 __TUNABLE_INT((path), (var), line)
297 #define __TUNABLE_INT(path, var, line) \
298 static struct tunable_int __tunable_int_ ## line = { \
302 SYSINIT(__Tunable_init_ ## line, \
303 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
304 tunable_int_init, &__tunable_int_ ## line)
306 #define TUNABLE_INT_FETCH(path, var) kgetenv_int((path), (var))
308 /* Backwards compatibility with the old deprecated TUNABLE_INT_DECL API */
309 #define TUNABLE_INT_DECL(path, defval, var) \
310 static void __Tunable_ ## var (void *ignored) \
313 TUNABLE_INT_FETCH((path), &(var)); \
315 SYSINIT(__Tunable_init_ ## var, SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
316 __Tunable_ ## var , NULL);
318 extern void tunable_quad_init(void *);
319 struct tunable_quad {
323 #define TUNABLE_QUAD(path, var) \
324 _TUNABLE_QUAD((path), (var), __LINE__)
325 #define _TUNABLE_QUAD(path, var, line) \
326 __TUNABLE_QUAD((path), (var), line)
328 #define __TUNABLE_QUAD(path, var, line) \
329 static struct tunable_quad __tunable_quad_ ## line = { \
333 SYSINIT(__Tunable_init_ ## line, \
334 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
335 tunable_quad_init, &__tunable_quad_ ## line)
337 #define TUNABLE_QUAD_FETCH(path, var) kgetenv_quad((path), (var))
339 extern void tunable_str_init(void *);
345 #define TUNABLE_STR(path, var, size) \
346 _TUNABLE_STR((path), (var), (size), __LINE__)
347 #define _TUNABLE_STR(path, var, size, line) \
348 __TUNABLE_STR((path), (var), (size), line)
350 #define __TUNABLE_STR(path, var, size, line) \
351 static struct tunable_str __tunable_str_ ## line = { \
356 SYSINIT(__Tunable_init_ ## line, \
357 SI_BOOT1_TUNABLES, SI_ORDER_MIDDLE, \
358 tunable_str_init, &__tunable_str_ ## line)
360 #define TUNABLE_STR_FETCH(path, var, size) \
361 kgetenv_string((path), (var), (size))
364 * Compatibility. To be deprecated after LKM is removed.
366 #ifndef _SYS_MODULE_H_
367 #include <sys/module.h>
370 #define PSEUDO_SET(sym, name) \
371 static int name ## _modevent(module_t mod, int type, void *data) \
373 void (*initfunc)(void *) = (void (*)(void *))data; \
376 /* kprintf(#name " module load\n"); */ \
380 kprintf(#name " module unload - not possible for this module type\n"); \
385 static moduledata_t name ## _mod = { \
390 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY)
392 extern struct linker_set execsw_set;
394 struct intr_config_hook {
395 TAILQ_ENTRY(intr_config_hook) ich_links;
396 void (*ich_func) (void *);
398 const char *ich_desc;
401 int config_intrhook_establish (struct intr_config_hook *);
402 void config_intrhook_disestablish (struct intr_config_hook *);
405 #endif /* !_SYS_KERNEL_H_*/