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
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.
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30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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41 * @(#)kernel.h 8.3 (Berkeley) 1/21/94
45 #ifndef _SYS_KERNEL_H_
46 #define _SYS_KERNEL_H_
48 #include <sys/linker_set.h>
52 /* for intrhook below */
53 #include <sys/queue.h>
56 #include <sys/module.h>
58 /* Global variables for the kernel. */
62 extern char hostname[MAXHOSTNAMELEN];
63 extern int hostnamelen;
64 extern char domainname[MAXHOSTNAMELEN];
65 extern int domainnamelen;
66 extern char kernelname[MAXPATHLEN];
69 extern struct timeval boottime;
71 extern struct timezone tz; /* XXX */
73 extern int tick; /* usec per tick (1000000 / hz) */
74 extern int tickadj; /* "standard" clock skew, us./tick */
75 extern int hz; /* system clock's frequency */
76 extern int psratio; /* ratio: prof / stat */
77 extern int stathz; /* statistics clock's frequency */
78 extern int profhz; /* profiling clock's frequency */
80 extern int lbolt; /* once a second sleep address */
82 extern long timedelta;
84 /* global data in mp_machdep.c */
85 extern struct mtx panic_mtx;
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 * The SI_SUB_CONSOLE and SI_SUB_SWAP values represent values used by
104 * the BSD 4.4Lite but not by FreeBSD; they are maintained in dependent
105 * order to support porting.
107 * The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of
108 * initializations to take place at splimp(). This is a historical
109 * wart that should be removed -- probably running everything at
110 * splimp() until the first init that doesn't want it is the correct
111 * fix. They are currently present to ensure historical behavior.
113 enum sysinit_sub_id {
114 SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/
115 SI_SUB_DONE = 0x0000001, /* processed*/
116 SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */
117 SI_SUB_CONSOLE = 0x0800000, /* console*/
118 SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/
119 SI_SUB_VM = 0x1000000, /* virtual memory system init*/
120 SI_SUB_KMEM = 0x1800000, /* kernel memory*/
121 SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/
122 SI_SUB_MUTEX = 0x1A80000, /* mutex (witness) fixup */
123 SI_SUB_LOCK = 0x1B00000, /* lockmgr locks */
124 SI_SUB_EVENTHANDLER = 0x1C00000, /* eventhandler init */
125 SI_SUB_CPU = 0x2000000, /* CPU resource(s)*/
126 SI_SUB_KLD = 0x2100000, /* KLD and module setup */
127 SI_SUB_INTRINSIC = 0x2200000, /* proc 0*/
128 SI_SUB_VM_CONF = 0x2300000, /* config VM, set limits*/
129 SI_SUB_RUN_QUEUE = 0x2400000, /* set up run queue*/
130 SI_SUB_CREATE_INIT = 0x2500000, /* create init process*/
131 SI_SUB_SCHED_IDLE = 0x2600000, /* required idle procs */
132 SI_SUB_MBUF = 0x2700000, /* mbuf subsystem */
133 SI_SUB_INTR = 0x2800000, /* interrupt threads */
134 SI_SUB_SOFTINTR = 0x2800001, /* start soft interrupt thread */
135 SI_SUB_DRIVERS = 0x3100000, /* Let Drivers initialize */
136 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */
137 SI_SUB_VFS = 0x4000000, /* virtual file system*/
138 SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/
139 SI_SUB_CLIST = 0x5800000, /* clists*/
140 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/
141 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/
142 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/
143 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */
144 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/
145 SI_SUB_EXEC = 0x7400000, /* execve() handlers */
146 SI_SUB_PROTO_BEGIN = 0x8000000, /* XXX: set splimp (kludge)*/
147 SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/
148 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/
149 SI_SUB_PROTO_END = 0x8ffffff, /* XXX: set splx (kludge)*/
150 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/
151 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/
152 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */
153 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */
154 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */
155 SI_SUB_VINUM = 0xb300000, /* Configure vinum */
156 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/
157 SI_SUB_SWAP = 0xc000000, /* swap*/
158 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/
159 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
160 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
161 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
162 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/
163 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
164 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
165 SI_SUB_SMP = 0xf000000, /* start the APs*/
166 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler*/
171 * Some enumerated orders; "ANY" sorts last.
173 enum sysinit_elem_order {
174 SI_ORDER_FIRST = 0x0000000, /* first*/
175 SI_ORDER_SECOND = 0x0000001, /* second*/
176 SI_ORDER_THIRD = 0x0000002, /* third*/
177 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */
178 SI_ORDER_ANY = 0xfffffff /* last*/
183 * A system initialization call instance
185 * At the moment there is one instance of sysinit. We probably do not
186 * want two which is why this code is if'd out, but we definitely want
187 * to discern SYSINIT's which take non-constant data pointers and
188 * SYSINIT's which take constant data pointers,
190 * The C_* macros take functions expecting const void * arguments
191 * while the non-C_* macros take functions expecting just void * arguments.
193 * With -Wcast-qual on, the compiler issues warnings:
194 * - if we pass non-const data or functions taking non-const data
197 * - if we pass const data to the normal macros
199 * However, no warning is issued if we pass a function taking const data
200 * through a normal non-const macro. This is ok because the function is
201 * saying it won't modify the data so we don't care whether the data is
205 typedef void (*sysinit_nfunc_t) __P((void *));
206 typedef void (*sysinit_cfunc_t) __P((const void *));
209 unsigned int subsystem; /* subsystem identifier*/
210 unsigned int order; /* init order within subsystem*/
211 sysinit_cfunc_t func; /* function */
212 const void *udata; /* multiplexer/argument */
216 * Default: no special processing
218 * The C_ version of SYSINIT is for data pointers to const
219 * data ( and functions taking data pointers to const data ).
220 * At the moment it is no different from SYSINIT and thus
221 * still results in warnings.
223 * The casts are necessary to have the compiler produce the
224 * correct warnings when -Wcast-qual is used.
227 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
228 static struct sysinit uniquifier ## _sys_init = { \
234 DATA_SET(sysinit_set,uniquifier ## _sys_init);
236 #define SYSINIT(uniquifier, subsystem, order, func, ident) \
237 C_SYSINIT(uniquifier, subsystem, order, \
238 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
241 * Called on module unload: no special processing
243 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \
244 static struct sysinit uniquifier ## _sys_uninit = { \
250 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
252 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
253 C_SYSUNINIT(uniquifier, subsystem, order, \
254 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
256 void sysinit_add __P((struct sysinit **set));
259 * Infrastructure for tunable 'constants'. Value may be specified at compile
260 * time or kernel load time. Rules relating tunables together can be placed
261 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST.
264 #define TUNABLE_INT_DECL(path, defval, var) \
265 static void __Tunable_ ## var (void *ignored) \
267 TUNABLE_INT_FETCH((path), (defval), (var)) \
269 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL);
271 #define TUNABLE_INT_FETCH(path, defval, var) \
272 if (!getenv_int((path), &(var))) \
275 #define TUNABLE_STR_DECL(path, defval, var, size) \
276 static void __Tunable_ ## var (void *ignored) \
278 TUNABLE_STR_FETCH((path), (defval), (var), (size)) \
280 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL);
282 #define TUNABLE_STR_FETCH(path, defval, var, size) \
284 tmp = getenv((path)); \
287 strncpy((var), tmp, (size)); \
288 (var)[(size) - 1] = 0;
290 struct intr_config_hook {
291 TAILQ_ENTRY(intr_config_hook) ich_links;
292 void (*ich_func) __P((void *arg));
296 int config_intrhook_establish __P((struct intr_config_hook *hook));
297 void config_intrhook_disestablish __P((struct intr_config_hook *hook));
299 #endif /* !_SYS_KERNEL_H_*/