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.
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9 * to the University of California by American Telephone and Telegraph
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23 * This product includes software developed by the University of
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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 1.13 2005/02/04 02:55:38 dillon Exp $
46 #ifndef _SYS_KERNEL_H_
47 #define _SYS_KERNEL_H_
49 #include <sys/linker_set.h>
53 /* for intrhook below */
54 #include <sys/queue.h>
56 /* Global variables for the kernel. */
59 extern unsigned long hostid;
60 extern char hostname[MAXHOSTNAMELEN];
61 extern int hostnamelen;
62 extern char domainname[MAXHOSTNAMELEN];
63 extern int domainnamelen;
64 extern char kernelname[MAXPATHLEN];
67 extern struct timespec boottime;
68 extern struct timespec basetime;
70 extern struct timezone tz; /* XXX */
72 extern int tick; /* usec per tick (1000000 / hz) */
73 extern int tickadj; /* "standard" clock skew, us./tick */
74 extern int hz; /* system clock's frequency */
75 extern int psratio; /* ratio: prof / stat */
76 extern int stathz; /* statistics clock's frequency */
77 extern int profhz; /* profiling clock's frequency */
79 extern int lbolt; /* once a second sleep address */
80 extern int tickdelta; /* make this correction */
81 extern long timedelta; /* until this aggregate is exhausted */
82 extern int tickpll; /* scaled tick adjustment */
87 * Enumerated types for known system startup interfaces.
89 * Startup occurs in ascending numeric order; the list entries are
90 * sorted prior to attempting startup to guarantee order. Items
91 * of the same level are arbitrated for order based on the 'order'
94 * These numbers are arbitrary and are chosen ONLY for ordering; the
95 * enumeration values are explicit rather than implicit to provide
96 * for binary compatibility with inserted elements.
98 * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value.
100 * The SI_SUB_CONSOLE and SI_SUB_SWAP values represent values used by
101 * the BSD 4.4Lite but not by FreeBSD; they are maintained in dependent
102 * order to support porting.
104 * The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of
105 * initializations to take place at splimp(). This is a historical
106 * wart that should be removed -- probably running everything at
107 * splimp() until the first init that doesn't want it is the correct
108 * fix. They are currently present to ensure historical behavior.
110 enum sysinit_sub_id {
111 SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/
112 SI_SUB_DONE = 0x0000001, /* processed*/
113 SI_SUB_CONSOLE = 0x0800000, /* console*/
114 SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/
115 SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */
116 SI_SUB_LOCK = 0x0900000, /* lockmgr locks and tokens */
117 SI_SUB_VM = 0x1000000, /* virtual memory system init*/
118 SI_SUB_KMEM = 0x1800000, /* kernel memory*/
119 SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/
120 SI_SUB_CPU = 0x1e00000, /* CPU resource(s)*/
121 SI_SUB_KLD = 0x1f00000, /* KLD and module setup */
122 SI_SUB_INTRINSIC = 0x2000000, /* proc 0*/
123 SI_SUB_VM_CONF = 0x2100000, /* config VM, set limits*/
124 SI_SUB_RUN_QUEUE = 0x2200000, /* the run queue*/
125 SI_SUB_CREATE_INIT = 0x2300000, /* create the init process */
126 SI_SUB_MBUF = 0x2380000, /* mbuf subsystem */
127 SI_SUB_LEAVE_CRIT = 0x23c0000, /* allow interrupt operation */
128 SI_SUB_DRIVERS = 0x2400000, /* Let Drivers initialize */
129 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */
130 SI_SUB_VFS = 0x4000000, /* virtual file system*/
131 SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/
132 SI_SUB_FINISH_SMP = 0x5000000, /* finish setting up cpus */
133 SI_SUB_CLIST = 0x5800000, /* clists*/
134 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/
135 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/
136 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/
137 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */
138 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/
139 SI_SUB_EXEC = 0x7400000, /* execve() handlers */
140 SI_SUB_PROTO_BEGIN = 0x8000000, /* XXX: set splimp (kludge)*/
141 SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/
142 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/
143 SI_SUB_PROTO_IFATTACHDOMAIN = 0x8800001, /* domain dependent data init */
144 SI_SUB_PROTO_END = 0x8ffffff, /* XXX: set splx (kludge)*/
145 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/
146 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/
147 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */
148 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */
149 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */
150 SI_SUB_RAID = 0xb300000, /* Configure vinum */
151 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/
152 SI_SUB_SWAP = 0xc000000, /* swap*/
153 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/
154 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
155 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
156 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
157 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/
158 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
159 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
160 SI_SUB_SMP = 0xf000000, /* idle procs*/
161 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/
166 * Some enumerated orders; "ANY" sorts last.
168 enum sysinit_elem_order {
169 SI_ORDER_FIRST = 0x0000000, /* first*/
170 SI_ORDER_SECOND = 0x0000001, /* second*/
171 SI_ORDER_THIRD = 0x0000002, /* third*/
172 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */
173 SI_ORDER_ANY = 0xfffffff /* last*/
178 * A system initialization call instance
180 * At the moment there is one instance of sysinit. We probably do not
181 * want two which is why this code is if'd out, but we definitely want
182 * to discern SYSINIT's which take non-constant data pointers and
183 * SYSINIT's which take constant data pointers,
185 * The C_* macros take functions expecting const void * arguments
186 * while the non-C_* macros take functions expecting just void * arguments.
188 * With -Wcast-qual on, the compiler issues warnings:
189 * - if we pass non-const data or functions taking non-const data
192 * - if we pass const data to the normal macros
194 * However, no warning is issued if we pass a function taking const data
195 * through a normal non-const macro. This is ok because the function is
196 * saying it won't modify the data so we don't care whether the data is
200 typedef void (*sysinit_nfunc_t) (void *);
201 typedef void (*sysinit_cfunc_t) (const void *);
204 unsigned int subsystem; /* subsystem identifier*/
205 unsigned int order; /* init order within subsystem*/
206 sysinit_cfunc_t func; /* function */
207 const void *udata; /* multiplexer/argument */
211 * Default: no special processing
213 * The C_ version of SYSINIT is for data pointers to const
214 * data ( and functions taking data pointers to const data ).
215 * At the moment it is no different from SYSINIT and thus
216 * still results in warnings.
218 * The casts are necessary to have the compiler produce the
219 * correct warnings when -Wcast-qual is used.
222 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
223 static struct sysinit uniquifier ## _sys_init = { \
229 DATA_SET(sysinit_set,uniquifier ## _sys_init);
231 #define SYSINIT(uniquifier, subsystem, order, func, ident) \
232 C_SYSINIT(uniquifier, subsystem, order, \
233 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
236 * Called on module unload: no special processing
238 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \
239 static struct sysinit uniquifier ## _sys_uninit = { \
245 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
247 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
248 C_SYSUNINIT(uniquifier, subsystem, order, \
249 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
251 void sysinit_add (struct sysinit **, struct sysinit **);
254 * Infrastructure for tunable 'constants'. Value may be specified at compile
255 * time or kernel load time. Rules relating tunables together can be placed
256 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST.
259 extern void tunable_int_init(void *);
264 #define TUNABLE_INT(path, var) \
265 _TUNABLE_INT((path), (var), __LINE__)
266 #define _TUNABLE_INT(path, var, line) \
267 __TUNABLE_INT((path), (var), line)
269 #define __TUNABLE_INT(path, var, line) \
270 static struct tunable_int __tunable_int_ ## line = { \
274 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
275 tunable_int_init, &__tunable_int_ ## line)
277 #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var))
279 /* Backwards compatibility with the old deprecated TUNABLE_INT_DECL API */
280 #define TUNABLE_INT_DECL(path, defval, var) \
281 static void __Tunable_ ## var (void *ignored) \
284 TUNABLE_INT_FETCH((path), &(var)); \
286 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL);
288 extern void tunable_quad_init(void *);
289 struct tunable_quad {
293 #define TUNABLE_QUAD(path, var) \
294 _TUNABLE_QUAD((path), (var), __LINE__)
295 #define _TUNABLE_QUAD(path, var, line) \
296 __TUNABLE_QUAD((path), (var), line)
298 #define __TUNABLE_QUAD(path, var, line) \
299 static struct tunable_quad __tunable_quad_ ## line = { \
303 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
304 tunable_quad_init, &__tunable_quad_ ## line)
306 #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var))
308 extern void tunable_str_init(void *);
314 #define TUNABLE_STR(path, var, size) \
315 _TUNABLE_STR((path), (var), (size), __LINE__)
316 #define _TUNABLE_STR(path, var, size, line) \
317 __TUNABLE_STR((path), (var), (size), line)
319 #define __TUNABLE_STR(path, var, size, line) \
320 static struct tunable_str __tunable_str_ ## line = { \
325 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
326 tunable_str_init, &__tunable_str_ ## line)
328 #define TUNABLE_STR_FETCH(path, var, size) \
329 getenv_string((path), (var), (size))
332 * Compatibility. To be deprecated after LKM is removed.
334 #include <sys/module.h>
335 #define PSEUDO_SET(sym, name) \
336 static int name ## _modevent(module_t mod, int type, void *data) \
338 void (*initfunc)(void *) = (void (*)(void *))data; \
341 /* printf(#name " module load\n"); */ \
345 printf(#name " module unload - not possible for this module type\n"); \
350 static moduledata_t name ## _mod = { \
355 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY)
357 extern struct linker_set execsw_set;
362 struct intr_config_hook {
363 TAILQ_ENTRY(intr_config_hook) ich_links;
364 void (*ich_func) (void *);
366 const char *ich_desc;
369 int config_intrhook_establish (struct intr_config_hook *);
370 void config_intrhook_disestablish (struct intr_config_hook *);
372 #endif /* !_SYS_KERNEL_H_*/