Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/kernel.h
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
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1 /*- 2 * Copyright (c) 1995 Terrence R. Lambert 3 * All rights reserved. 4 * 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. 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 * @(#)kernel.h 8.3 (Berkeley) 1/21/94 42 * $FreeBSD$ 43 */ 44 45 #ifndef _SYS_KERNEL_H_ 46 #define _SYS_KERNEL_H_ 47 48 #include <sys/linker_set.h> 49 50 #ifdef _KERNEL 51 52 /* for intrhook below */ 53 #include <sys/queue.h> 54 55 /* Global variables for the kernel. */ 56 57 /* 1.1 */ 58 extern unsigned long hostid; 59 extern char hostname[MAXHOSTNAMELEN]; 60 extern int hostnamelen; 61 extern char domainname[MAXHOSTNAMELEN]; 62 extern int domainnamelen; 63 extern char kernelname[MAXPATHLEN]; 64 65 /* 1.2 */ 66 extern struct timeval boottime; 67 68 extern struct timezone tz; /* XXX */ 69 70 extern int tick; /* usec per tick (1000000 / hz) */ 71 extern int tickadj; /* "standard" clock skew, us./tick */ 72 extern int hz; /* system clock's frequency */ 73 extern int psratio; /* ratio: prof / stat */ 74 extern int stathz; /* statistics clock's frequency */ 75 extern int profhz; /* profiling clock's frequency */ 76 extern int ticks; 77 extern int lbolt; /* once a second sleep address */ 78 extern int tickdelta; 79 extern long timedelta; 80 81 #endif /* _KERNEL */ 82 83 /* 84 * Enumerated types for known system startup interfaces. 85 * 86 * Startup occurs in ascending numeric order; the list entries are 87 * sorted prior to attempting startup to guarantee order. Items 88 * of the same level are arbitrated for order based on the 'order' 89 * element. 90 * 91 * These numbers are arbitrary and are chosen ONLY for ordering; the 92 * enumeration values are explicit rather than implicit to provide 93 * for binary compatibility with inserted elements. 94 * 95 * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value. 96 * 97 * The SI_SUB_CONSOLE and SI_SUB_SWAP values represent values used by 98 * the BSD 4.4Lite but not by FreeBSD; they are maintained in dependent 99 * order to support porting. 100 * 101 * The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of 102 * initializations to take place at splimp(). This is a historical 103 * wart that should be removed -- probably running everything at 104 * splimp() until the first init that doesn't want it is the correct 105 * fix. They are currently present to ensure historical behavior. 106 */ 107 enum sysinit_sub_id { 108 SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/ 109 SI_SUB_DONE = 0x0000001, /* processed*/ 110 SI_SUB_CONSOLE = 0x0800000, /* console*/ 111 SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/ 112 SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */ 113 SI_SUB_VM = 0x1000000, /* virtual memory system init*/ 114 SI_SUB_KMEM = 0x1800000, /* kernel memory*/ 115 SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/ 116 SI_SUB_CPU = 0x1e00000, /* CPU resource(s)*/ 117 SI_SUB_KLD = 0x1f00000, /* KLD and module setup */ 118 SI_SUB_INTRINSIC = 0x2000000, /* proc 0*/ 119 SI_SUB_VM_CONF = 0x2100000, /* config VM, set limits*/ 120 SI_SUB_RUN_QUEUE = 0x2200000, /* the run queue*/ 121 SI_SUB_CREATE_INIT = 0x2300000, /* create the init process */ 122 SI_SUB_MBUF = 0x2380000, /* mbuf subsystem */ 123 SI_SUB_DRIVERS = 0x2400000, /* Let Drivers initialize */ 124 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */ 125 SI_SUB_VFS = 0x4000000, /* virtual file system*/ 126 SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/ 127 SI_SUB_CLIST = 0x5800000, /* clists*/ 128 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/ 129 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/ 130 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/ 131 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */ 132 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/ 133 SI_SUB_EXEC = 0x7400000, /* execve() handlers */ 134 SI_SUB_PROTO_BEGIN = 0x8000000, /* XXX: set splimp (kludge)*/ 135 SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/ 136 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/ 137 SI_SUB_PROTO_END = 0x8ffffff, /* XXX: set splx (kludge)*/ 138 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/ 139 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/ 140 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */ 141 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */ 142 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */ 143 SI_SUB_VINUM = 0xb300000, /* Configure vinum */ 144 SI_SUB_RAID = 0xb380000, /* Configure RAIDframe */ 145 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/ 146 SI_SUB_SWAP = 0xc000000, /* swap*/ 147 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/ 148 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/ 149 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/ 150 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/ 151 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/ 152 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/ 153 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/ 154 SI_SUB_SMP = 0xf000000, /* idle procs*/ 155 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/ 156 }; 157 158 159 /* 160 * Some enumerated orders; "ANY" sorts last. 161 */ 162 enum sysinit_elem_order { 163 SI_ORDER_FIRST = 0x0000000, /* first*/ 164 SI_ORDER_SECOND = 0x0000001, /* second*/ 165 SI_ORDER_THIRD = 0x0000002, /* third*/ 166 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */ 167 SI_ORDER_ANY = 0xfffffff /* last*/ 168 }; 169 170 171 /* 172 * A system initialization call instance 173 * 174 * At the moment there is one instance of sysinit. We probably do not 175 * want two which is why this code is if'd out, but we definitely want 176 * to discern SYSINIT's which take non-constant data pointers and 177 * SYSINIT's which take constant data pointers, 178 * 179 * The C_* macros take functions expecting const void * arguments 180 * while the non-C_* macros take functions expecting just void * arguments. 181 * 182 * With -Wcast-qual on, the compiler issues warnings: 183 * - if we pass non-const data or functions taking non-const data 184 * to a C_* macro. 185 * 186 * - if we pass const data to the normal macros 187 * 188 * However, no warning is issued if we pass a function taking const data 189 * through a normal non-const macro. This is ok because the function is 190 * saying it won't modify the data so we don't care whether the data is 191 * modifiable or not. 192 */ 193 194 typedef void (*sysinit_nfunc_t) __P((void *)); 195 typedef void (*sysinit_cfunc_t) __P((const void *)); 196 197 struct sysinit { 198 unsigned int subsystem; /* subsystem identifier*/ 199 unsigned int order; /* init order within subsystem*/ 200 sysinit_cfunc_t func; /* function */ 201 const void *udata; /* multiplexer/argument */ 202 }; 203 204 /* 205 * Default: no special processing 206 * 207 * The C_ version of SYSINIT is for data pointers to const 208 * data ( and functions taking data pointers to const data ). 209 * At the moment it is no different from SYSINIT and thus 210 * still results in warnings. 211 * 212 * The casts are necessary to have the compiler produce the 213 * correct warnings when -Wcast-qual is used. 214 * 215 */ 216 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ 217 static struct sysinit uniquifier ## _sys_init = { \ 218 subsystem, \ 219 order, \ 220 func, \ 221 ident \ 222 }; \ 223 DATA_SET(sysinit_set,uniquifier ## _sys_init); 224 225 #define SYSINIT(uniquifier, subsystem, order, func, ident) \ 226 C_SYSINIT(uniquifier, subsystem, order, \ 227 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 228 229 /* 230 * Called on module unload: no special processing 231 */ 232 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 233 static struct sysinit uniquifier ## _sys_uninit = { \ 234 subsystem, \ 235 order, \ 236 func, \ 237 ident \ 238 }; \ 239 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit) 240 241 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 242 C_SYSUNINIT(uniquifier, subsystem, order, \ 243 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 244 245 void sysinit_add __P((struct sysinit **set)); 246 247 /* 248 * Infrastructure for tunable 'constants'. Value may be specified at compile 249 * time or kernel load time. Rules relating tunables together can be placed 250 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST. 251 */ 252 253 extern void tunable_int_init(void *); 254 struct tunable_int { 255 const char *path; 256 int *var; 257 }; 258 #define TUNABLE_INT(path, var) \ 259 _TUNABLE_INT((path), (var), __LINE__) 260 #define _TUNABLE_INT(path, var, line) \ 261 __TUNABLE_INT((path), (var), line) 262 263 #define __TUNABLE_INT(path, var, line) \ 264 static struct tunable_int __tunable_int_ ## line = { \ 265 path, \ 266 var, \ 267 }; \ 268 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 269 tunable_int_init, &__tunable_int_ ## line) 270 271 #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var)) 272 273 /* Backwards compatability with the old deprecated TUNABLE_INT_DECL API */ 274 #define TUNABLE_INT_DECL(path, defval, var) \ 275 static void __Tunable_ ## var (void *ignored) \ 276 { \ 277 (var) = (defval); \ 278 TUNABLE_INT_FETCH((path), &(var)); \ 279 } \ 280 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL); 281 282 extern void tunable_quad_init(void *); 283 struct tunable_quad { 284 const char *path; 285 quad_t *var; 286 }; 287 #define TUNABLE_QUAD(path, var) \ 288 _TUNABLE_QUAD((path), (var), __LINE__) 289 #define _TUNABLE_QUAD(path, var, line) \ 290 __TUNABLE_QUAD((path), (var), line) 291 292 #define __TUNABLE_QUAD(path, var, line) \ 293 static struct tunable_quad __tunable_quad_ ## line = { \ 294 path, \ 295 var, \ 296 }; \ 297 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 298 tunable_quad_init, &__tunable_quad_ ## line) 299 300 #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var)) 301 302 extern void tunable_str_init(void *); 303 struct tunable_str { 304 const char *path; 305 char *var; 306 int size; 307 }; 308 #define TUNABLE_STR(path, var, size) \ 309 _TUNABLE_STR((path), (var), (size), __LINE__) 310 #define _TUNABLE_STR(path, var, size, line) \ 311 __TUNABLE_STR((path), (var), (size), line) 312 313 #define __TUNABLE_STR(path, var, size, line) \ 314 static struct tunable_str __tunable_str_ ## line = { \ 315 path, \ 316 var, \ 317 size, \ 318 }; \ 319 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 320 tunable_str_init, &__tunable_str_ ## line) 321 322 #define TUNABLE_STR_FETCH(path, var, size) \ 323 getenv_string((path), (var), (size)) 324 325 /* 326 * Compatibility. To be deprecated after LKM is removed. 327 */ 328 #include <sys/module.h> 329 #define PSEUDO_SET(sym, name) \ 330 static int name ## _modevent(module_t mod, int type, void *data) \ 331 { \ 332 void (*initfunc)(void *) = (void (*)(void *))data; \ 333 switch (type) { \ 334 case MOD_LOAD: \ 335 /* printf(#name " module load\n"); */ \ 336 initfunc(NULL); \ 337 break; \ 338 case MOD_UNLOAD: \ 339 printf(#name " module unload - not possible for this module type\n"); \ 340 return EINVAL; \ 341 } \ 342 return 0; \ 343 } \ 344 static moduledata_t name ## _mod = { \ 345 #name, \ 346 name ## _modevent, \ 347 (void *)sym \ 348 }; \ 349 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY) 350 351 extern struct linker_set execsw_set; 352 353 354 355 356 struct intr_config_hook { 357 TAILQ_ENTRY(intr_config_hook) ich_links; 358 void (*ich_func) __P((void *arg)); 359 void *ich_arg; 360 }; 361 362 int config_intrhook_establish __P((struct intr_config_hook *hook)); 363 void config_intrhook_disestablish __P((struct intr_config_hook *hook)); 364 365 #endif /* !_SYS_KERNEL_H_*/
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