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: 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 1.11 2004/03/30 17:18:58 joerg Exp $ 44 */ 45 46 #ifndef _SYS_KERNEL_H_ 47 #define _SYS_KERNEL_H_ 48 49 #include <sys/linker_set.h> 50 51 #ifdef _KERNEL 52 53 /* for intrhook below */ 54 #include <sys/queue.h> 55 56 /* Global variables for the kernel. */ 57 58 /* 1.1 */ 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]; 65 66 /* 1.2 */ 67 extern struct timespec boottime; 68 extern struct timespec basetime; 69 70 extern struct timezone tz; /* XXX */ 71 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 */ 78 extern int ticks; 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 */ 83 84 #endif /* _KERNEL */ 85 86 /* 87 * Enumerated types for known system startup interfaces. 88 * 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' 92 * element. 93 * 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. 97 * 98 * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value. 99 * 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. 103 * 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. 109 */ 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_END = 0x8ffffff, /* XXX: set splx (kludge)*/ 144 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/ 145 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/ 146 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */ 147 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */ 148 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */ 149 SI_SUB_RAID = 0xb300000, /* Configure vinum */ 150 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/ 151 SI_SUB_SWAP = 0xc000000, /* swap*/ 152 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/ 153 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/ 154 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/ 155 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/ 156 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/ 157 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/ 158 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/ 159 SI_SUB_SMP = 0xf000000, /* idle procs*/ 160 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/ 161 }; 162 163 164 /* 165 * Some enumerated orders; "ANY" sorts last. 166 */ 167 enum sysinit_elem_order { 168 SI_ORDER_FIRST = 0x0000000, /* first*/ 169 SI_ORDER_SECOND = 0x0000001, /* second*/ 170 SI_ORDER_THIRD = 0x0000002, /* third*/ 171 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */ 172 SI_ORDER_ANY = 0xfffffff /* last*/ 173 }; 174 175 176 /* 177 * A system initialization call instance 178 * 179 * At the moment there is one instance of sysinit. We probably do not 180 * want two which is why this code is if'd out, but we definitely want 181 * to discern SYSINIT's which take non-constant data pointers and 182 * SYSINIT's which take constant data pointers, 183 * 184 * The C_* macros take functions expecting const void * arguments 185 * while the non-C_* macros take functions expecting just void * arguments. 186 * 187 * With -Wcast-qual on, the compiler issues warnings: 188 * - if we pass non-const data or functions taking non-const data 189 * to a C_* macro. 190 * 191 * - if we pass const data to the normal macros 192 * 193 * However, no warning is issued if we pass a function taking const data 194 * through a normal non-const macro. This is ok because the function is 195 * saying it won't modify the data so we don't care whether the data is 196 * modifiable or not. 197 */ 198 199 typedef void (*sysinit_nfunc_t) (void *); 200 typedef void (*sysinit_cfunc_t) (const void *); 201 202 struct sysinit { 203 unsigned int subsystem; /* subsystem identifier*/ 204 unsigned int order; /* init order within subsystem*/ 205 sysinit_cfunc_t func; /* function */ 206 const void *udata; /* multiplexer/argument */ 207 }; 208 209 /* 210 * Default: no special processing 211 * 212 * The C_ version of SYSINIT is for data pointers to const 213 * data ( and functions taking data pointers to const data ). 214 * At the moment it is no different from SYSINIT and thus 215 * still results in warnings. 216 * 217 * The casts are necessary to have the compiler produce the 218 * correct warnings when -Wcast-qual is used. 219 * 220 */ 221 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ 222 static struct sysinit uniquifier ## _sys_init = { \ 223 subsystem, \ 224 order, \ 225 func, \ 226 ident \ 227 }; \ 228 DATA_SET(sysinit_set,uniquifier ## _sys_init); 229 230 #define SYSINIT(uniquifier, subsystem, order, func, ident) \ 231 C_SYSINIT(uniquifier, subsystem, order, \ 232 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 233 234 /* 235 * Called on module unload: no special processing 236 */ 237 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 238 static struct sysinit uniquifier ## _sys_uninit = { \ 239 subsystem, \ 240 order, \ 241 func, \ 242 ident \ 243 }; \ 244 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit) 245 246 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 247 C_SYSUNINIT(uniquifier, subsystem, order, \ 248 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 249 250 void sysinit_add (struct sysinit **, struct sysinit **); 251 252 /* 253 * Infrastructure for tunable 'constants'. Value may be specified at compile 254 * time or kernel load time. Rules relating tunables together can be placed 255 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST. 256 */ 257 258 extern void tunable_int_init(void *); 259 struct tunable_int { 260 const char *path; 261 int *var; 262 }; 263 #define TUNABLE_INT(path, var) \ 264 _TUNABLE_INT((path), (var), __LINE__) 265 #define _TUNABLE_INT(path, var, line) \ 266 __TUNABLE_INT((path), (var), line) 267 268 #define __TUNABLE_INT(path, var, line) \ 269 static struct tunable_int __tunable_int_ ## line = { \ 270 path, \ 271 var, \ 272 }; \ 273 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 274 tunable_int_init, &__tunable_int_ ## line) 275 276 #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var)) 277 278 /* Backwards compatibility with the old deprecated TUNABLE_INT_DECL API */ 279 #define TUNABLE_INT_DECL(path, defval, var) \ 280 static void __Tunable_ ## var (void *ignored) \ 281 { \ 282 (var) = (defval); \ 283 TUNABLE_INT_FETCH((path), &(var)); \ 284 } \ 285 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL); 286 287 extern void tunable_quad_init(void *); 288 struct tunable_quad { 289 const char *path; 290 quad_t *var; 291 }; 292 #define TUNABLE_QUAD(path, var) \ 293 _TUNABLE_QUAD((path), (var), __LINE__) 294 #define _TUNABLE_QUAD(path, var, line) \ 295 __TUNABLE_QUAD((path), (var), line) 296 297 #define __TUNABLE_QUAD(path, var, line) \ 298 static struct tunable_quad __tunable_quad_ ## line = { \ 299 path, \ 300 var, \ 301 }; \ 302 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 303 tunable_quad_init, &__tunable_quad_ ## line) 304 305 #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var)) 306 307 extern void tunable_str_init(void *); 308 struct tunable_str { 309 const char *path; 310 char *var; 311 int size; 312 }; 313 #define TUNABLE_STR(path, var, size) \ 314 _TUNABLE_STR((path), (var), (size), __LINE__) 315 #define _TUNABLE_STR(path, var, size, line) \ 316 __TUNABLE_STR((path), (var), (size), line) 317 318 #define __TUNABLE_STR(path, var, size, line) \ 319 static struct tunable_str __tunable_str_ ## line = { \ 320 path, \ 321 var, \ 322 size, \ 323 }; \ 324 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 325 tunable_str_init, &__tunable_str_ ## line) 326 327 #define TUNABLE_STR_FETCH(path, var, size) \ 328 getenv_string((path), (var), (size)) 329 330 /* 331 * Compatibility. To be deprecated after LKM is removed. 332 */ 333 #include <sys/module.h> 334 #define PSEUDO_SET(sym, name) \ 335 static int name ## _modevent(module_t mod, int type, void *data) \ 336 { \ 337 void (*initfunc)(void *) = (void (*)(void *))data; \ 338 switch (type) { \ 339 case MOD_LOAD: \ 340 /* printf(#name " module load\n"); */ \ 341 initfunc(NULL); \ 342 break; \ 343 case MOD_UNLOAD: \ 344 printf(#name " module unload - not possible for this module type\n"); \ 345 return EINVAL; \ 346 } \ 347 return 0; \ 348 } \ 349 static moduledata_t name ## _mod = { \ 350 #name, \ 351 name ## _modevent, \ 352 (void *)sym \ 353 }; \ 354 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY) 355 356 extern struct linker_set execsw_set; 357 358 359 360 361 struct intr_config_hook { 362 TAILQ_ENTRY(intr_config_hook) ich_links; 363 void (*ich_func) (void *); 364 void *ich_arg; 365 }; 366 367 int config_intrhook_establish (struct intr_config_hook *); 368 void config_intrhook_disestablish (struct intr_config_hook *); 369 370 #endif /* !_SYS_KERNEL_H_*/ 371