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 1.19 2006/01/25 19:56:23 dillon 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 69 extern struct timezone tz; /* XXX */ 70 71 extern int tick; /* usec per tick (1000000 / hz) */ 72 extern int tickadj; /* "standard" clock skew, us./tick */ 73 extern int hz; /* system clock's frequency */ 74 extern int psratio; /* ratio: prof / stat */ 75 extern int stathz; /* statistics clock's frequency */ 76 extern int profhz; /* profiling clock's frequency */ 77 extern int ticks; 78 extern int lbolt; /* once a second sleep address */ 79 extern int lbolt_syncer; /* approx 1 hz but may be sped up */ 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 enum sysinit_sub_id { 102 SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/ 103 SI_SUB_DONE = 0x0000001, /* processed*/ 104 SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */ 105 SI_SUB_CONSOLE = 0x0800000, /* console*/ 106 SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/ 107 SI_SUB_LOCK = 0x0900000, /* lockmgr locks and tokens */ 108 SI_SUB_VM = 0x1000000, /* virtual memory system init*/ 109 SI_SUB_KMEM = 0x1800000, /* kernel memory*/ 110 SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/ 111 SI_SUB_CPU = 0x1e00000, /* CPU resource(s)*/ 112 SI_SUB_KLD = 0x1f00000, /* KLD and module setup */ 113 SI_SUB_INTRINSIC = 0x2000000, /* proc 0*/ 114 SI_SUB_VM_CONF = 0x2100000, /* config VM, set limits*/ 115 SI_SUB_RUN_QUEUE = 0x2200000, /* the run queue*/ 116 SI_SUB_CREATE_INIT = 0x2300000, /* create the init process */ 117 SI_SUB_MBUF = 0x2380000, /* mbuf subsystem */ 118 SI_SUB_LEAVE_CRIT = 0x23c0000, /* allow interrupt operation */ 119 SI_SUB_DRIVERS = 0x2400000, /* Let Drivers initialize */ 120 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */ 121 SI_SUB_VFS = 0x4000000, /* virtual file system*/ 122 SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/ 123 SI_SUB_FINISH_SMP = 0x5000000, /* finish setting up cpus */ 124 SI_SUB_HELPER_THREADS = 0x5400000, /* misc helper threads */ 125 SI_SUB_CLIST = 0x5800000, /* clists*/ 126 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/ 127 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/ 128 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/ 129 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */ 130 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/ 131 SI_SUB_EXEC = 0x7400000, /* execve() handlers */ 132 SI_SUB_PROTO_BEGIN = 0x8000000, /* network protocol pre-init */ 133 SI_SUB_PROTO_IF = 0x8400000, /* interfaces */ 134 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/ 135 SI_SUB_PROTO_IFATTACHDOMAIN 136 = 0x8800001, /* domain dependent data init */ 137 SI_SUB_PROTO_END = 0x8ffffff, /* network protocol post-init */ 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_RAID = 0xb300000, /* Configure vinum */ 144 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/ 145 SI_SUB_SWAP = 0xc000000, /* swap*/ 146 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/ 147 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/ 148 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/ 149 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/ 150 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/ 151 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/ 152 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/ 153 SI_SUB_SMP = 0xf000000, /* idle procs*/ 154 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/ 155 }; 156 157 158 /* 159 * Some enumerated orders; "ANY" sorts last. 160 */ 161 enum sysinit_elem_order { 162 SI_ORDER_FIRST = 0x0000000, /* first*/ 163 SI_ORDER_SECOND = 0x0000001, /* second*/ 164 SI_ORDER_THIRD = 0x0000002, /* third*/ 165 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */ 166 SI_ORDER_ANY = 0xfffffff /* last*/ 167 }; 168 169 170 /* 171 * A system initialization call instance 172 * 173 * At the moment there is one instance of sysinit. We probably do not 174 * want two which is why this code is if'd out, but we definitely want 175 * to discern SYSINIT's which take non-constant data pointers and 176 * SYSINIT's which take constant data pointers, 177 * 178 * The C_* macros take functions expecting const void * arguments 179 * while the non-C_* macros take functions expecting just void * arguments. 180 * 181 * With -Wcast-qual on, the compiler issues warnings: 182 * - if we pass non-const data or functions taking non-const data 183 * to a C_* macro. 184 * 185 * - if we pass const data to the normal macros 186 * 187 * However, no warning is issued if we pass a function taking const data 188 * through a normal non-const macro. This is ok because the function is 189 * saying it won't modify the data so we don't care whether the data is 190 * modifiable or not. 191 */ 192 193 typedef void (*sysinit_nfunc_t) (void *); 194 typedef void (*sysinit_cfunc_t) (const void *); 195 196 struct sysinit { 197 unsigned int subsystem; /* subsystem identifier*/ 198 unsigned int order; /* init order within subsystem*/ 199 sysinit_cfunc_t func; /* function */ 200 const void *udata; /* multiplexer/argument */ 201 }; 202 203 /* 204 * Default: no special processing 205 * 206 * The C_ version of SYSINIT is for data pointers to const 207 * data ( and functions taking data pointers to const data ). 208 * At the moment it is no different from SYSINIT and thus 209 * still results in warnings. 210 * 211 * The casts are necessary to have the compiler produce the 212 * correct warnings when -Wcast-qual is used. 213 * 214 */ 215 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ 216 static struct sysinit uniquifier ## _sys_init = { \ 217 subsystem, \ 218 order, \ 219 func, \ 220 ident \ 221 }; \ 222 DATA_SET(sysinit_set,uniquifier ## _sys_init); 223 224 #define SYSINIT(uniquifier, subsystem, order, func, ident) \ 225 C_SYSINIT(uniquifier, subsystem, order, \ 226 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 227 228 /* 229 * Called on module unload: no special processing 230 */ 231 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 232 static struct sysinit uniquifier ## _sys_uninit = { \ 233 subsystem, \ 234 order, \ 235 func, \ 236 ident \ 237 }; \ 238 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit) 239 240 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 241 C_SYSUNINIT(uniquifier, subsystem, order, \ 242 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 243 244 void sysinit_add (struct sysinit **, struct sysinit **); 245 246 /* 247 * Infrastructure for tunable 'constants'. Value may be specified at compile 248 * time or kernel load time. Rules relating tunables together can be placed 249 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST. 250 */ 251 252 extern void tunable_int_init(void *); 253 struct tunable_int { 254 const char *path; 255 int *var; 256 }; 257 #define TUNABLE_INT(path, var) \ 258 _TUNABLE_INT((path), (var), __LINE__) 259 #define _TUNABLE_INT(path, var, line) \ 260 __TUNABLE_INT((path), (var), line) 261 262 #define __TUNABLE_INT(path, var, line) \ 263 static struct tunable_int __tunable_int_ ## line = { \ 264 path, \ 265 var, \ 266 }; \ 267 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 268 tunable_int_init, &__tunable_int_ ## line) 269 270 #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var)) 271 272 /* Backwards compatibility with the old deprecated TUNABLE_INT_DECL API */ 273 #define TUNABLE_INT_DECL(path, defval, var) \ 274 static void __Tunable_ ## var (void *ignored) \ 275 { \ 276 (var) = (defval); \ 277 TUNABLE_INT_FETCH((path), &(var)); \ 278 } \ 279 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL); 280 281 extern void tunable_quad_init(void *); 282 struct tunable_quad { 283 const char *path; 284 quad_t *var; 285 }; 286 #define TUNABLE_QUAD(path, var) \ 287 _TUNABLE_QUAD((path), (var), __LINE__) 288 #define _TUNABLE_QUAD(path, var, line) \ 289 __TUNABLE_QUAD((path), (var), line) 290 291 #define __TUNABLE_QUAD(path, var, line) \ 292 static struct tunable_quad __tunable_quad_ ## line = { \ 293 path, \ 294 var, \ 295 }; \ 296 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 297 tunable_quad_init, &__tunable_quad_ ## line) 298 299 #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var)) 300 301 extern void tunable_str_init(void *); 302 struct tunable_str { 303 const char *path; 304 char *var; 305 int size; 306 }; 307 #define TUNABLE_STR(path, var, size) \ 308 _TUNABLE_STR((path), (var), (size), __LINE__) 309 #define _TUNABLE_STR(path, var, size, line) \ 310 __TUNABLE_STR((path), (var), (size), line) 311 312 #define __TUNABLE_STR(path, var, size, line) \ 313 static struct tunable_str __tunable_str_ ## line = { \ 314 path, \ 315 var, \ 316 size, \ 317 }; \ 318 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 319 tunable_str_init, &__tunable_str_ ## line) 320 321 #define TUNABLE_STR_FETCH(path, var, size) \ 322 getenv_string((path), (var), (size)) 323 324 /* 325 * Compatibility. To be deprecated after LKM is removed. 326 */ 327 #include <sys/module.h> 328 #define PSEUDO_SET(sym, name) \ 329 static int name ## _modevent(module_t mod, int type, void *data) \ 330 { \ 331 void (*initfunc)(void *) = (void (*)(void *))data; \ 332 switch (type) { \ 333 case MOD_LOAD: \ 334 /* printf(#name " module load\n"); */ \ 335 initfunc(NULL); \ 336 break; \ 337 case MOD_UNLOAD: \ 338 printf(#name " module unload - not possible for this module type\n"); \ 339 return EINVAL; \ 340 } \ 341 return 0; \ 342 } \ 343 static moduledata_t name ## _mod = { \ 344 #name, \ 345 name ## _modevent, \ 346 (void *)sym \ 347 }; \ 348 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY) 349 350 extern struct linker_set execsw_set; 351 352 353 354 355 struct intr_config_hook { 356 TAILQ_ENTRY(intr_config_hook) ich_links; 357 void (*ich_func) (void *); 358 void *ich_arg; 359 const char *ich_desc; 360 }; 361 362 int config_intrhook_establish (struct intr_config_hook *); 363 void config_intrhook_disestablish (struct intr_config_hook *); 364 365 #endif /* !_SYS_KERNEL_H_*/ 366