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 1.6 2003/11/10 06:12:17 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 timeval 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 tickdelta; 80 extern long timedelta; 81 82 #endif /* _KERNEL */ 83 84 /* 85 * Enumerated types for known system startup interfaces. 86 * 87 * Startup occurs in ascending numeric order; the list entries are 88 * sorted prior to attempting startup to guarantee order. Items 89 * of the same level are arbitrated for order based on the 'order' 90 * element. 91 * 92 * These numbers are arbitrary and are chosen ONLY for ordering; the 93 * enumeration values are explicit rather than implicit to provide 94 * for binary compatibility with inserted elements. 95 * 96 * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value. 97 * 98 * The SI_SUB_CONSOLE and SI_SUB_SWAP values represent values used by 99 * the BSD 4.4Lite but not by FreeBSD; they are maintained in dependent 100 * order to support porting. 101 * 102 * The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of 103 * initializations to take place at splimp(). This is a historical 104 * wart that should be removed -- probably running everything at 105 * splimp() until the first init that doesn't want it is the correct 106 * fix. They are currently present to ensure historical behavior. 107 */ 108 enum sysinit_sub_id { 109 SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/ 110 SI_SUB_DONE = 0x0000001, /* processed*/ 111 SI_SUB_CONSOLE = 0x0800000, /* console*/ 112 SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/ 113 SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */ 114 SI_SUB_VM = 0x1000000, /* virtual memory system init*/ 115 SI_SUB_KMEM = 0x1800000, /* kernel memory*/ 116 SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/ 117 SI_SUB_CPU = 0x1e00000, /* CPU resource(s)*/ 118 SI_SUB_KLD = 0x1f00000, /* KLD and module setup */ 119 SI_SUB_INTRINSIC = 0x2000000, /* proc 0*/ 120 SI_SUB_VM_CONF = 0x2100000, /* config VM, set limits*/ 121 SI_SUB_RUN_QUEUE = 0x2200000, /* the run queue*/ 122 SI_SUB_CREATE_INIT = 0x2300000, /* create the init process */ 123 SI_SUB_MBUF = 0x2380000, /* mbuf subsystem */ 124 SI_SUB_LEAVE_CRIT = 0x23c0000, /* allow interrupt operation */ 125 SI_SUB_DRIVERS = 0x2400000, /* Let Drivers initialize */ 126 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */ 127 SI_SUB_VFS = 0x4000000, /* virtual file system*/ 128 SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/ 129 SI_SUB_CLIST = 0x5800000, /* clists*/ 130 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/ 131 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/ 132 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/ 133 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */ 134 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/ 135 SI_SUB_EXEC = 0x7400000, /* execve() handlers */ 136 SI_SUB_PROTO_BEGIN = 0x8000000, /* XXX: set splimp (kludge)*/ 137 SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/ 138 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/ 139 SI_SUB_PROTO_END = 0x8ffffff, /* XXX: set splx (kludge)*/ 140 SI_SUB_KPROF = 0x9000000, /* kernel profiling*/ 141 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/ 142 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */ 143 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */ 144 SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */ 145 SI_SUB_RAID = 0xb300000, /* Configure vinum */ 146 SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/ 147 SI_SUB_SWAP = 0xc000000, /* swap*/ 148 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/ 149 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/ 150 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/ 151 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/ 152 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/ 153 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/ 154 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/ 155 SI_SUB_SMP = 0xf000000, /* idle procs*/ 156 SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/ 157 }; 158 159 160 /* 161 * Some enumerated orders; "ANY" sorts last. 162 */ 163 enum sysinit_elem_order { 164 SI_ORDER_FIRST = 0x0000000, /* first*/ 165 SI_ORDER_SECOND = 0x0000001, /* second*/ 166 SI_ORDER_THIRD = 0x0000002, /* third*/ 167 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */ 168 SI_ORDER_ANY = 0xfffffff /* last*/ 169 }; 170 171 172 /* 173 * A system initialization call instance 174 * 175 * At the moment there is one instance of sysinit. We probably do not 176 * want two which is why this code is if'd out, but we definitely want 177 * to discern SYSINIT's which take non-constant data pointers and 178 * SYSINIT's which take constant data pointers, 179 * 180 * The C_* macros take functions expecting const void * arguments 181 * while the non-C_* macros take functions expecting just void * arguments. 182 * 183 * With -Wcast-qual on, the compiler issues warnings: 184 * - if we pass non-const data or functions taking non-const data 185 * to a C_* macro. 186 * 187 * - if we pass const data to the normal macros 188 * 189 * However, no warning is issued if we pass a function taking const data 190 * through a normal non-const macro. This is ok because the function is 191 * saying it won't modify the data so we don't care whether the data is 192 * modifiable or not. 193 */ 194 195 typedef void (*sysinit_nfunc_t) (void *); 196 typedef void (*sysinit_cfunc_t) (const void *); 197 198 struct sysinit { 199 unsigned int subsystem; /* subsystem identifier*/ 200 unsigned int order; /* init order within subsystem*/ 201 sysinit_cfunc_t func; /* function */ 202 const void *udata; /* multiplexer/argument */ 203 }; 204 205 /* 206 * Default: no special processing 207 * 208 * The C_ version of SYSINIT is for data pointers to const 209 * data ( and functions taking data pointers to const data ). 210 * At the moment it is no different from SYSINIT and thus 211 * still results in warnings. 212 * 213 * The casts are necessary to have the compiler produce the 214 * correct warnings when -Wcast-qual is used. 215 * 216 */ 217 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ 218 static struct sysinit uniquifier ## _sys_init = { \ 219 subsystem, \ 220 order, \ 221 func, \ 222 ident \ 223 }; \ 224 DATA_SET(sysinit_set,uniquifier ## _sys_init); 225 226 #define SYSINIT(uniquifier, subsystem, order, func, ident) \ 227 C_SYSINIT(uniquifier, subsystem, order, \ 228 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 229 230 /* 231 * Called on module unload: no special processing 232 */ 233 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 234 static struct sysinit uniquifier ## _sys_uninit = { \ 235 subsystem, \ 236 order, \ 237 func, \ 238 ident \ 239 }; \ 240 DATA_SET(sysuninit_set,uniquifier ## _sys_uninit) 241 242 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 243 C_SYSUNINIT(uniquifier, subsystem, order, \ 244 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident) 245 246 void sysinit_add (struct sysinit **set, struct sysinit **set_end); 247 248 /* 249 * Infrastructure for tunable 'constants'. Value may be specified at compile 250 * time or kernel load time. Rules relating tunables together can be placed 251 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST. 252 */ 253 254 extern void tunable_int_init(void *); 255 struct tunable_int { 256 const char *path; 257 int *var; 258 }; 259 #define TUNABLE_INT(path, var) \ 260 _TUNABLE_INT((path), (var), __LINE__) 261 #define _TUNABLE_INT(path, var, line) \ 262 __TUNABLE_INT((path), (var), line) 263 264 #define __TUNABLE_INT(path, var, line) \ 265 static struct tunable_int __tunable_int_ ## line = { \ 266 path, \ 267 var, \ 268 }; \ 269 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 270 tunable_int_init, &__tunable_int_ ## line) 271 272 #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var)) 273 274 /* Backwards compatability with the old deprecated TUNABLE_INT_DECL API */ 275 #define TUNABLE_INT_DECL(path, defval, var) \ 276 static void __Tunable_ ## var (void *ignored) \ 277 { \ 278 (var) = (defval); \ 279 TUNABLE_INT_FETCH((path), &(var)); \ 280 } \ 281 SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL); 282 283 extern void tunable_quad_init(void *); 284 struct tunable_quad { 285 const char *path; 286 quad_t *var; 287 }; 288 #define TUNABLE_QUAD(path, var) \ 289 _TUNABLE_QUAD((path), (var), __LINE__) 290 #define _TUNABLE_QUAD(path, var, line) \ 291 __TUNABLE_QUAD((path), (var), line) 292 293 #define __TUNABLE_QUAD(path, var, line) \ 294 static struct tunable_quad __tunable_quad_ ## line = { \ 295 path, \ 296 var, \ 297 }; \ 298 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 299 tunable_quad_init, &__tunable_quad_ ## line) 300 301 #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var)) 302 303 extern void tunable_str_init(void *); 304 struct tunable_str { 305 const char *path; 306 char *var; 307 int size; 308 }; 309 #define TUNABLE_STR(path, var, size) \ 310 _TUNABLE_STR((path), (var), (size), __LINE__) 311 #define _TUNABLE_STR(path, var, size, line) \ 312 __TUNABLE_STR((path), (var), (size), line) 313 314 #define __TUNABLE_STR(path, var, size, line) \ 315 static struct tunable_str __tunable_str_ ## line = { \ 316 path, \ 317 var, \ 318 size, \ 319 }; \ 320 SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \ 321 tunable_str_init, &__tunable_str_ ## line) 322 323 #define TUNABLE_STR_FETCH(path, var, size) \ 324 getenv_string((path), (var), (size)) 325 326 /* 327 * Compatibility. To be deprecated after LKM is removed. 328 */ 329 #include <sys/module.h> 330 #define PSEUDO_SET(sym, name) \ 331 static int name ## _modevent(module_t mod, int type, void *data) \ 332 { \ 333 void (*initfunc)(void *) = (void (*)(void *))data; \ 334 switch (type) { \ 335 case MOD_LOAD: \ 336 /* printf(#name " module load\n"); */ \ 337 initfunc(NULL); \ 338 break; \ 339 case MOD_UNLOAD: \ 340 printf(#name " module unload - not possible for this module type\n"); \ 341 return EINVAL; \ 342 } \ 343 return 0; \ 344 } \ 345 static moduledata_t name ## _mod = { \ 346 #name, \ 347 name ## _modevent, \ 348 (void *)sym \ 349 }; \ 350 DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY) 351 352 extern struct linker_set execsw_set; 353 354 355 356 357 struct intr_config_hook { 358 TAILQ_ENTRY(intr_config_hook) ich_links; 359 void (*ich_func) (void *arg); 360 void *ich_arg; 361 }; 362 363 int config_intrhook_establish (struct intr_config_hook *hook); 364 void config_intrhook_disestablish (struct intr_config_hook *hook); 365 366 #endif /* !_SYS_KERNEL_H_*/ 367