1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 1995 Terrence R. Lambert 5 * All rights reserved. 6 * 7 * Copyright (c) 1990, 1993 8 * The Regents of the University of California. All rights reserved. 9 * (c) UNIX System Laboratories, Inc. 10 * All or some portions of this file are derived from material licensed 11 * to the University of California by American Telephone and Telegraph 12 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 13 * the permission of UNIX System Laboratories, Inc. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #ifndef _SYS_KERNEL_H_ 45 #define _SYS_KERNEL_H_ 46 47 #include <sys/linker_set.h> 48 49 #ifdef _KERNEL 50 51 /* for intrhook and sysinit linked list below */ 52 #include <sys/queue.h> 53 54 /* for timestamping SYSINITs; other files may assume this is included here */ 55 #include <sys/tslog.h> 56 57 /* Global variables for the kernel. */ 58 59 /* 1.1 */ 60 extern char kernelname[MAXPATHLEN]; 61 62 extern int tick; /* usec per tick (1000000 / hz) */ 63 extern int hz; /* system clock's frequency */ 64 extern int psratio; /* ratio: prof / stat */ 65 extern int stathz; /* statistics clock's frequency */ 66 extern int profhz; /* profiling clock's frequency */ 67 extern int profprocs; /* number of process's profiling */ 68 69 /* 70 * The ticks and ticksl symbols overlap, giving a 64-bit tick counter on 64-bit 71 * platforms while still maintaining compatibility with the legacy 32-bit 72 * counter. Either value can be used, but rollover must be handled; at 1000Hz, 73 * ticks (and ticksl on 32-bit platforms) roll over roughly every 25 days. On 74 * 64-bit platforms, ticksl will not roll over in the foreseeable future. 75 */ 76 extern volatile int ticks; 77 extern volatile long ticksl; 78 79 #endif /* _KERNEL */ 80 81 /* 82 * Enumerated types for known system startup interfaces. 83 * 84 * Startup occurs in ascending numeric order; the list entries are 85 * sorted prior to attempting startup to guarantee order. Items 86 * of the same level are arbitrated for order based on the 'order' 87 * element. 88 * 89 * These numbers are arbitrary and are chosen ONLY for ordering; the 90 * enumeration values are explicit rather than implicit to provide 91 * for binary compatibility with inserted elements. 92 * 93 * The SI_SUB_LAST value must have the highest lexical value. 94 */ 95 enum sysinit_sub_id { 96 SI_SUB_DUMMY = 0x0000000, /* not executed; for linker */ 97 SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */ 98 SI_SUB_COPYRIGHT = 0x0800001, /* first use of console */ 99 SI_SUB_VM = 0x1000000, /* virtual memory system init */ 100 SI_SUB_COUNTER = 0x1100000, /* counter(9) is initialized */ 101 SI_SUB_KMEM = 0x1800000, /* kernel memory */ 102 SI_SUB_HYPERVISOR = 0x1A40000, /* 103 * Hypervisor detection and 104 * virtualization support 105 * setup. 106 */ 107 SI_SUB_WITNESS = 0x1A80000, /* witness initialization */ 108 SI_SUB_MTX_POOL_DYNAMIC = 0x1AC0000, /* dynamic mutex pool */ 109 SI_SUB_LOCK = 0x1B00000, /* various locks */ 110 SI_SUB_EVENTHANDLER = 0x1C00000, /* eventhandler init */ 111 SI_SUB_VNET_PRELINK = 0x1E00000, /* vnet init before modules */ 112 SI_SUB_KLD = 0x2000000, /* KLD and module setup */ 113 SI_SUB_KHELP = 0x2080000, /* khelp modules */ 114 SI_SUB_CPU = 0x2100000, /* CPU resource(s) */ 115 SI_SUB_RACCT = 0x2110000, /* resource accounting */ 116 SI_SUB_KDTRACE = 0x2140000, /* Kernel dtrace hooks */ 117 SI_SUB_RANDOM = 0x2160000, /* random number generator */ 118 SI_SUB_MAC = 0x2180000, /* TrustedBSD MAC subsystem */ 119 SI_SUB_MAC_POLICY = 0x21C0000, /* TrustedBSD MAC policies */ 120 SI_SUB_MAC_LATE = 0x21D0000, /* TrustedBSD MAC subsystem */ 121 SI_SUB_VNET = 0x21E0000, /* vnet 0 */ 122 SI_SUB_INTRINSIC = 0x2200000, /* proc 0 */ 123 SI_SUB_VM_CONF = 0x2300000, /* config VM, set limits */ 124 SI_SUB_DDB_SERVICES = 0x2380000, /* capture, scripting, etc. */ 125 SI_SUB_RUN_QUEUE = 0x2400000, /* set up run queue */ 126 SI_SUB_KTRACE = 0x2480000, /* ktrace */ 127 SI_SUB_OPENSOLARIS = 0x2490000, /* OpenSolaris compatibility */ 128 SI_SUB_AUDIT = 0x24C0000, /* audit */ 129 SI_SUB_CREATE_INIT = 0x2500000, /* create init process */ 130 SI_SUB_SCHED_IDLE = 0x2600000, /* required idle procs */ 131 SI_SUB_MBUF = 0x2700000, /* mbuf subsystem */ 132 SI_SUB_INTR = 0x2800000, /* interrupt threads */ 133 SI_SUB_TASKQ = 0x2880000, /* task queues */ 134 SI_SUB_EPOCH = 0x2888000, /* epoch subsystem */ 135 #ifdef EARLY_AP_STARTUP 136 SI_SUB_SMP = 0x2900000, /* start the APs */ 137 #endif 138 SI_SUB_SOFTINTR = 0x2A00000, /* start soft interrupt thread */ 139 SI_SUB_DEVFS = 0x2F00000, /* devfs ready for devices */ 140 SI_SUB_INIT_IF = 0x3000000, /* prep for net interfaces */ 141 SI_SUB_NETGRAPH = 0x3010000, /* Let Netgraph initialize */ 142 SI_SUB_DTRACE = 0x3020000, /* DTrace subsystem */ 143 SI_SUB_DTRACE_PROVIDER = 0x3048000, /* DTrace providers */ 144 SI_SUB_DTRACE_ANON = 0x308C000, /* DTrace anon enabling */ 145 SI_SUB_DRIVERS = 0x3100000, /* Let Drivers initialize */ 146 SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */ 147 SI_SUB_VFS = 0x4000000, /* virtual filesystem */ 148 SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks */ 149 SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory */ 150 SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores */ 151 SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues */ 152 SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */ 153 SI_SUB_PSEUDO = 0x7000000, /* pseudo devices */ 154 SI_SUB_EXEC = 0x7400000, /* execve() handlers */ 155 SI_SUB_PROTO_BEGIN = 0x8000000, /* VNET initialization */ 156 SI_SUB_PROTO_PFIL = 0x8100000, /* Initialize pfil before FWs */ 157 SI_SUB_PROTO_IF = 0x8400000, /* interfaces */ 158 SI_SUB_PROTO_DOMAININIT = 0x8600000, /* domain registration system */ 159 SI_SUB_PROTO_MC = 0x8700000, /* Multicast */ 160 SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?) */ 161 SI_SUB_PROTO_FIREWALL = 0x8806000, /* Firewalls */ 162 SI_SUB_PROTO_IFATTACHDOMAIN = 0x8808000,/* domain dependent data init */ 163 SI_SUB_PROTO_END = 0x8ffffff, /* VNET helper functions */ 164 SI_SUB_KPROF = 0x9000000, /* kernel profiling */ 165 SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events */ 166 SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */ 167 SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */ 168 SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup */ 169 SI_SUB_SYSCALLS = 0xd800000, /* register system calls */ 170 SI_SUB_VNET_DONE = 0xdc00000, /* vnet registration complete */ 171 SI_SUB_KTHREAD_INIT = 0xe000000, /* init process */ 172 SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon */ 173 SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon */ 174 SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon */ 175 SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon */ 176 SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs */ 177 #ifndef EARLY_AP_STARTUP 178 SI_SUB_SMP = 0xf000000, /* start the APs */ 179 #endif 180 SI_SUB_RACCTD = 0xf100000, /* start racctd */ 181 SI_SUB_LAST = 0xfffffff /* final initialization */ 182 }; 183 184 /* 185 * Some enumerated orders; "ANY" sorts last. 186 */ 187 enum sysinit_elem_order { 188 SI_ORDER_FIRST = 0x0000000, /* first */ 189 SI_ORDER_SECOND = 0x0000001, /* second */ 190 SI_ORDER_THIRD = 0x0000002, /* third */ 191 SI_ORDER_FOURTH = 0x0000003, /* fourth */ 192 SI_ORDER_FIFTH = 0x0000004, /* fifth */ 193 SI_ORDER_SIXTH = 0x0000005, /* sixth */ 194 SI_ORDER_SEVENTH = 0x0000006, /* seventh */ 195 SI_ORDER_EIGHTH = 0x0000007, /* eighth */ 196 SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */ 197 SI_ORDER_ANY = 0xfffffff /* last */ 198 }; 199 200 /* 201 * A system initialization call instance 202 * 203 * At the moment there is one instance of sysinit. We probably do not 204 * want two which is why this code is if'd out, but we definitely want 205 * to discern SYSINIT's which take non-constant data pointers and 206 * SYSINIT's which take constant data pointers, 207 * 208 * The C_* macros take functions expecting const void * arguments 209 * while the non-C_* macros take functions expecting just void * arguments. 210 * 211 * With -Wcast-qual on, the compiler issues warnings: 212 * - if we pass non-const data or functions taking non-const data 213 * to a C_* macro. 214 * 215 * - if we pass const data to the normal macros 216 * 217 * However, no warning is issued if we pass a function taking const data 218 * through a normal non-const macro. This is ok because the function is 219 * saying it won't modify the data so we don't care whether the data is 220 * modifiable or not. 221 */ 222 223 typedef void (*sysinit_nfunc_t)(void *); 224 typedef void (*sysinit_cfunc_t)(const void *); 225 226 struct sysinit { 227 enum sysinit_sub_id subsystem; /* subsystem identifier */ 228 enum sysinit_elem_order order; /* init order within subsystem */ 229 STAILQ_ENTRY(sysinit) next; /* singly-linked list */ 230 sysinit_cfunc_t func; /* function */ 231 const void *udata; /* multiplexer/argument */ 232 }; 233 234 /* 235 * Default: no special processing 236 * 237 * The C_ version of SYSINIT is for data pointers to const 238 * data ( and functions taking data pointers to const data ). 239 * At the moment it is no different from SYSINIT and thus 240 * still results in warnings. 241 * 242 * The casts are necessary to have the compiler produce the 243 * correct warnings when -Wcast-qual is used. 244 * 245 */ 246 #ifdef TSLOG 247 struct sysinit_tslog { 248 sysinit_cfunc_t func; 249 const void *data; 250 const char *name; 251 }; 252 static inline void 253 sysinit_tslog_shim(const void *data) 254 { 255 const struct sysinit_tslog *x = data; 256 257 TSRAW(curthread, TS_ENTER, "SYSINIT", x->name); 258 (x->func)(x->data); 259 TSRAW(curthread, TS_EXIT, "SYSINIT", x->name); 260 } 261 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ 262 static struct sysinit_tslog uniquifier ## _sys_init_tslog = { \ 263 func, \ 264 (ident), \ 265 #uniquifier \ 266 }; \ 267 static struct sysinit uniquifier ## _sys_init = { \ 268 subsystem, \ 269 order, \ 270 { NULL }, \ 271 sysinit_tslog_shim, \ 272 &uniquifier ## _sys_init_tslog \ 273 }; \ 274 DATA_WSET(sysinit_set, uniquifier ## _sys_init) 275 #else 276 #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ 277 static struct sysinit uniquifier ## _sys_init = { \ 278 subsystem, \ 279 order, \ 280 { NULL }, \ 281 func, \ 282 (ident) \ 283 }; \ 284 DATA_WSET(sysinit_set, uniquifier ## _sys_init) 285 #endif 286 287 #define SYSINIT(uniquifier, subsystem, order, func, ident) \ 288 C_SYSINIT(uniquifier, subsystem, order, \ 289 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident)) 290 291 /* 292 * Called on module unload: no special processing 293 */ 294 #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 295 static struct sysinit uniquifier ## _sys_uninit = { \ 296 subsystem, \ 297 order, \ 298 { NULL }, \ 299 func, \ 300 (ident) \ 301 }; \ 302 DATA_WSET(sysuninit_set, uniquifier ## _sys_uninit) 303 304 #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \ 305 C_SYSUNINIT(uniquifier, subsystem, order, \ 306 (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident)) 307 308 void sysinit_add(struct sysinit **set, struct sysinit **set_end); 309 310 #ifdef _KERNEL 311 312 /* 313 * Infrastructure for tunable 'constants'. Value may be specified at compile 314 * time or kernel load time. Rules relating tunables together can be placed 315 * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_ANY. 316 * 317 * WARNING: developers should never use the reserved suffixes specified in 318 * loader.conf(5) for any tunables or conflicts will result. 319 */ 320 321 /* 322 * int 323 * please avoid using for new tunables! 324 */ 325 extern void tunable_int_init(void *); 326 struct tunable_int { 327 const char *path; 328 int *var; 329 }; 330 #define TUNABLE_INT(path, var) \ 331 static struct tunable_int __CONCAT(__tunable_int_, __LINE__) = { \ 332 (path), \ 333 (var), \ 334 }; \ 335 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 336 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_int_init, \ 337 &__CONCAT(__tunable_int_, __LINE__)) 338 339 #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var)) 340 341 /* 342 * long 343 */ 344 extern void tunable_long_init(void *); 345 struct tunable_long { 346 const char *path; 347 long *var; 348 }; 349 #define TUNABLE_LONG(path, var) \ 350 static struct tunable_long __CONCAT(__tunable_long_, __LINE__) = { \ 351 (path), \ 352 (var), \ 353 }; \ 354 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 355 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_long_init,\ 356 &__CONCAT(__tunable_long_, __LINE__)) 357 358 #define TUNABLE_LONG_FETCH(path, var) getenv_long((path), (var)) 359 360 /* 361 * unsigned long 362 */ 363 extern void tunable_ulong_init(void *); 364 struct tunable_ulong { 365 const char *path; 366 unsigned long *var; 367 }; 368 #define TUNABLE_ULONG(path, var) \ 369 static struct tunable_ulong __CONCAT(__tunable_ulong_, __LINE__) = { \ 370 (path), \ 371 (var), \ 372 }; \ 373 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 374 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_ulong_init, \ 375 &__CONCAT(__tunable_ulong_, __LINE__)) 376 377 #define TUNABLE_ULONG_FETCH(path, var) getenv_ulong((path), (var)) 378 379 /* 380 * int64_t 381 */ 382 extern void tunable_int64_init(void *); 383 struct tunable_int64 { 384 const char *path; 385 int64_t *var; 386 }; 387 #define TUNABLE_INT64(path, var) \ 388 static struct tunable_int64 __CONCAT(__tunable_int64_, __LINE__) = { \ 389 (path), \ 390 (var), \ 391 }; \ 392 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 393 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_int64_init, \ 394 &__CONCAT(__tunable_int64_, __LINE__)) 395 396 #define TUNABLE_INT64_FETCH(path, var) getenv_int64((path), (var)) 397 398 /* 399 * uint64_t 400 */ 401 extern void tunable_uint64_init(void *); 402 struct tunable_uint64 { 403 const char *path; 404 uint64_t *var; 405 }; 406 #define TUNABLE_UINT64(path, var) \ 407 static struct tunable_uint64 __CONCAT(__tunable_uint64_, __LINE__) = { \ 408 (path), \ 409 (var), \ 410 }; \ 411 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 412 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_uint64_init, \ 413 &__CONCAT(__tunable_uint64_, __LINE__)) 414 415 #define TUNABLE_UINT64_FETCH(path, var) getenv_uint64((path), (var)) 416 417 /* 418 * quad 419 */ 420 extern void tunable_quad_init(void *); 421 struct tunable_quad { 422 const char *path; 423 quad_t *var; 424 }; 425 #define TUNABLE_QUAD(path, var) \ 426 static struct tunable_quad __CONCAT(__tunable_quad_, __LINE__) = { \ 427 (path), \ 428 (var), \ 429 }; \ 430 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 431 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_quad_init, \ 432 &__CONCAT(__tunable_quad_, __LINE__)) 433 434 #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var)) 435 436 /* 437 * bool 438 */ 439 extern void tunable_bool_init(void *); 440 struct tunable_bool { 441 const char *path; 442 bool *var; 443 }; 444 #define TUNABLE_BOOL(path, var) \ 445 static struct tunable_bool __CONCAT(__tunable_bool_, __LINE__) = { \ 446 (path), \ 447 (var), \ 448 }; \ 449 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 450 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_bool_init, \ 451 &__CONCAT(__tunable_bool_, __LINE__)) 452 453 #define TUNABLE_BOOL_FETCH(path, var) getenv_bool((path), (var)) 454 455 extern void tunable_str_init(void *); 456 struct tunable_str { 457 const char *path; 458 char *var; 459 int size; 460 }; 461 #define TUNABLE_STR(path, var, size) \ 462 static struct tunable_str __CONCAT(__tunable_str_, __LINE__) = { \ 463 (path), \ 464 (var), \ 465 (size), \ 466 }; \ 467 SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ 468 SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_str_init, \ 469 &__CONCAT(__tunable_str_, __LINE__)) 470 471 #define TUNABLE_STR_FETCH(path, var, size) \ 472 getenv_string((path), (var), (size)) 473 474 #endif /* _KERNEL */ 475 476 typedef void (*ich_func_t)(void *_arg); 477 478 struct intr_config_hook { 479 STAILQ_ENTRY(intr_config_hook) ich_links; 480 uintptr_t ich_state; 481 #define ICHS_QUEUED 0x1 482 #define ICHS_RUNNING 0x2 483 #define ICHS_DONE 0x3 484 ich_func_t ich_func; 485 void *ich_arg; 486 }; 487 488 int config_intrhook_establish(struct intr_config_hook *hook); 489 void config_intrhook_disestablish(struct intr_config_hook *hook); 490 int config_intrhook_drain(struct intr_config_hook *hook); 491 void config_intrhook_oneshot(ich_func_t _func, void *_arg); 492 493 #endif /* !_SYS_KERNEL_H_*/ 494