Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/sys/systm.h
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1 /* $NetBSD: systm.h,v 1.301 2021/06/16 11:55:10 rin Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1988, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)systm.h 8.7 (Berkeley) 3/29/95 37 */ 38 39 #ifndef _SYS_SYSTM_H_ 40 #define _SYS_SYSTM_H_ 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_ddb.h" 44 #include "opt_multiprocessor.h" 45 #include "opt_gprof.h" 46 #include "opt_kasan.h" 47 #include "opt_kcsan.h" 48 #include "opt_kmsan.h" 49 #include "opt_modular.h" 50 #include "opt_wsdisplay_compat.h" 51 #endif 52 #if !defined(_KERNEL) && !defined(_STANDALONE) 53 #include <stdbool.h> 54 #endif 55 56 #include <machine/endian.h> 57 58 #include <sys/types.h> 59 #include <sys/stdarg.h> 60 61 #include <sys/device_if.h> 62 63 struct clockframe; 64 struct lwp; 65 struct proc; 66 struct sysent; 67 struct timeval; 68 struct tty; 69 struct uio; 70 struct vnode; 71 struct vmspace; 72 73 extern const char *panicstr; /* panic message */ 74 extern int doing_shutdown; /* shutting down */ 75 76 extern const char copyright[]; /* system copyright */ 77 extern char machine[]; /* machine type */ 78 extern char machine_arch[]; /* machine architecture */ 79 extern const char osrelease[]; /* short system version */ 80 extern const char ostype[]; /* system type */ 81 extern const char kernel_ident[];/* kernel configuration ID */ 82 extern const char version[]; /* system version */ 83 extern const char buildinfo[]; /* information from build environment */ 84 85 extern int autonicetime; /* time (in seconds) before autoniceval */ 86 extern int autoniceval; /* proc priority after autonicetime */ 87 88 extern int selwait; /* select timeout address */ 89 90 extern int maxmem; /* max memory per process */ 91 extern psize_t physmem; /* physical memory */ 92 93 extern dev_t dumpdev; /* dump device */ 94 extern dev_t dumpcdev; /* dump device (character equivalent) */ 95 extern long dumplo; /* offset into dumpdev */ 96 extern int dumpsize; /* size of dump in pages */ 97 extern const char *dumpspec; /* how dump device was specified */ 98 99 extern dev_t rootdev; /* root device */ 100 extern struct vnode *rootvp; /* vnode equivalent to above */ 101 extern device_t root_device; /* device equivalent to above */ 102 extern const char *rootspec; /* how root device was specified */ 103 104 extern int ncpu; /* number of CPUs configured */ 105 extern int ncpuonline; /* number of CPUs online */ 106 #if defined(_KERNEL) 107 extern bool mp_online; /* secondary processors are started */ 108 #endif /* defined(_KERNEL) */ 109 110 extern const char hexdigits[]; /* "0123456789abcdef" in subr_prf.c */ 111 extern const char HEXDIGITS[]; /* "0123456789ABCDEF" in subr_prf.c */ 112 113 /* 114 * These represent the swap pseudo-device (`sw'). This device 115 * is used by the swap pager to indirect through the routines 116 * in sys/vm/vm_swap.c. 117 */ 118 extern const dev_t swapdev; /* swapping device */ 119 extern struct vnode *swapdev_vp;/* vnode equivalent to above */ 120 121 extern const dev_t zerodev; /* /dev/zero */ 122 123 #if defined(_KERNEL) 124 typedef int sy_call_t(struct lwp *, const void *, register_t *); 125 126 extern struct sysent { /* system call table */ 127 short sy_narg; /* number of args */ 128 short sy_argsize; /* total size of arguments */ 129 int sy_flags; /* flags. see below */ 130 sy_call_t *sy_call; /* implementing function */ 131 uint32_t sy_entry; /* DTrace entry ID for systrace. */ 132 uint32_t sy_return; /* DTrace return ID for systrace. */ 133 } sysent[]; 134 extern int nsysent; 135 extern const uint32_t sysent_nomodbits[]; 136 #endif 137 138 #if BYTE_ORDER == BIG_ENDIAN 139 #define SCARG(p,k) ((p)->k.be.datum) /* get arg from args pointer */ 140 #elif BYTE_ORDER == LITTLE_ENDIAN 141 #define SCARG(p,k) ((p)->k.le.datum) /* get arg from args pointer */ 142 #else 143 #error "what byte order is this machine?" 144 #endif 145 146 #define SYCALL_INDIRECT 0x0000002 /* indirect (ie syscall() or __syscall()) */ 147 #define SYCALL_NARGS64_MASK 0x000f000 /* count of 64bit args */ 148 #define SYCALL_RET_64 0x0010000 /* retval is a 64bit integer value */ 149 #define SYCALL_ARG0_64 0x0020000 150 #define SYCALL_ARG1_64 0x0040000 151 #define SYCALL_ARG2_64 0x0080000 152 #define SYCALL_ARG3_64 0x0100000 153 #define SYCALL_ARG4_64 0x0200000 154 #define SYCALL_ARG5_64 0x0400000 155 #define SYCALL_ARG6_64 0x0800000 156 #define SYCALL_ARG7_64 0x1000000 157 #define SYCALL_NOSYS 0x2000000 /* permanent nosys in sysent[] */ 158 #define SYCALL_ARG_PTR 0x4000000 /* at least one argument is a pointer */ 159 #define SYCALL_RET_64_P(sy) ((sy)->sy_flags & SYCALL_RET_64) 160 #define SYCALL_ARG_64_P(sy, n) ((sy)->sy_flags & (SYCALL_ARG0_64 << (n))) 161 #define SYCALL_ARG_64_MASK(sy) (((sy)->sy_flags >> 17) & 0xff) 162 #define SYCALL_ARG_PTR_P(sy) ((sy)->sy_flags & SYCALL_ARG_PTR) 163 #define SYCALL_NARGS64(sy) (((sy)->sy_flags >> 12) & 0x0f) 164 #define SYCALL_NARGS64_VAL(n) ((n) << 12) 165 166 extern int boothowto; /* reboot flags, from console subsystem */ 167 #define bootverbose (boothowto & AB_VERBOSE) 168 #define bootquiet (boothowto & AB_QUIET) 169 170 extern const char *get_booted_kernel(void); 171 172 extern void (*v_putc)(int); /* Virtual console putc routine */ 173 174 /* 175 * General function declarations. 176 */ 177 void voidop(void); 178 int nullop(void *); 179 void* nullret(void); 180 int enodev(void); 181 int enosys(void); 182 int enoioctl(void); 183 int enxio(void); 184 int eopnotsupp(void); 185 186 enum hashtype { 187 HASH_LIST, 188 HASH_SLIST, 189 HASH_TAILQ, 190 HASH_PSLIST 191 }; 192 193 #ifdef _KERNEL 194 #define COND_SET_STRUCT(dst, src, allow) \ 195 do { \ 196 /* \ 197 * Make sure we don't end up hashing/assigning large \ 198 * structure for performance. Upper-bound is arbitrary, \ 199 * but consider before bumping. \ 200 */ \ 201 CTASSERT(sizeof(src) < 32); \ 202 if (allow) \ 203 dst = src; \ 204 else \ 205 hash_value(&dst, sizeof(dst), &src, sizeof(src)); \ 206 } while (/*CONSTCOND*/0) 207 208 #define COND_SET_CPTR(dst, src, allow) \ 209 do { \ 210 if (allow) \ 211 dst = src; \ 212 else { \ 213 void *__v; \ 214 hash_value(&__v, sizeof(__v), &src, sizeof(src)); \ 215 dst = __v; \ 216 } \ 217 } while (/*CONSTCOND*/0) 218 219 #define COND_SET_PTR(dst, src, allow) \ 220 do { \ 221 if (allow) \ 222 dst = src; \ 223 else \ 224 hash_value(&dst, sizeof(dst), &src, sizeof(src)); \ 225 } while (/*CONSTCOND*/0) 226 227 #define COND_SET_VALUE(dst, src, allow) \ 228 do { \ 229 if (allow) \ 230 dst = src; \ 231 else { \ 232 uint64_t __v = src; \ 233 hash_value(&dst, sizeof(dst), &__v, sizeof(__v)); \ 234 } \ 235 } while (/*CONSTCOND*/0) 236 237 void hash_value(void *, size_t, const void *, size_t); 238 bool get_expose_address(struct proc *); 239 void *hashinit(u_int, enum hashtype, bool, u_long *); 240 void hashdone(void *, enum hashtype, u_long); 241 int seltrue(dev_t, int, struct lwp *); 242 int sys_nosys(struct lwp *, const void *, register_t *); 243 int sys_nomodule(struct lwp *, const void *, register_t *); 244 245 void aprint_normal(const char *, ...) __printflike(1, 2); 246 void aprint_error(const char *, ...) __printflike(1, 2); 247 void aprint_naive(const char *, ...) __printflike(1, 2); 248 void aprint_verbose(const char *, ...) __printflike(1, 2); 249 void aprint_debug(const char *, ...) __printflike(1, 2); 250 251 void aprint_normal_dev(device_t, const char *, ...) __printflike(2, 3); 252 void aprint_error_dev(device_t, const char *, ...) __printflike(2, 3); 253 void aprint_naive_dev(device_t, const char *, ...) __printflike(2, 3); 254 void aprint_verbose_dev(device_t, const char *, ...) __printflike(2, 3); 255 void aprint_debug_dev(device_t, const char *, ...) __printflike(2, 3); 256 257 void device_printf(device_t, const char *fmt, ...) __printflike(2, 3); 258 259 struct ifnet; 260 261 void aprint_normal_ifnet(struct ifnet *, const char *, ...) 262 __printflike(2, 3); 263 void aprint_error_ifnet(struct ifnet *, const char *, ...) 264 __printflike(2, 3); 265 void aprint_naive_ifnet(struct ifnet *, const char *, ...) 266 __printflike(2, 3); 267 void aprint_verbose_ifnet(struct ifnet *, const char *, ...) 268 __printflike(2, 3); 269 void aprint_debug_ifnet(struct ifnet *, const char *, ...) 270 __printflike(2, 3); 271 272 int aprint_get_error_count(void); 273 274 void printf_tolog(const char *, ...) __printflike(1, 2); 275 276 void printf_nolog(const char *, ...) __printflike(1, 2); 277 278 void printf_nostamp(const char *, ...) __printflike(1, 2); 279 280 void printf(const char *, ...) __printflike(1, 2); 281 282 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4); 283 284 int vasprintf(char **, const char *, va_list) __printflike(2, 0); 285 286 void vprintf(const char *, va_list) __printflike(1, 0); 287 288 int vsnprintf(char *, size_t, const char *, va_list) __printflike(3, 0); 289 290 void vprintf_flags(int, const char *, va_list) __printflike(2, 0); 291 292 void printf_flags(int, const char *, ...) __printflike(2, 3); 293 294 int humanize_number(char *, size_t, uint64_t, const char *, int); 295 296 void twiddle(void); 297 void banner(void); 298 #endif /* _KERNEL */ 299 300 void panic(const char *, ...) __dead __printflike(1, 2); 301 void vpanic(const char *, va_list) __dead __printflike(1, 0); 302 void uprintf(const char *, ...) __printflike(1, 2); 303 void uprintf_locked(const char *, ...) __printflike(1, 2); 304 void ttyprintf(struct tty *, const char *, ...) __printflike(2, 3); 305 306 int format_bytes(char *, size_t, uint64_t); 307 308 void tablefull(const char *, const char *); 309 310 #if defined(_KERNEL) && defined(KASAN) 311 int kasan_kcopy(const void *, void *, size_t); 312 #define kcopy kasan_kcopy 313 #elif defined(_KERNEL) && defined(KCSAN) 314 int kcsan_kcopy(const void *, void *, size_t); 315 #define kcopy kcsan_kcopy 316 #elif defined(_KERNEL) && defined(KMSAN) 317 int kmsan_kcopy(const void *, void *, size_t); 318 #define kcopy kmsan_kcopy 319 #else 320 int kcopy(const void *, void *, size_t); 321 #endif 322 323 #ifdef _KERNEL 324 #define bcopy(src, dst, len) memcpy((dst), (src), (len)) 325 #define bzero(src, len) memset((src), 0, (len)) 326 #define bcmp(a, b, len) memcmp((a), (b), (len)) 327 #endif /* KERNEL */ 328 329 int copystr(const void *, void *, size_t, size_t *); 330 #if defined(_KERNEL) && defined(KASAN) 331 int kasan_copyinstr(const void *, void *, size_t, size_t *); 332 int kasan_copyoutstr(const void *, void *, size_t, size_t *); 333 int kasan_copyin(const void *, void *, size_t); 334 int copyout(const void *, void *, size_t); 335 #define copyinstr kasan_copyinstr 336 #define copyoutstr kasan_copyoutstr 337 #define copyin kasan_copyin 338 #elif defined(_KERNEL) && defined(KCSAN) 339 int kcsan_copyinstr(const void *, void *, size_t, size_t *); 340 int kcsan_copyoutstr(const void *, void *, size_t, size_t *); 341 int kcsan_copyin(const void *, void *, size_t); 342 int kcsan_copyout(const void *, void *, size_t); 343 #define copyinstr kcsan_copyinstr 344 #define copyoutstr kcsan_copyoutstr 345 #define copyin kcsan_copyin 346 #define copyout kcsan_copyout 347 #elif defined(_KERNEL) && defined(KMSAN) 348 int kmsan_copyinstr(const void *, void *, size_t, size_t *); 349 int kmsan_copyoutstr(const void *, void *, size_t, size_t *); 350 int kmsan_copyin(const void *, void *, size_t); 351 int kmsan_copyout(const void *, void *, size_t); 352 #define copyinstr kmsan_copyinstr 353 #define copyoutstr kmsan_copyoutstr 354 #define copyin kmsan_copyin 355 #define copyout kmsan_copyout 356 #else 357 int copyinstr(const void *, void *, size_t, size_t *); 358 int copyoutstr(const void *, void *, size_t, size_t *); 359 int copyin(const void *, void *, size_t); 360 int copyout(const void *, void *, size_t); 361 #endif 362 363 #ifdef _KERNEL 364 typedef int (*copyin_t)(const void *, void *, size_t); 365 typedef int (*copyout_t)(const void *, void *, size_t); 366 #endif 367 368 int copyin_proc(struct proc *, const void *, void *, size_t); 369 int copyout_proc(struct proc *, const void *, void *, size_t); 370 int copyin_pid(pid_t, const void *, void *, size_t); 371 int copyin_vmspace(struct vmspace *, const void *, void *, size_t); 372 int copyout_vmspace(struct vmspace *, const void *, void *, size_t); 373 374 int ioctl_copyin(int ioctlflags, const void *src, void *dst, size_t len); 375 int ioctl_copyout(int ioctlflags, const void *src, void *dst, size_t len); 376 377 int ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 378 #ifdef _LP64 379 int ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 380 #endif 381 int ucas_ptr(volatile void *, void *, void *, void *); 382 int ucas_int(volatile unsigned int *, unsigned int, unsigned int, 383 unsigned int *); 384 int ufetch_8(const uint8_t *, uint8_t *); 385 int ufetch_16(const uint16_t *, uint16_t *); 386 int ufetch_32(const uint32_t *, uint32_t *); 387 #ifdef _LP64 388 int ufetch_64(const uint64_t *, uint64_t *); 389 #endif 390 int ufetch_char(const unsigned char *, unsigned char *); 391 int ufetch_short(const unsigned short *, unsigned short *); 392 int ufetch_int(const unsigned int *, unsigned int *); 393 int ufetch_long(const unsigned long *, unsigned long *); 394 int ufetch_ptr(const void **, void **); 395 int ustore_8(uint8_t *, uint8_t); 396 int ustore_16(uint16_t *, uint16_t); 397 int ustore_32(uint32_t *, uint32_t); 398 #ifdef _LP64 399 int ustore_64(uint64_t *, uint64_t); 400 #endif 401 int ustore_char(unsigned char *, unsigned char); 402 int ustore_short(unsigned short *, unsigned short); 403 int ustore_int(unsigned int *, unsigned int); 404 int ustore_long(unsigned long *, unsigned long); 405 int ustore_ptr(void **, void *); 406 407 #ifdef __UCAS_PRIVATE 408 409 #if defined(__HAVE_UCAS_FULL) && defined(KASAN) 410 int kasan__ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 411 #ifdef __HAVE_UCAS_MP 412 int kasan__ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 413 #endif /* __HAVE_UCAS_MP */ 414 #ifdef _LP64 415 int kasan__ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 416 #ifdef __HAVE_UCAS_MP 417 int kasan__ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 418 #endif /* __HAVE_UCAS_MP */ 419 #endif /* _LP64 */ 420 #define _ucas_32 kasan__ucas_32 421 #define _ucas_32_mp kasan__ucas_32_mp 422 #define _ucas_64 kasan__ucas_64 423 #define _ucas_64_mp kasan__ucas_64_mp 424 #elif defined(__HAVE_UCAS_FULL) && defined(KMSAN) 425 int kmsan__ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 426 #ifdef __HAVE_UCAS_MP 427 int kmsan__ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 428 #endif /* __HAVE_UCAS_MP */ 429 #ifdef _LP64 430 int kmsan__ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 431 #ifdef __HAVE_UCAS_MP 432 int kmsan__ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 433 #endif /* __HAVE_UCAS_MP */ 434 #endif /* _LP64 */ 435 #define _ucas_32 kmsan__ucas_32 436 #define _ucas_32_mp kmsan__ucas_32_mp 437 #define _ucas_64 kmsan__ucas_64 438 #define _ucas_64_mp kmsan__ucas_64_mp 439 #else 440 int _ucas_32(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 441 #ifdef __HAVE_UCAS_MP 442 int _ucas_32_mp(volatile uint32_t *, uint32_t, uint32_t, uint32_t *); 443 #endif /* __HAVE_UCAS_MP */ 444 #ifdef _LP64 445 int _ucas_64(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 446 #ifdef __HAVE_UCAS_MP 447 int _ucas_64_mp(volatile uint64_t *, uint64_t, uint64_t, uint64_t *); 448 #endif /* __HAVE_UCAS_MP */ 449 #endif /* _LP64 */ 450 #endif 451 452 #endif /* __UCAS_PRIVATE */ 453 454 #ifdef __UFETCHSTORE_PRIVATE 455 456 #if defined(KASAN) 457 int kasan__ufetch_8(const uint8_t *, uint8_t *); 458 int kasan__ufetch_16(const uint16_t *, uint16_t *); 459 int kasan__ufetch_32(const uint32_t *, uint32_t *); 460 #ifdef _LP64 461 int kasan__ufetch_64(const uint64_t *, uint64_t *); 462 #endif 463 int _ustore_8(uint8_t *, uint8_t); 464 int _ustore_16(uint16_t *, uint16_t); 465 int _ustore_32(uint32_t *, uint32_t); 466 #ifdef _LP64 467 int _ustore_64(uint64_t *, uint64_t); 468 #endif 469 #define _ufetch_8 kasan__ufetch_8 470 #define _ufetch_16 kasan__ufetch_16 471 #define _ufetch_32 kasan__ufetch_32 472 #define _ufetch_64 kasan__ufetch_64 473 #elif defined(KMSAN) 474 int kmsan__ufetch_8(const uint8_t *, uint8_t *); 475 int kmsan__ufetch_16(const uint16_t *, uint16_t *); 476 int kmsan__ufetch_32(const uint32_t *, uint32_t *); 477 #ifdef _LP64 478 int kmsan__ufetch_64(const uint64_t *, uint64_t *); 479 #endif 480 int kmsan__ustore_8(uint8_t *, uint8_t); 481 int kmsan__ustore_16(uint16_t *, uint16_t); 482 int kmsan__ustore_32(uint32_t *, uint32_t); 483 #ifdef _LP64 484 int kmsan__ustore_64(uint64_t *, uint64_t); 485 #endif 486 #define _ufetch_8 kmsan__ufetch_8 487 #define _ufetch_16 kmsan__ufetch_16 488 #define _ufetch_32 kmsan__ufetch_32 489 #define _ufetch_64 kmsan__ufetch_64 490 #define _ustore_8 kmsan__ustore_8 491 #define _ustore_16 kmsan__ustore_16 492 #define _ustore_32 kmsan__ustore_32 493 #define _ustore_64 kmsan__ustore_64 494 #else 495 int _ufetch_8(const uint8_t *, uint8_t *); 496 int _ufetch_16(const uint16_t *, uint16_t *); 497 int _ufetch_32(const uint32_t *, uint32_t *); 498 #ifdef _LP64 499 int _ufetch_64(const uint64_t *, uint64_t *); 500 #endif 501 int _ustore_8(uint8_t *, uint8_t); 502 int _ustore_16(uint16_t *, uint16_t); 503 int _ustore_32(uint32_t *, uint32_t); 504 #ifdef _LP64 505 int _ustore_64(uint64_t *, uint64_t); 506 #endif 507 #endif 508 509 #endif /* __UFETCHSTORE_PRIVATE */ 510 511 void hardclock(struct clockframe *); 512 void softclock(void *); 513 void statclock(struct clockframe *); 514 515 #ifdef NTP 516 void ntp_init(void); 517 #ifdef PPS_SYNC 518 struct timespec; 519 void hardpps(struct timespec *, long); 520 #endif /* PPS_SYNC */ 521 #else 522 void ntp_init(void); /* also provides adjtime() functionality */ 523 #endif /* NTP */ 524 525 void ssp_init(void); 526 527 void initclocks(void); 528 void inittodr(time_t); 529 void resettodr(void); 530 void cpu_initclocks(void); 531 void setrootfstime(time_t); 532 533 void startprofclock(struct proc *); 534 void stopprofclock(struct proc *); 535 void proftick(struct clockframe *); 536 void setstatclockrate(int); 537 538 /* 539 * Critical polling hooks. Functions to be run while the kernel stays 540 * elevated IPL for a "long" time. (watchdogs). 541 */ 542 void *critpollhook_establish(void (*)(void *), void *); 543 void critpollhook_disestablish(void *); 544 void docritpollhooks(void); 545 546 /* 547 * Shutdown hooks. Functions to be run with all interrupts disabled 548 * immediately before the system is halted or rebooted. 549 */ 550 void *shutdownhook_establish(void (*)(void *), void *); 551 void shutdownhook_disestablish(void *); 552 void doshutdownhooks(void); 553 554 /* 555 * Power management hooks. 556 */ 557 void *powerhook_establish(const char *, void (*)(int, void *), void *); 558 void powerhook_disestablish(void *); 559 void dopowerhooks(int); 560 #define PWR_RESUME 0 561 #define PWR_SUSPEND 1 562 #define PWR_STANDBY 2 563 #define PWR_SOFTRESUME 3 564 #define PWR_SOFTSUSPEND 4 565 #define PWR_SOFTSTANDBY 5 566 #define PWR_NAMES \ 567 "resume", /* 0 */ \ 568 "suspend", /* 1 */ \ 569 "standby", /* 2 */ \ 570 "softresume", /* 3 */ \ 571 "softsuspend", /* 4 */ \ 572 "softstandby" /* 5 */ 573 574 /* 575 * Mountroot hooks (and mountroot declaration). Device drivers establish 576 * these to be executed just before (*mountroot)() if the passed device is 577 * selected as the root device. 578 */ 579 580 #define ROOT_FSTYPE_ANY "?" 581 582 extern const char *rootfstype; 583 void *mountroothook_establish(void (*)(device_t), device_t); 584 void mountroothook_disestablish(void *); 585 void mountroothook_destroy(void); 586 void domountroothook(device_t); 587 588 /* 589 * Exec hooks. Subsystems may want to do cleanup when a process 590 * execs. 591 */ 592 void *exechook_establish(void (*)(struct proc *, void *), void *); 593 void exechook_disestablish(void *); 594 void doexechooks(struct proc *); 595 596 /* 597 * Exit hooks. Subsystems may want to do cleanup when a process exits. 598 */ 599 void *exithook_establish(void (*)(struct proc *, void *), void *); 600 void exithook_disestablish(void *); 601 void doexithooks(struct proc *); 602 603 /* 604 * Fork hooks. Subsystems may want to do special processing when a process 605 * forks. 606 */ 607 void *forkhook_establish(void (*)(struct proc *, struct proc *)); 608 void forkhook_disestablish(void *); 609 void doforkhooks(struct proc *, struct proc *); 610 611 /* 612 * kernel syscall tracing/debugging hooks. 613 */ 614 #ifdef _KERNEL 615 bool trace_is_enabled(struct proc *); 616 int trace_enter(register_t, const struct sysent *, const void *); 617 void trace_exit(register_t, const struct sysent *, const void *, 618 register_t [], int); 619 #endif 620 621 int uiomove(void *, size_t, struct uio *); 622 int uiomove_frombuf(void *, size_t, struct uio *); 623 624 #ifdef _KERNEL 625 int setjmp(label_t *) __returns_twice; 626 void longjmp(label_t *) __dead; 627 #endif 628 629 void consinit(void); 630 631 void cpu_startup(void); 632 void cpu_configure(void); 633 void cpu_bootconf(void); 634 void cpu_rootconf(void); 635 void cpu_dumpconf(void); 636 637 #ifdef GPROF 638 void kmstartup(void); 639 #endif 640 641 void machdep_init(void); 642 643 #ifdef _KERNEL 644 #include <lib/libkern/libkern.h> 645 646 /* 647 * Stuff to handle debugger magic key sequences. 648 */ 649 #define CNS_LEN 128 650 #define CNS_MAGIC_VAL(x) ((x)&0x1ff) 651 #define CNS_MAGIC_NEXT(x) (((x)>>9)&0x7f) 652 #define CNS_TERM 0x7f /* End of sequence */ 653 654 typedef struct cnm_state { 655 int cnm_state; 656 u_short *cnm_magic; 657 } cnm_state_t; 658 659 /* Override db_console() in MD headers */ 660 #ifndef cn_trap 661 #define cn_trap() console_debugger() 662 #endif 663 #ifndef cn_isconsole 664 #ifndef WSDISPLAY_MULTICONS 665 #define cn_isconsole(d) (cn_tab != NULL && (d) == cn_tab->cn_dev) 666 #else 667 bool wsdisplay_cn_isconsole(dev_t); 668 #define cn_isconsole(d) wsdisplay_cn_isconsole(d) 669 #endif 670 #endif 671 672 void cn_init_magic(cnm_state_t *); 673 void cn_destroy_magic(cnm_state_t *); 674 int cn_set_magic(const char *); 675 int cn_get_magic(char *, size_t); 676 /* This should be called for each byte read */ 677 #ifndef cn_check_magic 678 #define cn_check_magic(d, k, s) \ 679 do { \ 680 if (cn_isconsole(d)) { \ 681 int _v = (s).cnm_magic[(s).cnm_state]; \ 682 if ((k) == CNS_MAGIC_VAL(_v)) { \ 683 (s).cnm_state = CNS_MAGIC_NEXT(_v); \ 684 if ((s).cnm_state == CNS_TERM) { \ 685 cn_trap(); \ 686 (s).cnm_state = 0; \ 687 } \ 688 } else { \ 689 (s).cnm_state = 0; \ 690 } \ 691 } \ 692 } while (/* CONSTCOND */ 0) 693 #endif 694 695 /* Encode out-of-band events this way when passing to cn_check_magic() */ 696 #define CNC_BREAK 0x100 697 698 #if defined(DDB) || defined(sun3) || defined(sun2) 699 /* note that cpu_Debugger() is always available on sun[23] */ 700 void cpu_Debugger(void); 701 #define Debugger cpu_Debugger 702 #endif 703 704 #ifdef DDB 705 /* 706 * Enter debugger(s) from console attention if enabled 707 */ 708 extern int db_fromconsole; /* XXX ddb/ddbvar.h */ 709 #define console_debugger() if (db_fromconsole) Debugger() 710 #elif defined(Debugger) 711 #define console_debugger() Debugger() 712 #else 713 #define console_debugger() do {} while (/* CONSTCOND */ 0) /* NOP */ 714 #endif 715 716 /* For SYSCALL_DEBUG */ 717 void scdebug_init(void); 718 void scdebug_call(register_t, const register_t[]); 719 void scdebug_ret(register_t, int, const register_t[]); 720 721 void kernel_lock_init(void); 722 void _kernel_lock(int); 723 void _kernel_unlock(int, int *); 724 bool _kernel_locked_p(void); 725 726 void kernconfig_lock_init(void); 727 void kernconfig_lock(void); 728 void kernconfig_unlock(void); 729 bool kernconfig_is_held(void); 730 #endif 731 732 #if defined(MULTIPROCESSOR) || defined(MODULAR) || defined(_MODULE) 733 #define KERNEL_LOCK(count, lwp) \ 734 do { \ 735 if ((count) != 0) \ 736 _kernel_lock((count)); \ 737 } while (/* CONSTCOND */ 0) 738 #define KERNEL_UNLOCK(all, lwp, p) _kernel_unlock((all), (p)) 739 #define KERNEL_LOCKED_P() _kernel_locked_p() 740 #else 741 #define KERNEL_LOCK(count, lwp) do {(void)(count); (void)(lwp);} while (/* CONSTCOND */ 0) /*NOP*/ 742 #define KERNEL_UNLOCK(all, lwp, ptr) do {(void)(all); (void)(lwp); (void)(ptr);} while (/* CONSTCOND */ 0) /*NOP*/ 743 #define KERNEL_LOCKED_P() (true) 744 #endif 745 746 #define KERNEL_UNLOCK_LAST(l) KERNEL_UNLOCK(-1, (l), NULL) 747 #define KERNEL_UNLOCK_ALL(l, p) KERNEL_UNLOCK(0, (l), (p)) 748 #define KERNEL_UNLOCK_ONE(l) KERNEL_UNLOCK(1, (l), NULL) 749 750 #ifdef _KERNEL 751 /* Preemption control. */ 752 void kpreempt_disable(void); 753 void kpreempt_enable(void); 754 bool kpreempt_disabled(void); 755 756 vaddr_t calc_cache_size(vsize_t , int, int); 757 #endif 758 759 void assert_sleepable(void); 760 #if defined(DEBUG) 761 #define ASSERT_SLEEPABLE() assert_sleepable() 762 #else /* defined(DEBUG) */ 763 #define ASSERT_SLEEPABLE() do {} while (0) 764 #endif /* defined(DEBUG) */ 765 766 767 #endif /* !_SYS_SYSTM_H_ */
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