1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 #ifndef _SYS_PARAM_H 40 #define _SYS_PARAM_H 41 42 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 43 #include <sys/types.h> 44 #include <sys/isa_defs.h> 45 #endif /* _ASM */ 46 47 48 #ifdef __cplusplus 49 extern "C" { 50 #endif 51 52 /* 53 * Fundamental variables; don't change too often. 54 */ 55 56 /* 57 * _POSIX_VDISABLE has historically been defined in <sys/param.h> since 58 * an early merge with AT&T source. It has also historically been defined 59 * in <sys/termios.h>. The POSIX standard, IEEE Std. 1003.1-1988 initially 60 * required the existence of _POSIX_VDISABLE in <sys/termios.h>. 61 * Subsequent versions of the IEEE Standard as well as the X/Open 62 * specifications required that _POSIX_VDISABLE be defined in <unistd.h> 63 * while still allowing for it's existence in other headers. With the 64 * introduction of XPG6, _POSIX_VDISABLE can only be defined in <unistd.h>. 65 */ 66 #if !defined(_XPG6) || defined(__EXTENSIONS__) 67 #ifndef _POSIX_VDISABLE 68 #define _POSIX_VDISABLE 0 /* Disable special character functions */ 69 #endif 70 #endif /* !defined(_XPG6) || defined(__EXTENSIONS__) */ 71 72 #ifndef MAX_INPUT 73 #define MAX_INPUT 512 /* Maximum bytes stored in the input queue */ 74 #endif 75 76 #ifndef MAX_CANON 77 #define MAX_CANON 256 /* Maximum bytes for canonical processing */ 78 #endif 79 80 #define UID_NOBODY 60001 /* user ID no body */ 81 #define GID_NOBODY UID_NOBODY 82 #define UID_UNKNOWN 96 83 #define GID_UNKNOWN UID_UNKNOWN 84 #define GID_SYS 3 85 #define UID_DLADM 15 86 #define UID_NOACCESS 60002 /* user ID no access */ 87 88 #ifdef _KERNEL 89 #define MAX_TASKID 999999 90 #define MAX_MAXPID 999999 91 #define MAXEPHUID 0xfffffffcu /* max ephemeral user id */ 92 93 #define FAMOUS_PID_SCHED 0 94 #define FAMOUS_PID_INIT 1 95 #define FAMOUS_PID_PAGEOUT 2 96 #define FAMOUS_PID_FSFLUSH 3 97 #define FAMOUS_PIDS 4 98 #endif 99 100 #ifdef DEBUG 101 #define DEFAULT_MAXPID 999999 102 #define DEFAULT_JUMPPID 100000 103 #else 104 #define DEFAULT_MAXPID 30000 105 #define DEFAULT_JUMPPID 0 106 #endif 107 108 #define MAXUID 2147483647 /* max user id */ 109 110 #define MAXPROJID MAXUID /* max project id */ 111 #define MAXLINK 32767 /* max links */ 112 113 #define MINEPHUID 0x80000000u /* min ephemeral user id */ 114 115 #define NMOUNT 40 /* est. of # mountable fs for quota calc */ 116 117 #define CANBSIZ 256 /* max size of typewriter line */ 118 119 #define NOFILE 20 /* this define is here for */ 120 /* compatibility purposes only */ 121 /* and will be removed in a */ 122 /* later release */ 123 124 /* 125 * These define the maximum and minimum allowable values of the 126 * configurable parameter NGROUPS_MAX. 127 */ 128 #define NGROUPS_UMIN 0 129 #define NGROUPS_UMAX 1024 130 #define NGROUPS_OLDMAX 32 131 132 /* 133 * NGROUPS_MAX_DEFAULT: *MUST* match NGROUPS_MAX value in limits.h. 134 * Remember that the NFS protocol must rev. before this can be increased 135 */ 136 #define NGROUPS_MAX_DEFAULT 16 137 138 /* 139 * Default process priority. Keep it in sync with limits.h. 140 */ 141 #define NZERO 20 142 143 /* 144 * Fundamental constants of the implementation--cannot be changed easily. 145 */ 146 147 #define NBPW sizeof (int) /* number of bytes in an integer */ 148 149 #ifndef NULL 150 #if defined(_LP64) 151 #define NULL 0L 152 #else 153 #define NULL 0 154 #endif 155 #endif 156 157 #define CMASK 022 /* default mask for file creation */ 158 #define CDLIMIT (1L<<11) /* default max write address */ 159 #define NBPS 0x20000 /* Number of bytes per segment */ 160 #define NBPSCTR 512 /* Bytes per disk sector. */ 161 #define UBSIZE 512 /* unix block size. */ 162 #define SCTRSHFT 9 /* Shift for BPSECT. */ 163 164 #ifdef _LITTLE_ENDIAN 165 #define lobyte(X) (((unsigned char *)&(X))[0]) 166 #define hibyte(X) (((unsigned char *)&(X))[1]) 167 #define loword(X) (((ushort_t *)&(X))[0]) 168 #define hiword(X) (((ushort_t *)&(X))[1]) 169 #endif 170 #ifdef _BIG_ENDIAN 171 #define lobyte(X) (((unsigned char *)&(X))[1]) 172 #define hibyte(X) (((unsigned char *)&(X))[0]) 173 #define loword(X) (((ushort_t *)&(X))[1]) 174 #define hiword(X) (((ushort_t *)&(X))[0]) 175 #endif 176 177 /* REMOTE -- whether machine is primary, secondary, or regular */ 178 #define SYSNAME 9 /* # chars in system name */ 179 #define PREMOTE 39 180 181 /* 182 * MAXPATHLEN defines the longest permissible path length, 183 * including the terminating null, after expanding symbolic links. 184 * TYPICALMAXPATHLEN is used in a few places as an optimization 185 * with a local buffer on the stack to avoid kmem_alloc(). 186 * MAXSYMLINKS defines the maximum number of symbolic links 187 * that may be expanded in a path name. It should be set high 188 * enough to allow all legitimate uses, but halt infinite loops 189 * reasonably quickly. 190 * MAXNAMELEN is the length (including the terminating null) of 191 * the longest permissible file (component) name. 192 */ 193 #define MAXPATHLEN 1024 194 #define TYPICALMAXPATHLEN 64 195 #define MAXSYMLINKS 20 196 #define MAXNAMELEN 256 197 198 /* 199 * MAXLINKNAMELEN defines the longest possible permitted datalink name, 200 * including the terminating NUL. Note that this must not be larger 201 * than related networking constants such as LIFNAMSIZ. 202 */ 203 #define MAXLINKNAMELEN 32 204 205 #ifndef NADDR 206 #define NADDR 13 207 #endif 208 209 /* 210 * The following are defined to be the same as 211 * defined in /usr/include/limits.h. They are 212 * needed for pipe and FIFO compatibility. 213 */ 214 #ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */ 215 #define PIPE_BUF 5120 216 #endif /* PIPE_BUF */ 217 218 #ifndef PIPE_MAX /* max # bytes written to a pipe in a write */ 219 #define PIPE_MAX 5120 220 #endif /* PIPE_MAX */ 221 222 #ifndef NBBY 223 #define NBBY 8 /* number of bits per byte */ 224 #endif 225 226 /* macros replacing interleaving functions */ 227 #define dkblock(bp) ((bp)->b_blkno) 228 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 229 230 /* 231 * File system parameters and macros. 232 * 233 * The file system is made out of blocks of at most MAXBSIZE units, 234 * with smaller units (fragments) only in the last direct block. 235 * MAXBSIZE primarily determines the size of buffers in the buffer 236 * pool. It may be made larger without any effect on existing 237 * file systems; however making it smaller make make some file 238 * systems unmountable. 239 * 240 * Note that the blocked devices are assumed to have DEV_BSIZE 241 * "sectors" and that fragments must be some multiple of this size. 242 */ 243 #define MAXBSIZE 8192 244 #define DEV_BSIZE 512 245 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 246 #define MAXFRAG 8 247 #ifdef _SYSCALL32 248 #define MAXOFF32_T 0x7fffffff 249 #endif 250 #ifdef _LP64 251 #define MAXOFF_T 0x7fffffffffffffffl 252 #define MAXOFFSET_T 0x7fffffffffffffffl 253 #else 254 #define MAXOFF_T 0x7fffffffl 255 #ifdef _LONGLONG_TYPE 256 #define MAXOFFSET_T 0x7fffffffffffffffLL 257 #else 258 #define MAXOFFSET_T 0x7fffffff 259 #endif 260 #endif /* _LP64 */ 261 262 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 263 ((unsigned long)(bytes) >> DEV_BSHIFT) 264 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 265 ((unsigned long)(db) << DEV_BSHIFT) 266 267 /* 64 bit versions of btodb and dbtob */ 268 #define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 269 ((u_offset_t)(bytes) >> DEV_BSHIFT) 270 #define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \ 271 ((u_offset_t)(db) << DEV_BSHIFT) 272 273 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 274 #ifndef NODEV 275 #define NODEV (dev_t)(-1l) 276 #ifdef _SYSCALL32 277 #define NODEV32 (dev32_t)(-1) 278 #endif /* _SYSCALL32 */ 279 #endif /* NODEV */ 280 #endif /* _ASM */ 281 282 /* 283 * Size of arg list passed in by user. 284 */ 285 #define NCARGS32 0x100000 286 #define NCARGS64 0x200000 287 #ifdef _LP64 288 #define NCARGS NCARGS64 289 #else /* _LP64 */ 290 #define NCARGS NCARGS32 291 #endif /* _LP64 */ 292 293 /* 294 * Scale factor for scaled integers used to count 295 * %cpu time and load averages. 296 */ 297 #define FSHIFT 8 /* bits to right of fixed binary point */ 298 #define FSCALE (1<<FSHIFT) 299 300 /* 301 * Delay units are in microseconds. 302 * 303 * XXX These macros are not part of the DDI! 304 */ 305 #if defined(_KERNEL) && !defined(_ASM) 306 extern void drv_usecwait(clock_t); 307 #define DELAY(n) drv_usecwait(n) 308 #define CDELAY(c, n) \ 309 { \ 310 register int N = n; \ 311 while (--N > 0) { \ 312 if (c) \ 313 break; \ 314 drv_usecwait(1); \ 315 } \ 316 } 317 #endif /* defined(_KERNEL) && !defined(_ASM) */ 318 319 #ifdef __cplusplus 320 } 321 #endif 322 323 /* 324 * The following is to free utilities from machine dependencies within 325 * an architecture. Must be included after definition of DEV_BSIZE. 326 */ 327 328 #if (defined(_KERNEL) || defined(_KMEMUSER)) 329 330 #if defined(_MACHDEP) 331 #include <sys/machparam.h> 332 #endif 333 334 #ifdef __cplusplus 335 extern "C" { 336 #endif 337 338 #if defined(_KERNEL) && !defined(_ASM) 339 extern int cpu_decay_factor; 340 extern pid_t maxpid; 341 extern pid_t jump_pid; 342 343 extern uintptr_t _kernelbase; 344 extern uintptr_t _userlimit; 345 extern uintptr_t _userlimit32; 346 #endif /* defined(_KERNEL) && !defined(_ASM) */ 347 348 /* 349 * These three variables have been added within the #if defined(lint) 350 * below to ensure visibility to lint. This is a short term workaround 351 * to handle poor interaction between SS12 lint and these variables. 352 * CR 6742611 has been logged to address these issues. 353 */ 354 #if defined(lint) 355 extern int snooping; 356 extern uint_t snoop_interval; 357 extern const unsigned int _pageshift; 358 #endif /* lint */ 359 360 #if !defined(_MACHDEP) 361 362 /* 363 * Implementation architecture independent sections of the kernel use 364 * this section. 365 */ 366 #if defined(_KERNEL) && !defined(_ASM) 367 extern int hz; 368 extern int snooping; 369 extern uint_t snoop_interval; 370 extern const unsigned long _pagesize; 371 extern const unsigned int _pageshift; 372 extern const unsigned long _pageoffset; 373 extern const unsigned long long _pagemask; 374 extern const unsigned long _mmu_pagesize; 375 extern const unsigned int _mmu_pageshift; 376 extern const unsigned long _mmu_pageoffset; 377 extern const unsigned long _mmu_pagemask; 378 extern const uintptr_t _argsbase; 379 extern const unsigned long _defaultstksz; 380 extern const unsigned int _nbpg; 381 extern const int _ncpu; 382 extern const int _clsize; 383 #endif /* defined(_KERNEL) && !defined(_ASM) */ 384 385 #define PAGESIZE _pagesize 386 #define PAGESHIFT _pageshift 387 #define PAGEOFFSET _pageoffset 388 #define PAGEMASK _pagemask 389 #define MMU_PAGESIZE _mmu_pagesize 390 #define MMU_PAGESHIFT _mmu_pageshift 391 #define MMU_PAGEOFFSET _mmu_pageoffset 392 #define MMU_PAGEMASK _mmu_pagemask 393 394 #define KERNELBASE _kernelbase 395 #define USERLIMIT _userlimit 396 #define USERLIMIT32 _userlimit32 397 #define ARGSBASE _argsbase 398 #define DEFAULTSTKSZ _defaultstksz 399 #define NCPU _ncpu 400 401 #endif /* defined(_MACHDEP) */ 402 403 /* 404 * Some random macros for units conversion. 405 * 406 * These are machine independent but contain constants (*PAGESHIFT) which 407 * are only defined in the machine dependent file. 408 */ 409 410 /* 411 * MMU pages to bytes, and back (with and without rounding) 412 */ 413 #define mmu_ptob(x) ((x) << MMU_PAGESHIFT) 414 #define mmu_btop(x) (((x)) >> MMU_PAGESHIFT) 415 #define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT)) 416 417 /* 418 * 2 versions of pages to disk blocks 419 */ 420 #define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT)) 421 #define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT)) 422 423 /* 424 * pages to bytes, and back (with and without rounding) 425 * Large Files: The explicit cast of x to unsigned int is deliberately 426 * removed as part of large files work. We pass longlong values to 427 * theses macros. 428 * 429 * Cast the input to ptob() to be a page count. This enforces 64-bit 430 * math on 64-bit kernels. For 32-bit kernels, callers must explicitly 431 * cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE 432 * are possible. 433 */ 434 435 #ifdef _LP64 436 #define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT) 437 #else 438 #define ptob(x) ((x) << PAGESHIFT) 439 #endif /* _LP64 */ 440 #define btop(x) (((x) >> PAGESHIFT)) 441 #define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT)) 442 443 /* 444 * disk blocks to pages, rounded and truncated 445 */ 446 #define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */ 447 #define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT)) 448 #define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT)) 449 450 /* 451 * kB to pages and back 452 */ 453 #define kbtop(x) ((x) >> (PAGESHIFT - 10)) 454 #define ptokb(x) ((x) << (PAGESHIFT - 10)) 455 456 /* 457 * POSIX.4 related configuration parameters 458 */ 459 #define _AIO_LISTIO_MAX (4096) 460 #define _AIO_MAX (-1) 461 #define _MQ_OPEN_MAX (-1) 462 #define _MQ_PRIO_MAX (32) 463 #define _SEM_NSEMS_MAX INT_MAX 464 #define _SEM_VALUE_MAX INT_MAX 465 466 #ifdef __cplusplus 467 } 468 #endif 469 470 #else /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 471 472 /* 473 * The following are assorted machine dependent values which can be 474 * obtained in a machine independent manner through sysconf(2) or 475 * sysinfo(2). In order to guarantee that these provide the expected 476 * value at all times, the System Private interface (leading underscore) 477 * is used. 478 */ 479 480 #include <sys/unistd.h> 481 482 #ifdef __cplusplus 483 extern "C" { 484 #endif 485 486 #if !defined(_ASM) 487 extern long _sysconf(int); /* System Private interface to sysconf() */ 488 #endif /* !defined(_ASM) */ 489 490 #define HZ ((clock_t)_sysconf(_SC_CLK_TCK)) 491 #define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK))) 492 #define PAGESIZE (_sysconf(_SC_PAGESIZE)) 493 #define PAGEOFFSET (PAGESIZE - 1) 494 #define PAGEMASK (~PAGEOFFSET) 495 #define MAXPID ((pid_t)_sysconf(_SC_MAXPID)) 496 #define MAXEPHUID ((uid_t)_sysconf(_SC_EPHID_MAX)) 497 498 #ifdef __cplusplus 499 } 500 #endif 501 502 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) */ 503 504 #endif /* _SYS_PARAM_H */ 505