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 2008 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 GID_SYS 3 83 #define UID_DLADM 15 84 #define UID_NOACCESS 60002 /* user ID no access */ 85 86 #ifdef _KERNEL 87 #define MAX_TASKID 999999 88 #define MAX_MAXPID 999999 89 #define MAXEPHUID 0xfffffffcu /* max ephemeral user id */ 90 #endif 91 92 #ifdef DEBUG 93 #define DEFAULT_MAXPID 999999 94 #define DEFAULT_JUMPPID 100000 95 #else 96 #define DEFAULT_MAXPID 30000 97 #define DEFAULT_JUMPPID 0 98 99 #endif 100 101 #define MAXUID 2147483647 /* max user id */ 102 103 #define MAXPROJID MAXUID /* max project id */ 104 #define MAXLINK 32767 /* max links */ 105 106 #define MINEPHUID 0x80000000u /* min ephemeral user id */ 107 108 #define NMOUNT 40 /* est. of # mountable fs for quota calc */ 109 110 #define CANBSIZ 256 /* max size of typewriter line */ 111 112 #define NOFILE 20 /* this define is here for */ 113 /* compatibility purposes only */ 114 /* and will be removed in a */ 115 /* later release */ 116 117 /* 118 * These define the maximum and minimum allowable values of the 119 * configurable parameter NGROUPS_MAX. 120 */ 121 #define NGROUPS_UMIN 0 122 #define NGROUPS_UMAX 32 123 124 /* 125 * NGROUPS_MAX_DEFAULT: *MUST* match NGROUPS_MAX value in limits.h. 126 * Remember that the NFS protocol must rev. before this can be increased 127 */ 128 #define NGROUPS_MAX_DEFAULT 16 129 130 /* 131 * Default process priority. Keep it in sync with limits.h. 132 */ 133 #define NZERO 20 134 135 /* 136 * Fundamental constants of the implementation--cannot be changed easily. 137 */ 138 139 #define NBPW sizeof (int) /* number of bytes in an integer */ 140 141 #ifndef NULL 142 #if defined(_LP64) 143 #define NULL 0L 144 #else 145 #define NULL 0 146 #endif 147 #endif 148 149 #define CMASK 022 /* default mask for file creation */ 150 #define CDLIMIT (1L<<11) /* default max write address */ 151 #define NBPS 0x20000 /* Number of bytes per segment */ 152 #define NBPSCTR 512 /* Bytes per disk sector. */ 153 #define UBSIZE 512 /* unix block size. */ 154 #define SCTRSHFT 9 /* Shift for BPSECT. */ 155 156 #ifdef _LITTLE_ENDIAN 157 #define lobyte(X) (((unsigned char *)&(X))[0]) 158 #define hibyte(X) (((unsigned char *)&(X))[1]) 159 #define loword(X) (((ushort_t *)&(X))[0]) 160 #define hiword(X) (((ushort_t *)&(X))[1]) 161 #endif 162 #ifdef _BIG_ENDIAN 163 #define lobyte(X) (((unsigned char *)&(X))[1]) 164 #define hibyte(X) (((unsigned char *)&(X))[0]) 165 #define loword(X) (((ushort_t *)&(X))[1]) 166 #define hiword(X) (((ushort_t *)&(X))[0]) 167 #endif 168 169 /* REMOTE -- whether machine is primary, secondary, or regular */ 170 #define SYSNAME 9 /* # chars in system name */ 171 #define PREMOTE 39 172 173 /* 174 * MAXPATHLEN defines the longest permissible path length, 175 * including the terminating null, after expanding symbolic links. 176 * TYPICALMAXPATHLEN is used in a few places as an optimization 177 * with a local buffer on the stack to avoid kmem_alloc(). 178 * MAXSYMLINKS defines the maximum number of symbolic links 179 * that may be expanded in a path name. It should be set high 180 * enough to allow all legitimate uses, but halt infinite loops 181 * reasonably quickly. 182 * MAXNAMELEN is the length (including the terminating null) of 183 * the longest permissible file (component) name. 184 */ 185 #define MAXPATHLEN 1024 186 #define TYPICALMAXPATHLEN 64 187 #define MAXSYMLINKS 20 188 #define MAXNAMELEN 256 189 190 /* 191 * MAXLINKNAMELEN defines the longest possible permitted datalink name, 192 * including the terminating NUL. Note that this must not be larger 193 * than related networking constants such as LIFNAMSIZ. 194 */ 195 #define MAXLINKNAMELEN 32 196 197 #ifndef NADDR 198 #define NADDR 13 199 #endif 200 201 /* 202 * The following are defined to be the same as 203 * defined in /usr/include/limits.h. They are 204 * needed for pipe and FIFO compatibility. 205 */ 206 #ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */ 207 #define PIPE_BUF 5120 208 #endif /* PIPE_BUF */ 209 210 #ifndef PIPE_MAX /* max # bytes written to a pipe in a write */ 211 #define PIPE_MAX 5120 212 #endif /* PIPE_MAX */ 213 214 #ifndef NBBY 215 #define NBBY 8 /* number of bits per byte */ 216 #endif 217 218 /* macros replacing interleaving functions */ 219 #define dkblock(bp) ((bp)->b_blkno) 220 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 221 222 /* 223 * File system parameters and macros. 224 * 225 * The file system is made out of blocks of at most MAXBSIZE units, 226 * with smaller units (fragments) only in the last direct block. 227 * MAXBSIZE primarily determines the size of buffers in the buffer 228 * pool. It may be made larger without any effect on existing 229 * file systems; however making it smaller make make some file 230 * systems unmountable. 231 * 232 * Note that the blocked devices are assumed to have DEV_BSIZE 233 * "sectors" and that fragments must be some multiple of this size. 234 */ 235 #define MAXBSIZE 8192 236 #define DEV_BSIZE 512 237 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 238 #define MAXFRAG 8 239 #ifdef _SYSCALL32 240 #define MAXOFF32_T 0x7fffffff 241 #endif 242 #ifdef _LP64 243 #define MAXOFF_T 0x7fffffffffffffffl 244 #define MAXOFFSET_T 0x7fffffffffffffffl 245 #else 246 #define MAXOFF_T 0x7fffffffl 247 #ifdef _LONGLONG_TYPE 248 #define MAXOFFSET_T 0x7fffffffffffffffLL 249 #else 250 #define MAXOFFSET_T 0x7fffffff 251 #endif 252 #endif /* _LP64 */ 253 254 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 255 ((unsigned long)(bytes) >> DEV_BSHIFT) 256 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 257 ((unsigned long)(db) << DEV_BSHIFT) 258 259 /* 64 bit versions of btodb and dbtob */ 260 #define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 261 ((u_offset_t)(bytes) >> DEV_BSHIFT) 262 #define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \ 263 ((u_offset_t)(db) << DEV_BSHIFT) 264 265 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 266 #ifndef NODEV 267 #define NODEV (dev_t)(-1l) 268 #ifdef _SYSCALL32 269 #define NODEV32 (dev32_t)(-1) 270 #endif /* _SYSCALL32 */ 271 #endif /* NODEV */ 272 #endif /* _ASM */ 273 274 /* 275 * Size of arg list passed in by user. 276 */ 277 #define NCARGS32 0x100000 278 #define NCARGS64 0x200000 279 #ifdef _LP64 280 #define NCARGS NCARGS64 281 #else /* _LP64 */ 282 #define NCARGS NCARGS32 283 #endif /* _LP64 */ 284 285 /* 286 * Scale factor for scaled integers used to count 287 * %cpu time and load averages. 288 */ 289 #define FSHIFT 8 /* bits to right of fixed binary point */ 290 #define FSCALE (1<<FSHIFT) 291 292 /* 293 * Delay units are in microseconds. 294 * 295 * XXX These macros are not part of the DDI! 296 */ 297 #if defined(_KERNEL) && !defined(_ASM) 298 extern void drv_usecwait(clock_t); 299 #define DELAY(n) drv_usecwait(n) 300 #define CDELAY(c, n) \ 301 { \ 302 register int N = n; \ 303 while (--N > 0) { \ 304 if (c) \ 305 break; \ 306 drv_usecwait(1); \ 307 } \ 308 } 309 #endif /* defined(_KERNEL) && !defined(_ASM) */ 310 311 #ifdef __cplusplus 312 } 313 #endif 314 315 /* 316 * The following is to free utilities from machine dependencies within 317 * an architecture. Must be included after definition of DEV_BSIZE. 318 */ 319 320 #if (defined(_KERNEL) || defined(_KMEMUSER)) 321 322 #if defined(_MACHDEP) 323 #include <sys/machparam.h> 324 #endif 325 326 #ifdef __cplusplus 327 extern "C" { 328 #endif 329 330 #if defined(_KERNEL) && !defined(_ASM) 331 extern int cpu_decay_factor; 332 extern pid_t maxpid; 333 extern pid_t jump_pid; 334 335 extern uintptr_t _kernelbase; 336 extern uintptr_t _userlimit; 337 extern uintptr_t _userlimit32; 338 #endif /* defined(_KERNEL) && !defined(_ASM) */ 339 340 /* 341 * These three variables have been added within the #if defined(lint) 342 * below to ensure visibility to lint. This is a short term workaround 343 * to handle poor interaction between SS12 lint and these variables. 344 * CR 6742611 has been logged to address these issues. 345 */ 346 #if defined(lint) 347 extern int snooping; 348 extern uint_t snoop_interval; 349 extern const unsigned int _pageshift; 350 #endif /* lint */ 351 352 #if !defined(_MACHDEP) 353 354 /* 355 * Implementation architecture independent sections of the kernel use 356 * this section. 357 */ 358 #if defined(_KERNEL) && !defined(_ASM) 359 extern int hz; 360 extern int snooping; 361 extern uint_t snoop_interval; 362 extern const unsigned long _pagesize; 363 extern const unsigned int _pageshift; 364 extern const unsigned long _pageoffset; 365 extern const unsigned long long _pagemask; 366 extern const unsigned long _mmu_pagesize; 367 extern const unsigned int _mmu_pageshift; 368 extern const unsigned long _mmu_pageoffset; 369 extern const unsigned long _mmu_pagemask; 370 extern const uintptr_t _argsbase; 371 extern const unsigned long _defaultstksz; 372 extern const unsigned int _nbpg; 373 extern const int _ncpu; 374 extern const int _clsize; 375 #endif /* defined(_KERNEL) && !defined(_ASM) */ 376 377 #define PAGESIZE _pagesize 378 #define PAGESHIFT _pageshift 379 #define PAGEOFFSET _pageoffset 380 #define PAGEMASK _pagemask 381 #define MMU_PAGESIZE _mmu_pagesize 382 #define MMU_PAGESHIFT _mmu_pageshift 383 #define MMU_PAGEOFFSET _mmu_pageoffset 384 #define MMU_PAGEMASK _mmu_pagemask 385 386 #define KERNELBASE _kernelbase 387 #define USERLIMIT _userlimit 388 #define USERLIMIT32 _userlimit32 389 #define ARGSBASE _argsbase 390 #define DEFAULTSTKSZ _defaultstksz 391 #define NCPU _ncpu 392 393 #endif /* defined(_MACHDEP) */ 394 395 /* 396 * Some random macros for units conversion. 397 * 398 * These are machine independent but contain constants (*PAGESHIFT) which 399 * are only defined in the machine dependent file. 400 */ 401 402 /* 403 * MMU pages to bytes, and back (with and without rounding) 404 */ 405 #define mmu_ptob(x) ((x) << MMU_PAGESHIFT) 406 #define mmu_btop(x) (((x)) >> MMU_PAGESHIFT) 407 #define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT)) 408 409 /* 410 * 2 versions of pages to disk blocks 411 */ 412 #define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT)) 413 #define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT)) 414 415 /* 416 * pages to bytes, and back (with and without rounding) 417 * Large Files: The explicit cast of x to unsigned int is deliberately 418 * removed as part of large files work. We pass longlong values to 419 * theses macros. 420 * 421 * Cast the input to ptob() to be a page count. This enforces 64-bit 422 * math on 64-bit kernels. For 32-bit kernels, callers must explicitly 423 * cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE 424 * are possible. 425 */ 426 427 #ifdef _LP64 428 #define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT) 429 #else 430 #define ptob(x) ((x) << PAGESHIFT) 431 #endif /* _LP64 */ 432 #define btop(x) (((x) >> PAGESHIFT)) 433 #define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT)) 434 435 /* 436 * disk blocks to pages, rounded and truncated 437 */ 438 #define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */ 439 #define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT)) 440 #define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT)) 441 442 /* 443 * kB to pages and back 444 */ 445 #define kbtop(x) ((x) >> (PAGESHIFT - 10)) 446 #define ptokb(x) ((x) << (PAGESHIFT - 10)) 447 448 /* 449 * POSIX.4 related configuration parameters 450 */ 451 #define _AIO_LISTIO_MAX (4096) 452 #define _AIO_MAX (-1) 453 #define _MQ_OPEN_MAX (-1) 454 #define _MQ_PRIO_MAX (32) 455 #define _SEM_NSEMS_MAX INT_MAX 456 #define _SEM_VALUE_MAX INT_MAX 457 458 #ifdef __cplusplus 459 } 460 #endif 461 462 #else /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 463 464 /* 465 * The following are assorted machine dependent values which can be 466 * obtained in a machine independent manner through sysconf(2) or 467 * sysinfo(2). In order to guarantee that these provide the expected 468 * value at all times, the System Private interface (leading underscore) 469 * is used. 470 */ 471 472 #include <sys/unistd.h> 473 474 #ifdef __cplusplus 475 extern "C" { 476 #endif 477 478 #if !defined(_ASM) 479 extern long _sysconf(int); /* System Private interface to sysconf() */ 480 #endif /* !defined(_ASM) */ 481 482 #define HZ ((clock_t)_sysconf(_SC_CLK_TCK)) 483 #define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK))) 484 #define PAGESIZE (_sysconf(_SC_PAGESIZE)) 485 #define PAGEOFFSET (PAGESIZE - 1) 486 #define PAGEMASK (~PAGEOFFSET) 487 #define MAXPID ((pid_t)_sysconf(_SC_MAXPID)) 488 #define MAXEPHUID ((uid_t)_sysconf(_SC_EPHID_MAX)) 489 490 #ifdef __cplusplus 491 } 492 #endif 493 494 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) */ 495 496 #endif /* _SYS_PARAM_H */ 497