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