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 2007 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 #ifndef NADDR 192 #define NADDR 13 193 #endif 194 195 /* 196 * The following are defined to be the same as 197 * defined in /usr/include/limits.h. They are 198 * needed for pipe and FIFO compatibility. 199 */ 200 #ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */ 201 #define PIPE_BUF 5120 202 #endif /* PIPE_BUF */ 203 204 #ifndef PIPE_MAX /* max # bytes written to a pipe in a write */ 205 #define PIPE_MAX 5120 206 #endif /* PIPE_MAX */ 207 208 #ifndef NBBY 209 #define NBBY 8 /* number of bits per byte */ 210 #endif 211 212 /* macros replacing interleaving functions */ 213 #define dkblock(bp) ((bp)->b_blkno) 214 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 215 216 /* 217 * File system parameters and macros. 218 * 219 * The file system is made out of blocks of at most MAXBSIZE units, 220 * with smaller units (fragments) only in the last direct block. 221 * MAXBSIZE primarily determines the size of buffers in the buffer 222 * pool. It may be made larger without any effect on existing 223 * file systems; however making it smaller make make some file 224 * systems unmountable. 225 * 226 * Note that the blocked devices are assumed to have DEV_BSIZE 227 * "sectors" and that fragments must be some multiple of this size. 228 */ 229 #define MAXBSIZE 8192 230 #define DEV_BSIZE 512 231 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 232 #define MAXFRAG 8 233 #ifdef _SYSCALL32 234 #define MAXOFF32_T 0x7fffffff 235 #endif 236 #ifdef _LP64 237 #define MAXOFF_T 0x7fffffffffffffffl 238 #define MAXOFFSET_T 0x7fffffffffffffffl 239 #else 240 #define MAXOFF_T 0x7fffffffl 241 #ifdef _LONGLONG_TYPE 242 #define MAXOFFSET_T 0x7fffffffffffffffLL 243 #else 244 #define MAXOFFSET_T 0x7fffffff 245 #endif 246 #endif /* _LP64 */ 247 248 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 249 ((unsigned long)(bytes) >> DEV_BSHIFT) 250 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 251 ((unsigned long)(db) << DEV_BSHIFT) 252 253 /* 64 bit versions of btodb and dbtob */ 254 #define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 255 ((u_offset_t)(bytes) >> DEV_BSHIFT) 256 #define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \ 257 ((u_offset_t)(db) << DEV_BSHIFT) 258 259 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 260 #ifndef NODEV 261 #define NODEV (dev_t)(-1l) 262 #ifdef _SYSCALL32 263 #define NODEV32 (dev32_t)(-1) 264 #endif /* _SYSCALL32 */ 265 #endif /* NODEV */ 266 #endif /* _ASM */ 267 268 /* 269 * Size of arg list passed in by user. 270 */ 271 #define NCARGS32 0x100000 272 #define NCARGS64 0x200000 273 #ifdef _LP64 274 #define NCARGS NCARGS64 275 #else /* _LP64 */ 276 #define NCARGS NCARGS32 277 #endif /* _LP64 */ 278 279 /* 280 * Scale factor for scaled integers used to count 281 * %cpu time and load averages. 282 */ 283 #define FSHIFT 8 /* bits to right of fixed binary point */ 284 #define FSCALE (1<<FSHIFT) 285 286 /* 287 * Delay units are in microseconds. 288 * 289 * XXX These macros are not part of the DDI! 290 */ 291 #if defined(_KERNEL) && !defined(_ASM) 292 extern void drv_usecwait(clock_t); 293 #define DELAY(n) drv_usecwait(n) 294 #define CDELAY(c, n) \ 295 { \ 296 register int N = n; \ 297 while (--N > 0) { \ 298 if (c) \ 299 break; \ 300 drv_usecwait(1); \ 301 } \ 302 } 303 #endif /* defined(_KERNEL) && !defined(_ASM) */ 304 305 #ifdef __cplusplus 306 } 307 #endif 308 309 /* 310 * The following is to free utilities from machine dependencies within 311 * an architecture. Must be included after definition of DEV_BSIZE. 312 */ 313 314 #if (defined(_KERNEL) || defined(_KMEMUSER)) 315 316 #if defined(_MACHDEP) 317 #include <sys/machparam.h> 318 #endif 319 320 #ifdef __cplusplus 321 extern "C" { 322 #endif 323 324 #if defined(_KERNEL) && !defined(_ASM) 325 extern int cpu_decay_factor; 326 extern pid_t maxpid; 327 extern pid_t jump_pid; 328 329 extern uintptr_t _kernelbase; 330 extern uintptr_t _userlimit; 331 extern uintptr_t _userlimit32; 332 #endif /* defined(_KERNEL) && !defined(_ASM) */ 333 334 335 #if !defined(_MACHDEP) 336 337 /* 338 * Implementation architecture independent sections of the kernel use 339 * this section. 340 */ 341 #if defined(_KERNEL) && !defined(_ASM) 342 extern int hz; 343 extern int snooping; 344 extern uint_t snoop_interval; 345 extern const unsigned long _pagesize; 346 extern const unsigned int _pageshift; 347 extern const unsigned long _pageoffset; 348 extern const unsigned long long _pagemask; 349 extern const unsigned long _mmu_pagesize; 350 extern const unsigned int _mmu_pageshift; 351 extern const unsigned long _mmu_pageoffset; 352 extern const unsigned long _mmu_pagemask; 353 extern const uintptr_t _argsbase; 354 extern const unsigned long _defaultstksz; 355 extern const unsigned int _nbpg; 356 extern const int _ncpu; 357 extern const int _clsize; 358 #endif /* defined(_KERNEL) && !defined(_ASM) */ 359 360 #define PAGESIZE _pagesize 361 #define PAGESHIFT _pageshift 362 #define PAGEOFFSET _pageoffset 363 #define PAGEMASK _pagemask 364 #define MMU_PAGESIZE _mmu_pagesize 365 #define MMU_PAGESHIFT _mmu_pageshift 366 #define MMU_PAGEOFFSET _mmu_pageoffset 367 #define MMU_PAGEMASK _mmu_pagemask 368 369 #define KERNELBASE _kernelbase 370 #define USERLIMIT _userlimit 371 #define USERLIMIT32 _userlimit32 372 #define ARGSBASE _argsbase 373 #define DEFAULTSTKSZ _defaultstksz 374 #define NCPU _ncpu 375 376 #endif /* defined(_MACHDEP) */ 377 378 /* 379 * Some random macros for units conversion. 380 * 381 * These are machine independent but contain constants (*PAGESHIFT) which 382 * are only defined in the machine dependent file. 383 */ 384 385 /* 386 * MMU pages to bytes, and back (with and without rounding) 387 */ 388 #define mmu_ptob(x) ((x) << MMU_PAGESHIFT) 389 #define mmu_btop(x) (((x)) >> MMU_PAGESHIFT) 390 #define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT)) 391 392 /* 393 * 2 versions of pages to disk blocks 394 */ 395 #define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT)) 396 #define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT)) 397 398 /* 399 * pages to bytes, and back (with and without rounding) 400 * Large Files: The explicit cast of x to unsigned int is deliberately 401 * removed as part of large files work. We pass longlong values to 402 * theses macros. 403 * 404 * Cast the input to ptob() to be a page count. This enforces 64-bit 405 * math on 64-bit kernels. For 32-bit kernels, callers must explicitly 406 * cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE 407 * are possible. 408 */ 409 410 #ifdef _LP64 411 #define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT) 412 #else 413 #define ptob(x) ((x) << PAGESHIFT) 414 #endif /* _LP64 */ 415 #define btop(x) (((x) >> PAGESHIFT)) 416 #define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT)) 417 418 /* 419 * disk blocks to pages, rounded and truncated 420 */ 421 #define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */ 422 #define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT)) 423 #define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT)) 424 425 /* 426 * kB to pages and back 427 */ 428 #define kbtop(x) ((x) >> (PAGESHIFT - 10)) 429 #define ptokb(x) ((x) << (PAGESHIFT - 10)) 430 431 /* 432 * POSIX.4 related configuration parameters 433 */ 434 #define _AIO_LISTIO_MAX (4096) 435 #define _AIO_MAX (-1) 436 #define _MQ_OPEN_MAX (-1) 437 #define _MQ_PRIO_MAX (32) 438 #define _SEM_NSEMS_MAX INT_MAX 439 #define _SEM_VALUE_MAX INT_MAX 440 441 #ifdef __cplusplus 442 } 443 #endif 444 445 #else /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 446 447 /* 448 * The following are assorted machine dependent values which can be 449 * obtained in a machine independent manner through sysconf(2) or 450 * sysinfo(2). In order to guarantee that these provide the expected 451 * value at all times, the System Private interface (leading underscore) 452 * is used. 453 */ 454 455 #include <sys/unistd.h> 456 457 #ifdef __cplusplus 458 extern "C" { 459 #endif 460 461 #if !defined(_ASM) 462 extern long _sysconf(int); /* System Private interface to sysconf() */ 463 #endif /* !defined(_ASM) */ 464 465 #define HZ ((clock_t)_sysconf(_SC_CLK_TCK)) 466 #define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK))) 467 #define PAGESIZE (_sysconf(_SC_PAGESIZE)) 468 #define PAGEOFFSET (PAGESIZE - 1) 469 #define PAGEMASK (~PAGEOFFSET) 470 #define MAXPID ((pid_t)_sysconf(_SC_MAXPID)) 471 #define MAXEPHUID ((uid_t)_sysconf(_SC_EPHID_MAX)) 472 473 #ifdef __cplusplus 474 } 475 #endif 476 477 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) */ 478 479 #endif /* _SYS_PARAM_H */ 480