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 UID_DLADM 15 85 #define UID_NETADM 16 86 #define GID_NETADM 65 87 #define UID_NOACCESS 60002 /* user ID no access */ 88 89 #ifdef _KERNEL 90 #define MAX_TASKID 999999 91 #define MAX_MAXPID 999999 92 #define MAXEPHUID 0xfffffffcu /* max ephemeral user id */ 93 94 #define FAMOUS_PID_SCHED 0 95 #define FAMOUS_PID_INIT 1 96 #define FAMOUS_PID_PAGEOUT 2 97 #define FAMOUS_PID_FSFLUSH 3 98 #define FAMOUS_PIDS 4 99 #endif 100 101 #ifdef DEBUG 102 #define DEFAULT_MAXPID 999999 103 #define DEFAULT_JUMPPID 100000 104 #else 105 #define DEFAULT_MAXPID 30000 106 #define DEFAULT_JUMPPID 0 107 #endif 108 109 #define MAXUID 2147483647 /* max user id */ 110 111 #define MAXPROJID MAXUID /* max project id */ 112 #define MAXLINK 32767 /* max links */ 113 114 #define MINEPHUID 0x80000000u /* min ephemeral user id */ 115 116 #define NMOUNT 40 /* est. of # mountable fs for quota calc */ 117 118 #define CANBSIZ 256 /* max size of typewriter line */ 119 120 #define NOFILE 20 /* this define is here for */ 121 /* compatibility purposes only */ 122 /* and will be removed in a */ 123 /* later release */ 124 125 /* 126 * These define the maximum and minimum allowable values of the 127 * configurable parameter NGROUPS_MAX. 128 */ 129 #define NGROUPS_UMIN 0 130 #define NGROUPS_UMAX 1024 131 #define NGROUPS_OLDMAX 32 132 133 /* 134 * NGROUPS_MAX_DEFAULT: *MUST* match NGROUPS_MAX value in limits.h. 135 * Remember that the NFS protocol must rev. before this can be increased 136 */ 137 #define NGROUPS_MAX_DEFAULT 16 138 139 /* 140 * Default process priority. Keep it in sync with limits.h. 141 */ 142 #define NZERO 20 143 144 /* 145 * Fundamental constants of the implementation--cannot be changed easily. 146 */ 147 148 #define NBPW sizeof (int) /* number of bytes in an integer */ 149 150 #ifndef NULL 151 #if defined(_LP64) 152 #define NULL 0L 153 #else 154 #define NULL 0 155 #endif 156 #endif 157 158 #define CMASK 022 /* default mask for file creation */ 159 #define CDLIMIT (1L<<11) /* default max write address */ 160 #define NBPS 0x20000 /* Number of bytes per segment */ 161 #define NBPSCTR 512 /* Bytes per disk sector. */ 162 #define UBSIZE 512 /* unix block size. */ 163 #define SCTRSHFT 9 /* Shift for BPSECT. */ 164 165 #ifdef _LITTLE_ENDIAN 166 #define lobyte(X) (((unsigned char *)&(X))[0]) 167 #define hibyte(X) (((unsigned char *)&(X))[1]) 168 #define loword(X) (((ushort_t *)&(X))[0]) 169 #define hiword(X) (((ushort_t *)&(X))[1]) 170 #endif 171 #ifdef _BIG_ENDIAN 172 #define lobyte(X) (((unsigned char *)&(X))[1]) 173 #define hibyte(X) (((unsigned char *)&(X))[0]) 174 #define loword(X) (((ushort_t *)&(X))[1]) 175 #define hiword(X) (((ushort_t *)&(X))[0]) 176 #endif 177 178 /* REMOTE -- whether machine is primary, secondary, or regular */ 179 #define SYSNAME 9 /* # chars in system name */ 180 #define PREMOTE 39 181 182 /* 183 * MAXPATHLEN defines the longest permissible path length, 184 * including the terminating null, after expanding symbolic links. 185 * TYPICALMAXPATHLEN is used in a few places as an optimization 186 * with a local buffer on the stack to avoid kmem_alloc(). 187 * MAXSYMLINKS defines the maximum number of symbolic links 188 * that may be expanded in a path name. It should be set high 189 * enough to allow all legitimate uses, but halt infinite loops 190 * reasonably quickly. 191 * MAXNAMELEN is the length (including the terminating null) of 192 * the longest permissible file (component) name. 193 */ 194 #define MAXPATHLEN 1024 195 #define TYPICALMAXPATHLEN 64 196 #define MAXSYMLINKS 20 197 #define MAXNAMELEN 256 198 199 /* 200 * MAXLINKNAMELEN defines the longest possible permitted datalink name, 201 * including the terminating NUL. Note that this must not be larger 202 * than related networking constants such as LIFNAMSIZ. 203 */ 204 #define MAXLINKNAMELEN 32 205 206 #ifndef NADDR 207 #define NADDR 13 208 #endif 209 210 /* 211 * The following are defined to be the same as 212 * defined in /usr/include/limits.h. They are 213 * needed for pipe and FIFO compatibility. 214 */ 215 #ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */ 216 #define PIPE_BUF 5120 217 #endif /* PIPE_BUF */ 218 219 #ifndef PIPE_MAX /* max # bytes written to a pipe in a write */ 220 #define PIPE_MAX 5120 221 #endif /* PIPE_MAX */ 222 223 #ifndef NBBY 224 #define NBBY 8 /* number of bits per byte */ 225 #endif 226 227 /* macros replacing interleaving functions */ 228 #define dkblock(bp) ((bp)->b_blkno) 229 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 230 231 /* 232 * File system parameters and macros. 233 * 234 * The file system is made out of blocks of at most MAXBSIZE units, 235 * with smaller units (fragments) only in the last direct block. 236 * MAXBSIZE primarily determines the size of buffers in the buffer 237 * pool. It may be made larger without any effect on existing 238 * file systems; however making it smaller make make some file 239 * systems unmountable. 240 * 241 * Note that the blocked devices are assumed to have DEV_BSIZE 242 * "sectors" and that fragments must be some multiple of this size. 243 */ 244 #define MAXBSIZE 8192 245 #define DEV_BSIZE 512 246 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 247 #define MAXFRAG 8 248 #ifdef _SYSCALL32 249 #define MAXOFF32_T 0x7fffffff 250 #endif 251 #ifdef _LP64 252 #define MAXOFF_T 0x7fffffffffffffffl 253 #define MAXOFFSET_T 0x7fffffffffffffffl 254 #else 255 #define MAXOFF_T 0x7fffffffl 256 #ifdef _LONGLONG_TYPE 257 #define MAXOFFSET_T 0x7fffffffffffffffLL 258 #else 259 #define MAXOFFSET_T 0x7fffffff 260 #endif 261 #endif /* _LP64 */ 262 263 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 264 ((unsigned long)(bytes) >> DEV_BSHIFT) 265 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 266 ((unsigned long)(db) << DEV_BSHIFT) 267 268 /* 64 bit versions of btodb and dbtob */ 269 #define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 270 ((u_offset_t)(bytes) >> DEV_BSHIFT) 271 #define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \ 272 ((u_offset_t)(db) << DEV_BSHIFT) 273 274 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 275 #ifndef NODEV 276 #define NODEV (dev_t)(-1l) 277 #ifdef _SYSCALL32 278 #define NODEV32 (dev32_t)(-1) 279 #endif /* _SYSCALL32 */ 280 #endif /* NODEV */ 281 #endif /* _ASM */ 282 283 /* 284 * Size of arg list passed in by user. 285 */ 286 #define NCARGS32 0x100000 287 #define NCARGS64 0x200000 288 #ifdef _LP64 289 #define NCARGS NCARGS64 290 #else /* _LP64 */ 291 #define NCARGS NCARGS32 292 #endif /* _LP64 */ 293 294 /* 295 * Scale factor for scaled integers used to count 296 * %cpu time and load averages. 297 */ 298 #define FSHIFT 8 /* bits to right of fixed binary point */ 299 #define FSCALE (1<<FSHIFT) 300 301 /* 302 * Delay units are in microseconds. 303 * 304 * XXX These macros are not part of the DDI! 305 */ 306 #if defined(_KERNEL) && !defined(_ASM) 307 extern void drv_usecwait(clock_t); 308 #define DELAY(n) drv_usecwait(n) 309 #define CDELAY(c, n) \ 310 { \ 311 register int N = n; \ 312 while (--N > 0) { \ 313 if (c) \ 314 break; \ 315 drv_usecwait(1); \ 316 } \ 317 } 318 #endif /* defined(_KERNEL) && !defined(_ASM) */ 319 320 #ifdef __cplusplus 321 } 322 #endif 323 324 /* 325 * The following is to free utilities from machine dependencies within 326 * an architecture. Must be included after definition of DEV_BSIZE. 327 */ 328 329 #if (defined(_KERNEL) || defined(_KMEMUSER)) 330 331 #if defined(_MACHDEP) 332 #include <sys/machparam.h> 333 #endif 334 335 #ifdef __cplusplus 336 extern "C" { 337 #endif 338 339 #if defined(_KERNEL) && !defined(_ASM) 340 extern int cpu_decay_factor; 341 extern pid_t maxpid; 342 extern pid_t jump_pid; 343 344 extern uintptr_t _kernelbase; 345 extern uintptr_t _userlimit; 346 extern uintptr_t _userlimit32; 347 #endif /* defined(_KERNEL) && !defined(_ASM) */ 348 349 /* 350 * These three variables have been added within the #if defined(lint) 351 * below to ensure visibility to lint. This is a short term workaround 352 * to handle poor interaction between SS12 lint and these variables. 353 * CR 6742611 has been logged to address these issues. 354 */ 355 #if defined(lint) 356 extern int snooping; 357 extern uint_t snoop_interval; 358 extern const unsigned int _pageshift; 359 #endif /* lint */ 360 361 #if !defined(_MACHDEP) 362 363 /* 364 * Implementation architecture independent sections of the kernel use 365 * this section. 366 */ 367 #if defined(_KERNEL) && !defined(_ASM) 368 extern int hz; 369 extern int snooping; 370 extern uint_t snoop_interval; 371 extern const unsigned long _pagesize; 372 extern const unsigned int _pageshift; 373 extern const unsigned long _pageoffset; 374 extern const unsigned long long _pagemask; 375 extern const unsigned long _mmu_pagesize; 376 extern const unsigned int _mmu_pageshift; 377 extern const unsigned long _mmu_pageoffset; 378 extern const unsigned long _mmu_pagemask; 379 extern const uintptr_t _argsbase; 380 extern const unsigned long _defaultstksz; 381 extern const unsigned int _nbpg; 382 extern const int _ncpu; 383 extern const int _clsize; 384 #endif /* defined(_KERNEL) && !defined(_ASM) */ 385 386 #define PAGESIZE _pagesize 387 #define PAGESHIFT _pageshift 388 #define PAGEOFFSET _pageoffset 389 #define PAGEMASK _pagemask 390 #define MMU_PAGESIZE _mmu_pagesize 391 #define MMU_PAGESHIFT _mmu_pageshift 392 #define MMU_PAGEOFFSET _mmu_pageoffset 393 #define MMU_PAGEMASK _mmu_pagemask 394 395 #define KERNELBASE _kernelbase 396 #define USERLIMIT _userlimit 397 #define USERLIMIT32 _userlimit32 398 #define ARGSBASE _argsbase 399 #define DEFAULTSTKSZ _defaultstksz 400 #define NCPU _ncpu 401 402 #endif /* defined(_MACHDEP) */ 403 404 /* 405 * Some random macros for units conversion. 406 * 407 * These are machine independent but contain constants (*PAGESHIFT) which 408 * are only defined in the machine dependent file. 409 */ 410 411 /* 412 * MMU pages to bytes, and back (with and without rounding) 413 */ 414 #define mmu_ptob(x) ((x) << MMU_PAGESHIFT) 415 #define mmu_btop(x) (((x)) >> MMU_PAGESHIFT) 416 #define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT)) 417 418 /* 419 * 2 versions of pages to disk blocks 420 */ 421 #define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT)) 422 #define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT)) 423 424 /* 425 * pages to bytes, and back (with and without rounding) 426 * Large Files: The explicit cast of x to unsigned int is deliberately 427 * removed as part of large files work. We pass longlong values to 428 * theses macros. 429 * 430 * Cast the input to ptob() to be a page count. This enforces 64-bit 431 * math on 64-bit kernels. For 32-bit kernels, callers must explicitly 432 * cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE 433 * are possible. 434 */ 435 436 #ifdef _LP64 437 #define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT) 438 #else 439 #define ptob(x) ((x) << PAGESHIFT) 440 #endif /* _LP64 */ 441 #define btop(x) (((x) >> PAGESHIFT)) 442 #define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT)) 443 444 /* 445 * disk blocks to pages, rounded and truncated 446 */ 447 #define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */ 448 #define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT)) 449 #define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT)) 450 451 /* 452 * kB to pages and back 453 */ 454 #define kbtop(x) ((x) >> (PAGESHIFT - 10)) 455 #define ptokb(x) ((x) << (PAGESHIFT - 10)) 456 457 /* 458 * POSIX.4 related configuration parameters 459 */ 460 #define _AIO_LISTIO_MAX (4096) 461 #define _AIO_MAX (-1) 462 #define _MQ_OPEN_MAX (-1) 463 #define _MQ_PRIO_MAX (32) 464 #define _SEM_NSEMS_MAX INT_MAX 465 #define _SEM_VALUE_MAX INT_MAX 466 467 #ifdef __cplusplus 468 } 469 #endif 470 471 #else /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 472 473 /* 474 * The following are assorted machine dependent values which can be 475 * obtained in a machine independent manner through sysconf(2) or 476 * sysinfo(2). In order to guarantee that these provide the expected 477 * value at all times, the System Private interface (leading underscore) 478 * is used. 479 */ 480 481 #include <sys/unistd.h> 482 483 #ifdef __cplusplus 484 extern "C" { 485 #endif 486 487 #if !defined(_ASM) 488 extern long _sysconf(int); /* System Private interface to sysconf() */ 489 #endif /* !defined(_ASM) */ 490 491 #define HZ ((clock_t)_sysconf(_SC_CLK_TCK)) 492 #define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK))) 493 #define PAGESIZE (_sysconf(_SC_PAGESIZE)) 494 #define PAGEOFFSET (PAGESIZE - 1) 495 #define PAGEMASK (~PAGEOFFSET) 496 #define MAXPID ((pid_t)_sysconf(_SC_MAXPID)) 497 #define MAXEPHUID ((uid_t)_sysconf(_SC_EPHID_MAX)) 498 499 #ifdef __cplusplus 500 } 501 #endif 502 503 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) */ 504 505 #endif /* _SYS_PARAM_H */ 506