1 /* $NetBSD: param.h,v 1.735 2024/08/27 00:57:35 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)param.h 8.3 (Berkeley) 4/4/95 37 */ 38 39 #ifndef _SYS_PARAM_H_ 40 #define _SYS_PARAM_H_ 41 42 #ifdef _KERNEL_OPT 43 #include "opt_param.h" 44 #endif 45 46 /* 47 * Historic BSD #defines -- probably will remain untouched for all time. 48 */ 49 #define BSD 199506 /* System version (year & month). */ 50 #define BSD4_3 1 51 #define BSD4_4 1 52 53 /* 54 * #define __NetBSD_Version__ MMmmrrpp00 55 * 56 * M = major version 57 * m = minor version; a minor number of 99 indicates current. 58 * r = 0 (*) or patchlevel in 9.99 59 * p = patchlevel 60 * 61 * When new releases are made, src/gnu/usr.bin/groff/tmac/mdoc.local 62 * needs to be updated and the changes sent back to the groff maintainers. 63 * 64 * (*) Up to 2.0I "release" used to be "",A-Z,Z[A-Z] but numeric 65 * e.g. NetBSD-1.2D = 102040000 ('D' == 4) 66 * NetBSD-2.0H (200080000) was changed on 20041001 to: 67 * 2.99.9 (299000900) 68 */ 69 70 #define __NetBSD_Version__ 1099001200 /* NetBSD 10.99.12 */ 71 72 #define __NetBSD_Prereq__(M,m,p) (((((M) * 100000000) + \ 73 (m) * 1000000) + (p) * 100) <= __NetBSD_Version__) 74 75 /* 76 * Historical NetBSD #define 77 * 78 * NetBSD 1.4 was the last release for which this value was incremented. 79 * The value is now permanently fixed at 199905. It will never be 80 * changed again. 81 * 82 * New code must use __NetBSD_Version__ instead, and should not even 83 * count on NetBSD being defined. 84 * 85 */ 86 87 #define NetBSD 199905 /* NetBSD version (year & month). */ 88 89 /* 90 * These macros determine if we are running in protected mode or not. 91 * _HARDKERNEL: code uses kernel namespace and runs in hw privileged mode 92 * _SOFTKERNEL: code uses kernel namespace but runs without hw privileges 93 */ 94 #if defined(_KERNEL) && !defined(_RUMPKERNEL) 95 #define _HARDKERNEL 96 #endif 97 #if defined(_KERNEL) && defined(_RUMPKERNEL) 98 #define _SOFTKERNEL 99 #endif 100 101 #include <sys/null.h> 102 103 #ifndef __ASSEMBLER__ 104 #include <sys/inttypes.h> 105 #include <sys/types.h> 106 107 /* 108 * Machine-independent constants (some used in following include files). 109 * Redefined constants are from POSIX 1003.1 limits file. 110 * 111 * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>) 112 * MAXHOSTNAMELEN should be >= (_POSIX_HOST_NAME_MAX + 1) (see <limits.h>) 113 * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>) 114 */ 115 #include <sys/syslimits.h> 116 117 #define MAXCOMLEN 16 /* max command name remembered */ 118 #define MAXINTERP PATH_MAX /* max interpreter file name length */ 119 /* DEPRECATED: use LOGIN_NAME_MAX instead. */ 120 #define MAXLOGNAME (LOGIN_NAME_MAX - 1) /* max login name length */ 121 #define NCARGS ARG_MAX /* max bytes for an exec function */ 122 #define NGROUPS NGROUPS_MAX /* max number groups */ 123 #define NOGROUP 65535 /* marker for empty group set member */ 124 #define MAXHOSTNAMELEN 256 /* max hostname size */ 125 126 #ifndef NOFILE 127 #define NOFILE OPEN_MAX /* max open files per process */ 128 #endif 129 #ifndef MAXUPRC /* max simultaneous processes */ 130 #define MAXUPRC CHILD_MAX /* POSIX 1003.1-compliant default */ 131 #else 132 #if (MAXUPRC - 0) < CHILD_MAX 133 #error MAXUPRC less than CHILD_MAX. See options(4) for details. 134 #endif /* (MAXUPRC - 0) < CHILD_MAX */ 135 #endif /* !defined(MAXUPRC) */ 136 137 /* Macros for min/max. */ 138 #define MIN(a,b) ((/*CONSTCOND*/(a)<(b))?(a):(b)) 139 #define MAX(a,b) ((/*CONSTCOND*/(a)>(b))?(a):(b)) 140 141 /* Machine type dependent parameters. */ 142 #include <machine/param.h> 143 #include <machine/limits.h> 144 145 /* 146 * Coherency unit: assumed cache line size. See also MIN_LWP_ALIGNMENT. 147 * The MD code depends on the current values of these constants. Don't 148 * change them without coordinating. 149 */ 150 #ifndef COHERENCY_UNIT 151 #define COHERENCY_UNIT 64 152 #endif 153 #ifndef CACHE_LINE_SIZE 154 #define CACHE_LINE_SIZE 64 155 #endif 156 157 /* More types and definitions used throughout the kernel. */ 158 #ifdef _KERNEL 159 #include <sys/cdefs.h> 160 #include <sys/errno.h> 161 #include <sys/time.h> 162 #include <sys/resource.h> 163 #include <sys/ucred.h> 164 #include <sys/uio.h> 165 #include <uvm/uvm_param.h> 166 #ifndef NPROC 167 #define NPROC (20 + 16 * MAXUSERS) 168 #endif 169 #ifndef MAXFILES 170 #define MAXFILES (3 * (NPROC + MAXUSERS) + 80) 171 #define MAXFILES_IMPLICIT 172 #endif 173 #ifndef NTEXT 174 #define NTEXT (80 + NPROC / 8) /* actually the object cache */ 175 #endif 176 #ifndef NVNODE 177 #define NVNODE (NPROC + NTEXT + 100) 178 #define NVNODE_IMPLICIT 179 #endif 180 #ifndef VNODE_KMEM_MAXPCT 181 #define VNODE_KMEM_MAXPCT 60 182 #endif 183 #ifndef BUFCACHE_VA_MAXPCT 184 #define BUFCACHE_VA_MAXPCT 20 185 #endif 186 #define VNODE_COST 2048 /* assumed space in bytes */ 187 #endif /* _KERNEL */ 188 189 /* Signals. */ 190 #include <sys/signal.h> 191 192 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 193 #define DEV_BSIZE (1 << DEV_BSHIFT) /* 512 */ 194 195 #ifndef BLKDEV_IOSIZE 196 #define BLKDEV_IOSIZE 2048 197 #endif 198 199 #ifndef MAXPHYS 200 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 201 #endif 202 203 /* pages ("clicks") to disk blocks */ 204 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 205 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 206 207 /* bytes to pages */ 208 #define ctob(x) ((x) << PGSHIFT) 209 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 210 211 /* bytes to disk blocks */ 212 #define dbtob(x) ((x) << DEV_BSHIFT) 213 #define btodb(x) ((x) >> DEV_BSHIFT) 214 215 #ifndef MAXCPUS 216 #define MAXCPUS 32 217 #endif 218 #ifndef MAX_LWP_PER_PROC 219 #define MAX_LWP_PER_PROC 8000 220 #endif 221 222 /* 223 * Stack macros. On most architectures, the stack grows down, 224 * towards lower addresses; it is the rare architecture where 225 * it grows up, towards higher addresses. 226 * 227 * STACK_GROW and STACK_SHRINK adjust a stack pointer by some 228 * size, no questions asked. STACK_ALIGN aligns a stack pointer. 229 * 230 * STACK_ALLOC returns a pointer to allocated stack space of 231 * some size; given such a pointer and a size, STACK_MAX gives 232 * the maximum (in the "maxsaddr" sense) stack address of the 233 * allocated memory. 234 */ 235 #if defined(_KERNEL) || defined(__EXPOSE_STACK) 236 237 #ifndef STACK_ALIGNBYTES 238 #define STACK_ALIGNBYTES __ALIGNBYTES 239 #endif 240 241 #ifdef __MACHINE_STACK_GROWS_UP 242 #define STACK_GROW(sp, _size) (((char *)(void *)(sp)) + (_size)) 243 #define STACK_SHRINK(sp, _size) (((char *)(void *)(sp)) - (_size)) 244 #define STACK_ALIGN(sp, bytes) \ 245 ((char *)((((unsigned long)(sp)) + (bytes)) & ~(bytes))) 246 #define STACK_ALLOC(sp, _size) ((char *)(void *)(sp)) 247 #define STACK_MAX(p, _size) (((char *)(void *)(p)) + (_size)) 248 #else 249 #define STACK_GROW(sp, _size) (((char *)(void *)(sp)) - (_size)) 250 #define STACK_SHRINK(sp, _size) (((char *)(void *)(sp)) + (_size)) 251 #define STACK_ALIGN(sp, bytes) \ 252 ((char *)(((unsigned long)(sp)) & ~(bytes))) 253 #define STACK_ALLOC(sp, _size) (((char *)(void *)(sp)) - (_size)) 254 #define STACK_MAX(p, _size) ((char *)(void *)(p)) 255 #endif 256 #define STACK_LEN_ALIGN(len, bytes) (((len) + (bytes)) & ~(bytes)) 257 258 #endif /* defined(_KERNEL) || defined(__EXPOSE_STACK) */ 259 260 /* 261 * Round p (pointer or byte index) up to a correctly-aligned value for all 262 * data types (int, long, ...). The result is uintptr_t and must be cast to 263 * any desired pointer type. 264 * 265 * ALIGNED_POINTER is a boolean macro that checks whether an address 266 * is valid to fetch data elements of type t from on this architecture 267 * using ALIGNED_POINTER_LOAD. This does not reflect the optimal 268 * alignment, just the possibility (within reasonable limits). 269 * 270 * uint32_t x; 271 * unsigned char *p = ...; 272 * 273 * if (ALIGNED_POINTER(p, uint32_t)) { 274 * uint32_t t; 275 * ALIGNED_POINTER_LOAD(&t, p, uint32_t); 276 * x = t; 277 * } else { 278 * uint32_t t; 279 * memcpy(&t, p, sizeof(t)); 280 * x = t; 281 * } 282 * 283 */ 284 #define ALIGNBYTES __ALIGNBYTES 285 #ifndef ALIGN 286 #define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) & ~ALIGNBYTES) 287 #endif 288 #ifndef ALIGNED_POINTER 289 #define ALIGNED_POINTER(p,t) ((((uintptr_t)(p)) & (__alignof(t) - 1)) == 0) 290 #endif 291 #ifndef ALIGNED_POINTER_LOAD 292 #define ALIGNED_POINTER_LOAD(q,p,t) (*(q) = *((const t *)(p))) 293 #endif 294 295 /* 296 * Return if pointer p is accessible for type t. For primitive types 297 * this means that the pointer itself can be dereferenced; for structures 298 * and unions this means that any field can be dereferenced. On CPUs 299 * that allow unaligned pointer access, we always return that the pointer 300 * is accessible to prevent unnecessary copies, although this might not be 301 * necessarily faster. 302 */ 303 #ifdef __NO_STRICT_ALIGNMENT 304 #define ACCESSIBLE_POINTER(p, t) 1 305 #else 306 #define ACCESSIBLE_POINTER(p, t) ALIGNED_POINTER(p, t) 307 #endif 308 309 /* 310 * Historic priority levels. These are meaningless and remain only 311 * for source compatibility. Do not use in new code. 312 */ 313 #define PSWP 0 314 #define PVM 4 315 #define PINOD 8 316 #define PRIBIO 16 317 #define PVFS 20 318 #define PZERO 22 319 #define PSOCK 24 320 #define PWAIT 32 321 #define PLOCK 36 322 #define PPAUSE 40 323 #define PUSER 50 324 #define MAXPRI 127 325 326 #define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ 327 #define PNORELOCK 0x200 /* OR'd with pri for tsleep to not relock */ 328 329 /* 330 * New priority levels. 331 */ 332 #define PRI_COUNT 224 333 #define PRI_NONE (-1) 334 335 #define PRI_KERNEL_RT 192 336 #define NPRI_KERNEL_RT 32 337 #define MAXPRI_KERNEL_RT (PRI_KERNEL_RT + NPRI_KERNEL_RT - 1) 338 339 #define PRI_USER_RT 128 340 #define NPRI_USER_RT 64 341 #define MAXPRI_USER_RT (PRI_USER_RT + NPRI_USER_RT - 1) 342 343 #define PRI_KTHREAD 96 344 #define NPRI_KTHREAD 32 345 #define MAXPRI_KTHREAD (PRI_KTHREAD + NPRI_KTHREAD - 1) 346 347 #define PRI_KERNEL 64 348 #define NPRI_KERNEL 32 349 #define MAXPRI_KERNEL (PRI_KERNEL + NPRI_KERNEL - 1) 350 351 #define PRI_USER 0 352 #define NPRI_USER 64 353 #define MAXPRI_USER (PRI_USER + NPRI_USER - 1) 354 355 /* Priority range used by POSIX real-time features */ 356 #define SCHED_PRI_MIN 0 357 #define SCHED_PRI_MAX 63 358 359 /* 360 * Kernel thread priorities. 361 */ 362 #define PRI_SOFTSERIAL MAXPRI_KERNEL_RT 363 #define PRI_SOFTNET (MAXPRI_KERNEL_RT - schedppq * 1) 364 #define PRI_SOFTBIO (MAXPRI_KERNEL_RT - schedppq * 2) 365 #define PRI_SOFTCLOCK (MAXPRI_KERNEL_RT - schedppq * 3) 366 367 #define PRI_XCALL MAXPRI_KTHREAD 368 #define PRI_PGDAEMON (MAXPRI_KTHREAD - schedppq * 1) 369 #define PRI_VM (MAXPRI_KTHREAD - schedppq * 2) 370 #define PRI_IOFLUSH (MAXPRI_KTHREAD - schedppq * 3) 371 #define PRI_BIO (MAXPRI_KTHREAD - schedppq * 4) 372 373 #define PRI_IDLE PRI_USER 374 375 /* 376 * Miscellaneous. 377 */ 378 #define NBPW sizeof(int) /* number of bytes per word (integer) */ 379 380 #define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ 381 #define NODEV (dev_t)(-1) /* non-existent device */ 382 383 /* 384 * File system parameters and macros. 385 * 386 * The file system is made out of blocks of at most MAXBSIZE units, with 387 * smaller units (fragments) only in the last direct block. MAXBSIZE 388 * primarily determines the size of buffers in the buffer pool. It may be 389 * made larger without any effect on existing file systems; however making 390 * it smaller may make some file systems unmountable. 391 */ 392 #ifndef MAXBSIZE /* XXX */ 393 #define MAXBSIZE MAXPHYS 394 #endif 395 #define MAXFRAG 8 396 397 /* 398 * MAXPATHLEN defines the longest permissible path length after 399 * expanding symbolic links, including a trailing null terminator 400 * byte. It is used to allocate a temporary buffer from the buffer 401 * pool in which to do the name expansion, hence should be a power of 402 * two, and must be less than or equal to MAXBSIZE. It must be the 403 * same as PATH_MAX from <limits.h>. 404 * 405 * MAXSYMLINKS defines the maximum number of symbolic links that may 406 * be expanded in a path name. It should be set high enough to allow 407 * all legitimate uses, but halt infinite loops reasonably quickly. 408 * 409 * MAXSYMLINKS should be >= _POSIX_SYMLOOP_MAX (see <limits.h>) 410 */ 411 #define MAXPATHLEN PATH_MAX 412 #define MAXSYMLINKS 32 413 414 /* 415 * This is the maximum individual filename component length enforced by 416 * namei. Filesystems cannot exceed this limit. The upper bound for that 417 * limit is NAME_MAX. We don't bump it for now, for compatibility with 418 * old binaries during the time where MAXNAMLEN was 511 and NAME_MAX was 419 * 255 420 */ 421 #define KERNEL_NAME_MAX 255 422 423 /* Bit map related macros. */ 424 #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) 425 #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) 426 #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) 427 #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) 428 429 /* Macros for counting and rounding. */ 430 #ifndef howmany 431 #define howmany(x, y) (((x)+((y)-1))/(y)) 432 #endif 433 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) 434 #define rounddown(x,y) (((x)/(y))*(y)) 435 436 /* 437 * Rounding to powers of two. The naive definitions of roundup2 and 438 * rounddown2, 439 * 440 * #define roundup2(x,m) (((x) + ((m) - 1)) & ~((m) - 1)) 441 * #define rounddown2(x,m) ((x) & ~((m) - 1)), 442 * 443 * exhibit a quirk of integer arithmetic in C because the complement 444 * happens in the type of m, not in the type of x. So if unsigned int 445 * is 32-bit, and m is an unsigned int while x is a uint64_t, then 446 * roundup2 and rounddown2 would have the unintended effect of clearing 447 * the upper 32 bits of the result(!). These definitions avoid the 448 * pitfalls of C arithmetic depending on the types of x and m, and 449 * additionally avoid multiply evaluating their arguments. 450 */ 451 #define roundup2(x,m) ((((x) - 1) | ((m) - 1)) + 1) 452 #define rounddown2(x,m) ((x) & ~((__typeof__(x))((m) - 1))) 453 454 #define powerof2(x) ((((x)-1)&(x))==0) 455 456 /* 457 * Constants for setting the parameters of the kernel memory allocator. 458 * 459 * 2 ** MINBUCKET is the smallest unit of memory that will be 460 * allocated. It must be at least large enough to hold a pointer. 461 * 462 * Units of memory less or equal to MAXALLOCSAVE will permanently 463 * allocate physical memory; requests for these size pieces of 464 * memory are quite fast. Allocations greater than MAXALLOCSAVE must 465 * always allocate and free physical memory; requests for these 466 * size allocations should be done infrequently as they will be slow. 467 * 468 * Constraints: NBPG <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and 469 * MAXALLOCSAVE must be a power of two. 470 */ 471 #ifdef _LP64 472 #define MINBUCKET 5 /* 5 => min allocation of 32 bytes */ 473 #else 474 #define MINBUCKET 4 /* 4 => min allocation of 16 bytes */ 475 #endif 476 #define MAXALLOCSAVE (2 * NBPG) 477 478 /* 479 * Scale factor for scaled integers used to count %cpu time and load avgs. 480 * 481 * The number of CPU `tick's that map to a unique `%age' can be expressed 482 * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that 483 * can be calculated (assuming 32 bits) can be closely approximated using 484 * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15). 485 * 486 * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age', 487 * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024. 488 */ 489 #define FSHIFT 11 /* bits to right of fixed binary point */ 490 #define FSCALE (1<<FSHIFT) 491 492 /* 493 * The time for a process to be blocked before being very swappable. 494 * This is a number of seconds which the system takes as being a non-trivial 495 * amount of real time. You probably shouldn't change this; 496 * it is used in subtle ways (fractions and multiples of it are, that is, like 497 * half of a ``long time'', almost a long time, etc.) 498 * It is related to human patience and other factors which don't really 499 * change over time. 500 */ 501 #define MAXSLP 20 502 503 /* 504 * Defaults for Unified Buffer Cache parameters. 505 * These may be overridden in <machine/param.h>. 506 */ 507 508 #ifndef UBC_WINSHIFT 509 #define UBC_WINSHIFT 13 510 #endif 511 #ifndef UBC_NWINS 512 #define UBC_NWINS 1024 513 #endif 514 515 #ifdef _KERNEL 516 extern int hz; 517 /* 518 * macro to convert from milliseconds to hz without integer overflow 519 * The 32 bit version uses only 32bit arithmetic; 0x20000 is safe for hz < 20000 520 * the 64 bit version does the computation directly. 521 */ 522 #ifndef mstohz 523 # ifdef _LP64 524 # define mstohz(ms) ((unsigned int)((ms + 0ul) * hz / 1000ul)) 525 # else 526 static __inline unsigned int 527 mstohz(unsigned int ms) 528 { 529 return __predict_false(ms >= 0x20000u) ? 530 (ms / 1000u) * hz : (ms * hz) / 1000u; 531 } 532 # endif 533 #endif 534 535 #ifndef hztoms 536 # ifdef _LP64 537 # define hztoms(t) ((unsigned int)(((t) + 0ul) * 1000ul / hz)) 538 # else 539 static __inline unsigned int 540 hztoms(unsigned int t) 541 { 542 return __predict_false(t >= 0x20000u) ? 543 (t / hz) * 1000u : (t * 1000u) / hz; 544 } 545 # endif 546 #endif 547 548 #define hz2bintime(t) (ms2bintime(hztoms(t))) 549 550 extern const int schedppq; 551 extern size_t coherency_unit; 552 553 #endif /* _KERNEL */ 554 555 /* 556 * Minimum alignment of "struct lwp" needed by the architecture. This 557 * counts when packing a lock byte into a word alongside a pointer to an 558 * LWP. We need a minimum of 32, but go with the cache line size. 559 */ 560 #ifndef MIN_LWP_ALIGNMENT 561 # if COHERENCY_UNIT > 32 562 # define MIN_LWP_ALIGNMENT COHERENCY_UNIT 563 # else 564 # define MIN_LWP_ALIGNMENT 32 565 # endif 566 #endif 567 #endif /* !__ASSEMBLER__ */ 568 569 #endif /* !_SYS_PARAM_H_ */ 570