X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/55e303ae13a4cf49d70f2294092726f2fffb9ef2..c6bf4f310a33a9262d455ea4d3f0630b1255e3fe:/bsd/sys/param.h diff --git a/bsd/sys/param.h b/bsd/sys/param.h index 775912b4b..ca57a6725 100644 --- a/bsd/sys/param.h +++ b/bsd/sys/param.h @@ -1,17 +1,20 @@ /* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ - * - * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. - * + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ + * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in - * compliance with the License. Please obtain a copy of the License at - * http://www.opensource.apple.com/apsl/ and read it before using this - * file. - * + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. + * + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, @@ -19,8 +22,8 @@ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. - * - * @APPLE_LICENSE_HEADER_END@ + * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */ /*- @@ -63,19 +66,18 @@ * @(#)param.h 8.3 (Berkeley) 4/4/95 */ -#ifndef _SYS_PARAM_H_ +#ifndef _SYS_PARAM_H_ #define _SYS_PARAM_H_ -#define BSD 199506 /* System version (year & month). */ -#define BSD4_3 1 -#define BSD4_4 1 +#define BSD 199506 /* System version (year & month). */ +#define BSD4_3 1 +#define BSD4_4 1 -#define NeXTBSD 1995064 /* NeXTBSD version (year, month, release) */ -#define NeXTBSD4_0 0 /* NeXTBSD 4.0 */ +#define NeXTBSD 1995064 /* NeXTBSD version (year, month, release) */ +#define NeXTBSD4_0 0 /* NeXTBSD 4.0 */ -#ifndef NULL -#define NULL 0 -#endif +#include +#include #ifndef LOCORE #include @@ -90,16 +92,16 @@ */ #include -#define MAXCOMLEN 16 /* max command name remembered */ -#define MAXINTERP 64 /* max interpreter file name length */ -#define MAXLOGNAME 255 /* max login name length */ -#define MAXUPRC CHILD_MAX /* max simultaneous processes */ -#define NCARGS ARG_MAX /* max bytes for an exec function */ -#define NGROUPS NGROUPS_MAX /* max number groups */ -#define NOFILE 256 /* default max open files per process */ -#define NOGROUP 65535 /* marker for empty group set member */ -#define MAXHOSTNAMELEN 256 /* max hostname size */ -#define MAXDOMNAMELEN 256 /* maximum domain name length */ +#define MAXCOMLEN 16 /* max command name remembered */ +#define MAXINTERP 64 /* max interpreter file name length */ +#define MAXLOGNAME 255 /* max login name length */ +#define MAXUPRC CHILD_MAX /* max simultaneous processes */ +#define NCARGS ARG_MAX /* max bytes for an exec function */ +#define NGROUPS NGROUPS_MAX /* max number groups */ +#define NOFILE 256 /* default max open files per process */ +#define NOGROUP 65535 /* marker for empty group set member */ +#define MAXHOSTNAMELEN 256 /* max hostname size */ +#define MAXDOMNAMELEN 256 /* maximum domain name length */ /* Machine type dependent parameters. */ #include @@ -124,69 +126,73 @@ * Priorities. Note that with 32 run queues, differences less than 4 are * insignificant. */ -#define PSWP 0 -#define PVM 4 -#define PINOD 8 -#define PRIBIO 16 -#define PVFS 20 -#define PZERO 22 /* No longer magic, shouldn't be here. XXX */ -#define PSOCK 24 -#define PWAIT 32 -#define PLOCK 36 -#define PPAUSE 40 -#define PUSER 50 -#define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */ - -#define PRIMASK 0x0ff -#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ -#define PTTYBLOCK 0x200 /* for tty SIGTTOU and SIGTTIN blocking */ +#define PSWP 0 +#define PVM 4 +#define PINOD 8 +#define PRIBIO 16 +#define PVFS 20 +#define PZERO 22 /* No longer magic, shouldn't be here. XXX */ +#define PSOCK 24 +#define PWAIT 32 +#define PLOCK 36 +#define PPAUSE 40 +#define PUSER 50 +#define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */ -#define NZERO 0 /* default "nice" */ +#define PRIMASK 0x0ff +#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ +#define PTTYBLOCK 0x200 /* for tty SIGTTOU and SIGTTIN blocking */ +#define PDROP 0x400 /* OR'd with pri to stop re-aquistion of mutex upon wakeup */ +#define PSPIN 0x800 /* OR'd with pri to require mutex in spin mode upon wakeup */ -#define NBPW sizeof(int) /* number of bytes per word (integer) */ +#define NBPW sizeof(int) /* number of bytes per word (integer) */ -#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ -#define NODEV (dev_t)(-1) /* non-existent device */ +#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ +#define NODEV (dev_t)(-1) /* non-existent device */ /* * Clustering of hardware pages on machines with ridiculously small * page sizes is done here. The paging subsystem deals with units of * CLSIZE pte's describing NBPG (from machine/param.h) pages each. */ -#define CLBYTES (CLSIZE*NBPG) -#define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */ -#define claligned(x) ((((int)(x))&CLOFSET)==0) -#define CLOFF CLOFSET -#define CLSHIFT (PGSHIFT+CLSIZELOG2) +#define CLBYTES (CLSIZE*NBPG) +#define CLOFSET (CLSIZE*NBPG-1) /* for clusters, like PGOFSET */ +#define claligned(x) ((((int)(x))&CLOFSET)==0) +#define CLOFF CLOFSET +#define CLSHIFT (PGSHIFT+CLSIZELOG2) -#if CLSIZE==1 -#define clbase(i) (i) -#define clrnd(i) (i) +#if CLSIZE == 1 +#define clbase(i) (i) +#define clrnd(i) (i) #else /* Give the base virtual address (first of CLSIZE). */ -#define clbase(i) ((i) &~ (CLSIZE-1)) +#define clbase(i) ((i) &~ (CLSIZE-1)) /* Round a number of clicks up to a whole cluster. */ -#define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) +#define clrnd(i) (((i) + (CLSIZE-1)) &~ (CLSIZE-1)) #endif -#define CBLOCK 64 /* Clist block size, must be a power of 2. */ -#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */ - /* Data chars/clist. */ -#define CBSIZE (CBLOCK - sizeof(struct cblock *) - CBQSIZE) -#define CROUND (CBLOCK - 1) /* Clist rounding. */ +#define CBLOCK 64 /* Clist block size, must be a power of 2. */ +#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */ + /* Data chars/clist. */ +#define CBSIZE (CBLOCK - sizeof(struct cblock *) - CBQSIZE) +#define CROUND (CBLOCK - 1) /* Clist rounding. */ /* * File system parameters and macros. * - * The file system is made out of blocks of at most MAXBSIZE units, with + * The file system is made out of blocks of at most MAXPHYS units, with * smaller units (fragments) only in the last direct block. MAXBSIZE * primarily determines the size of buffers in the buffer pool. It may be - * made larger without any effect on existing file systems; however making - * it smaller make make some file systems unmountable. + * made larger than MAXPHYS without any effect on existing file systems; + * however making it smaller may make some file systems unmountable. + * We set this to track the value of MAX_UPL_TRANSFER_BYTES from + * osfmk/mach/memory_object_types.h to bound it at the maximum UPL size. */ -#define MAXBSIZE MAXPHYS -#define MAXPHYSIO MAXPHYS -#define MAXFRAG 8 +#define MAXBSIZE (256 * 4096) +#define MAXPHYSIO MAXPHYS +#define MAXFRAG 8 + +#define MAXPHYSIO_WIRED (16 * 1024 * 1024) /* * MAXPATHLEN defines the longest permissable path length after expanding @@ -197,29 +203,30 @@ * It should be set high enough to allow all legitimate uses, but halt * infinite loops reasonably quickly. */ -#define MAXPATHLEN PATH_MAX -#define MAXSYMLINKS 32 +#define MAXPATHLEN PATH_MAX +#define MAXSYMLINKS 32 /* Bit map related macros. */ -#define setbit(a,i) (((char *)(a))[(i)/NBBY] |= 1<<((i)%NBBY)) -#define clrbit(a,i) (((char *)(a))[(i)/NBBY] &= ~(1<<((i)%NBBY))) -#define isset(a,i) (((char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) -#define isclr(a,i) ((((char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0) +#define setbit(a, i) (((char *)(a))[(i)/NBBY] |= 1<<((i)%NBBY)) +#define clrbit(a, i) (((char *)(a))[(i)/NBBY] &= ~(1<<((i)%NBBY))) +#define isset(a, i) (((char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) +#define isclr(a, i) ((((char *)(a))[(i)/NBBY] & (1<<((i)%NBBY))) == 0) /* Macros for counting and rounding. */ #ifndef howmany -#define howmany(x, y) (((x)+((y)-1))/(y)) +#define howmany(x, y) ((((x) % (y)) == 0) ? ((x) / (y)) : (((x) / (y)) + 1)) #endif -#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) -#define powerof2(x) ((((x)-1)&(x))==0) +#define roundup(x, y) ((((x) % (y)) == 0) ? \ + (x) : ((x) + ((y) - ((x) % (y))))) +#define powerof2(x) ((((x)-1)&(x))==0) /* Macros for min/max. */ #ifndef MIN -#define MIN(a,b) (((a)<(b))?(a):(b)) +#define MIN(a, b) (((a)<(b))?(a):(b)) #endif /* MIN */ #ifndef MAX -#define MAX(a,b) (((a)>(b))?(a):(b)) -#endif /* MAX */ +#define MAX(a, b) (((a)>(b))?(a):(b)) +#endif /* MAX */ /* * Constants for setting the parameters of the kernel memory allocator. @@ -236,8 +243,8 @@ * Constraints: CLBYTES <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and * MAXALLOCSIZE must be a power of two. */ -#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */ -#define MAXALLOCSAVE (2 * CLBYTES) +#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */ +#define MAXALLOCSAVE (2 * CLBYTES) /* * Scale factor for scaled integers used to count %cpu time and load avgs. @@ -250,7 +257,7 @@ * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age', * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024. */ -#define FSHIFT 11 /* bits to right of fixed binary point */ -#define FSCALE (1<