[dragonfly.git] / sys / sys / param.h

/*-
 * Copyright (c) 1982, 1986, 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)param.h	8.3 (Berkeley) 4/4/95
 * $FreeBSD: src/sys/sys/param.h,v 1.61.2.38 2003/05/22 17:12:01 fjoe Exp $
 */

#ifndef _SYS_PARAM_H_
#define _SYS_PARAM_H_

#define BSD	200708		/* XXX kern.osrevision */
#define BSD4_3	1		/* XXX obsolete */
#define BSD4_4	1		/* XXX obsolete */

/*
 * __DragonFly_version number.  The number doesn't really meaningfully
 * translate to a version number.
 *
 * 170000 - base development version after 1.6 branch
 * 170001 - base development version before 1.8 branch
 * 190000 - base development version after 1.8 branch
 * 195000 - base development version after 1.10 branch
 * 197500 - base development version before 1.12 branch
 * 197600 - 1.12 branch
 * 197700 - base development version after 1.12 branch
 * 199900 - base development version before 2.0 branch
 * 200000 - 2.0 branch
 * 200100 - base development version after 2.0 branch
 * 200101 - lchflags syscall
 * 200200 - 2.2 branch
 * 200201 - base development version after 2.2 branch
 * 200202 - major changes to libc
 * 200203 - introduce PCI domain
 * 200204 - suser() & suser_cred() removal
 * 200205 - devfs import
 * 200206 - *sleep() renames
 * 200400 - 2.4 release
 * 200500 - 2.5 master
 * 200600 - 2.6 release
 * 200700 - 2.7 master
 * 200800 - 2.8 release			October 2010
 * 200900 - 2.9 master
 * 200901 - prototype changes for alphasort(3) and scandir(3)
 * 200902 - Xerox NS protocol removal
 * 201000 - 2.10 release
 * 201100 - 2.11 master
 * 201200 - 2.12 release
 * 201300 - 2.13 master
 * 201301 - header rename: <vfs/gnu/ext2fs/...> -> <gnu/vfs/ext2fs/...>
 * 201302 - header <crypt.h> is gone
 * 201303 - <netatalk/...> and <netproto/atalk/...> are gone
 * 201304 - Added wcscasecmp, wcsncasecmp to libc
 * 201305 - Sync libm with NetBSD-current libm (new functions added)
 * 201306 - Sync libm with FreeBSD-current libm (~50 new functions)
 * 300000 - 3.0 release
 * 300100 - 3.1 master
 * 300101 - i4b (ISDN) removal
 * 300102 - <sys/ata.h> is now just a link of <sys/nata.h>
 * 300103 - if SIG_IGN is set on SIGCHLD, do not keep zombie children
 * 300003 - bugfix release
 */
#undef __DragonFly_version
#define __DragonFly_version 300003	/* propagated to newvers */

#include <sys/_null.h>

#ifndef LOCORE
#include <sys/types.h>
#endif

/*
 * Machine-independent constants (some used in following include files).
 * Redefined constants are from POSIX 1003.1 limits file.
 *
 * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
 * MAXLOGNAME should be == UT_NAMESIZE+1 (see <utmp.h>)
 */
#include <sys/syslimits.h>

#define MAXCOMLEN	16		/* max command name remembered */
#define MAXINTERP	32		/* max interpreter file name length */
#define MAXLOGNAME	17		/* max login name length (incl. NUL) */
#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		OPEN_MAX	/* max open files per process */
#define NOGROUP		65535		/* marker for empty group set member */
#define MAXHOSTNAMELEN	256		/* max hostname size */

/* More types and definitions used throughout the kernel. */
#ifdef _KERNEL
#include <sys/cdefs.h>
#include <sys/errno.h>
#include <sys/time.h>

#define FALSE	0
#define TRUE	1
#endif

#ifndef _KERNEL
/* Signals. */
#include <sys/select.h>
#include <sys/signal.h>
#endif

/* Machine type dependent parameters. */
#include <machine/param.h>
#ifndef _KERNEL
#include <machine/limits.h>
#endif

#define PCATCH		0x00000100	/* tsleep checks signals */
#define PUSRFLAG1	0x00000200	/* Subsystem specific flag */
#define PINTERLOCKED	0x00000400	/* Interlocked tsleep */
#define PWAKEUP_CPUMASK	0x00003FFF	/* start cpu for chained wakeups */
#define PWAKEUP_MYCPU	0x00004000	/* wakeup on current cpu only */
#define PWAKEUP_ONE	0x00008000	/* argument to wakeup: only one */
#define PDOMAIN_MASK	0xFFFF0000	/* address domains for wakeup */
#define PDOMAIN_UMTX	0x00010000	/* independant domain for UMTX */
#define PDOMAIN_XLOCK	0x00020000	/* independant domain for fifo_lock */
#define PWAKEUP_ENCODE(domain, cpu)	((domain) | (cpu))
#define PWAKEUP_DECODE(domain)		((domain) & PWAKEUP_CPUMASK)

#define NZERO	0		/* default "nice" */

#define NBPW	sizeof(int)	/* number of bytes per word (integer) */

#define CMASK	022		/* default file mask: S_IWGRP|S_IWOTH */
#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
#define NOUDEV	(udev_t)(-1)	/* non-existent device */
#define NOMAJ	256		/* non-existent device */
#endif

#ifndef _KERNEL
#define NODEV	(dev_t)(-1)	/* non-existent device */
#endif

/*
 * cpu_mi_feature bits
 */
#define CPU_MI_BZERONT	0x00000001
#define CPU_MI_MONITOR	0x00000010

/*
 * File system parameters and macros.
 *
 * MAXBSIZE -	Filesystems are made out of blocks of at most MAXBSIZE bytes
 *		per block.  MAXBSIZE may be made larger without effecting
 *		any existing filesystems as long as it does not exceed MAXPHYS,
 *		and may be made smaller at the risk of not being able to use
 *		filesystems which require a block size exceeding MAXBSIZE.
 *
 * BKVASIZE -	Nominal buffer space per buffer, in bytes.  BKVASIZE is the
 *		minimum KVM memory reservation the kernel is willing to make.
 *		Filesystems can of course request smaller chunks.  Actual 
 *		backing memory uses a chunk size of a page (PAGE_SIZE).
 *
 *		If you make BKVASIZE too small you risk seriously fragmenting
 *		the buffer KVM map which may slow things down a bit.  If you
 *		make it too big the kernel will not be able to optimally use 
 *		the KVM memory reserved for the buffer cache and will wind 
 *		up with too-few buffers.
 *
 *		The default is 16384, roughly 2x the block size used by a
 *		normal UFS filesystem.
 */
#define MAXBSIZE	65536	/* must be power of 2 */
#define BKVASIZE	16384	/* must be power of 2 */
#define BKVAMASK	(BKVASIZE-1)
#define MAXFRAG 	8

/*
 * MAXPATHLEN defines the longest permissible path length after expanding
 * symbolic links. It is used to allocate a temporary buffer from the buffer
 * pool in which to do the name expansion, hence should be a power of two,
 * and must be less than or equal to MAXBSIZE.  MAXSYMLINKS defines the
 * maximum number of symbolic links that may be expanded in a path name.
 * It should be set high enough to allow all legitimate uses, but halt
 * infinite loops reasonably quickly.
 */
#define MAXPATHLEN	PATH_MAX
#define MAXSYMLINKS	32

/* Bit map related macros. */
#define setbit(a,i)	((a)[(i)/NBBY] |= 1<<((i)%NBBY))
#define clrbit(a,i)	((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
#define isset(a,i)	((a)[(i)/NBBY] & (1<<((i)%NBBY)))
#define isclr(a,i)	(((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)

/* Macros for counting and rounding. */
#ifndef howmany
#define howmany(x, y)	(((x)+((y)-1))/(y))
#endif
#define rounddown(x, y)	(((x)/(y))*(y))
#define rounddown2(x, y) ((x) & ~((y) - 1))	   /* y power of two */
#define roundup(x, y)	((((x)+((y)-1))/(y))*(y))  /* to any y */
#define roundup2(x, y)	(((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
#define powerof2(x)	((((x)-1)&(x))==0)

/*
 * VM objects can be larger than the virtual address space, make sure
 * we don't cut-off the mask.
 */
#define trunc_page64(x)           ((x) & ~(int64_t)PAGE_MASK)
#define round_page64(x)           (((x) + PAGE_MASK) & ~(int64_t)PAGE_MASK)

/* Macros for min/max. */
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))

/* Macro for array size */
#define NELEM(ary) 	(sizeof(ary) / sizeof((ary)[0]))

/*
 * Constants for setting the parameters of the kernel memory allocator.
 *
 * 2 ** MINBUCKET is the smallest unit of memory that will be
 * allocated. It must be at least large enough to hold a pointer.
 *
 * Units of memory less or equal to MAXALLOCSAVE will permanently
 * allocate physical memory; requests for these size pieces of
 * memory are quite fast. Allocations greater than MAXALLOCSAVE must
 * always allocate and free physical memory; requests for these
 * size allocations should be done infrequently as they will be slow.
 *
 * Constraints: PAGE_SIZE <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
 * MAXALLOCSIZE must be a power of two.
 */
#define MINBUCKET	4		/* 4 => min allocation of 16 bytes */
#define MAXALLOCSAVE	(2 * PAGE_SIZE)

/*
 * Scale factor for scaled integers used to count %cpu time and load avgs.
 *
 * The number of CPU `tick's that map to a unique `%age' can be expressed
 * by the formula (1 / (2 ^ (FSHIFT - 11))).  The maximum load average that
 * can be calculated (assuming 32 bits) can be closely approximated using
 * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
 *
 * 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<<FSHIFT)

#define dbtoc(db)			/* calculates devblks to pages */ \
	((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT))
 
#define ctodb(db)			/* calculates pages to devblks */ \
	((db) << (PAGE_SHIFT - DEV_BSHIFT))

#define MJUMPAGESIZE	PAGE_SIZE	/* jumbo cluster 4k */
#define MJUM9BYTES	(9 * 1024)	/* jumbo cluster 9k */
#define MJUM16BYTES	(16 * 1024)	/* jumbo cluster 16k */

/*
 * MBUF Management.
 *
 * Because many drivers can't deal with multiple DMA segments all mbufs
 * must avoid crossing a page boundary.  While we can accomodate mbufs
 * which are not a power-of-2 sized kmalloc() will only guarantee
 * non-crossing alignment if we use a power-of-2.  256 is no longer large
 * enough due to m_hdr and m_pkthdr bloat.
 *
 * MCLBYTES must be a power of 2 and is typically significantly larger
 * than MSIZE, sufficient to hold a standard-mtu packet.  2K is considered
 * reasonable.
 */
#ifndef MSIZE
#define MSIZE		512		/* size of an mbuf */
#endif

#ifndef MCLSHIFT
#define MCLSHIFT        11              /* convert bytes to m_buf clusters */
#endif
#define MCLBYTES        (1 << MCLSHIFT) /* size of an m_buf cluster */
#define MCLOFSET        (MCLBYTES - 1)  /* offset within an m_buf cluster */

/*
 * Make this available for most of the kernel.  There were too many
 * things that included sys/systm.h just for panic().
 */
#ifdef _KERNEL
void	panic (const char *, ...) __dead2 __printflike(1, 2);
#endif

#ifndef htonl
#define	htonl(x)	__htonl(x)
#endif
#ifndef htons
#define	htons(x)	__htons(x)
#endif
#ifndef ntohl
#define	ntohl(x)	__ntohl(x)
#endif
#ifndef ntohs
#define	ntohs(x)	__ntohs(x)
#endif

#endif	/* _SYS_PARAM_H_ */
Commit	Line	Data
984263bc MD	1	/*-
	2	* Copyright (c) 1982, 1986, 1989, 1993
	3	* The Regents of the University of California. All rights reserved.
	4	* (c) UNIX System Laboratories, Inc.
	5	* All or some portions of this file are derived from material licensed
	6	* to the University of California by American Telephone and Telegraph
	7	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	8	* the permission of UNIX System Laboratories, Inc.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. All advertising materials mentioning features or use of this software
	19	* must display the following acknowledgement:
	20	* This product includes software developed by the University of
	21	* California, Berkeley and its contributors.
	22	* 4. Neither the name of the University nor the names of its contributors
	23	* may be used to endorse or promote products derived from this software
	24	* without specific prior written permission.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	36	* SUCH DAMAGE.
	37	*
	38	* @(#)param.h 8.3 (Berkeley) 4/4/95
	39	* $FreeBSD: src/sys/sys/param.h,v 1.61.2.38 2003/05/22 17:12:01 fjoe Exp $
	40	*/
	41
	42	#ifndef _SYS_PARAM_H_
	43	#define _SYS_PARAM_H_
	44
f0ae1834	45	#define BSD 200708 /* XXX kern.osrevision */
d77e8324 MD	46	#define BSD4_3 1 /* XXX obsolete */
d77e8324 MD	47	#define BSD4_4 1 /* XXX obsolete */
984263bc	48
d77e8324	49	/*
eab38af1 MD	50	* __DragonFly_version number. The number doesn't really meaningfully
eab38af1 MD	51	* translate to a version number.
9ba76b73	52	*
02d4667d	53	* 170000 - base development version after 1.6 branch
aefcf6d5	54	* 170001 - base development version before 1.8 branch
677f984f	55	* 190000 - base development version after 1.8 branch
3ae3ada0	56	* 195000 - base development version after 1.10 branch
eab38af1	57	* 197500 - base development version before 1.12 branch
0cf13ba1 MD	58	* 197600 - 1.12 branch
0cf13ba1 MD	59	* 197700 - base development version after 1.12 branch
ce9d787d MD	60	* 199900 - base development version before 2.0 branch
ce9d787d MD	61	* 200000 - 2.0 branch
3b7b6af7	62	* 200100 - base development version after 2.0 branch
91fdc001	63	* 200101 - lchflags syscall
d8e83bc2 MD	64	* 200200 - 2.2 branch
d8e83bc2 MD	65	* 200201 - base development version after 2.2 branch
64cc0b46	66	* 200202 - major changes to libc
b8f055be	67	* 200203 - introduce PCI domain
809dc6e6	68	* 200204 - suser() & suser_cred() removal
e12edcbc	69	* 200205 - devfs import
f464e11c	70	* 200206 - *sleep() renames
68dc98df	71	* 200400 - 2.4 release
7317bb64	72	* 200500 - 2.5 master
68dc98df	73	* 200600 - 2.6 release
40eb8ea1	74	* 200700 - 2.7 master
68dc98df MD	75	* 200800 - 2.8 release October 2010
68dc98df MD	76	* 200900 - 2.9 master
55cc754d	77	* 200901 - prototype changes for alphasort(3) and scandir(3)
62b5ec1d	78	* 200902 - Xerox NS protocol removal
8b70659c MD	79	* 201000 - 2.10 release
8b70659c MD	80	* 201100 - 2.11 master
693b2d64 JS	81	* 201200 - 2.12 release
693b2d64 JS	82	* 201300 - 2.13 master
b993bb87	83	* 201301 - header rename: <vfs/gnu/ext2fs/...> -> <gnu/vfs/ext2fs/...>
e96bff60	84	* 201302 - header <crypt.h> is gone
d22a69a4	85	* 201303 - <netatalk/...> and <netproto/atalk/...> are gone
7c426b5f	86	* 201304 - Added wcscasecmp, wcsncasecmp to libc
373b1e4d	87	* 201305 - Sync libm with NetBSD-current libm (new functions added)
ae23f131	88	* 201306 - Sync libm with FreeBSD-current libm (~50 new functions)
e6e83d07 JS	89	* 300000 - 3.0 release
e6e83d07 JS	90	* 300100 - 3.1 master
b8aacf5e MR	91	* 300101 - i4b (ISDN) removal
	92	* 300102 - <sys/ata.h> is now just a link of <sys/nata.h>
	93	* 300103 - if SIG_IGN is set on SIGCHLD, do not keep zombie children
2c987160	94	* 300003 - bugfix release
984263bc	95	*/
e9ddd87b	96	#undef __DragonFly_version
2c987160	97	#define __DragonFly_version 300003 /* propagated to newvers */
d77e8324	98
e4dcda4d	99	#include <sys/_null.h>
984263bc MD	100
	101	#ifndef LOCORE
	102	#include <sys/types.h>
	103	#endif
	104
	105	/*
	106	* Machine-independent constants (some used in following include files).
	107	* Redefined constants are from POSIX 1003.1 limits file.
	108	*
	109	* MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
	110	* MAXLOGNAME should be == UT_NAMESIZE+1 (see <utmp.h>)
	111	*/
	112	#include <sys/syslimits.h>
	113
6bb39c45 DR	114	#define MAXCOMLEN 16 /* max command name remembered */
	115	#define MAXINTERP 32 /* max interpreter file name length */
	116	#define MAXLOGNAME 17 /* max login name length (incl. NUL) */
	117	#define MAXUPRC CHILD_MAX /* max simultaneous processes */
	118	#define NCARGS ARG_MAX /* max bytes for an exec function */
	119	#define NGROUPS NGROUPS_MAX /* max number groups */
	120	#define NOFILE OPEN_MAX /* max open files per process */
	121	#define NOGROUP 65535 /* marker for empty group set member */
984263bc MD	122	#define MAXHOSTNAMELEN 256 /* max hostname size */
	123
	124	/* More types and definitions used throughout the kernel. */
	125	#ifdef _KERNEL
	126	#include <sys/cdefs.h>
	127	#include <sys/errno.h>
	128	#include <sys/time.h>
	129
6bb39c45 DR	130	#define FALSE 0
6bb39c45 DR	131	#define TRUE 1
984263bc MD	132	#endif
	133
	134	#ifndef _KERNEL
	135	/* Signals. */
805f91d4	136	#include <sys/select.h>
984263bc MD	137	#include <sys/signal.h>
	138	#endif
	139
	140	/* Machine type dependent parameters. */
	141	#include <machine/param.h>
	142	#ifndef _KERNEL
	143	#include <machine/limits.h>
	144	#endif
	145
da5fb9ef MD	146	#define PCATCH 0x00000100 /* tsleep checks signals */
da5fb9ef MD	147	#define PUSRFLAG1 0x00000200 /* Subsystem specific flag */
d9345d3a	148	#define PINTERLOCKED 0x00000400 /* Interlocked tsleep */
b336a9b1 MD	149	#define PWAKEUP_CPUMASK 0x00003FFF /* start cpu for chained wakeups */
b336a9b1 MD	150	#define PWAKEUP_MYCPU 0x00004000 /* wakeup on current cpu only */
fc17ad60	151	#define PWAKEUP_ONE 0x00008000 /* argument to wakeup: only one */
da5fb9ef MD	152	#define PDOMAIN_MASK 0xFFFF0000 /* address domains for wakeup */
da5fb9ef MD	153	#define PDOMAIN_UMTX 0x00010000 /* independant domain for UMTX */
b12defdc	154	#define PDOMAIN_XLOCK 0x00020000 /* independant domain for fifo_lock */
fc17ad60 MD	155	#define PWAKEUP_ENCODE(domain, cpu) ((domain) \| (cpu))
fc17ad60 MD	156	#define PWAKEUP_DECODE(domain) ((domain) & PWAKEUP_CPUMASK)
984263bc	157
6bb39c45	158	#define NZERO 0 /* default "nice" */
984263bc	159
6bb39c45	160	#define NBPW sizeof(int) /* number of bytes per word (integer) */
984263bc	161
6bb39c45	162	#define CMASK 022 /* default file mask: S_IWGRP\|S_IWOTH */
b13267a5	163	#if defined(_KERNEL) \|\| defined(_KERNEL_STRUCTURES)
6bb39c45 DR	164	#define NOUDEV (udev_t)(-1) /* non-existent device */
6bb39c45 DR	165	#define NOMAJ 256 /* non-existent device */
b13267a5 MD	166	#endif
	167
	168	#ifndef _KERNEL
6bb39c45	169	#define NODEV (dev_t)(-1) /* non-existent device */
984263bc MD	170	#endif
	171
	172	/*
d87e79b9 MD	173	* cpu_mi_feature bits
	174	*/
	175	#define CPU_MI_BZERONT 0x00000001
2a06bc07	176	#define CPU_MI_MONITOR 0x00000010
d87e79b9 MD	177
d87e79b9 MD	178	/*
984263bc MD	179	* File system parameters and macros.
	180	*
	181	* MAXBSIZE - Filesystems are made out of blocks of at most MAXBSIZE bytes
	182	* per block. MAXBSIZE may be made larger without effecting
	183	* any existing filesystems as long as it does not exceed MAXPHYS,
	184	* and may be made smaller at the risk of not being able to use
	185	* filesystems which require a block size exceeding MAXBSIZE.
	186	*
	187	* BKVASIZE - Nominal buffer space per buffer, in bytes. BKVASIZE is the
	188	* minimum KVM memory reservation the kernel is willing to make.
	189	* Filesystems can of course request smaller chunks. Actual
	190	* backing memory uses a chunk size of a page (PAGE_SIZE).
	191	*
	192	* If you make BKVASIZE too small you risk seriously fragmenting
	193	* the buffer KVM map which may slow things down a bit. If you
	194	* make it too big the kernel will not be able to optimally use
	195	* the KVM memory reserved for the buffer cache and will wind
	196	* up with too-few buffers.
	197	*
	198	* The default is 16384, roughly 2x the block size used by a
	199	* normal UFS filesystem.
	200	*/
	201	#define MAXBSIZE 65536 /* must be power of 2 */
	202	#define BKVASIZE 16384 /* must be power of 2 */
	203	#define BKVAMASK (BKVASIZE-1)
	204	#define MAXFRAG 8
	205
	206	/*
	207	* MAXPATHLEN defines the longest permissible path length after expanding
	208	* symbolic links. It is used to allocate a temporary buffer from the buffer
	209	* pool in which to do the name expansion, hence should be a power of two,
	210	* and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
	211	* maximum number of symbolic links that may be expanded in a path name.
	212	* It should be set high enough to allow all legitimate uses, but halt
	213	* infinite loops reasonably quickly.
	214	*/
6bb39c45	215	#define MAXPATHLEN PATH_MAX
984263bc MD	216	#define MAXSYMLINKS 32
	217
	218	/* Bit map related macros. */
6bb39c45 DR	219	#define setbit(a,i) ((a)[(i)/NBBY] \|= 1<<((i)%NBBY))
	220	#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
	221	#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
	222	#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
984263bc MD	223
	224	/* Macros for counting and rounding. */
	225	#ifndef howmany
6bb39c45	226	#define howmany(x, y) (((x)+((y)-1))/(y))
984263bc	227	#endif
6bb39c45	228	#define rounddown(x, y) (((x)/(y))*(y))
a8cf2878	229	#define rounddown2(x, y) ((x) & ~((y) - 1)) /* y power of two */
6bb39c45 DR	230	#define roundup(x, y) ((((x)+((y)-1))/(y))(y)) / to any y */
6bb39c45 DR	231	#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
984263bc MD	232	#define powerof2(x) ((((x)-1)&(x))==0)
984263bc MD	233
aecf2182 MD	234	/*
	235	* VM objects can be larger than the virtual address space, make sure
	236	* we don't cut-off the mask.
	237	*/
	238	#define trunc_page64(x) ((x) & ~(int64_t)PAGE_MASK)
	239	#define round_page64(x) (((x) + PAGE_MASK) & ~(int64_t)PAGE_MASK)
	240
984263bc	241	/* Macros for min/max. */
6bb39c45 DR	242	#define MIN(a,b) (((a)<(b))?(a):(b))
6bb39c45 DR	243	#define MAX(a,b) (((a)>(b))?(a):(b))
984263bc	244
a3034532	245	/* Macro for array size */
fa8f7852	246	#define NELEM(ary) (sizeof(ary) / sizeof((ary)[0]))
a3034532	247
984263bc MD	248	/*
	249	* Constants for setting the parameters of the kernel memory allocator.
	250	*
	251	* 2 ** MINBUCKET is the smallest unit of memory that will be
	252	* allocated. It must be at least large enough to hold a pointer.
	253	*
	254	* Units of memory less or equal to MAXALLOCSAVE will permanently
	255	* allocate physical memory; requests for these size pieces of
	256	* memory are quite fast. Allocations greater than MAXALLOCSAVE must
	257	* always allocate and free physical memory; requests for these
	258	* size allocations should be done infrequently as they will be slow.
	259	*
	260	* Constraints: PAGE_SIZE <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
	261	* MAXALLOCSIZE must be a power of two.
	262	*/
984263bc	263	#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */
984263bc MD	264	#define MAXALLOCSAVE (2 * PAGE_SIZE)
	265
	266	/*
	267	* Scale factor for scaled integers used to count %cpu time and load avgs.
	268	*
	269	* The number of CPU `tick's that map to a unique `%age' can be expressed
	270	* by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
	271	* can be calculated (assuming 32 bits) can be closely approximated using
	272	* the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
	273	*
	274	* For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
	275	* FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
	276	*/
6bb39c45	277	#define FSHIFT 11 /* bits to right of fixed binary point */
984263bc MD	278	#define FSCALE (1<<FSHIFT)
	279
	280	#define dbtoc(db) /* calculates devblks to pages */ \
	281	((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT))
	282
	283	#define ctodb(db) /* calculates pages to devblks */ \
	284	((db) << (PAGE_SHIFT - DEV_BSHIFT))
	285
26a135b9 AE	286	#define MJUMPAGESIZE PAGE_SIZE /* jumbo cluster 4k */
	287	#define MJUM9BYTES (9 * 1024) /* jumbo cluster 9k */
	288	#define MJUM16BYTES (16 * 1024) /* jumbo cluster 16k */
ff9e829d MD	289
	290	/*
	291	* MBUF Management.
	292	*
ee9d7228 MD	293	* Because many drivers can't deal with multiple DMA segments all mbufs
	294	* must avoid crossing a page boundary. While we can accomodate mbufs
	295	* which are not a power-of-2 sized kmalloc() will only guarantee
	296	* non-crossing alignment if we use a power-of-2. 256 is no longer large
	297	* enough due to m_hdr and m_pkthdr bloat.
ff9e829d MD	298	*
	299	* MCLBYTES must be a power of 2 and is typically significantly larger
	300	* than MSIZE, sufficient to hold a standard-mtu packet. 2K is considered
	301	* reasonable.
	302	*/
	303	#ifndef MSIZE
ee9d7228	304	#define MSIZE 512 /* size of an mbuf */
ff9e829d MD	305	#endif
	306
	307	#ifndef MCLSHIFT
94eaee9a	308	#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
ff9e829d MD	309	#endif
	310	#define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
	311	#define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
	312
984263bc MD	313	/*
	314	* Make this available for most of the kernel. There were too many
	315	* things that included sys/systm.h just for panic().
	316	*/
	317	#ifdef _KERNEL
b153f746	318	void panic (const char *, ...) __dead2 __printflike(1, 2);
984263bc MD	319	#endif
984263bc MD	320
465a99ae JS	321	#ifndef htonl
	322	#define htonl(x) __htonl(x)
	323	#endif
	324	#ifndef htons
	325	#define htons(x) __htons(x)
	326	#endif
	327	#ifndef ntohl
	328	#define ntohl(x) __ntohl(x)
	329	#endif
	330	#ifndef ntohs
	331	#define ntohs(x) __ntohs(x)
	332	#endif
	333
984263bc	334	#endif /* _SYS_PARAM_H_ */