newlib/newlib/libc/sys/linux/machine/i386/include/param.h - native_client/nacl-toolchain - Git at Google

 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
  *
  * This code is derived from software contributed to Berkeley by
  * William Jolitz.
  *
  * 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.
  *
  *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
  * $FreeBSD: src/sys/i386/include/param.h,v 1.62 2001/09/12 08:37:33 julian Exp $
  */

 /*
  * Machine dependent constants for Intel 386.
  */

 #ifndef _MACHINE_PARAM_H_
 #define	_MACHINE_PARAM_H_

 #ifndef MACHINE
 #define MACHINE		"i386"
 #endif
 #ifndef MACHINE_ARCH
 #define	MACHINE_ARCH	"i386"
 #endif
 #define MID_MACHINE	MID_I386

 /* Endian-ness */
 #ifndef BIG_ENDIAN
 #define BIG_ENDIAN	4321
 #endif
 #ifndef LITTLE_ENDIAN
 #define LITTLE_ENDIAN	1234
 #endif

 #ifndef BYTE_ORDER
 #define BYTE_ORDER	LITTLE_ENDIAN
 #endif

 /*
  * OBJFORMAT_NAMES is a comma-separated list of the object formats
  * that are supported on the architecture.
  */
 #define OBJFORMAT_NAMES		"elf", "aout"
 #define OBJFORMAT_DEFAULT	"elf"

 #define MAXHOSTNAMELEN 64

 #ifdef SMP
 #define MAXCPU		16
 #else
 #define MAXCPU		1
 #endif /* SMP */

 #define ALIGNBYTES	_ALIGNBYTES
 #define ALIGN(p)	_ALIGN(p)

 #define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))

 #define NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))
 #define PDRSHIFT	22		/* LOG2(NBPDR) */
 #define NBPDR		(1<<PDRSHIFT)	/* bytes/page dir */
 #define PDRMASK		(NBPDR-1)

 #define DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
 #define DEV_BSIZE	(1<<DEV_BSHIFT)

 #ifndef BLKDEV_IOSIZE
 #define BLKDEV_IOSIZE	PAGE_SIZE	/* default block device I/O size */
 #endif
 #define DFLTPHYS	(64 * 1024)	/* default max raw I/O transfer size */
 #define MAXPHYS		(128 * 1024)	/* max raw I/O transfer size */
 #define MAXDUMPPGS	(DFLTPHYS/PAGE_SIZE)

 #define IOPAGES	2		/* pages of i/o permission bitmap */

 #ifndef KSTACK_PAGES
 #define KSTACK_PAGES 2		/* Includes pcb! */
 #endif
 #define UAREA_PAGES 1		/* holds struct user WITHOUT PCB (see def.) */

 #define KSTACK_GUARD		/* compile in the kstack guard page */

 /*
  * Ceiling on amount of swblock kva space.
  */
 #ifndef VM_SWZONE_SIZE_MAX
 #define VM_SWZONE_SIZE_MAX	(70 * 1024 * 1024)
 #endif

 /*
  * Ceiling on size of buffer cache (really only effects write queueing,
  * the VM page cache is not effected).
  */
 #ifndef VM_BCACHE_SIZE_MAX
 #define VM_BCACHE_SIZE_MAX	(200 * 1024 * 1024)
 #endif


 /*
  * Constants related to network buffer management.
  * MCLBYTES must be no larger than PAGE_SIZE.
  */
 #ifndef	MSIZE
 #define MSIZE		256		/* size of an mbuf */
 #endif	/* MSIZE */

 #ifndef	MCLSHIFT
 #define MCLSHIFT	11		/* convert bytes to mbuf clusters */
 #endif	/* MCLSHIFT */
 #define MCLBYTES	(1 << MCLSHIFT)	/* size of an mbuf cluster */

 /*
  * Some macros for units conversion
  */

 /* clicks to bytes */
 #define ctob(x)	((x)<<PAGE_SHIFT)

 /* bytes to clicks */
 #define btoc(x)	(((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT)

 /*
  * btodb() is messy and perhaps slow because `bytes' may be an off_t.  We
  * want to shift an unsigned type to avoid sign extension and we don't
  * want to widen `bytes' unnecessarily.  Assume that the result fits in
  * a daddr_t.
  */
 #define btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
 	(sizeof (bytes) > sizeof(long) \
 	 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
 	 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))

 #define dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
 	((off_t)(db) << DEV_BSHIFT)

 /*
  * Mach derived conversion macros
  */
 #define trunc_page(x)		((x) & ~PAGE_MASK)
 #define round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
 #define trunc_4mpage(x)		((unsigned)(x) & ~PDRMASK)
 #define round_4mpage(x)		((((unsigned)(x)) + PDRMASK) & ~PDRMASK)

 #define atop(x)			((unsigned)(x) >> PAGE_SHIFT)
 #define ptoa(x)			((unsigned)(x) << PAGE_SHIFT)

 #define i386_btop(x)		((unsigned)(x) >> PAGE_SHIFT)
 #define i386_ptob(x)		((unsigned)(x) << PAGE_SHIFT)

 #define	pgtok(x)		((x) * (PAGE_SIZE / 1024))

 #endif /* !_MACHINE_PARAM_H_ */
	/*-
	* Copyright (c) 1990 The Regents of the University of California.
	* All rights reserved.
	*
	* This code is derived from software contributed to Berkeley by
	* William Jolitz.
	*
	* 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.
	*
	* from: @(#)param.h 5.8 (Berkeley) 6/28/91
	* $FreeBSD: src/sys/i386/include/param.h,v 1.62 2001/09/12 08:37:33 julian Exp $
	*/

	/*
	* Machine dependent constants for Intel 386.
	*/

	#ifndef _MACHINE_PARAM_H_
	#define _MACHINE_PARAM_H_

	#ifndef MACHINE
	#define MACHINE "i386"
	#endif
	#ifndef MACHINE_ARCH
	#define MACHINE_ARCH "i386"
	#endif
	#define MID_MACHINE MID_I386

	/* Endian-ness */
	#ifndef BIG_ENDIAN
	#define BIG_ENDIAN 4321
	#endif
	#ifndef LITTLE_ENDIAN
	#define LITTLE_ENDIAN 1234
	#endif

	#ifndef BYTE_ORDER
	#define BYTE_ORDER LITTLE_ENDIAN
	#endif

	/*
	* OBJFORMAT_NAMES is a comma-separated list of the object formats
	* that are supported on the architecture.
	*/
	#define OBJFORMAT_NAMES "elf", "aout"
	#define OBJFORMAT_DEFAULT "elf"

	#define MAXHOSTNAMELEN 64

	#ifdef SMP
	#define MAXCPU 16
	#else
	#define MAXCPU 1
	#endif /* SMP */

	#define ALIGNBYTES _ALIGNBYTES
	#define ALIGN(p) _ALIGN(p)

	#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t)))

	#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t)))
	#define PDRSHIFT 22 /* LOG2(NBPDR) */
	#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */
	#define PDRMASK (NBPDR-1)

	#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
	#define DEV_BSIZE (1<<DEV_BSHIFT)

	#ifndef BLKDEV_IOSIZE
	#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */
	#endif
	#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */
	#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */
	#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE)

	#define IOPAGES 2 /* pages of i/o permission bitmap */

	#ifndef KSTACK_PAGES
	#define KSTACK_PAGES 2 /* Includes pcb! */
	#endif
	#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */

	#define KSTACK_GUARD /* compile in the kstack guard page */

	/*
	* Ceiling on amount of swblock kva space.
	*/
	#ifndef VM_SWZONE_SIZE_MAX
	#define VM_SWZONE_SIZE_MAX (70 * 1024 * 1024)
	#endif

	/*
	* Ceiling on size of buffer cache (really only effects write queueing,
	* the VM page cache is not effected).
	*/
	#ifndef VM_BCACHE_SIZE_MAX
	#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024)
	#endif


	/*
	* Constants related to network buffer management.
	* MCLBYTES must be no larger than PAGE_SIZE.
	*/
	#ifndef MSIZE
	#define MSIZE 256 /* size of an mbuf */
	#endif /* MSIZE */

	#ifndef MCLSHIFT
	#define MCLSHIFT 11 /* convert bytes to mbuf clusters */
	#endif /* MCLSHIFT */
	#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */

	/*
	* Some macros for units conversion
	*/

	/* clicks to bytes */
	#define ctob(x) ((x)<<PAGE_SHIFT)

	/* bytes to clicks */
	#define btoc(x) (((unsigned)(x)+PAGE_MASK)>>PAGE_SHIFT)

	/*
	* btodb() is messy and perhaps slow because `bytes' may be an off_t. We
	* want to shift an unsigned type to avoid sign extension and we don't
	* want to widen `bytes' unnecessarily. Assume that the result fits in
	* a daddr_t.
	*/
	#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
	(sizeof (bytes) > sizeof(long) \
	? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \
	: (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT))

	#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
	((off_t)(db) << DEV_BSHIFT)

	/*
	* Mach derived conversion macros
	*/
	#define trunc_page(x) ((x) & ~PAGE_MASK)
	#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK)
	#define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK)
	#define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK)

	#define atop(x) ((unsigned)(x) >> PAGE_SHIFT)
	#define ptoa(x) ((unsigned)(x) << PAGE_SHIFT)

	#define i386_btop(x) ((unsigned)(x) >> PAGE_SHIFT)
	#define i386_ptob(x) ((unsigned)(x) << PAGE_SHIFT)

	#define pgtok(x) ((x) * (PAGE_SIZE / 1024))

	#endif /* !_MACHINE_PARAM_H_ */