/*-

  * 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.

  * 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 1.79 2004/11/20 02:29:49 das Exp $

  */

 /*

  * Machine dependent constants for Intel 386.

  */

 /*

  * Round p (pointer or byte index) up to a correctly-aligned value

  * for all data types (int, long, ...).   The result is unsigned int

  * and must be cast to any desired pointer type.

  */

 #ifndef _ALIGNBYTES

 #define _ALIGNBYTES	(sizeof(int) - 1)

 #endif

 #ifndef _ALIGN

 #define _ALIGN(p)	(((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)

 #endif

 #ifndef _MACHINE

 #define	_MACHINE	i386

 #endif

 #ifndef _MACHINE_ARCH

 #define	_MACHINE_ARCH	i386

 #endif

 #ifndef _NO_NAMESPACE_POLLUTION

 #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

 #ifdef SMP

 #define MAXCPU		16

 #else

 #define MAXCPU		1

 #endif /* SMP */

 #define ALIGNBYTES	_ALIGNBYTES

 #define ALIGN(p)	_ALIGN(p)

 #define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */

 #define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */

 #define PAGE_MASK	(PAGE_SIZE-1)

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

 #ifdef PAE

 #define NPGPTD		4

 #define PDRSHIFT	21		/* LOG2(NBPDR) */

 #else

 #define NPGPTD		1

 #define PDRSHIFT	22		/* LOG2(NBPDR) */

 #endif

 #define NBPTD		(NPGPTD<<PAGE_SHIFT)

 #define NPDEPTD		(NBPTD/(sizeof (pd_entry_t)))

 #define NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))

 #define NBPDR		(1<<PDRSHIFT)	/* bytes/page dir */

 #define PDRMASK		(NBPDR-1)

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

 #ifndef KSTACK_PAGES

 #define KSTACK_PAGES 2		/* Includes pcb! */

 #endif

 #define KSTACK_GUARD_PAGES 1	/* pages of kstack guard; 0 disables */

 /*

  * Ceiling on amount of swblock kva space, can be changed via

  * the kern.maxswzone /boot/loader.conf variable.

  */

 #ifndef VM_SWZONE_SIZE_MAX

 #define VM_SWZONE_SIZE_MAX	(32 * 1024 * 1024)

 #endif

 /*

  * Ceiling on size of buffer cache (really only effects write queueing,

  * the VM page cache is not effected), can be changed via

  * the kern.maxbcache /boot/loader.conf variable.

  */

 #ifndef VM_BCACHE_SIZE_MAX

 #define VM_BCACHE_SIZE_MAX	(200 * 1024 * 1024)

 #endif

 /*

  * Mach derived conversion macros

  */

 #define trunc_page(x)		((x) & ~PAGE_MASK)

 #define round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)

 #define trunc_4mpage(x)		((x) & ~PDRMASK)

 #define round_4mpage(x)		((((x)) + PDRMASK) & ~PDRMASK)

 #define atop(x)			((x) >> PAGE_SHIFT)

 #define ptoa(x)			((x) << PAGE_SHIFT)

 #define i386_btop(x)		((x) >> PAGE_SHIFT)

 #define i386_ptob(x)		((x) << PAGE_SHIFT)

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

 #endif /* !_MACHINE_PARAM_H_ */

 #endif /* !_NO_NAMESPACE_POLLUTION */