/*-

 * 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 */