sl@0: /*-
sl@0:  * Copyright (c) 1990 The Regents of the University of California.
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This code is derived from software contributed to Berkeley by
sl@0:  * William Jolitz.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 4. Neither the name of the University nor the names of its contributors
sl@0:  *    may be used to endorse or promote products derived from this software
sl@0:  *    without specific prior written permission.
sl@0:  *
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  *
sl@0:  *	from: @(#)param.h	5.8 (Berkeley) 6/28/91
sl@0:  * $FreeBSD: src/sys/i386/include/param.h,v 1.79 2004/11/20 02:29:49 das Exp $
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Machine dependent constants for Intel 386.
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Round p (pointer or byte index) up to a correctly-aligned value
sl@0:  * for all data types (int, long, ...).   The result is unsigned int
sl@0:  * and must be cast to any desired pointer type.
sl@0:  */
sl@0: 
sl@0: #ifndef _ALIGNBYTES
sl@0: #define _ALIGNBYTES	(sizeof(int) - 1)
sl@0: #endif
sl@0: #ifndef _ALIGN
sl@0: #define _ALIGN(p)	(((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES)
sl@0: #endif
sl@0: 
sl@0: #ifndef _MACHINE
sl@0: #define	_MACHINE	i386
sl@0: #endif
sl@0: #ifndef _MACHINE_ARCH
sl@0: #define	_MACHINE_ARCH	i386
sl@0: #endif
sl@0: 
sl@0: #ifndef _NO_NAMESPACE_POLLUTION
sl@0: 
sl@0: #ifndef _MACHINE_PARAM_H_
sl@0: #define	_MACHINE_PARAM_H_
sl@0: 
sl@0: #ifndef MACHINE
sl@0: #define MACHINE		"i386"
sl@0: #endif
sl@0: #ifndef MACHINE_ARCH
sl@0: #define	MACHINE_ARCH	"i386"
sl@0: #endif
sl@0: #define MID_MACHINE	MID_I386
sl@0: 
sl@0: #ifdef SMP
sl@0: #define MAXCPU		16
sl@0: #else
sl@0: #define MAXCPU		1
sl@0: #endif /* SMP */
sl@0: 
sl@0: #define ALIGNBYTES	_ALIGNBYTES
sl@0: #define ALIGN(p)	_ALIGN(p)
sl@0: 
sl@0: #define PAGE_SHIFT	12		/* LOG2(PAGE_SIZE) */
sl@0: #define PAGE_SIZE	(1<<PAGE_SHIFT)	/* bytes/page */
sl@0: #define PAGE_MASK	(PAGE_SIZE-1)
sl@0: #define NPTEPG		(PAGE_SIZE/(sizeof (pt_entry_t)))
sl@0: 
sl@0: #ifdef PAE
sl@0: #define NPGPTD		4
sl@0: #define PDRSHIFT	21		/* LOG2(NBPDR) */
sl@0: #else
sl@0: #define NPGPTD		1
sl@0: #define PDRSHIFT	22		/* LOG2(NBPDR) */
sl@0: #endif
sl@0: 
sl@0: #define NBPTD		(NPGPTD<<PAGE_SHIFT)
sl@0: #define NPDEPTD		(NBPTD/(sizeof (pd_entry_t)))
sl@0: #define NPDEPG		(PAGE_SIZE/(sizeof (pd_entry_t)))
sl@0: #define NBPDR		(1<<PDRSHIFT)	/* bytes/page dir */
sl@0: #define PDRMASK		(NBPDR-1)
sl@0: 
sl@0: #define IOPAGES	2		/* pages of i/o permission bitmap */
sl@0: 
sl@0: #ifndef KSTACK_PAGES
sl@0: #define KSTACK_PAGES 2		/* Includes pcb! */
sl@0: #endif
sl@0: #define KSTACK_GUARD_PAGES 1	/* pages of kstack guard; 0 disables */
sl@0: 
sl@0: /*
sl@0:  * Ceiling on amount of swblock kva space, can be changed via
sl@0:  * the kern.maxswzone /boot/loader.conf variable.
sl@0:  */
sl@0: #ifndef VM_SWZONE_SIZE_MAX
sl@0: #define VM_SWZONE_SIZE_MAX	(32 * 1024 * 1024)
sl@0: #endif
sl@0: 
sl@0: /*
sl@0:  * Ceiling on size of buffer cache (really only effects write queueing,
sl@0:  * the VM page cache is not effected), can be changed via
sl@0:  * the kern.maxbcache /boot/loader.conf variable.
sl@0:  */
sl@0: #ifndef VM_BCACHE_SIZE_MAX
sl@0: #define VM_BCACHE_SIZE_MAX	(200 * 1024 * 1024)
sl@0: #endif
sl@0: 
sl@0: /*
sl@0:  * Mach derived conversion macros
sl@0:  */
sl@0: #define trunc_page(x)		((x) & ~PAGE_MASK)
sl@0: #define round_page(x)		(((x) + PAGE_MASK) & ~PAGE_MASK)
sl@0: #define trunc_4mpage(x)		((x) & ~PDRMASK)
sl@0: #define round_4mpage(x)		((((x)) + PDRMASK) & ~PDRMASK)
sl@0: 
sl@0: #define atop(x)			((x) >> PAGE_SHIFT)
sl@0: #define ptoa(x)			((x) << PAGE_SHIFT)
sl@0: 
sl@0: #define i386_btop(x)		((x) >> PAGE_SHIFT)
sl@0: #define i386_ptob(x)		((x) << PAGE_SHIFT)
sl@0: 
sl@0: #define	pgtok(x)		((x) * (PAGE_SIZE / 1024))
sl@0: 
sl@0: #endif /* !_MACHINE_PARAM_H_ */
sl@0: #endif /* !_NO_NAMESPACE_POLLUTION */