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/*-
* 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
* $FreeBSD$
*/
#ifndef _MACHINE_PARAM_H_
#define _MACHINE_PARAM_H_
/*
* Machine dependent constants for Intel 386.
*/
#define MACHINE "i386"
#define MID_MACHINE MID_I386
/*
* 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.
*/
#define ALIGNBYTES (sizeof(long) - 1)
#define ALIGN(p) (((unsigned long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
/* XXX PGSHIFT and PG_SHIFT are two names for the same thing */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define PAGE_SHIFT 12
#define NBPG (1 << PAGE_SHIFT) /* bytes/page */
#define PAGE_SIZE (1 << PAGE_SHIFT)
#define PAGE_MASK (PAGE_SIZE-1)
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
/* XXX PDRSHIFT and PD_SHIFT are two names for the same thing */
#define PDRSHIFT 22 /* LOG2(NBPDR) */
#define NBPDR (1 << PDRSHIFT) /* bytes/page dir */
#define PDROFSET (NBPDR-1) /* byte offset into page dir */
/*
* XXX This should really be KPTDPTDI << PDRSHIFT, but since KPTDPTDI is
* defined in pmap.h which is included after this we can't do that
* (YET!)
*/
#define BTOPKERNBASE (KERNBASE >> PGSHIFT)
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#define CLSIZELOG2 0
#define CLSIZE (1 << CLSIZELOG2)
/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#define UPAGES 2 /* pages of u-area */
/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than CLBYTES (the software page size), and,
* on machines that exchange pages of input or output buffers with mbuf
* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
* of the hardware page size.
*/
#ifndef MSIZE
#define MSIZE 128 /* size of an mbuf */
#endif /* MSIZE */
#ifndef MCLSHIFT
#define MCLSHIFT 12 /* convert bytes to m_buf clusters */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
#define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
#ifndef NMBCLUSTERS
#ifdef GATEWAY
#define NMBCLUSTERS 512 /* map size, max cluster allocation */
#else
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
#endif /* GATEWAY */
#endif /* NMBCLUSTERS */
/*
* Some macros for units conversion
*/
/* Core clicks (4096 bytes) to segments and vice versa */
#define ctos(x) (x)
#define stoc(x) (x)
/* Core clicks (4096 bytes) to disk blocks */
#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
#define dtob(x) ((x)<<DEV_BSHIFT)
/* clicks to bytes */
#define ctob(x) ((x)<<PGSHIFT)
/* bytes to clicks */
#define btoc(x) (((unsigned long)(x)+(NBPG-1))>>PGSHIFT)
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned long)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned long)(db) << DEV_BSHIFT)
/*
* Map a ``block device block'' to a file system block.
* This should be device dependent, and will be if we
* add an entry to cdevsw/bdevsw for that purpose.
* For now though just use DEV_BSIZE.
*/
#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
/*
* Mach derived conversion macros
*/
#define trunc_page(x) ((unsigned long)(x) & ~(NBPG-1))
#define round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1))
#define atop(x) ((unsigned long)(x) >> PG_SHIFT)
#define ptoa(x) ((unsigned long)(x) << PG_SHIFT)
#define i386_round_pdr(x) ((((unsigned long)(x)) + NBPDR - 1) & ~(NBPDR-1))
#define i386_trunc_pdr(x) ((unsigned long)(x) & ~(NBPDR-1))
#define i386_round_page(x) ((((unsigned long)(x)) + NBPG - 1) & ~(NBPG-1))
#define i386_trunc_page(x) ((unsigned long)(x) & ~(NBPG-1))
#define i386_btod(x) ((unsigned long)(x) >> PDRSHIFT)
#define i386_dtob(x) ((unsigned long)(x) << PDRSHIFT)
#define i386_btop(x) ((unsigned long)(x) >> PGSHIFT)
#define i386_ptob(x) ((unsigned long)(x) << PGSHIFT)
#include "sysparam.h"
#endif /* !_MACHINE_PARAM_H_ */
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