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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: 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_ */