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/* $NetBSD: param.h,v 1.61 2006/08/28 13:43:35 yamt Exp $ */
/*-
* 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. 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.
*
* @(#)param.h 5.8 (Berkeley) 6/28/91
*/
#ifndef _I386_PARAM_H_
#define _I386_PARAM_H_
/*
* Machine dependent constants for Intel 386.
*/
#ifdef _KERNEL
#ifdef _LOCORE
#include <machine/psl.h>
#else
#include <machine/cpu.h>
#endif
#endif
#define _MACHINE i386
#define MACHINE "i386"
#define _MACHINE_ARCH i386
#define MACHINE_ARCH "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 u_int and
* must be cast to any desired pointer type.
*
* ALIGNED_POINTER is a boolean macro that checks whether an address
* is valid to fetch data elements of type t from on this architecture.
* This does not reflect the optimal alignment, just the possibility
* (within reasonable limits).
*
*/
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(u_long)(p) + ALIGNBYTES) &~ \
ALIGNBYTES)
#define ALIGNED_POINTER(p,t) 1
#define PGSHIFT 12 /* LOG2(NBPG) */
#define NBPG (1 << PGSHIFT) /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
#if defined(_KERNEL_OPT)
#include "opt_kernbase.h"
#endif /* defined(_KERNEL_OPT) */
#ifdef KERNBASE_LOCORE
#error "You should only re-define KERNBASE"
#endif
#ifndef KERNBASE
#define KERNBASE 0xc0000000UL /* start of kernel virtual space */
#endif
#define KERNTEXTOFF (KERNBASE + 0x100000) /* start of kernel text */
#define BTOPKERNBASE (KERNBASE >> PGSHIFT)
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE 2048
#ifndef MAXPHYS
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#endif
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#ifdef _KERNEL_OPT
#include "opt_noredzone.h"
#endif
#ifndef UPAGES
#ifdef NOREDZONE
#define UPAGES 2 /* pages of u-area */
#else
#define UPAGES 3
#endif /*NOREDZONE */
#endif /* !defined(UPAGES) */
#define USPACE (UPAGES * NBPG) /* total size of u-area */
#ifndef MSGBUFSIZE
#define MSGBUFSIZE 4*NBPG /* default message buffer size */
#endif
/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than NBPG (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.
*/
#define MSIZE 256 /* size of an mbuf */
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
/* 2K cluster can hold Ether frame */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
#ifndef NMBCLUSTERS
#if defined(_KERNEL_OPT)
#include "opt_gateway.h"
#endif
#ifdef GATEWAY
#define NMBCLUSTERS 2048 /* map size, max cluster allocation */
#else
#define NMBCLUSTERS 1024 /* map size, max cluster allocation */
#endif
#endif
#ifndef NFS_RSIZE
#define NFS_RSIZE 32768
#endif
#ifndef NFS_WSIZE
#define NFS_WSIZE 32768
#endif
/*
* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
* logical pages.
*/
#define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
/*
* Mach derived conversion macros
*/
#define x86_round_pdr(x) ((((unsigned)(x)) + PDOFSET) & ~PDOFSET)
#define x86_trunc_pdr(x) ((unsigned)(x) & ~PDOFSET)
#define x86_btod(x) ((unsigned)(x) >> PDSHIFT)
#define x86_dtob(x) ((unsigned)(x) << PDSHIFT)
#define x86_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
#define x86_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
#define x86_btop(x) ((unsigned)(x) >> PGSHIFT)
#define x86_ptob(x) ((unsigned)(x) << PGSHIFT)
#endif /* _I386_PARAM_H_ */
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