164 lines
5.1 KiB
C
164 lines
5.1 KiB
C
/* $NetBSD: param.h,v 1.77 2012/04/20 22:23:24 rmind Exp $ */
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.h 5.8 (Berkeley) 6/28/91
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*/
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#ifndef _I386_PARAM_H_
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#define _I386_PARAM_H_
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/*
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* Machine dependent constants for Intel 386.
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*/
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/*
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* MAXCPUS must be defined before cpu.h inclusion. Note: i386 might
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* support more CPUs, but due to the limited KVA space available on
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* i386, such support would be inefficient. Use amd64 instead.
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*/
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#define MAXCPUS 32
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#ifdef _KERNEL
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#include <machine/cpu.h>
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#endif
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#define _MACHINE i386
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#define MACHINE "i386"
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#define _MACHINE_ARCH i386
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#define MACHINE_ARCH "i386"
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#define MID_MACHINE MID_I386
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#define ALIGNED_POINTER(p,t) 1
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#define PGSHIFT 12 /* LOG2(NBPG) */
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#define NBPG (1 << PGSHIFT) /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
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#if defined(_KERNEL_OPT)
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#include "opt_kernbase.h"
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#endif /* defined(_KERNEL_OPT) */
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#ifdef KERNBASE_LOCORE
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#error "You should only re-define KERNBASE"
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#endif
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#ifndef KERNBASE
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#define KERNBASE 0xc0000000UL /* start of kernel virtual space */
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#endif
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#define KERNTEXTOFF (KERNBASE + 0x100000) /* start of kernel text */
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#define BTOPKERNBASE (KERNBASE >> PGSHIFT)
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define DEV_BSIZE (1 << DEV_BSHIFT)
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#define BLKDEV_IOSIZE 2048
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#ifndef MAXPHYS
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#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
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#endif
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#define SSIZE 1 /* initial stack size/NBPG */
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#define SINCR 1 /* increment of stack/NBPG */
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#ifndef UPAGES
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# ifdef DIAGNOSTIC
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# define UPAGES 3 /* 2 + 1 page for redzone */
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# else
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# define UPAGES 2 /* normal pages of u-area */
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# endif /* DIAGNOSTIC */
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#endif /* !defined(UPAGES) */
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#define USPACE (UPAGES * NBPG) /* total size of u-area */
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#define INTRSTACKSIZE 8192
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#ifndef MSGBUFSIZE
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#define MSGBUFSIZE 8*NBPG /* default message buffer size */
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#endif
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/*
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* Constants related to network buffer management.
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* MCLBYTES must be no larger than NBPG (the software page size), and,
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* on machines that exchange pages of input or output buffers with mbuf
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* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
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* of the hardware page size.
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*/
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#define MSIZE 256 /* size of an mbuf */
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#ifndef MCLSHIFT
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#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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/* 2K cluster can hold Ether frame */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
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#ifndef NMBCLUSTERS_MAX
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#define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */
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#endif
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#ifndef NFS_RSIZE
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#define NFS_RSIZE 32768
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#endif
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#ifndef NFS_WSIZE
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#define NFS_WSIZE 32768
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#endif
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/*
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* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
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* logical pages.
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*/
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#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((360 * 1024 * 1024) >> PAGE_SHIFT)
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/*
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* Mach derived conversion macros
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*/
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#define x86_round_pdr(x) \
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((((unsigned long)(x)) + (NBPD_L2 - 1)) & ~(NBPD_L2 - 1))
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#define x86_trunc_pdr(x) ((unsigned long)(x) & ~(NBPD_L2 - 1))
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#define x86_btod(x) ((unsigned long)(x) >> L2_SHIFT)
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#define x86_dtob(x) ((unsigned long)(x) << L2_SHIFT)
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#define x86_round_page(x) ((((paddr_t)(x)) + PGOFSET) & ~PGOFSET)
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#define x86_trunc_page(x) ((paddr_t)(x) & ~PGOFSET)
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#define x86_btop(x) ((paddr_t)(x) >> PGSHIFT)
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#define x86_ptob(x) ((paddr_t)(x) << PGSHIFT)
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#ifdef __minix
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/* Minix expect to find in this file PAGE_* defines. */
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#include <machine/vmparam.h>
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#define trunc_page(x) x86_trunc_page(x)
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#define round_page(x) x86_round_page(x)
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#endif
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#endif /* _I386_PARAM_H_ */
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