174 lines
5.6 KiB
C
174 lines
5.6 KiB
C
/* $NetBSD: param.h,v 1.2 2003/09/03 19:35:02 ragge 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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 _PDP10_PARAM_H_
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#define _PDP10_PARAM_H_
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/*
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* Machine dependent constants for PDP10.
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*/
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#define _MACHINE pdp10
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#define MACHINE "pdp10"
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#define _MACHINE_ARCH pdp10
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#define MACHINE_ARCH "pdp10"
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#define MID_MACHINE MID_PDP10
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value
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* for all data types (int, long, ...). The result is u_int and
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* must be cast to any desired pointer type.
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*
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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*
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*/
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/* XXX - how should this macro look like??? */
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#define ALIGNBYTES (sizeof(int) - 1)
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#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
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#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
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#define PGSHIFT 11 /* LOG2(NBPG) */
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#define NBPG (1 << PGSHIFT) /* (1 << PGSHIFT) bytes/page */
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#define PGOFSET (NBPG - 1) /* byte offset into page */
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#define KERNBASE 01000000 /* start of kernel virtual */
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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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#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
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#define MAXBSIZE 0x4000 /* max FS block size - XXX */
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#define UPAGES 2 /* pages of u-area */
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#define USPACE (NBPG*UPAGES)
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#ifndef MSGBUFSIZE
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#define MSGBUFSIZE NBPG /* default message buffer size */
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#endif
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/*
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* KVA is very tight on pdp10, reduce the amount of KVA used by pipe
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* "direct" write code to reasonably low value.
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*/
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#ifndef PIPE_DIRECT_CHUNK
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#define PIPE_DIRECT_CHUNK 65536
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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
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#if defined(_KERNEL_OPT)
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#include "opt_gateway.h"
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#endif
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#ifdef GATEWAY
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#define NMBCLUSTERS 512 /* map size, max cluster allocation */
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#else
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#define NMBCLUSTERS 256 /* map size, max cluster allocation */
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#endif
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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 ((4 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
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#define PAGER_MAP_SIZE (4 * 1024 * 1024)
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/*
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* Some macros for units conversion
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*/
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/* pages ("clicks") to disk blocks */
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#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
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#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
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/* clicks to bytes */
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#define ctob(x) ((x) << PGSHIFT)
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#define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT)
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#define btop(x) (((unsigned)(x)) >> PGSHIFT)
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/* bytes to disk blocks */
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#define btodb(x) ((unsigned long)(x) >> DEV_BSHIFT)
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#define dbtob(x) ((unsigned long)(x) << DEV_BSHIFT)
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/*
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* Map a ``block device block'' to a file system block.
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* This should be device dependent, and will be if we
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* add an entry to cdevsw/bdevsw for that purpose.
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* For now though just use DEV_BSIZE.
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*/
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#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
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#ifdef _KERNEL
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#include <machine/intr.h>
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/* Prototype needed for delay() */
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#ifndef _LOCORE
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void delay __P((int));
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void * alloca(size_t); /* XXX should be somewhere else */
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#endif
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#define DELAY(x) delay(x)
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#endif /* _KERNEL */
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#endif /* _PDP10_PARAM_H_ */
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