178 lines
5.6 KiB
C
178 lines
5.6 KiB
C
/* $NetBSD: param.h,v 1.52 2003/08/07 16:30:11 agc 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 _VAX_PARAM_H_
|
|
#define _VAX_PARAM_H_
|
|
|
|
/*
|
|
* Machine dependent constants for VAX.
|
|
*/
|
|
|
|
#define _MACHINE vax
|
|
#define MACHINE "vax"
|
|
#define _MACHINE_ARCH vax
|
|
#define MACHINE_ARCH "vax"
|
|
#define MID_MACHINE MID_VAX
|
|
|
|
/*
|
|
* 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)(p) + ALIGNBYTES) &~ ALIGNBYTES)
|
|
#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
|
|
|
|
#define PGSHIFT 12 /* LOG2(NBPG) */
|
|
#define NBPG (1 << PGSHIFT) /* (1 << PGSHIFT) bytes/page */
|
|
#define PGOFSET (NBPG - 1) /* byte offset into page */
|
|
|
|
#define VAX_PGSHIFT 9
|
|
#define VAX_NBPG (1 << VAX_PGSHIFT)
|
|
#define VAX_PGOFSET (VAX_NBPG - 1)
|
|
#define VAX_NPTEPG (VAX_NBPG / 4)
|
|
|
|
#define KERNBASE 0x80000000 /* start of kernel virtual */
|
|
|
|
#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 MAXBSIZE 0x4000 /* max FS block size - XXX */
|
|
|
|
#define UPAGES 2 /* pages of u-area */
|
|
#define USPACE (NBPG*UPAGES)
|
|
#define REDZONEADDR (VAX_NBPG*3) /* Must be > sizeof(struct user) */
|
|
|
|
#ifndef MSGBUFSIZE
|
|
#define MSGBUFSIZE NBPG /* default message buffer size */
|
|
#endif
|
|
|
|
/*
|
|
* KVA is very tight on vax, reduce the amount of KVA used by pipe
|
|
* "direct" write code to reasonably low value.
|
|
*/
|
|
#ifndef PIPE_DIRECT_CHUNK
|
|
#define PIPE_DIRECT_CHUNK 65536
|
|
#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 512 /* map size, max cluster allocation */
|
|
#else
|
|
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
|
|
#endif
|
|
#endif
|
|
|
|
/*
|
|
* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
|
|
* logical pages.
|
|
*/
|
|
#define NKMEMPAGES_MIN_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
|
|
#define NKMEMPAGES_MAX_DEFAULT ((4 * 1024 * 1024) >> PAGE_SHIFT)
|
|
|
|
/*
|
|
* Some macros for units conversion
|
|
*/
|
|
|
|
/* pages ("clicks") to disk blocks */
|
|
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
|
|
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
|
|
|
|
/* clicks to bytes */
|
|
#define ctob(x) ((x) << PGSHIFT)
|
|
#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
|
|
#define btop(x) ((x) >> PGSHIFT)
|
|
|
|
/* bytes to disk blocks */
|
|
#define btodb(x) ((x) >> DEV_BSHIFT)
|
|
#define dbtob(x) ((x) << DEV_BSHIFT)
|
|
|
|
/* MD conversion macros */
|
|
#define vax_btoc(x) (((unsigned)(x) + VAX_PGOFSET) >> VAX_PGSHIFT)
|
|
#define vax_btop(x) (((unsigned)(x)) >> VAX_PGSHIFT)
|
|
|
|
/*
|
|
* 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))
|
|
|
|
#ifdef _KERNEL
|
|
#include <machine/intr.h>
|
|
|
|
/* Prototype needed for delay() */
|
|
#ifndef _LOCORE
|
|
void delay __P((int));
|
|
/* inline macros used inside kernel */
|
|
#include <machine/macros.h>
|
|
#endif
|
|
|
|
#define DELAY(x) delay(x)
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* _VAX_PARAM_H_ */
|