param.h revision 1.18
1/* $NetBSD: param.h,v 1.18 1997/02/26 01:45:41 jonathan Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah Hdr: machparam.h 1.11 89/08/14 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45/* 46 * Machine-dependent constants (VM, etc) common across MIPS cpus 47 */ 48 49#include <mips/mips_param.h> 50 51/* 52 * Machine dependent constants for DEC Station 3100. 53 */ 54 55#define _MACHINE pmax 56#define MACHINE "pmax" 57#define _MACHINE_ARCH mips 58#define MACHINE_ARCH "mips" 59#define MID_MACHINE MID_PMAX 60 61#define KERNBASE 0x80000000 /* start of kernel virtual */ 62#define KERNTEXTOFF 0x80030000 /* start of kernel text for kvm_mkdb */ 63#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 64 65#define DEV_BSIZE 512 66#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 67#define BLKDEV_IOSIZE 2048 68#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 69 70#define CLSIZE 1 71#define CLSIZELOG2 0 72 73/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 74#define SSIZE 1 /* initial stack size/NBPG */ 75#define SINCR 1 /* increment of stack/NBPG */ 76 77#define UPAGES 2 /* pages of u-area */ 78#define UADDR 0xffffd000 /* address of u */ 79#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 80#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 81#define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 82 83/* 84 * Constants related to network buffer management. 85 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 86 * on machines that exchange pages of input or output buffers with mbuf 87 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 88 * of the hardware page size. 89 */ 90#define MSIZE 128 /* size of an mbuf */ 91 92#ifndef MCLSHIFT 93 94# define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 95 /* 2K cluster can hold Ether frame */ 96#endif /* MCLSHIFT */ 97 98#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 99#define MCLOFSET (MCLBYTES - 1) 100 101#ifndef NMBCLUSTERS 102#ifdef GATEWAY 103#define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 104#else 105#define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 106#endif 107#endif 108 109#ifdef _KERNEL 110#ifndef _LOCORE 111extern int cpuspeed; 112#define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 113#endif 114#endif /* !_KERNEL */ 115