param.h revision 1.14
1/* $NetBSD: param.h,v 1.14 2000/06/30 17:55:12 itojun Exp $ */ 2/* $OpenBSD: param.h,v 1.9 1997/04/30 09:54:15 niklas Exp $ */ 3 4/* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * from: Utah Hdr: machparam.h 1.11 89/08/14 42 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45#ifndef _ARC_PARAM_H_ 46#define _ARC_PARAM_H_ 47 48/* 49 * Machine-dependent constants (VM, etc) common across MIPS cpus 50 */ 51#include <mips/mips_param.h> 52 53/* 54 * Machine dependent constants for ARC BIOS MIPS machines: 55 * Acer Labs PICA_61 56 * Deskstation rPC44 57 * Deskstation Tyne 58 * Etc 59 */ 60#define _MACHINE_ARCH mipsel 61#define MACHINE_ARCH "mipsel" 62#define _MACHINE arc 63#define MACHINE "arc" 64#define MID_MACHINE MID_PMAX /* XXX Bogus, but needed for now... */ 65 66#define KERNBASE 0x80000000 /* start of kernel virtual */ 67#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 68 69#define DEV_BSIZE 512 70#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 71#define BLKDEV_IOSIZE 2048 72/* XXX Maxphys temporary changed to 32K while SCSI driver is fixed. */ 73#define MAXPHYS (32 * 1024) /* max raw I/O transfer size */ 74 75#define SSIZE 1 /* initial stack size/NBPG */ 76#define SINCR 1 /* increment of stack/NBPG */ 77 78#define UPAGES 2 /* pages of u-area */ 79#if defined(_LOCORE) && defined(notyet) 80#define UADDR 0xffffffffffffc000 /* address of u */ 81#else 82#define UADDR 0xffffc000 /* address of u */ 83#endif 84#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 85#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 86#define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 87 88/* 89 * Constants related to network buffer management. 90 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 91 * on machines that exchange pages of input or output buffers with mbuf 92 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 93 * of the hardware page size. 94 */ 95#define MSIZE 256 /* size of an mbuf */ 96#define MCLSHIFT 11 97#define MCLBYTES (1 << MCLSHIFT) /* enough for whole Ethernet packet */ 98#define MCLOFSET (MCLBYTES - 1) 99#ifndef NMBCLUSTERS 100 101#if defined(_KERNEL) && !defined(_LKM) 102#include "opt_gateway.h" 103#endif /* _KERNEL && ! _LKM */ 104 105#ifdef GATEWAY 106#define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 107#else 108#define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 109#endif 110#endif 111 112/* bytes to disk blocks */ 113#define btodb(x) ((x) >> DEV_BSHIFT) 114#define dbtob(x) ((x) << DEV_BSHIFT) 115 116#ifdef _KERNEL 117#ifndef _LOCORE 118 119extern int cpuspeed; 120extern void delay __P((int n)); 121 122#if 0 /* XXX: should use mips_mcclock.c */ 123#define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 124#else 125/* 126 * Delay is based on an assumtion that each time in the loop 127 * takes 3 clocks. Three is for branch and subtract in the delay slot. 128 */ 129#define DELAY(n) { register int N = cpuspeed * (n); while ((N -= 3) > 0); } 130#endif 131 132#include <machine/intr.h> 133 134#endif /* _LOCORE */ 135#endif /* _KERNEL */ 136 137#endif /* _ARC_PARAM_H_ */ 138