1/* $NetBSD: param.h,v 1.28 2011/03/06 20:34:57 he 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. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah Hdr: machparam.h 1.11 89/08/14 38 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 39 */ 40 41#ifndef _ARC_PARAM_H_ 42#define _ARC_PARAM_H_ 43 44/* 45 * Machine-dependent constants (VM, etc) common across MIPS cpus 46 */ 47#define _MACHINE arc 48#define MACHINE "arc" 49 50#include <mips/mips_param.h> 51 52/* 53 * Machine dependent constants for ARC BIOS MIPS machines: 54 * Acer Labs PICA_61 55 * Deskstation rPC44 56 * Deskstation Tyne 57 * Etc 58 */ 59#define KERNBASE 0x80000000 /* start of kernel virtual */ 60#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 61 62#define DEV_BSIZE 512 63#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 64#define BLKDEV_IOSIZE 2048 65#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 66 67#define SSIZE 1 /* initial stack size/NBPG */ 68#define SINCR 1 /* increment of stack/NBPG */ 69 70#define UPAGES 2 /* pages of u-area */ 71#if defined(_LOCORE) && defined(notyet) 72#define UADDR 0xffffffffffffc000 /* address of u */ 73#else 74#define UADDR 0xffffc000 /* address of u */ 75#endif 76#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 77#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 78#define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 79 80/* 81 * Constants related to network buffer management. 82 * MCLBYTES must be no larger than NBPG (the software page size), and, 83 * on machines that exchange pages of input or output buffers with mbuf 84 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 85 * of the hardware page size. 86 */ 87#define MSIZE 256 /* size of an mbuf */ 88 89#ifndef MCLSHIFT 90#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 91 /* 2K cluster can hold Ether frame */ 92#endif /* MCLSHIFT */ 93 94#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 95 96/* bytes to disk blocks */ 97#define btodb(x) ((x) >> DEV_BSHIFT) 98#define dbtob(x) ((x) << DEV_BSHIFT) 99 100#ifdef _KERNEL 101#ifndef _LOCORE 102 103extern int cpuspeed; 104void delay(unsigned int n); 105 106#define DELAY(n) delay(n) 107 108#include <machine/intr.h> 109 110#endif /* _LOCORE */ 111#endif /* _KERNEL */ 112 113#endif /* _ARC_PARAM_H_ */ 114