1 /* $NetBSD: param.h,v 1.16 2002/02/26 15:13:20 simonb 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 NBPG (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 97 #ifndef MCLSHIFT 98 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 99 /* 2K cluster can hold Ether frame */ 100 #endif /* MCLSHIFT */ 101 102 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 103 104 #ifndef NMBCLUSTERS 105 #if defined(_KERNEL_OPT) 106 #include "opt_gateway.h" 107 #endif 108 109 #ifdef GATEWAY 110 #define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 111 #else 112 #define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 113 #endif 114 #endif 115 116 /* bytes to disk blocks */ 117 #define btodb(x) ((x) >> DEV_BSHIFT) 118 #define dbtob(x) ((x) << DEV_BSHIFT) 119 120 #ifdef _KERNEL 121 #ifndef _LOCORE 122 123 extern int cpuspeed; 124 extern void delay __P((int n)); 125 126 #if 0 /* XXX: should use mips_mcclock.c */ 127 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 128 #else 129 /* 130 * Delay is based on an assumtion that each time in the loop 131 * takes 3 clocks. Three is for branch and subtract in the delay slot. 132 */ 133 #define DELAY(n) { register int N = cpuspeed * (n); while ((N -= 3) > 0); } 134 #endif 135 136 #include <machine/intr.h> 137 138 #endif /* _LOCORE */ 139 #endif /* _KERNEL */ 140 141 #endif /* _ARC_PARAM_H_ */ 142