param.h revision 1.20
1/* $NetBSD: param.h,v 1.20 1997/02/26 12:22:06 leo Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California. 6 * 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. 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 7.8 (Berkeley) 6/28/91 43 */ 44 45#ifndef _MACHINE_PARAM_H_ 46#define _MACHINE_PARAM_H_ 47 48/* 49 * Machine dependent constants for atari 50 */ 51#define _MACHINE atari 52#define MACHINE "atari" 53#define _MACHINE_ARCH m68k 54#define MACHINE_ARCH "m68k" 55#define MID_MACHINE MID_M68K 56 57/* 58 * Round p (pointer or byte index) up to a correctly-aligned value 59 * for all data types (int, long, ...). The result is u_int and 60 * must be cast to any desired pointer type. 61 * 62 * ALIGNED_POINTER is a boolean macro that checks whether an address 63 * is valid to fetch data elements of type t from on this architecture. 64 * This does not reflect the optimal alignment, just the possibility 65 * (within reasonable limits). 66 * 67 */ 68#define ALIGNBYTES (sizeof(int) - 1) 69#define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 70#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 71 72#define NBPG 8192 /* bytes/page */ 73#define PGOFSET (NBPG-1) /* byte offset into page */ 74#define PGSHIFT 13 /* LOG2(NBPG) */ 75#define NPTEPG (NBPG/(sizeof(u_int))) 76 77 /* bytes/segment */ 78#define NBSEG ((mmutype == MMU_68040) ? 32*NBPG : 2048*NBPG) 79 /* byte offset into segment */ 80#define SEGOFSET (NBSEG-1) 81#define SEGSHIFT 24 /* LOG2(NBSEG) [68030 value] */ 82 83#define KERNBASE 0x0 /* start of kernel virtual */ 84#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 85 86#define DEV_BSIZE 512 87#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 88#define BLKDEV_IOSIZE 2048 89#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 90 91#define CLSIZE 1 92#define CLSIZELOG2 0 93 94/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 95#define SSIZE 1 /* initial stack size/NBPG */ 96#define SINCR 1 /* increment of stack/NBPG */ 97 98#define UPAGES 2 /* pages of u-area */ 99#define USPACE (UPAGES * NBPG) 100 101/* 102 * Constants related to network buffer management. 103 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 104 * on machines that exchange pages of input or output buffers with mbuf 105 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 106 * of the hardware page size. 107 */ 108#define MSIZE 128 /* size of an mbuf */ 109 110#ifndef MCLSHIFT 111#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 112#endif /* MCLSHIFT */ 113 114#define MCLBYTES (1 << MCLSHIFT) 115#define MCLOFSET (MCLBYTES - 1) 116#ifndef NMBCLUSTERS 117#ifdef GATEWAY 118#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 119#else 120#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 121#endif 122#endif 123 124/* 125 * Size of kernel malloc arena in CLBYTES-sized logical pages 126 */ 127#ifndef NKMEMCLUSTERS 128#define NKMEMCLUSTERS (3072*1024/CLBYTES) 129#endif 130 131/* pages ("clicks") to disk blocks */ 132#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 133#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 134 135/* pages to bytes */ 136#define ctob(x) ((x) << PGSHIFT) 137#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 138 139/* bytes to disk blocks */ 140#define btodb(x) ((x) >> DEV_BSHIFT) 141#define dbtob(x) ((x) << DEV_BSHIFT) 142 143/* 144 * Map a ``block device block'' to a file system block. 145 * This should be device dependent, and should use the bsize 146 * field from the disk label. 147 * For now though just use DEV_BSIZE. 148 */ 149#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 150 151/* 152 * Mach derived conversion macros 153 */ 154#define atari_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 155#define atari_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 156#define atari_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 157#define atari_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 158#define atari_btos(x) ((unsigned)(x) >> SEGSHIFT) 159#define atari_stob(x) ((unsigned)(x) << SEGSHIFT) 160#define atari_btop(x) ((unsigned)(x) >> PGSHIFT) 161#define atari_ptob(x) ((unsigned)(x) << PGSHIFT) 162 163#include <machine/intr.h> 164 165#ifdef _KERNEL 166void delay __P((int)); 167 168#define DELAY(n) delay(n) 169#endif /* _KERNEL */ 170 171#endif /* !_MACHINE_PARAM_H_ */ 172