param.h revision 1.31
1/* $NetBSD: param.h,v 1.31 1997/02/24 23:17:38 fvdl 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#ifndef _MACHINE_PARAM_H_ 45#define _MACHINE_PARAM_H_ 46 47/* 48 * Machine dependent constants for amiga 49 */ 50#define _MACHINE amiga 51#define MACHINE "amiga" 52#define _MACHINE_ARCH m68k 53#define MACHINE_ARCH "m68k" 54#define MID_MACHINE MID_M68K 55 56/* 57 * Round p (pointer or byte index) up to a correctly-aligned value 58 * for all data types (int, long, ...). The result is u_int and 59 * must be cast to any desired pointer type. 60 * 61 * ALIGNED_POINTER is a boolean macro that checks whether an address 62 * is valid to fetch data elements of type t from on this architecture. 63 * This does not reflect the optimal alignment, just the possibility 64 * (within reasonable limits). 65 * 66 */ 67#define ALIGNBYTES (sizeof(int) - 1) 68#define ALIGN(p) (((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1)) 69#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 70 71#define NBPG 8192 /* bytes/page */ 72#define PGOFSET (NBPG-1) /* byte offset into page */ 73#define PGSHIFT 13 /* LOG2(NBPG) */ 74#define NPTEPG (NBPG/(sizeof(u_int))) 75 76#define NBSEG ((mmutype == MMU_68040) ? 32*NBPG : 2048*NBPG) /* bytes/segment */ 77#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 78#define SEGSHIFT 24 /* LOG2(NBSEG) [68030 value] */ 79 80#define KERNBASE 0x0 /* start of kernel virtual */ 81#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 82 83#define DEV_BSIZE 512 84#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 85#define BLKDEV_IOSIZE 2048 86#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 87 88#define CLSIZE 1 89#define CLSIZELOG2 0 90 91/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 92#define SSIZE 1 /* initial stack size/NBPG */ 93#define SINCR 1 /* increment of stack/NBPG */ 94 95#define UPAGES 2 /* pages of u-area */ 96#define USPACE (UPAGES * NBPG) 97 98/* 99 * Constants related to network buffer management. 100 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 101 * on machines that exchange pages of input or output buffers with mbuf 102 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 103 * of the hardware page size. 104 */ 105#define MSIZE 128 /* size of an mbuf */ 106#define MCLSHIFT 11 107#define MCLBYTES (1 << MCLSHIFT) 108#define MCLOFSET (MCLBYTES - 1) 109#ifndef NMBCLUSTERS 110#ifdef GATEWAY 111#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 112#else 113#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 114#endif 115#endif 116 117/* 118 * Size of kernel malloc arena in CLBYTES-sized logical pages 119 */ 120#ifndef NKMEMCLUSTERS 121#define NKMEMCLUSTERS (3072*1024/CLBYTES) 122#endif 123 124/* pages ("clicks") to disk blocks */ 125#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 126#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 127 128/* pages to bytes */ 129#define ctob(x) ((x) << PGSHIFT) 130#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 131 132/* bytes to disk blocks */ 133#define btodb(x) ((x) >> DEV_BSHIFT) 134#define dbtob(x) ((x) << DEV_BSHIFT) 135 136/* 137 * Map a ``block device block'' to a file system block. 138 * This should be device dependent, and should use the bsize 139 * field from the disk label. 140 * For now though just use DEV_BSIZE. 141 */ 142#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 143 144/* 145 * Mach derived conversion macros 146 */ 147#define amiga_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1)) 148#define amiga_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1)) 149#define amiga_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 150#define amiga_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 151#define amiga_btop(x) ((unsigned)(x) >> PGSHIFT) 152#define amiga_ptob(x) ((unsigned)(x) << PGSHIFT) 153 154/* 155 * spl functions; all are normally done in-line 156 */ 157#include <machine/psl.h> 158 159#ifdef _KERNEL 160/* 161 * point to the custom.intenar and custom.intenaw respectively. 162 */ 163extern volatile unsigned short *amiga_intena_read, *amiga_intena_write; 164 165#ifndef _LOCORE 166void delay __P((int)); 167void DELAY __P((int)); 168#endif 169#endif 170 171#endif /* !_MACHINE_PARAM_H_ */ 172