param.h revision 1.13
1/* $NetBSD: param.h,v 1.13 2002/03/09 23:35:59 chs Exp $ */ 2 3/*- 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#ifndef _POWERPC_PARAM_H 35#define _POWERPC_PARAM_H 36 37#ifdef _KERNEL 38#ifndef _LOCORE 39#include <machine/cpu.h> 40#endif /* _LOCORE */ 41#endif 42 43/* 44 * Machine dependent constants for PowerPC (32-bit only currently) 45 */ 46#ifndef MACHINE 47#define MACHINE "powerpc" 48#endif 49#define MACHINE_ARCH "powerpc" 50#define MID_MACHINE MID_POWERPC 51 52#define ALIGNBYTES (sizeof(double) - 1) 53#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 54#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 55 56#define PGSHIFT 12 57#define NBPG (1 << PGSHIFT) /* Page size */ 58#define PGOFSET (NBPG - 1) 59 60#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 61#define DEV_BSIZE (1 << DEV_BSHIFT) 62#define BLKDEV_IOSIZE NBPG 63#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 64 65#define UPAGES 4 66#define USPACE (UPAGES * NBPG) 67 68#ifndef MSGBUFSIZE 69#define MSGBUFSIZE NBPG /* default message buffer size */ 70#endif 71 72#ifndef KERNBASE 73#define KERNBASE 0x100000 74#endif 75 76/* 77 * Constants related to network buffer management. 78 * MCLBYTES must be no larger than NBPG (the software page size), and, 79 * on machines that exchange pages of input or output buffers with mbuf 80 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 81 * of the hardware page size. 82 */ 83#define MSIZE 256 /* size of an mbuf */ 84#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 85#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 86 87#ifndef NMBCLUSTERS 88 89#if defined(_KERNEL_OPT) 90#include "opt_gateway.h" 91#endif 92 93#ifdef GATEWAY 94#define NMBCLUSTERS 2048 /* map size, max cluster allocation */ 95#else 96#define NMBCLUSTERS 1024 /* map size, max cluster allocation */ 97#endif 98#endif 99 100/* 101 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 102 * logical pages. 103 */ 104#ifndef NKMEMPAGES_MIN_DEFAULT 105#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT) 106#endif 107#ifndef NKMEMPAGES_MAX_DEFAULT 108#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 109#endif 110 111/* 112 * pages ("clicks") to disk blocks 113 */ 114#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 115#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 116/* 117 * bytes to pages 118 */ 119#define ctob(x) ((x) << PGSHIFT) 120#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 121 122/* 123 * bytes to disk blocks 124 */ 125#define dbtob(x) ((x) << DEV_BSHIFT) 126#define btodb(x) ((x) >> DEV_BSHIFT) 127 128#ifdef OLDPMAP 129/* 130 * Segment handling stuff 131 */ 132#define SEGMENT_LENGTH 0x10000000 133#define SEGMENT_MASK 0xf0000000 134 135/* 136 * Fixed segments 137 */ 138#define USER_SR 13 139#define KERNEL_SR 14 140#define KERNEL_SEGMENT (0xf00000 + KERNEL_SR) 141#define EMPTY_SEGMENT 0xfffff0 142#define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 143 144/* 145 * Some system constants 146 */ 147#ifndef NPMAPS 148#define NPMAPS 32768 /* Number of pmaps in system */ 149#endif 150 151#endif /* OLDPMAP */ 152 153#endif /* _POWERPC_PARAM_H_ */ 154