param.h revision 1.8
1/* $NetBSD: param.h,v 1.8 2000/06/30 17:55:17 itojun 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#ifdef _KERNEL 35#ifndef _LOCORE 36#include <machine/cpu.h> 37#endif /* _LOCORE */ 38#endif 39 40/* 41 * Machine dependent constants for PowerPC (32-bit only currently) 42 */ 43#define MACHINE "powerpc" 44#define MACHINE_ARCH "powerpc" 45#define MID_MACHINE MID_POWERPC 46 47#define ALIGNBYTES (sizeof(double) - 1) 48#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 49#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 50 51#define PGSHIFT 12 52#define NBPG (1 << PGSHIFT) /* Page size */ 53#define PGOFSET (NBPG - 1) 54 55#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 56#define DEV_BSIZE (1 << DEV_BSHIFT) 57#define BLKDEV_IOSIZE NBPG 58#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 59 60#define UPAGES 4 61#define USPACE (UPAGES * NBPG) 62 63#ifndef MSGBUFSIZE 64#define MSGBUFSIZE NBPG /* default message buffer size */ 65#endif 66 67#define KERNBASE 0x100000 68 69/* 70 * Constants related to network buffer management. 71 * MCLBYTES must be no larger than NBPG (the software page size), and, 72 * on machines that exchange pages of input or output buffers with mbuf 73 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 74 * of the hardware page size. 75 */ 76#define MSIZE 256 /* size of an mbuf */ 77#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 78#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 79 80#ifndef NMBCLUSTERS 81 82#if defined(_KERNEL) && !defined(_LKM) 83#include "opt_gateway.h" 84#endif /* _KERNEL && ! _LKM */ 85 86#ifdef GATEWAY 87#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 88#else 89#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 90#endif 91#endif 92 93/* 94 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 95 * logical pages. 96 */ 97#define NKMEMPAGES_MIN_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 98#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 99 100/* 101 * pages ("clicks") to disk blocks 102 */ 103#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 104#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 105/* 106 * bytes to pages 107 */ 108#define ctob(x) ((x) << PGSHIFT) 109#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 110 111/* 112 * bytes to disk blocks 113 */ 114#define dbtob(x) ((x) << DEV_BSHIFT) 115#define btodb(x) ((x) >> DEV_BSHIFT) 116 117/* 118 * Segment handling stuff 119 */ 120#define SEGMENT_LENGTH 0x10000000 121#define SEGMENT_MASK 0xf0000000 122 123/* 124 * Fixed segments 125 */ 126#define USER_SR 13 127#define KERNEL_SR 14 128#define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) 129#define EMPTY_SEGMENT 0xfffff0 130#define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 131 132/* 133 * Some system constants 134 */ 135#ifndef NPMAPS 136#define NPMAPS 32768 /* Number of pmaps in system */ 137#endif 138