param.h revision 1.1
1/* $NetBSD: param.h,v 1.1 1996/09/30 16:34:28 ws 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 50#define PGSHIFT 12 51#define NBPG (1 << PGSHIFT) /* Page size */ 52#define PGOFSET (NBPG - 1) 53 54#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 55#define DEV_BSIZE (1 << DEV_BSHIFT) 56#define BLKDEV_IOSIZE NBPG 57#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 58 59#define CLSIZELOG2 0 60#define CLSIZE (1 << CLSIZELOG2) 61 62#define UPAGES 4 63#define USPACE (UPAGES * NBPG) 64 65#define KERNBASE 0x100000 66 67/* 68 * Constants related to network buffer management. 69 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 70 * on machines that exchange pages of input or output buffers with mbuf 71 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 72 * of the hardware page size. 73 */ 74#define MSIZE 128 /* size of an mbuf */ 75#define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 76#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 77 78#ifndef NMBCLUSTERS 79#ifdef GATEWAY 80#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 81#else 82#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 83#endif 84#endif 85 86/* 87 * Size of kernel malloc arena in CLBYTES-sized logical pages. 88 */ 89#ifndef NKMEMCLUSTERS 90#define NKMEMCLUSTERS (128 * 1024 * 1024 / CLBYTES) 91#endif 92 93/* 94 * pages ("clicks") to disk blocks 95 */ 96#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 97#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 98/* 99 * bytes to pages 100 */ 101#define ctob(x) ((x) << PGSHIFT) 102#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 103 104/* 105 * bytes to disk blocks 106 */ 107#define dbtob(x) ((x) << DEV_BSHIFT) 108#define btodb(x) ((x) >> DEV_BSHIFT) 109 110/* 111 * Segment handling stuff 112 */ 113#define SEGMENT_LENGTH 0x10000000 114#define SEGMENT_MASK 0xf0000000 115 116/* 117 * Fixed segments 118 */ 119#define USER_SR 13 120#define KERNEL_SR 14 121#define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) 122#define EMPTY_SEGMENT 0xfffff0 123#define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 124 125/* 126 * Some system constants 127 */ 128#ifndef HTABENTS 129#define HTABENTS 1024 /* Number of hashslots in HTAB */ 130#endif 131#ifndef NPMAPS 132#define NPMAPS 32768 /* Number of pmaps in system */ 133#endif 134 135/* 136 * Temporary kludge till we do (ov)bcopy in assembler 137 */ 138#define ovbcopy bcopy 139