param.h revision 96329
1/*- 2 * Copyright (c) 2001 David E. O'Brien 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 38 * $FreeBSD: head/sys/powerpc/include/param.h 96329 2002-05-10 05:16:40Z benno $ 39 */ 40 41/* 42 * Machine dependent constants for PowerPC (32-bit only currently) 43 */ 44 45#include <machine/pte.h> 46 47/* 48 * Round p (pointer or byte index) up to a correctly-aligned value 49 * for all data types (int, long, ...). The result is unsigned int 50 * and must be cast to any desired pointer type. 51 */ 52#ifndef _ALIGNBYTES 53#define _ALIGNBYTES (sizeof(int) - 1) 54#endif 55#ifndef _ALIGN 56#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 57#endif 58 59#ifndef _MACHINE 60#define _MACHIN "powerpc" 61#endif 62#ifndef _MACHINE_ARCH 63#define _MACHINE_ARCH "powerpc" 64#endif 65 66#ifndef _NO_NAMESPACE_POLLUTION 67 68#ifndef _MACHINE_PARAM_H_ 69#define _MACHINE_PARAM_H_ 70 71#ifndef MACHINE 72#define MACHINE "powerpc" 73#endif 74#ifndef MACHINE_ARCH 75#define MACHINE_ARCH "powerpc" 76#endif 77#define MID_MACHINE MID_POWERPC 78 79#if !defined(LOCORE) 80#include <machine/cpu.h> 81#endif 82 83/* 84 * OBJFORMAT_NAMES is a comma-separated list of the object formats 85 * that are supported on the architecture. 86 */ 87#define OBJFORMAT_NAMES "elf" 88#define OBJFORMAT_DEFAULT "elf" 89 90#ifdef SMP 91#define MAXCPU 2 92#else 93#define MAXCPU 1 94#endif /* SMP */ 95 96#define ALIGNBYTES _ALIGNBYTES 97#define ALIGN(p) _ALIGN(p) 98 99#define PAGE_SHIFT 12 100#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 101#define PAGE_MASK (PAGE_SIZE - 1) 102#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 103 104#define KERNBASE 0x100000 /* start of kernel virtual */ 105#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 106 107#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 108#define DEV_BSIZE (1 << DEV_BSHIFT) 109 110#ifndef BLKDEV_IOSIZE 111#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 112#endif 113#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 114#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 115#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) 116 117#ifndef KSTACK_UPAGES 118#define KSTACK_PAGES 4 /* includes pcb */ 119#define KSTACK_GUARD_PAGES 1 120#endif 121#define USPACE (KSTACK_PAGES * PAGE_SIZE) /* total size of pcb */ 122#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB */ 123 124/* 125 * Constants related to network buffer management. 126 * MCLBYTES must be no larger than PAGE_SIZE. 127 */ 128#ifndef MSIZE 129#define MSIZE 256 /* size of an mbuf */ 130#endif /* MSIZE */ 131 132#ifndef MCLSHIFT 133#define MCLSHIFT 11 /* convert bytes to mbuf clusters */ 134#endif /* MCLSHIFT */ 135#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ 136 137/* 138 * Some macros for units conversion 139 */ 140 141/* pages ("clicks") to bytes */ 142#define ctob(x) ((x) << PAGE_SHIFT) 143 144/* bytes to clicks */ 145#define btoc(x) (((unsigned)(x) + PAGE_MASK) >> PAGE_SHIFT) 146 147/* pages ("clicks") to disk blocks */ 148#define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) 149#define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) 150 151/* bytes to disk blocks */ 152/* 153 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 154 * want to shift an unsigned type to avoid sign extension and we don't 155 * want to widen `bytes' unnecessarily. Assume that the result fits in 156 * a daddr_t. 157 */ 158#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 159 (sizeof (bytes) > sizeof(long) \ 160 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 161 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 162 163#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 164 ((off_t)(db) << DEV_BSHIFT) 165 166/* 167 * Mach derived conversion macros 168 */ 169#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 170#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 171#define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK) 172#define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 173 174#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 175#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 176 177#define powerpc_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 178#define powerpc_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 179 180#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 181 182/* XXX: NetBSD defines that we're using for the moment */ 183#define USER_SR 13 184#define KERNEL_SR 14 185#define KERNEL_VSIDBITS 0xfffff 186#define KERNEL_SEGMENT (0xfffff0 + KERNEL_SR) 187#define EMPTY_SEGMENT 0xfffff0 188#define USER_ADDR ((void *)(USER_SR << ADDR_SR_SHFT)) 189#define SEGMENT_LENGTH 0x10000000 190#define SEGMENT_MASK 0xf0000000 191 192#if !defined(NPMAPS) 193#define NPMAPS 32768 194#endif /* !defined(NPMAPS) */ 195 196#if !defined(MSGBUFSIZE) 197#define MSGBUFSIZE PAGE_SIZE 198#endif /* !defined(MSGBUFSIZE) */ 199 200/* 201 * XXX: Stop NetBSD msgbuf_paddr code from happening. 202 */ 203#define MSGBUFADDR 204 205#endif /* !_MACHINE_PARAM_H_ */ 206#endif /* !_NO_NAMESPACE_POLLUTION */ 207