param.h revision 70651
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/arm/include/param.h 70651 2001-01-04 05:23:06Z obrien $ 39 */ 40 41/* 42 * Machine dependent constants for StrongARM 43 */ 44 45/* 46 * Round p (pointer or byte index) up to a correctly-aligned value 47 * for all data types (int, long, ...). The result is unsigned int 48 * and must be cast to any desired pointer type. 49 */ 50#ifndef _ALIGNBYTES 51#define _ALIGNBYTES (sizeof(int) - 1) 52#endif 53#ifndef _ALIGN 54#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 55#endif 56 57#ifndef _MACHINE 58#define _MACHIN "arm32" 59#endif 60#ifndef _MACHINE_ARCH 61#define _MACHINE_ARCH "arm32" 62#endif 63 64#ifndef _NO_NAMESPACE_POLLUTION 65 66#ifndef _MACHINE_PARAM_H_ 67#define _MACHINE_PARAM_H_ 68 69#ifndef MACHINE 70#define MACHINE "arm32" 71#endif 72#ifndef MACHINE_ARCH 73#define MACHINE_ARCH "arm32" 74#endif 75#define MID_MACHINE MID_ARM32 76 77#include <machine/cpu.h> 78 79/* 80 * OBJFORMAT_NAMES is a comma-separated list of the object formats 81 * that are supported on the architecture. 82 */ 83#define OBJFORMAT_NAMES "elf" 84#define OBJFORMAT_DEFAULT "elf" 85 86#ifdef SMP 87#define MAXCPU 2 88#else 89#define MAXCPU 1 90#endif /* SMP */ 91 92#define ALIGNBYTES _ALIGNBYTES 93#define ALIGN(p) _ALIGN(p) 94 95#define PAGE_SHIFT 12 96#define PAGE_SIZE (1 << PAGE_SHIFT) /* Page size */ 97#define PAGE_MASK (PAGE_SIZE - 1) 98#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 99 100#define KERNBASE 0x100000 /* start of kernel virtual */ 101#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 102 103#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 104#define DEV_BSIZE (1 << DEV_BSHIFT) 105 106#ifndef BLKDEV_IOSIZE 107#define BLKDEV_IOSIZE PAGE_SIZE /* default block device I/O size */ 108#endif 109#define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ 110#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ 111#define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) 112 113#define UPAGES 2 /* pages of u-area */ 114#define USPACE (UPAGES * PAGE_SIZE) /* total size of u-area */ 115 116/* 117 * Constants related to network buffer management. 118 * MCLBYTES must be no larger than PAGE_SIZE. 119 */ 120#ifndef MSIZE 121#define MSIZE 256 /* size of an mbuf */ 122#endif /* MSIZE */ 123 124#ifndef MCLSHIFT 125#define MCLSHIFT 11 /* convert bytes to mbuf clusters */ 126#endif /* MCLSHIFT */ 127#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ 128 129/* 130 * Some macros for units conversion 131 */ 132 133/* pages ("clicks") to bytes */ 134#define ctob(x) ((x) << PAGE_SHIFT) 135 136/* bytes to clicks */ 137#define btoc(x) (((unsigned)(x) + PAGE_MASK) >> PAGE_SHIFT) 138 139/* pages ("clicks") to disk blocks */ 140#define ctod(x) ((x) << (PAGE_SHIFT - DEV_BSHIFT)) 141#define dtoc(x) ((x) >> (PAGE_SHIFT - DEV_BSHIFT)) 142 143/* bytes to disk blocks */ 144/* 145 * btodb() is messy and perhaps slow because `bytes' may be an off_t. We 146 * want to shift an unsigned type to avoid sign extension and we don't 147 * want to widen `bytes' unnecessarily. Assume that the result fits in 148 * a daddr_t. 149 */ 150#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 151 (sizeof (bytes) > sizeof(long) \ 152 ? (daddr_t)((unsigned long long)(bytes) >> DEV_BSHIFT) \ 153 : (daddr_t)((unsigned long)(bytes) >> DEV_BSHIFT)) 154 155#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 156 ((off_t)(db) << DEV_BSHIFT) 157 158/* 159 * Mach derived conversion macros 160 */ 161#define trunc_page(x) ((x) & ~PAGE_MASK) 162#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 163#define trunc_4mpage(x) ((unsigned)(x) & ~PDRMASK) 164#define round_4mpage(x) ((((unsigned)(x)) + PDRMASK) & ~PDRMASK) 165 166#define atop(x) ((unsigned)(x) >> PAGE_SHIFT) 167#define ptoa(x) ((unsigned)(x) << PAGE_SHIFT) 168 169#define arm32_btop(x) ((unsigned)(x) >> PAGE_SHIFT) 170#define arm32_ptob(x) ((unsigned)(x) << PAGE_SHIFT) 171 172#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 173 174#endif /* !_MACHINE_PARAM_H_ */ 175#endif /* !_NO_NAMESPACE_POLLUTION */ 176