1/* 2 * Copyright (c) 2000-2010 Apple Inc. All rights reserved. 3 */ 4/*- 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)param.h 8.1 (Berkeley) 4/4/95 42 */ 43 44/* 45 * Machine dependent constants for ARM 46 */ 47 48#ifndef _ARM_PARAM_H_ 49#define _ARM_PARAM_H_ 50 51#include <arm/_param.h> 52 53/* 54 * Round p (pointer or byte index) up to a correctly-aligned value for all 55 * data types (int, long, ...). The result is unsigned int and must be 56 * cast to any desired pointer type. 57 */ 58#define ALIGNBYTES __DARWIN_ALIGNBYTES 59#define ALIGN(p) __DARWIN_ALIGN(p) 60 61#define NBPG 4096 /* bytes/page */ 62#define PGOFSET (NBPG-1) /* byte offset into page */ 63#define PGSHIFT 12 /* LOG2(NBPG) */ 64 65#define DEV_BSIZE 512 66#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 67#define BLKDEV_IOSIZE 2048 68#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 69 70#define CLSIZE 1 71#define CLSIZELOG2 0 72 73/* 74 * Constants related to network buffer management. 75 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 76 * on machines that exchange pages of input or output buffers with mbuf 77 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 78 * of the hardware page size. 79 */ 80#define MSIZESHIFT 8 /* 256 */ 81#define MSIZE (1 << MSIZESHIFT) /* size of an mbuf */ 82#define MCLSHIFT 11 /* 2048 */ 83#define MCLBYTES (1 << MCLSHIFT) /* size of an mbuf cluster */ 84#define MBIGCLSHIFT 12 /* 4096 */ 85#define MBIGCLBYTES (1 << MBIGCLSHIFT) /* size of a big cluster */ 86#define M16KCLSHIFT 14 /* 16384 */ 87#define M16KCLBYTES (1 << M16KCLSHIFT) /* size of a jumbo cluster */ 88 89#define MCLOFSET (MCLBYTES - 1) 90#ifndef NMBCLUSTERS 91#define NMBCLUSTERS CONFIG_NMBCLUSTERS /* cl map size */ 92#endif 93 94/* 95 * Some macros for units conversion 96 */ 97/* Core clicks (NeXT_page_size bytes) to segments and vice versa */ 98#define ctos(x) (x) 99#define stoc(x) (x) 100 101/* Core clicks (4096 bytes) to disk blocks */ 102#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 103#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 104#define dtob(x) ((x)<<DEV_BSHIFT) 105 106/* clicks to bytes */ 107#define ctob(x) ((x)<<PGSHIFT) 108 109/* bytes to clicks */ 110#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 111 112#ifdef __APPLE__ 113#define btodb(bytes, devBlockSize) \ 114 ((unsigned)(bytes) / devBlockSize) 115#define dbtob(db, devBlockSize) \ 116 ((unsigned)(db) * devBlockSize) 117#else 118#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 119 ((unsigned)(bytes) >> DEV_BSHIFT) 120#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 121 ((unsigned)(db) << DEV_BSHIFT) 122#endif 123 124/* 125 * Map a ``block device block'' to a file system block. 126 * This should be device dependent, and will be if we 127 * add an entry to cdevsw/bdevsw for that purpose. 128 * For now though just use DEV_BSIZE. 129 */ 130#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 131 132/* 133 * Macros to decode (and encode) processor status word. 134 */ 135#define STATUS_WORD(rpl, ipl) (((ipl) << 8) | (rpl)) 136#define USERMODE(x) (((x) & 3) == 3) 137#define BASEPRI(x) (((x) & (255 << 8)) == 0) 138 139#if defined(KERNEL) || defined(STANDALONE) 140#define DELAY(n) delay(n) 141 142#else /* defined(KERNEL) || defined(STANDALONE) */ 143#define DELAY(n) { register int N = (n); while (--N > 0); } 144#endif /* defined(KERNEL) || defined(STANDALONE) */ 145 146#endif /* _ARM_PARAM_H_ */ 147