1 /* $OpenBSD: param.h,v 1.20 2009/05/22 20:37:53 miod Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: Utah Hdr: machparam.h 1.11 89/08/14 37 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 38 */ 39 40 #ifndef _MIPS_PARAM_H_ 41 #define _MIPS_PARAM_H_ 42 43 #ifdef _KERNEL 44 #include <machine/cpu.h> 45 #endif 46 47 /* 48 * Round p (pointer or byte index) up to a correctly-aligned value for all 49 * data types (int, long, ...). The result is u_int and must be cast to 50 * any desired pointer type. 51 */ 52 #define ALIGNBYTES 7 53 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 54 #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof (t) - 1)) == 0) 55 56 #define NBPG 4096 /* bytes/page */ 57 #define PGOFSET (NBPG-1) /* byte offset into page */ 58 #define PGSHIFT 12 /* LOG2(NBPG) */ 59 60 #define PAGE_SHIFT 12 61 #define PAGE_SIZE (1 << PAGE_SHIFT) 62 #define PAGE_MASK (PAGE_SIZE - 1) 63 64 #define NPTEPG (NBPG/4) 65 66 #define NBSEG 0x400000 /* bytes/segment */ 67 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 68 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 69 70 #ifdef __LP64__ 71 #define KERNBASE 0xffffffff80000000L /* start of kernel virtual */ 72 #else 73 #define KERNBASE 0x80000000 /* start of kernel virtual */ 74 #endif 75 76 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 77 #define DEV_BSIZE (1 << DEV_BSHIFT) 78 #define BLKDEV_IOSIZE 2048 79 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 80 81 #ifdef __LP64__ 82 #define UPAGES 4 /* pages of u-area */ 83 #else 84 #define UPAGES 2 /* pages of u-area */ 85 #endif 86 87 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 88 #define USPACE_ALIGN (2*NBPG) /* u-area alignment 0-none */ 89 90 /* 91 * Constants related to network buffer management. 92 */ 93 #define NMBCLUSTERS 4096 /* map size, max cluster allocation */ 94 95 #define MSGBUFSIZE 8192 96 97 /* Default malloc arena size */ 98 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 99 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 100 101 /* pages ("clicks") (4096 bytes) to disk blocks */ 102 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 103 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 104 105 /* bytes to disk blocks */ 106 #define btodb(x) ((x) >> DEV_BSHIFT) 107 #define dbtob(x) ((x) << DEV_BSHIFT) 108 109 #ifdef _KERNEL 110 #ifndef _LOCORE 111 112 #define DELAY(n) delay(n) 113 void delay(int); 114 #endif 115 #endif /* !_KERNEL */ 116 117 #endif /* !_MIPS_PARAM_H_ */ 118