1 /* $OpenBSD: param.h,v 1.18 2008/05/04 09:57:47 martin 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 #ifdef _LOCORE 45 #include <machine/psl.h> 46 #else 47 #include <machine/cpu.h> 48 #endif 49 #endif 50 51 /* 52 * Round p (pointer or byte index) up to a correctly-aligned value for all 53 * data types (int, long, ...). The result is u_int and must be cast to 54 * any desired pointer type. 55 */ 56 #define ALIGNBYTES 7 57 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 58 #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof (t) - 1)) == 0) 59 60 #define NBPG 4096 /* bytes/page */ 61 #define PGOFSET (NBPG-1) /* byte offset into page */ 62 #define PGSHIFT 12 /* LOG2(NBPG) */ 63 64 #define PAGE_SHIFT 12 65 #define PAGE_SIZE (1 << PAGE_SHIFT) 66 #define PAGE_MASK (PAGE_SIZE - 1) 67 68 #define NPTEPG (NBPG/4) 69 70 #define NBSEG 0x400000 /* bytes/segment */ 71 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 72 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 73 74 #ifdef __LP64__ 75 #define KERNBASE 0xffffffff80000000L /* start of kernel virtual */ 76 #else 77 #define KERNBASE 0x80000000 /* start of kernel virtual */ 78 #endif 79 80 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 81 #define DEV_BSIZE (1 << DEV_BSHIFT) 82 #define BLKDEV_IOSIZE 2048 83 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 84 85 #ifdef __LP64__ 86 #define UPAGES 4 /* pages of u-area */ 87 #else 88 #define UPAGES 2 /* pages of u-area */ 89 #endif 90 91 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 92 #define USPACE_ALIGN (2*NBPG) /* u-area alignment 0-none */ 93 94 /* 95 * Constants related to network buffer management. 96 */ 97 #define NMBCLUSTERS 4096 /* map size, max cluster allocation */ 98 99 #define MSGBUFSIZE 8192 100 101 /* Default malloc arena size */ 102 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 103 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 104 105 /* pages ("clicks") (4096 bytes) to disk blocks */ 106 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 107 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 108 109 /* bytes to disk blocks */ 110 #define btodb(x) ((x) >> DEV_BSHIFT) 111 #define dbtob(x) ((x) << DEV_BSHIFT) 112 113 #ifdef _KERNEL 114 #ifndef _LOCORE 115 116 #define DELAY(n) delay(n) 117 void delay(int); 118 void nanodelay(int); 119 #endif 120 #endif /* !_KERNEL */ 121 122 #endif /* !_MIPS_PARAM_H_ */ 123