1 /* $OpenBSD: param.h,v 1.6 2005/01/31 21:35:49 grange 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. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah Hdr: machparam.h 1.11 89/08/14 41 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 42 */ 43 44 #ifndef _MIPS_PARAM_H_ 45 #define _MIPS_PARAM_H_ 46 47 #ifdef _KERNEL 48 #ifdef _LOCORE 49 #include <machine/psl.h> 50 #else 51 #include <machine/cpu.h> 52 #endif 53 #endif 54 55 /* 56 * Round p (pointer or byte index) up to a correctly-aligned value for all 57 * data types (int, long, ...). The result is u_int and must be cast to 58 * any desired pointer type. 59 */ 60 #define ALIGNBYTES 7 61 #define ALIGN(p) (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES) 62 #define ALIGNED_POINTER(p, t) ((((u_long)(p)) & (sizeof (t) - 1)) == 0) 63 64 #define NBPG 4096 /* bytes/page */ 65 #define PGOFSET (NBPG-1) /* byte offset into page */ 66 #define PGSHIFT 12 /* LOG2(NBPG) */ 67 68 #define PAGE_SHIFT 12 69 #define PAGE_SIZE (1 << PAGE_SHIFT) 70 #define PAGE_MASK (PAGE_SIZE - 1) 71 72 #define NPTEPG (NBPG/4) 73 74 #define NBSEG 0x400000 /* bytes/segment */ 75 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 76 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 77 78 #ifdef __LP64__ 79 #define KERNBASE 0xffffffff80000000L /* start of kernel virtual */ 80 #else 81 #define KERNBASE 0x80000000 /* start of kernel virtual */ 82 #endif 83 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 84 85 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 86 #define DEV_BSIZE (1 << DEV_BSHIFT) 87 #define BLKDEV_IOSIZE 2048 88 /* XXX Maxphys temporary changed to 32K while SCSI driver is fixed. */ 89 #define MAXPHYS (32 * 1024) /* max raw I/O transfer size */ 90 91 #define SSIZE 1 /* initial stack size/NBPG */ 92 #define SINCR 1 /* increment of stack/NBPG */ 93 94 #ifdef __LP64__ 95 #define UPAGES 4 /* pages of u-area */ 96 #else 97 #define UPAGES 2 /* pages of u-area */ 98 #endif 99 100 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 101 #define USPACE_ALIGN (2*NBPG) /* u-area alignment 0-none */ 102 103 /* 104 * Constants related to network buffer management. 105 * MCLBYTES must be no larger than PAGE_SIZE (the software page size), and, 106 * on machines that exchange pages of input or output buffers with mbuf 107 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 108 * of the hardware page size. 109 */ 110 #define MSIZE 256 /* size of an mbuf */ 111 #define MCLSHIFT 11 112 #define MCLBYTES (1 << MCLSHIFT) /* enough for whole Ethernet packet */ 113 #define MCLOFSET (MCLBYTES - 1) 114 #ifndef NMBCLUSTERS 115 #define NMBCLUSTERS 4096 /* map size, max cluster allocation */ 116 #endif 117 118 #define MSGBUFSIZE 8192 119 120 /* Default malloc arena size */ 121 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 122 #define NKMEMPAGES_MAX_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT) 123 124 /* pages ("clicks") (4096 bytes) to disk blocks */ 125 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 126 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 127 128 /* pages to bytes */ 129 #define ctob(x) ((x) << PGSHIFT) 130 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 131 132 /* bytes to disk blocks */ 133 #define btodb(x) ((x) >> DEV_BSHIFT) 134 #define dbtob(x) ((x) << DEV_BSHIFT) 135 136 /* 137 * Map a ``block device block'' to a file system block. 138 * This should be device dependent, and should use the bsize 139 * field from the disk label. 140 * For now though just use DEV_BSIZE. 141 */ 142 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 143 144 /* 145 * Conversion macros 146 */ 147 #define mips_round_page(x) ((((u_long)(x)) + NBPG - 1) & ~(NBPG-1)) 148 #define mips_trunc_page(x) ((u_long)(x) & ~(NBPG-1)) 149 #define mips_btop(x) ((u_long)(x) >> PGSHIFT) 150 #define mips_ptob(x) ((u_long)(x) << PGSHIFT) 151 152 #ifdef _KERNEL 153 #ifndef _LOCORE 154 155 #define DELAY(n) delay(n) 156 void delay(int); 157 void nanodelay(int); 158 #endif 159 160 #else /* !_KERNEL */ 161 #define DELAY(n) { int N = (n); while (--N > 0); } 162 #endif /* !_KERNEL */ 163 164 #endif /* !_MIPS_PARAM_H_ */ 165