1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/11/93 43 * 44 * from: Header: param.h,v 1.13 92/11/26 02:04:38 torek Exp (LBL) 45 * $Id: param.h,v 1.1 1993/10/02 10:23:16 deraadt Exp $ 46 */ 47 48 /* 49 * Machine dependent constants for Sun-4c (SPARCstation) 50 */ 51 #define MACHINE "sparc" 52 53 #ifdef KERNEL /* XXX */ 54 #include <machine/cpu.h> /* XXX */ 55 #endif /* XXX */ 56 57 /* 58 * Round p (pointer or byte index) up to a correctly-aligned value for 59 * the machine's strictest data type. The result is u_int and must be 60 * cast to any desired pointer type. 61 */ 62 #define ALIGNBYTES 7 63 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 64 65 #define NBPG 4096 /* bytes/page */ 66 #define PGOFSET (NBPG-1) /* byte offset into page */ 67 #define PGSHIFT 12 /* log2(NBPG) */ 68 69 #define KERNBASE 0xf8000000 /* start of kernel virtual space */ 70 #define KERNTEXTOFF 0xf8004000 /* start of kernel text */ 71 #define BTOPKERNBASE ((u_long)KERNBASE >> PG_SHIFT) 72 73 #define DEV_BSIZE 512 74 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 75 #define BLKDEV_IOSIZE 2048 76 #define MAXPHYS (64 * 1024) 77 78 #define CLSIZE 1 79 #define CLSIZELOG2 0 80 81 /* NOTE: SSIZE and UPAGES must be multiples of CLSIZE */ 82 #define SSIZE 1 /* initial stack size/NBPG */ 83 #define UPAGES 2 /* pages of u-area */ 84 85 /* 86 * Constants related to network buffer management. 87 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 88 * on machines that exchange pages of input or output buffers with mbuf 89 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 90 * of the hardware page size. 91 */ 92 #define MSIZE 128 /* size of an mbuf */ 93 #define MCLBYTES 2048 /* enough for whole Ethernet packet */ 94 #define MCLSHIFT 11 /* log2(MCLBYTES) */ 95 #define MCLOFSET (MCLBYTES - 1) 96 97 #ifndef NMBCLUSTERS 98 #ifdef GATEWAY 99 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 100 #else 101 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 102 #endif 103 #endif 104 105 /* 106 * Size of kernel malloc arena in CLBYTES-sized logical pages. 107 */ 108 #ifndef NKMEMCLUSTERS 109 #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES) 110 #endif 111 112 /* pages ("clicks") (4096 bytes) to disk blocks */ 113 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 114 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 115 #define dtob(x) ((x) << DEV_BSHIFT) 116 117 /* pages to bytes */ 118 #define ctob(x) ((x) << PGSHIFT) 119 120 /* bytes to pages */ 121 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 122 123 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 124 ((unsigned)(bytes) >> DEV_BSHIFT) 125 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 126 ((unsigned)(db) << DEV_BSHIFT) 127 128 /* 129 * Map a ``block device block'' to a file system block. 130 * This should be device dependent, and should use the bsize 131 * field from the disk label. 132 * For now though just use DEV_BSIZE. 133 */ 134 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 135 136 #ifdef KERNEL 137 #ifndef LOCORE 138 #define DELAY(n) delay(n) 139 #endif 140 #else 141 #define DELAY(n) { register volatile int N = (n); while (--N > 0); } 142 #endif 143