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 1.3 1993/12/03 09:23:43 deraadt Exp $ 46 */ 47 48 /* 49 * Machine dependent constants for Sun-4c (SPARCstation) 50 */ 51 #define MACHINE "sparc" 52 #define MID_MACHINE MID_SPARC 53 54 #ifdef KERNEL /* XXX */ 55 #include <machine/cpu.h> /* XXX */ 56 #endif /* XXX */ 57 58 /* 59 * Round p (pointer or byte index) up to a correctly-aligned value for 60 * the machine's strictest data type. The result is u_int and must be 61 * cast to any desired pointer type. 62 */ 63 #define ALIGNBYTES 7 64 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 65 66 #define NBPG 4096 /* bytes/page */ 67 #define PGOFSET (NBPG-1) /* byte offset into page */ 68 #define PGSHIFT 12 /* log2(NBPG) */ 69 70 #define KERNBASE 0xf8000000 /* start of kernel virtual space */ 71 #define KERNTEXTOFF 0xf8004000 /* start of kernel text */ 72 #define BTOPKERNBASE ((u_long)KERNBASE >> PG_SHIFT) 73 74 #define DEV_BSIZE 512 75 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 76 #define BLKDEV_IOSIZE 2048 77 #define MAXPHYS (64 * 1024) 78 79 #define CLSIZE 1 80 #define CLSIZELOG2 0 81 82 /* NOTE: SSIZE and UPAGES must be multiples of CLSIZE */ 83 #define SSIZE 1 /* initial stack size/NBPG */ 84 #define UPAGES 6 /* pages of u-area */ 85 86 /* 87 * Constants related to network buffer management. 88 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 89 * on machines that exchange pages of input or output buffers with mbuf 90 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 91 * of the hardware page size. 92 */ 93 #define MSIZE 128 /* size of an mbuf */ 94 #define MCLBYTES 2048 /* enough for whole Ethernet packet */ 95 #define MCLSHIFT 11 /* log2(MCLBYTES) */ 96 #define MCLOFSET (MCLBYTES - 1) 97 98 #ifndef NMBCLUSTERS 99 #ifdef GATEWAY 100 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 101 #else 102 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 103 #endif 104 #endif 105 106 /* 107 * Size of kernel malloc arena in CLBYTES-sized logical pages. 108 */ 109 #ifndef NKMEMCLUSTERS 110 #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES) 111 #endif 112 113 /* pages ("clicks") (4096 bytes) to disk blocks */ 114 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 115 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 116 #define dtob(x) ((x) << DEV_BSHIFT) 117 118 /* pages to bytes */ 119 #define ctob(x) ((x) << PGSHIFT) 120 121 /* bytes to pages */ 122 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 123 124 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 125 ((unsigned)(bytes) >> DEV_BSHIFT) 126 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 127 ((unsigned)(db) << DEV_BSHIFT) 128 129 /* 130 * Map a ``block device block'' to a file system block. 131 * This should be device dependent, and should use the bsize 132 * field from the disk label. 133 * For now though just use DEV_BSIZE. 134 */ 135 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 136 137 #ifdef KERNEL 138 #ifndef LOCORE 139 #define DELAY(n) delay(n) 140 #endif 141 #else 142 #define DELAY(n) { register volatile int N = (n); while (--N > 0); } 143 #endif 144