param.h revision 1.13
1 /* $NetBSD: param.h,v 1.13 1995/03/28 18:19:53 jtc Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratory. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. All advertising materials mentioning features or use of this software 25 * must display the following acknowledgement: 26 * This product includes software developed by the University of 27 * California, Berkeley and its contributors. 28 * 4. Neither the name of the University nor the names of its contributors 29 * may be used to endorse or promote products derived from this software 30 * without specific prior written permission. 31 * 32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 42 * SUCH DAMAGE. 43 * 44 * @(#)param.h 8.1 (Berkeley) 6/11/93 45 */ 46 47 /* 48 * Machine dependent constants for Sun-4c (SPARCstation) 49 */ 50 #define MACHINE "sparc" 51 #define MACHINE_ARCH "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 SUN4_PGSHIFT 13 /* for a sun4 machine */ 67 #define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */ 68 69 /* 70 * Three possible cases: 71 * sun4 only 8192 bytes/page 72 * sun4c/sun4m only 4096 bytes/page 73 * sun4/sun4c/sun4m either of the above 74 * 75 * In the later case NBPG, PGOFSET, and PGSHIFT are encoded in variables 76 * initialized early in locore.s. Since they are variables, rather than 77 * simple constants, the kernel will not perform slighly worse. 78 */ 79 #if defined(SUN4) && !defined(SUN4C) && !defined(SUN4M) 80 #define NBPG 8192 /* bytes/page */ 81 #define PGOFSET (NBPG-1) /* byte offset into page */ 82 #define PGSHIFT SUN4_PGSHIFT /* log2(NBPG) */ 83 #endif 84 #if !defined(SUN4) && (defined(SUN4C) || defined(SUN4M)) 85 #define NBPG 4096 /* bytes/page */ 86 #define PGOFSET (NBPG-1) /* byte offset into page */ 87 #define PGSHIFT SUN4CM_PGSHIFT /* log2(NBPG) */ 88 #endif 89 #if defined(SUN4) && (defined(SUN4C) || defined(SUN4M)) 90 #if defined(_KERNEL) && !defined(LOCORE) 91 extern int nbpg, pgofset, pgshift; 92 #endif 93 #define NBPG nbpg /* bytes/page */ 94 #define PGOFSET pgofset /* byte offset into page */ 95 #define PGSHIFT pgshift /* log2(NBPG) */ 96 #endif 97 98 #define KERNBASE 0xf8000000 /* start of kernel virtual space */ 99 #define KERNTEXTOFF 0xf8004000 /* start of kernel text */ 100 101 #define DEV_BSIZE 512 102 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 103 #define BLKDEV_IOSIZE 2048 104 #define MAXPHYS (64 * 1024) 105 106 #define CLSIZE 1 107 #define CLSIZELOG2 0 108 109 /* NOTE: SSIZE must be multiple of CLSIZE */ 110 #define SSIZE 1 /* initial stack size in pages */ 111 #define USPACE 8192 112 113 /* 114 * Constants related to network buffer management. 115 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 116 * on machines that exchange pages of input or output buffers with mbuf 117 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 118 * of the hardware page size. 119 */ 120 #define MSIZE 128 /* size of an mbuf */ 121 #define MCLBYTES 2048 /* enough for whole Ethernet packet */ 122 #define MCLSHIFT 11 /* log2(MCLBYTES) */ 123 #define MCLOFSET (MCLBYTES - 1) 124 125 #ifndef NMBCLUSTERS 126 #ifdef GATEWAY 127 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 128 #else 129 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 130 #endif 131 #endif 132 133 /* 134 * Size of kernel malloc arena in CLBYTES-sized logical pages. 135 */ 136 #ifndef NKMEMCLUSTERS 137 #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES) 138 #endif 139 140 /* pages ("clicks") (4096 bytes) to disk blocks */ 141 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 142 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 143 #define dtob(x) ((x) << DEV_BSHIFT) 144 145 /* pages to bytes */ 146 #define ctob(x) ((x) << PGSHIFT) 147 148 /* bytes to pages */ 149 #define btoc(x) (((unsigned)(x) + PGOFSET) >> PGSHIFT) 150 151 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 152 ((bytes) >> DEV_BSHIFT) 153 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 154 ((db) << DEV_BSHIFT) 155 156 /* 157 * Map a ``block device block'' to a file system block. 158 * This should be device dependent, and should use the bsize 159 * field from the disk label. 160 * For now though just use DEV_BSIZE. 161 */ 162 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 163 164 #ifdef _KERNEL 165 #ifndef LOCORE 166 #define DELAY(n) delay(n) 167 #endif 168 #else 169 #define DELAY(n) { register volatile int N = (n); while (--N > 0); } 170 #endif 171 172 #ifdef _KERNEL 173 extern int cputyp; 174 extern int cpumod; 175 #endif 176 /* 177 * Values for the cputyp variable. 178 */ 179 #define CPU_SUN4 0 180 #define CPU_SUN4C 1 181 #define CPU_SUN4M 2 182 /* 183 * Values for cpumod (cpu model) variable. XXX currently valid only for sun4 184 */ 185 #define SUN4_100 0x22 186 #define SUN4_200 0x21 187 #define SUN4_300 0x23 188 #define SUN4_400 0x24 189
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