1 /* $NetBSD: param.h,v 1.48 2001/05/30 12:28:50 mrg 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 * Sun4M support by Aaron Brown, Harvard University. 48 * Changes Copyright (c) 1995 The President and Fellows of Harvard College. 49 * All rights reserved. 50 */ 51 #define _MACHINE sparc 52 #define MACHINE "sparc" 53 #define _MACHINE_ARCH sparc 54 #define MACHINE_ARCH "sparc" 55 #define MID_MACHINE MID_SPARC 56 57 #ifdef _KERNEL /* XXX */ 58 #ifndef _LOCORE /* XXX */ 59 #include <machine/cpu.h> /* XXX */ 60 #endif /* XXX */ 61 #endif /* XXX */ 62 63 /* 64 * Round p (pointer or byte index) up to a correctly-aligned value for 65 * the machine's strictest data type. The result is u_int and must be 66 * cast to any desired pointer type. 67 * 68 * ALIGNED_POINTER is a boolean macro that checks whether an address 69 * is valid to fetch data elements of type t from on this architecture. 70 * This does not reflect the optimal alignment, just the possibility 71 * (within reasonable limits). 72 * 73 */ 74 #define ALIGNBYTES 7 75 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 76 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 77 78 #define SUN4_PGSHIFT 13 /* for a sun4 machine */ 79 #define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */ 80 81 /* 82 * The following variables are always defined and initialized (in locore) 83 * so independently compiled modules (e.g. LKMs) can be used irrespective 84 * of the `options SUN4?' combination a particular kernel was configured with. 85 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 86 */ 87 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 88 extern int nbpg, pgofset, pgshift; 89 #endif 90 91 #define KERNBASE 0xf0000000 /* start of kernel virtual space */ 92 #define KERNEND 0xfe000000 /* end of kernel virtual space */ 93 /* Arbitrarily only use 1/4 of the kernel address space for buffers. */ 94 #define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4) 95 #define PROM_LOADADDR 0x00004000 /* where the prom loads us */ 96 #define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */ 97 98 #define DEV_BSIZE 512 99 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 100 #define BLKDEV_IOSIZE 2048 101 #define MAXPHYS (64 * 1024) 102 103 #define SSIZE 1 /* initial stack size in pages */ 104 #define USPACE 8192 105 106 /* 107 * Constants related to network buffer management. 108 * MCLBYTES must be no larger than NBPG (the software page size), and, 109 * on machines that exchange pages of input or output buffers with mbuf 110 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 111 * of the hardware page size. 112 */ 113 #define MSIZE 256 /* size of an mbuf */ 114 #define MCLBYTES 2048 /* enough for whole Ethernet packet */ 115 #define MCLSHIFT 11 /* log2(MCLBYTES) */ 116 #define MCLOFSET (MCLBYTES - 1) 117 118 #if defined(_KERNEL_OPT) 119 #include "opt_gateway.h" 120 #endif 121 122 #ifndef NMBCLUSTERS 123 #ifdef GATEWAY 124 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 125 #else 126 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 127 #endif 128 #endif 129 130 /* 131 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 132 * logical pages. 133 */ 134 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 135 #define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 136 137 /* pages ("clicks") to disk blocks */ 138 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 139 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 140 141 /* pages to bytes */ 142 #define ctob(x) ((x) << PGSHIFT) 143 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 144 145 /* bytes to disk blocks */ 146 #define btodb(x) ((x) >> DEV_BSHIFT) 147 #define dbtob(x) ((x) << DEV_BSHIFT) 148 149 /* 150 * Map a ``block device block'' to a file system block. 151 * This should be device dependent, and should use the bsize 152 * field from the disk label. 153 * For now though just use DEV_BSIZE. 154 */ 155 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 156 157 /* 158 * Values for the cputyp variable. 159 */ 160 #define CPU_SUN4 0 161 #define CPU_SUN4C 1 162 #define CPU_SUN4M 2 163 #define CPU_SUN4U 3 164 165 #if defined(_KERNEL) || defined(_STANDALONE) 166 #ifndef _LOCORE 167 168 extern int cputyp; 169 170 extern void delay __P((unsigned int)); 171 #define DELAY(n) delay(n) 172 #endif /* _LOCORE */ 173 174 /* 175 * Shorthand CPU-type macros. Enumerate all eight cases. 176 * Let compiler optimize away code conditional on constants. 177 * 178 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m 179 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below, 180 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized 181 * early in locore.s after the machine type has been detected. 182 * 183 * Note that whenever the macros defined below evaluate to expressions 184 * involving variables, the kernel will perform slighly worse due to the 185 * extra memory references they'll generate. 186 */ 187 #define CPU_ISSUN4U (0) 188 #define CPU_ISSUN4MOR4U (CPU_ISSUN4M) 189 #if defined(SUN4M) && defined(SUN4C) && defined(SUN4) 190 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 191 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 192 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 193 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C) 194 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 195 # define NBPG nbpg 196 # define PGOFSET pgofset 197 # define PGSHIFT pgshift 198 #elif defined(SUN4M) && defined(SUN4C) && !defined(SUN4) 199 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 200 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 201 # define CPU_ISSUN4 (0) 202 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4C) 203 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 204 # define NBPG 4096 205 # define PGOFSET (NBPG-1) 206 # define PGSHIFT SUN4CM_PGSHIFT 207 #elif defined(SUN4M) && !defined(SUN4C) && defined(SUN4) 208 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 209 # define CPU_ISSUN4C (0) 210 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 211 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4) 212 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4M) 213 # define NBPG nbpg 214 # define PGOFSET pgofset 215 # define PGSHIFT pgshift 216 #elif defined(SUN4M) && !defined(SUN4C) && !defined(SUN4) 217 # define CPU_ISSUN4M (1) 218 # define CPU_ISSUN4C (0) 219 # define CPU_ISSUN4 (0) 220 # define CPU_ISSUN4OR4C (0) 221 # define CPU_ISSUN4COR4M (1) 222 # define NBPG 4096 223 # define PGOFSET (NBPG-1) 224 # define PGSHIFT SUN4CM_PGSHIFT 225 #elif !defined(SUN4M) && defined(SUN4C) && defined(SUN4) 226 # define CPU_ISSUN4M (0) 227 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 228 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 229 # define CPU_ISSUN4OR4C (1) 230 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C) 231 # define NBPG nbpg 232 # define PGOFSET pgofset 233 # define PGSHIFT pgshift 234 #elif !defined(SUN4M) && defined(SUN4C) && !defined(SUN4) 235 # define CPU_ISSUN4M (0) 236 # define CPU_ISSUN4C (1) 237 # define CPU_ISSUN4 (0) 238 # define CPU_ISSUN4OR4C (1) 239 # define CPU_ISSUN4COR4M (1) 240 # define NBPG 4096 241 # define PGOFSET (NBPG-1) 242 # define PGSHIFT SUN4CM_PGSHIFT 243 #elif !defined(SUN4M) && !defined(SUN4C) && defined(SUN4) 244 # define CPU_ISSUN4M (0) 245 # define CPU_ISSUN4C (0) 246 # define CPU_ISSUN4 (1) 247 # define CPU_ISSUN4OR4C (1) 248 # define CPU_ISSUN4COR4M (0) 249 # define NBPG 8192 250 # define PGOFSET (NBPG-1) 251 # define PGSHIFT SUN4_PGSHIFT 252 #elif !defined(SUN4M) && !defined(SUN4C) && !defined(SUN4) 253 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 254 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 255 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 256 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C) 257 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 258 # define NBPG nbpg 259 # define PGOFSET pgofset 260 # define PGSHIFT pgshift 261 #endif 262 #endif /* _KERNEL || _STANDALONE */ 263