1 /* $NetBSD: param.h,v 1.36 1998/08/23 10:08:25 pk 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(_LOCORE) 88 extern int nbpg, pgofset, pgshift; 89 #endif 90 91 #define KERNBASE 0xf0000000 /* start of kernel virtual space */ 92 #define KERNTEXTOFF (KERNBASE+0x4000) /* start of kernel text */ 93 94 #define DEV_BSIZE 512 95 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 96 #define BLKDEV_IOSIZE 2048 97 #define MAXPHYS (64 * 1024) 98 99 #define CLSIZE 1 100 #define CLSIZELOG2 0 101 102 /* NOTE: SSIZE must be multiple of CLSIZE */ 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 CLBYTES (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 128 /* 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 #ifndef NMBCLUSTERS 119 120 #if defined(_KERNEL) && !defined(_LKM) 121 #include "opt_gateway.h" 122 #endif /* _KERNEL && ! _LKM */ 123 124 #ifdef GATEWAY 125 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 126 #else 127 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 128 #endif 129 #endif 130 131 #define MSGBUFSIZE 4096 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") to disk blocks */ 141 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 142 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 143 144 /* pages to bytes */ 145 #define ctob(x) ((x) << PGSHIFT) 146 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 147 148 /* bytes to disk blocks */ 149 #define btodb(x) ((x) >> DEV_BSHIFT) 150 #define dbtob(x) ((x) << DEV_BSHIFT) 151 152 /* 153 * Map a ``block device block'' to a file system block. 154 * This should be device dependent, and should use the bsize 155 * field from the disk label. 156 * For now though just use DEV_BSIZE. 157 */ 158 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 159 160 /* 161 * dvmamap manages a range of DVMA addresses intended to create double 162 * mappings of physical memory. In a way, `dvmamap' is a submap of the 163 * VM map `phys_map'. The difference is the use of the `resource map' 164 * routines to manage page allocation, allowing DVMA addresses to be 165 * allocated and freed from within interrupt routines. 166 * 167 * Note that `phys_map' can still be used to allocate memory-backed pages 168 * in DVMA space. 169 */ 170 #ifdef _KERNEL 171 #ifndef _LOCORE 172 173 extern void delay __P((unsigned int)); 174 #define DELAY(n) delay(n) 175 176 extern int cputyp; 177 178 #endif /* _LOCORE */ 179 #endif /* _KERNEL */ 180 181 /* 182 * Values for the cputyp variable. 183 */ 184 #define CPU_SUN4 0 185 #define CPU_SUN4C 1 186 #define CPU_SUN4M 2 187 188 /* 189 * Shorthand CPU-type macros. Enumerate all eight cases. 190 * Let compiler optimize away code conditional on constants. 191 * 192 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m 193 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below, 194 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized 195 * early in locore.s after the machine type has been detected. 196 * 197 * Note that whenever the macros defined below evaluate to expressions 198 * involving variables, the kernel will perform slighly worse due to the 199 * extra memory references they'll generate. 200 */ 201 #if defined(SUN4M) && defined(SUN4C) && defined(SUN4) 202 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 203 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 204 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 205 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C) 206 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 207 # define NBPG nbpg 208 # define PGOFSET pgofset 209 # define PGSHIFT pgshift 210 #elif defined(SUN4M) && defined(SUN4C) && !defined(SUN4) 211 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 212 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 213 # define CPU_ISSUN4 (0) 214 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4C) 215 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 216 # define NBPG 4096 217 # define PGOFSET (NBPG-1) 218 # define PGSHIFT SUN4CM_PGSHIFT 219 #elif defined(SUN4M) && !defined(SUN4C) && defined(SUN4) 220 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 221 # define CPU_ISSUN4C (0) 222 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 223 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4) 224 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4M) 225 # define NBPG nbpg 226 # define PGOFSET pgofset 227 # define PGSHIFT pgshift 228 #elif defined(SUN4M) && !defined(SUN4C) && !defined(SUN4) 229 # define CPU_ISSUN4M (1) 230 # define CPU_ISSUN4C (0) 231 # define CPU_ISSUN4 (0) 232 # define CPU_ISSUN4OR4C (0) 233 # define CPU_ISSUN4COR4M (1) 234 # define NBPG 4096 235 # define PGOFSET (NBPG-1) 236 # define PGSHIFT SUN4CM_PGSHIFT 237 #elif !defined(SUN4M) && defined(SUN4C) && defined(SUN4) 238 # define CPU_ISSUN4M (0) 239 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 240 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 241 # define CPU_ISSUN4OR4C (1) 242 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C) 243 # define NBPG nbpg 244 # define PGOFSET pgofset 245 # define PGSHIFT pgshift 246 #elif !defined(SUN4M) && defined(SUN4C) && !defined(SUN4) 247 # define CPU_ISSUN4M (0) 248 # define CPU_ISSUN4C (1) 249 # define CPU_ISSUN4 (0) 250 # define CPU_ISSUN4OR4C (1) 251 # define CPU_ISSUN4COR4M (1) 252 # define NBPG 4096 253 # define PGOFSET (NBPG-1) 254 # define PGSHIFT SUN4CM_PGSHIFT 255 #elif !defined(SUN4M) && !defined(SUN4C) && defined(SUN4) 256 # define CPU_ISSUN4M (0) 257 # define CPU_ISSUN4C (0) 258 # define CPU_ISSUN4 (1) 259 # define CPU_ISSUN4OR4C (1) 260 # define CPU_ISSUN4COR4M (0) 261 # define NBPG 8192 262 # define PGOFSET (NBPG-1) 263 # define PGSHIFT SUN4_PGSHIFT 264 #elif !defined(SUN4M) && !defined(SUN4C) && !defined(SUN4) 265 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 266 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 267 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 268 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C) 269 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 270 # define NBPG nbpg 271 # define PGOFSET pgofset 272 # define PGSHIFT pgshift 273 #endif 274