1 /* $NetBSD: param.h,v 1.44 2000/05/22 02:35:23 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 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 #if defined(_KERNEL) && !defined(_LKM) 119 #include "opt_gateway.h" 120 #endif /* _KERNEL && ! _LKM */ 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 #define MSGBUFSIZE 4096 131 132 /* 133 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 134 * logical pages. 135 */ 136 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 137 #define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 138 139 /* pages ("clicks") to disk blocks */ 140 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 141 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 142 143 /* pages to bytes */ 144 #define ctob(x) ((x) << PGSHIFT) 145 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 146 147 /* bytes to disk blocks */ 148 #define btodb(x) ((x) >> DEV_BSHIFT) 149 #define dbtob(x) ((x) << DEV_BSHIFT) 150 151 /* 152 * Map a ``block device block'' to a file system block. 153 * This should be device dependent, and should use the bsize 154 * field from the disk label. 155 * For now though just use DEV_BSIZE. 156 */ 157 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 158 159 /* 160 * dvmamap manages a range of DVMA addresses intended to create double 161 * mappings of physical memory. In a way, `dvmamap' is a submap of the 162 * VM map `phys_map'. The difference is the use of the `resource map' 163 * routines to manage page allocation, allowing DVMA addresses to be 164 * allocated and freed from within interrupt routines. 165 * 166 * Note that `phys_map' can still be used to allocate memory-backed pages 167 * in DVMA space. 168 */ 169 #if defined(_KERNEL) || defined(_STANDALONE) 170 #ifndef _LOCORE 171 172 extern void delay __P((unsigned int)); 173 #define DELAY(n) delay(n) 174 175 extern int cputyp; 176 177 #endif /* _LOCORE */ 178 #endif /* _KERNEL */ 179 180 /* 181 * Values for the cputyp variable. 182 */ 183 #define CPU_SUN4 0 184 #define CPU_SUN4C 1 185 #define CPU_SUN4M 2 186 #define CPU_SUN4U 3 187 188 /* 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 #define CPU_ISSUN4U (0) 202 #define CPU_ISSUN4MOR4U (CPU_ISSUN4M) 203 #if defined(SUN4M) && defined(SUN4C) && defined(SUN4) 204 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 205 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 206 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 207 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C) 208 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 209 # define NBPG nbpg 210 # define PGOFSET pgofset 211 # define PGSHIFT pgshift 212 #elif defined(SUN4M) && defined(SUN4C) && !defined(SUN4) 213 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 214 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 215 # define CPU_ISSUN4 (0) 216 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4C) 217 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 218 # define NBPG 4096 219 # define PGOFSET (NBPG-1) 220 # define PGSHIFT SUN4CM_PGSHIFT 221 #elif defined(SUN4M) && !defined(SUN4C) && defined(SUN4) 222 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 223 # define CPU_ISSUN4C (0) 224 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 225 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4) 226 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4M) 227 # define NBPG nbpg 228 # define PGOFSET pgofset 229 # define PGSHIFT pgshift 230 #elif defined(SUN4M) && !defined(SUN4C) && !defined(SUN4) 231 # define CPU_ISSUN4M (1) 232 # define CPU_ISSUN4C (0) 233 # define CPU_ISSUN4 (0) 234 # define CPU_ISSUN4OR4C (0) 235 # define CPU_ISSUN4COR4M (1) 236 # define NBPG 4096 237 # define PGOFSET (NBPG-1) 238 # define PGSHIFT SUN4CM_PGSHIFT 239 #elif !defined(SUN4M) && defined(SUN4C) && defined(SUN4) 240 # define CPU_ISSUN4M (0) 241 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 242 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 243 # define CPU_ISSUN4OR4C (1) 244 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C) 245 # define NBPG nbpg 246 # define PGOFSET pgofset 247 # define PGSHIFT pgshift 248 #elif !defined(SUN4M) && defined(SUN4C) && !defined(SUN4) 249 # define CPU_ISSUN4M (0) 250 # define CPU_ISSUN4C (1) 251 # define CPU_ISSUN4 (0) 252 # define CPU_ISSUN4OR4C (1) 253 # define CPU_ISSUN4COR4M (1) 254 # define NBPG 4096 255 # define PGOFSET (NBPG-1) 256 # define PGSHIFT SUN4CM_PGSHIFT 257 #elif !defined(SUN4M) && !defined(SUN4C) && defined(SUN4) 258 # define CPU_ISSUN4M (0) 259 # define CPU_ISSUN4C (0) 260 # define CPU_ISSUN4 (1) 261 # define CPU_ISSUN4OR4C (1) 262 # define CPU_ISSUN4COR4M (0) 263 # define NBPG 8192 264 # define PGOFSET (NBPG-1) 265 # define PGSHIFT SUN4_PGSHIFT 266 #elif !defined(SUN4M) && !defined(SUN4C) && !defined(SUN4) 267 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 268 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 269 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 270 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C) 271 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M) 272 # define NBPG nbpg 273 # define PGOFSET pgofset 274 # define PGSHIFT pgshift 275 #endif 276