1 /* $NetBSD: param.h,v 1.58 2003/01/18 06:44:57 thorpej 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_OPT 58 #include "opt_sparc_arch.h" 59 #endif 60 #ifdef _KERNEL /* XXX */ 61 #ifndef _LOCORE /* XXX */ 62 #include <machine/cpu.h> /* XXX */ 63 #endif /* XXX */ 64 #endif /* XXX */ 65 66 /* 67 * Round p (pointer or byte index) up to a correctly-aligned value for 68 * the machine's strictest data type. The result is u_int and must be 69 * cast to any desired pointer type. 70 * 71 * ALIGNED_POINTER is a boolean macro that checks whether an address 72 * is valid to fetch data elements of type t from on this architecture. 73 * This does not reflect the optimal alignment, just the possibility 74 * (within reasonable limits). 75 * 76 */ 77 #define ALIGNBYTES 7 78 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 79 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 80 81 #define SUN4_PGSHIFT 13 /* for a sun4 machine */ 82 #define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */ 83 84 /* 85 * The following variables are always defined and initialized (in locore) 86 * so independently compiled modules (e.g. LKMs) can be used irrespective 87 * of the `options SUN4?' combination a particular kernel was configured with. 88 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 89 */ 90 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 91 extern int nbpg, pgofset, pgshift; 92 #endif 93 94 #define KERNBASE 0xf0000000 /* start of kernel virtual space */ 95 #define KERNEND 0xfe000000 /* end of kernel virtual space */ 96 /* Arbitrarily only use 1/4 of the kernel address space for buffers. */ 97 #define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4) 98 #define PROM_LOADADDR 0x00004000 /* where the prom loads us */ 99 #define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* 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 SSIZE 1 /* initial stack size in pages */ 107 #define USPACE 8192 108 109 /* 110 * Constants related to network buffer management. 111 * MCLBYTES must be no larger than NBPG (the software page size), and, 112 * on machines that exchange pages of input or output buffers with mbuf 113 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 114 * of the hardware page size. 115 */ 116 #define MSIZE 256 /* size of an mbuf */ 117 118 #ifndef MCLSHIFT 119 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 120 /* 2K cluster can hold Ether frame */ 121 #endif /* MCLSHIFT */ 122 123 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 124 125 #ifndef NMBCLUSTERS 126 #if defined(_KERNEL_OPT) 127 #include "opt_gateway.h" 128 #endif 129 130 #ifdef GATEWAY 131 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 132 #else 133 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 134 #endif 135 #endif 136 137 /* 138 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 139 * logical pages. 140 */ 141 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 142 #define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 143 144 /* pages ("clicks") to disk blocks */ 145 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 146 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 147 148 /* pages to bytes */ 149 #define ctob(x) ((x) << PGSHIFT) 150 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 151 152 /* bytes to disk blocks */ 153 #define btodb(x) ((x) >> DEV_BSHIFT) 154 #define dbtob(x) ((x) << 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 /* 165 * Values for the cputyp variable. 166 */ 167 #define CPU_SUN4 0 168 #define CPU_SUN4C 1 169 #define CPU_SUN4M 2 170 #define CPU_SUN4U 3 171 #define CPU_SUN4D 4 172 173 #if defined(_KERNEL) || defined(_STANDALONE) 174 #ifndef _LOCORE 175 176 extern int cputyp; 177 178 extern void delay __P((unsigned int)); 179 #define DELAY(n) delay(n) 180 #endif /* _LOCORE */ 181 182 /* 183 * microSPARC-IIep is a sun4m but with an integrated PCI controller. 184 * In a lot of places (like pmap &c) we want it to be treated as SUN4M. 185 * But since various low-level things are done very differently from 186 * normal sparcs (and since for now it requires a relocated kernel 187 * anyway), the MSIIEP kernels are not supposed to support any other 188 * system. So insist on SUN4M defined and SUN4 and SUN4C not defined. 189 */ 190 #if defined(MSIIEP) 191 #if defined(SUN4) || defined(SUN4C) || defined(SUN4D) 192 #error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d" 193 #endif 194 #if !defined(SUN4M) 195 #error "microSPARC-IIep kernel must have 'options SUN4M'" 196 #endif 197 #endif /* MSIIEP */ 198 199 /* 200 * Shorthand CPU-type macros. Let compiler optimize away code 201 * conditional on constants. 202 */ 203 204 /* 205 * Step 1: Count the number of CPU types configured into the 206 * kernel. 207 */ 208 #define CPU_NTYPES (defined(SUN4) + defined(SUN4C) + \ 209 defined(SUN4M) + defined(SUN4D)) 210 211 /* 212 * Step 2: Define the CPU type predicates. Rules: 213 * 214 * * If CPU types are configured in, and the CPU type 215 * is not one of them, then the test is always false. 216 * 217 * * If exactly one CPU type is configured in, and it's 218 * this one, then the test is always true. 219 * 220 * * Otherwise, we have to reference the cputyp variable. 221 */ 222 #if CPU_NTYPES != 0 && !defined(SUN4) 223 # define CPU_ISSUN4 (0) 224 #elif CPU_NTYPES == 1 && defined(SUN4) 225 # define CPU_ISSUN4 (1) 226 #else 227 # define CPU_ISSUN4 (cputyp == CPU_SUN4) 228 #endif 229 230 #if CPU_NTYPES != 0 && !defined(SUN4C) 231 # define CPU_ISSUN4C (0) 232 #elif CPU_NTYPES == 1 && defined(SUN4C) 233 # define CPU_ISSUN4C (1) 234 #else 235 # define CPU_ISSUN4C (cputyp == CPU_SUN4C) 236 #endif 237 238 #if CPU_NTYPES != 0 && !defined(SUN4M) 239 # define CPU_ISSUN4M (0) 240 #elif CPU_NTYPES == 1 && defined(SUN4M) 241 # define CPU_ISSUN4M (1) 242 #else 243 # define CPU_ISSUN4M (cputyp == CPU_SUN4M) 244 #endif 245 246 #if CPU_NTYPES != 0 && !defined(SUN4D) 247 # define CPU_ISSUN4D (0) 248 #elif CPU_NTYPES == 1 && defined(SUN4D) 249 # define CPU_ISSUN4D (1) 250 #else 251 # define CPU_ISSUN4D (cputyp == CPU_SUN4D) 252 #endif 253 254 #define CPU_ISSUN4U (0) 255 256 /* 257 * Step 3: Sun4 machines have a page size of 8192. All other machines 258 * have a page size of 4096. Short cut page size variables if we can. 259 */ 260 #if CPU_NTYPES != 0 && !defined(SUN4) 261 # define NBPG 4096 262 # define PGOFSET (NBPG-1) 263 # define PGSHIFT SUN4CM_PGSHIFT 264 #elif CPU_NTYPES == 1 && defined(SUN4) 265 # define NBPG 8192 266 # define PGOFSET (NBPG-1) 267 # define PGSHIFT SUN4_PGSHIFT 268 #else 269 # define NBPG nbpg 270 # define PGOFSET pgofset 271 # define PGSHIFT pgshift 272 #endif 273 274 /* 275 * Step 4: Sun4M and Sun4D systems have an SRMMU. Define some 276 * short-hand for this. 277 */ 278 #define CPU_HAS_SRMMU (CPU_ISSUN4M || CPU_ISSUN4D) 279 280 #endif /* _KERNEL || _STANDALONE */ 281