1 /* $NetBSD: param.h,v 1.61 2003/08/07 16:29:40 agc 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. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * @(#)param.h 8.1 (Berkeley) 6/11/93 41 */ 42 /* 43 * Sun4M support by Aaron Brown, Harvard University. 44 * Changes Copyright (c) 1995 The President and Fellows of Harvard College. 45 * All rights reserved. 46 */ 47 #define _MACHINE sparc 48 #define MACHINE "sparc" 49 #define _MACHINE_ARCH sparc 50 #define MACHINE_ARCH "sparc" 51 #define MID_MACHINE MID_SPARC 52 53 #include <machine/cpuconf.h> /* XXX */ 54 #ifdef _KERNEL /* XXX */ 55 #ifndef _LOCORE /* XXX */ 56 #include <machine/cpu.h> /* XXX */ 57 #endif /* XXX */ 58 #endif /* XXX */ 59 60 /* 61 * Round p (pointer or byte index) up to a correctly-aligned value for 62 * the machine's strictest data type. The result is u_int and must be 63 * cast to any desired pointer type. 64 * 65 * ALIGNED_POINTER is a boolean macro that checks whether an address 66 * is valid to fetch data elements of type t from on this architecture. 67 * This does not reflect the optimal alignment, just the possibility 68 * (within reasonable limits). 69 * 70 */ 71 #define ALIGNBYTES 7 72 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 73 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 74 75 #define SUN4_PGSHIFT 13 /* for a sun4 machine */ 76 #define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */ 77 78 /* 79 * The following variables are always defined and initialized (in locore) 80 * so independently compiled modules (e.g. LKMs) can be used irrespective 81 * of the `options SUN4?' combination a particular kernel was configured with. 82 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 83 */ 84 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 85 extern int nbpg, pgofset, pgshift; 86 #endif 87 88 #define KERNBASE 0xf0000000 /* start of kernel virtual space */ 89 #define KERNEND 0xfe000000 /* end of kernel virtual space */ 90 /* Arbitrarily only use 1/4 of the kernel address space for buffers. */ 91 #define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4) 92 #define PROM_LOADADDR 0x00004000 /* where the prom loads us */ 93 #define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */ 94 95 #define DEV_BSIZE 512 96 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 97 #define BLKDEV_IOSIZE 2048 98 #define MAXPHYS (64 * 1024) 99 100 #define SSIZE 1 /* initial stack size in pages */ 101 #define USPACE 8192 102 103 /* 104 * Constants related to network buffer management. 105 * MCLBYTES must be no larger than NBPG (the software page size), and, 106 * on machines that exchange pages of input or output buffers with mbuf 107 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 108 * of the hardware page size. 109 */ 110 #define MSIZE 256 /* size of an mbuf */ 111 112 #ifndef MCLSHIFT 113 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 114 /* 2K cluster can hold Ether frame */ 115 #endif /* MCLSHIFT */ 116 117 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 118 119 #ifndef NMBCLUSTERS 120 #if defined(_KERNEL_OPT) 121 #include "opt_gateway.h" 122 #endif 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 /* 132 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 133 * logical pages. 134 */ 135 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 136 #define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 137 138 /* pages ("clicks") to disk blocks */ 139 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 140 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 141 142 /* pages to bytes */ 143 #define ctob(x) ((x) << PGSHIFT) 144 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 145 146 /* bytes to disk blocks */ 147 #define btodb(x) ((x) >> DEV_BSHIFT) 148 #define dbtob(x) ((x) << DEV_BSHIFT) 149 150 /* 151 * Map a ``block device block'' to a file system block. 152 * This should be device dependent, and should use the bsize 153 * field from the disk label. 154 * For now though just use DEV_BSIZE. 155 */ 156 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 157 158 #if defined(_KERNEL) || defined(_STANDALONE) 159 #ifndef _LOCORE 160 extern void delay __P((unsigned int)); 161 #define DELAY(n) delay(n) 162 #endif /* _LOCORE */ 163 164 /* 165 * microSPARC-IIep is a sun4m but with an integrated PCI controller. 166 * In a lot of places (like pmap &c) we want it to be treated as SUN4M. 167 * But since various low-level things are done very differently from 168 * normal sparcs (and since for now it requires a relocated kernel 169 * anyway), the MSIIEP kernels are not supposed to support any other 170 * system. So insist on SUN4M defined and SUN4 and SUN4C not defined. 171 */ 172 #if defined(MSIIEP) 173 #if defined(SUN4) || defined(SUN4C) || defined(SUN4D) 174 #error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d" 175 #endif 176 #if !defined(SUN4M) 177 #error "microSPARC-IIep kernel must have 'options SUN4M'" 178 #endif 179 #endif /* MSIIEP */ 180 181 /* 182 * Sun4 machines have a page size of 8192. All other machines have a page 183 * size of 4096. Short cut page size variables if we can. 184 */ 185 #if CPU_NTYPES != 0 && !defined(SUN4) 186 # define NBPG 4096 187 # define PGOFSET (NBPG-1) 188 # define PGSHIFT SUN4CM_PGSHIFT 189 #elif CPU_NTYPES == 1 && defined(SUN4) 190 # define NBPG 8192 191 # define PGOFSET (NBPG-1) 192 # define PGSHIFT SUN4_PGSHIFT 193 #else 194 # define NBPG nbpg 195 # define PGOFSET pgofset 196 # define PGSHIFT pgshift 197 #endif 198 199 #endif /* _KERNEL || _STANDALONE */ 200