1 /* $NetBSD: param.h,v 1.60 2003/04/11 13:55:24 jdc 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 #include <machine/cpuconf.h> /* XXX */ 58 #ifdef _KERNEL /* XXX */ 59 #ifndef _LOCORE /* XXX */ 60 #include <machine/cpu.h> /* XXX */ 61 #endif /* XXX */ 62 #endif /* XXX */ 63 64 /* 65 * Round p (pointer or byte index) up to a correctly-aligned value for 66 * the machine's strictest data type. The result is u_int and must be 67 * cast to any desired pointer type. 68 * 69 * ALIGNED_POINTER is a boolean macro that checks whether an address 70 * is valid to fetch data elements of type t from on this architecture. 71 * This does not reflect the optimal alignment, just the possibility 72 * (within reasonable limits). 73 * 74 */ 75 #define ALIGNBYTES 7 76 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES) 77 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 78 79 #define SUN4_PGSHIFT 13 /* for a sun4 machine */ 80 #define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */ 81 82 /* 83 * The following variables are always defined and initialized (in locore) 84 * so independently compiled modules (e.g. LKMs) can be used irrespective 85 * of the `options SUN4?' combination a particular kernel was configured with. 86 * See also the definitions of NBPG, PGOFSET and PGSHIFT below. 87 */ 88 #if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE) 89 extern int nbpg, pgofset, pgshift; 90 #endif 91 92 #define KERNBASE 0xf0000000 /* start of kernel virtual space */ 93 #define KERNEND 0xfe000000 /* end of kernel virtual space */ 94 /* Arbitrarily only use 1/4 of the kernel address space for buffers. */ 95 #define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4) 96 #define PROM_LOADADDR 0x00004000 /* where the prom loads us */ 97 #define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */ 98 99 #define DEV_BSIZE 512 100 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 101 #define BLKDEV_IOSIZE 2048 102 #define MAXPHYS (64 * 1024) 103 104 #define SSIZE 1 /* initial stack size in pages */ 105 #define USPACE 8192 106 107 /* 108 * Constants related to network buffer management. 109 * MCLBYTES must be no larger than NBPG (the software page size), and, 110 * on machines that exchange pages of input or output buffers with mbuf 111 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 112 * of the hardware page size. 113 */ 114 #define MSIZE 256 /* size of an mbuf */ 115 116 #ifndef MCLSHIFT 117 #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 118 /* 2K cluster can hold Ether frame */ 119 #endif /* MCLSHIFT */ 120 121 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 122 123 #ifndef NMBCLUSTERS 124 #if defined(_KERNEL_OPT) 125 #include "opt_gateway.h" 126 #endif 127 128 #ifdef GATEWAY 129 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 130 #else 131 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 132 #endif 133 #endif 134 135 /* 136 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 137 * logical pages. 138 */ 139 #define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 140 #define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT) 141 142 /* pages ("clicks") to disk blocks */ 143 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 144 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 145 146 /* pages to bytes */ 147 #define ctob(x) ((x) << PGSHIFT) 148 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 149 150 /* bytes to disk blocks */ 151 #define btodb(x) ((x) >> DEV_BSHIFT) 152 #define dbtob(x) ((x) << DEV_BSHIFT) 153 154 /* 155 * Map a ``block device block'' to a file system block. 156 * This should be device dependent, and should use the bsize 157 * field from the disk label. 158 * For now though just use DEV_BSIZE. 159 */ 160 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 161 162 #if defined(_KERNEL) || defined(_STANDALONE) 163 #ifndef _LOCORE 164 extern void delay __P((unsigned int)); 165 #define DELAY(n) delay(n) 166 #endif /* _LOCORE */ 167 168 /* 169 * microSPARC-IIep is a sun4m but with an integrated PCI controller. 170 * In a lot of places (like pmap &c) we want it to be treated as SUN4M. 171 * But since various low-level things are done very differently from 172 * normal sparcs (and since for now it requires a relocated kernel 173 * anyway), the MSIIEP kernels are not supposed to support any other 174 * system. So insist on SUN4M defined and SUN4 and SUN4C not defined. 175 */ 176 #if defined(MSIIEP) 177 #if defined(SUN4) || defined(SUN4C) || defined(SUN4D) 178 #error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d" 179 #endif 180 #if !defined(SUN4M) 181 #error "microSPARC-IIep kernel must have 'options SUN4M'" 182 #endif 183 #endif /* MSIIEP */ 184 185 /* 186 * Sun4 machines have a page size of 8192. All other machines have a page 187 * size of 4096. Short cut page size variables if we can. 188 */ 189 #if CPU_NTYPES != 0 && !defined(SUN4) 190 # define NBPG 4096 191 # define PGOFSET (NBPG-1) 192 # define PGSHIFT SUN4CM_PGSHIFT 193 #elif CPU_NTYPES == 1 && defined(SUN4) 194 # define NBPG 8192 195 # define PGOFSET (NBPG-1) 196 # define PGSHIFT SUN4_PGSHIFT 197 #else 198 # define NBPG nbpg 199 # define PGOFSET pgofset 200 # define PGSHIFT pgshift 201 #endif 202 203 #endif /* _KERNEL || _STANDALONE */ 204