1 /* $NetBSD: param.h,v 1.40 1997/02/27 18:22:53 gwr Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995 Gordon W. Ross 5 * Copyright (c) 1993 Adam Glass 6 * Copyright (c) 1988 University of Utah. 7 * Copyright (c) 1982, 1986, 1990, 1993 8 * The Regents of the University of California. All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * the Systems Programming Group of the University of Utah Computer 12 * Science Department. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the University of 25 * California, Berkeley and its contributors. 26 * 4. Neither the name of the University nor the names of its contributors 27 * may be used to endorse or promote products derived from this software 28 * without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 * from: Utah Hdr: machparam.h 1.16 92/12/20 43 * from: @(#)param.h 8.1 (Berkeley) 6/10/93 44 */ 45 46 #ifndef MACHINE 47 48 /* 49 * Machine dependent constants for the Sun3 series. 50 */ 51 #define _MACHINE sun3 52 #define MACHINE "sun3" 53 #define _MACHINE_ARCH m68k 54 #define MACHINE_ARCH "m68k" 55 #define MID_MACHINE MID_M68K 56 57 /* 58 * Round p (pointer or byte index) up to a correctly-aligned value 59 * for all data types (int, long, ...). The result is u_int and 60 * must be cast to any desired pointer type. 61 * 62 * ALIGNED_POINTER is a boolean macro that checks whether an address 63 * is valid to fetch data elements of type t from on this architecture. 64 * This does not reflect the optimal alignment, just the possibility 65 * (within reasonable limits). 66 * 67 */ 68 #define ALIGNBYTES 3 69 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 70 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & ALIGNBYTES) == 0) 71 72 #define NBPG 8192 /* bytes/page */ 73 #define PGOFSET (NBPG-1) /* byte offset into page */ 74 #define PGSHIFT 13 /* LOG2(NBPG) */ 75 76 #define NBSG 0x20000 /* bytes/segment */ 77 #define SEGOFSET (NBSG-1) /* byte offset into segment */ 78 #define SEGSHIFT 17 /* LOG2(NBSG) */ 79 80 #define KERNBASE 0x0E000000 /* start of kernel virtual */ 81 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 82 #define KERNTEXTOFF 0x0E004000 /* start of kernel text */ 83 #define KERN_END 0x0FE00000 /* end of kernel virtual */ 84 85 #define DEV_BSIZE 512 86 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 87 #define BLKDEV_IOSIZE 2048 88 #define MAXPHYS 0x10000 /* max raw I/O transfer size */ 89 #define MAXBSIZE 0x8000 /* max FS block size - XXX */ 90 91 #define CLSIZE 1 92 #define CLSIZELOG2 0 93 94 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 95 #define SSIZE 1 /* initial stack size/NBPG */ 96 #define SINCR 1 /* increment of stack/NBPG */ 97 98 #define UPAGES 2 /* pages of u-area */ 99 #define USPACE (UPAGES << PGSHIFT) 100 101 /* 102 * Constants related to network buffer management. 103 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 104 * on machines that exchange pages of input or output buffers with mbuf 105 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 106 * of the hardware page size. 107 */ 108 #define MSIZE 128 /* size of an mbuf */ 109 110 #ifndef MCLSHIFT 111 # define MCLSHIFT 11 /* Makes MCLBYTES == 2048 */ 112 #endif /* MCLSHIFT */ 113 114 #define MCLBYTES (1 << MCLSHIFT) 115 #define MCLOFSET (MCLBYTES - 1) 116 117 #ifndef NMBCLUSTERS 118 #ifdef GATEWAY 119 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 120 #else 121 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 122 #endif 123 #endif 124 125 /* 126 * Size of kernel malloc arena in CLBYTES-sized logical pages 127 */ 128 #ifndef NKMEMCLUSTERS 129 #define NKMEMCLUSTERS (2048*1024/CLBYTES) 130 #endif 131 132 /* pages ("clicks") to disk blocks */ 133 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 134 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 135 136 /* pages to bytes */ 137 #define ctob(x) ((x) << PGSHIFT) 138 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 139 140 /* bytes to disk blocks */ 141 #define btodb(x) ((x) >> DEV_BSHIFT) 142 #define dbtob(x) ((x) << DEV_BSHIFT) 143 144 /* 145 * Map a ``block device block'' to a file system block. 146 * This should be device dependent, and should use the bsize 147 * field from the disk label. 148 * For now though just use DEV_BSIZE. 149 */ 150 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 151 152 /* XXX - Does this really belong here? -gwr */ 153 #include <machine/psl.h> 154 155 #if defined(_KERNEL) && !defined(_LOCORE) 156 extern void _delay __P((unsigned)); 157 #define delay(us) _delay((us)<<8) 158 #define DELAY(n) delay(n) 159 #endif /* _KERNEL && !_LOCORE */ 160 161 #endif /* MACHINE */ 162