1 /* $NetBSD: param.h,v 1.34 1996/03/04 05:04:40 cgd 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 #define ALIGNBYTES 3 63 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 64 65 #define NBPG 8192 /* bytes/page */ 66 #define PGOFSET (NBPG-1) /* byte offset into page */ 67 #define PGSHIFT 13 /* LOG2(NBPG) */ 68 69 #define NBSG 0x20000 /* bytes/segment */ 70 #define SEGOFSET (NBSG-1) /* byte offset into segment */ 71 #define SEGSHIFT 17 /* LOG2(NBSG) */ 72 73 #define KERNBASE 0x0E000000 /* start of kernel virtual */ 74 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 75 #define KERNTEXTOFF 0x0E004000 /* start of kernel text */ 76 77 #define DEV_BSIZE 512 78 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 79 #define BLKDEV_IOSIZE 2048 80 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 81 82 #define CLSIZE 1 83 #define CLSIZELOG2 0 84 85 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 86 #define SSIZE 1 /* initial stack size/NBPG */ 87 #define SINCR 1 /* increment of stack/NBPG */ 88 89 #define UPAGES 2 /* pages of u-area */ 90 #define USPACE (UPAGES << PGSHIFT) 91 92 /* 93 * Constants related to network buffer management. 94 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 95 * on machines that exchange pages of input or output buffers with mbuf 96 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 97 * of the hardware page size. 98 */ 99 #define MSIZE 128 /* size of an mbuf */ 100 #define MCLBYTES 2048 /* large enough for ether MTU */ 101 #define MCLSHIFT 11 102 #define MCLOFSET (MCLBYTES - 1) 103 #ifndef NMBCLUSTERS 104 #ifdef GATEWAY 105 #define NMBCLUSTERS 512 /* map size, max cluster allocation */ 106 #else 107 #define NMBCLUSTERS 256 /* map size, max cluster allocation */ 108 #endif 109 #endif 110 111 /* 112 * Size of kernel malloc arena in CLBYTES-sized logical pages 113 */ 114 #ifndef NKMEMCLUSTERS 115 #define NKMEMCLUSTERS (2048*1024/CLBYTES) 116 #endif 117 118 /* pages ("clicks") to disk blocks */ 119 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 120 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 121 122 /* pages to bytes */ 123 #define ctob(x) ((x) << PGSHIFT) 124 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 125 126 /* bytes to disk blocks */ 127 #define btodb(x) ((x) >> DEV_BSHIFT) 128 #define dbtob(x) ((x) << DEV_BSHIFT) 129 130 /* 131 * Map a ``block device block'' to a file system block. 132 * This should be device dependent, and should use the bsize 133 * field from the disk label. 134 * For now though just use DEV_BSIZE. 135 */ 136 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 137 138 /* 139 * Mach derived conversion macros 140 */ 141 #define sun3_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET) 142 #define sun3_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET) 143 #define sun3_btos(x) ((unsigned)(x) >> SEGSHIFT) 144 #define sun3_stob(x) ((unsigned)(x) << SEGSHIFT) 145 146 #define sun3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET) 147 #define sun3_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 148 #define sun3_btop(x) ((unsigned)(x) >> PGSHIFT) 149 #define sun3_ptob(x) ((unsigned)(x) << PGSHIFT) 150 151 /* XXX - Does this really belong here? -gwr */ 152 #include <machine/psl.h> 153 154 #if defined(_KERNEL) && !defined(_LOCORE) 155 extern void _delay __P((unsigned)); 156 #define delay(us) _delay((us)<<8) 157 #define DELAY(n) delay(n) 158 #endif /* _KERNEL && !_LOCORE */ 159 160 #endif /* MACHINE */ 161