param.h revision 1.6
1/* $NetBSD: param.h,v 1.6 1994/10/26 21:09:47 cgd Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. 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 * from: Utah Hdr: machparam.h 1.11 89/08/14 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45/* 46 * Machine dependent constants for DEC Station 3100. 47 */ 48#define MACHINE "pmax" 49#define MACHINE_ARCH "mips" 50#define MID_MACHINE MID_PMAX 51 52/* 53 * Round p (pointer or byte index) up to a correctly-aligned value for all 54 * data types (int, long, ...). The result is u_int and must be cast to 55 * any desired pointer type. 56 */ 57#define ALIGNBYTES 7 58#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 59 60#define NBPG 4096 /* bytes/page */ 61#define PGOFSET (NBPG-1) /* byte offset into page */ 62#define PGSHIFT 12 /* LOG2(NBPG) */ 63#define NPTEPG (NBPG/4) 64 65#define NBSEG 0x400000 /* bytes/segment */ 66#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 67#define SEGSHIFT 22 /* LOG2(NBSEG) */ 68 69#define KERNBASE 0x80000000 /* start of kernel virtual */ 70#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 71 72#define DEV_BSIZE 512 73#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 74#define BLKDEV_IOSIZE 2048 75#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 76 77#define CLSIZE 1 78#define CLSIZELOG2 0 79 80/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */ 81#define SSIZE 1 /* initial stack size/NBPG */ 82#define SINCR 1 /* increment of stack/NBPG */ 83 84#define UPAGES 2 /* pages of u-area */ 85#define UADDR 0xffffd000 /* address of u */ 86#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 87#define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 88#define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 89 90/* 91 * Constants related to network buffer management. 92 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 93 * on machines that exchange pages of input or output buffers with mbuf 94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 95 * of the hardware page size. 96 */ 97#define MSIZE 128 /* size of an mbuf */ 98#define MCLBYTES 1024 99#define MCLSHIFT 10 100#define MCLOFSET (MCLBYTES - 1) 101#ifndef NMBCLUSTERS 102#ifdef GATEWAY 103#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 104#else 105#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 106#endif 107#endif 108 109/* 110 * Size of kernel malloc arena in CLBYTES-sized logical pages 111 */ 112#ifndef NKMEMCLUSTERS 113#define NKMEMCLUSTERS (512*1024/CLBYTES) 114#endif 115 116/* pages ("clicks") (4096 bytes) to disk blocks */ 117#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT)) 118#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT)) 119#define dtob(x) ((x)<<DEV_BSHIFT) 120 121/* pages to bytes */ 122#define ctob(x) ((x)<<PGSHIFT) 123 124/* bytes to pages */ 125#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT) 126 127#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 128 ((unsigned)(bytes) >> DEV_BSHIFT) 129#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 130 ((unsigned)(db) << DEV_BSHIFT) 131 132/* 133 * Map a ``block device block'' to a file system block. 134 * This should be device dependent, and should use the bsize 135 * field from the disk label. 136 * For now though just use DEV_BSIZE. 137 */ 138#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 139 140/* 141 * Mach derived conversion macros 142 */ 143#define pmax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 144#define pmax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 145#define pmax_btop(x) ((unsigned)(x) >> PGSHIFT) 146#define pmax_ptob(x) ((unsigned)(x) << PGSHIFT) 147 148#ifdef KERNEL 149#ifndef LOCORE 150extern int (*Mach_splnet)(), (*Mach_splbio)(), (*Mach_splimp)(), 151 (*Mach_spltty)(), (*Mach_splclock)(), (*Mach_splstatclock)(); 152#define splnet() ((*Mach_splnet)()) 153#define splbio() ((*Mach_splbio)()) 154#define splimp() ((*Mach_splimp)()) 155#define spltty() ((*Mach_spltty)()) 156#define splclock() ((*Mach_splclock)()) 157#define splstatclock() ((*Mach_splstatclock)()) 158extern int cpuspeed; 159#define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 160#endif 161 162#else /* !KERNEL */ 163#define DELAY(n) { register int N = (n); while (--N > 0); } 164#endif /* !KERNEL */ 165