param.h revision 1.4
1/* $NetBSD: param.h,v 1.4 1996/03/01 23:30:34 cgd Exp $ */ 2 3/* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1982, 1986, 1990, 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. 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 $Hdr: machparam.h 1.16 92/12/20$ 41 * 42 * @(#)param.h 8.1 (Berkeley) 6/10/93 43 */ 44 45/* 46 * Machine dependent constants for mvme68k, based on HP9000 series 300. 47 */ 48#define MACHINE "mvme68k" 49#define MACHINE_ARCH "m68k" 50#define MID_MACHINE MID_M68K 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 (sizeof(int) - 1) 58#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 59 60#define PGSHIFT 12 /* LOG2(NBPG) */ 61#define NBPG (1 << PGSHIFT) /* bytes/page */ 62#define PGOFSET (NBPG-1) /* byte offset into page */ 63#define NPTEPG (NBPG/(sizeof (pt_entry_t))) 64 65#define SEGSHIFT 22 /* LOG2(NBSEG) */ 66#define NBSEG (1 << SEGSHIFT) /* bytes/segment */ 67#define SEGOFSET (NBSEG-1) /* byte offset into segment */ 68 69#define KERNBASE 0x00000000 /* start of kernel virtual */ 70#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT) 71 72#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 73#define DEV_BSIZE (1 << DEV_BSHIFT) 74#define BLKDEV_IOSIZE 2048 75#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ 76 77#define CLSIZELOG2 0 78#define CLSIZE (1 << CLSIZELOG2) 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#define UPAGES 3 /* pages of u-area */ 84#define USPACE (UPAGES * NBPG) /* total size of u-area */ 85 86/* 87 * Constants related to network buffer management. 88 * MCLBYTES must be no larger than CLBYTES (the software page size), and, 89 * on machines that exchange pages of input or output buffers with mbuf 90 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 91 * of the hardware page size. 92 */ 93#define MSIZE 128 /* size of an mbuf */ 94#define MCLSHIFT 11 95#define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */ 96#define MCLOFSET (MCLBYTES - 1) 97 98#ifndef NMBCLUSTERS 99#ifdef GATEWAY 100#define NMBCLUSTERS 512 /* map size, max cluster allocation */ 101#else 102#define NMBCLUSTERS 256 /* map size, max cluster allocation */ 103#endif 104#endif 105 106/* 107 * Size of kernel malloc arena in CLBYTES-sized logical pages 108 */ 109#ifndef NKMEMCLUSTERS 110#define NKMEMCLUSTERS (2048 * 1024 / CLBYTES) 111#endif 112 113/* pages ("clicks") to disk blocks */ 114#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 115#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 116 117/* pages to bytes */ 118#define ctob(x) ((x) << PGSHIFT) 119#define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 120 121/* bytes to disk blocks */ 122#define dbtob(x) ((x) << DEV_BSHIFT) 123#define btodb(x) ((x) >> DEV_BSHIFT) 124 125/* 126 * Map a ``block device block'' to a file system block. 127 * This should be device dependent, and should use the bsize 128 * field from the disk label. 129 * For now though just use DEV_BSIZE. 130 */ 131#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE)) 132 133/* 134 * Mach derived conversion macros 135 */ 136#define m68k_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET) 137#define m68k_trunc_page(x) ((unsigned)(x) & ~PGOFSET) 138#define m68k_btop(x) ((unsigned)(x) >> PGSHIFT) 139#define m68k_ptob(x) ((unsigned)(x) << PGSHIFT) 140 141/* 142 * spl functions; all but spl0 are done in-line 143 */ 144#include <machine/psl.h> 145 146#define _spl(s) \ 147({ \ 148 register int _spl_r; \ 149\ 150 __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \ 151 "&=d" (_spl_r) : "di" (s)); \ 152 _spl_r; \ 153}) 154 155/* spl0 requires checking for software interrupts */ 156#define spl1() _spl(PSL_S|PSL_IPL1) 157#define spl2() _spl(PSL_S|PSL_IPL2) 158#define spl3() _spl(PSL_S|PSL_IPL3) 159#define spl4() _spl(PSL_S|PSL_IPL4) 160#define spl5() _spl(PSL_S|PSL_IPL5) 161#define spl6() _spl(PSL_S|PSL_IPL6) 162#define spl7() _spl(PSL_S|PSL_IPL7) 163 164#define splsoftclock() spl1() 165#define splsoftnet() spl1() 166#define splbio() spl2() 167#define splnet() spl3() 168#define spltty() spl3() 169#define splimp() spl3() 170#define splclock() spl5() 171#define splstatclock() spl5() 172#define splvm() spl5() 173#define splhigh() spl7() 174#define splsched() spl7() 175 176/* watch out for side effects */ 177#define splx(s) (s & PSL_IPL ? _spl(s) : spl0()) 178 179#ifdef _KERNEL 180#ifndef _LOCORE 181int cpuspeed; 182#define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 183#endif 184#endif 185