param.h revision 112569
1178172Simp/*- 2178172Simp * Copyright (c) 1990 The Regents of the University of California. 3178172Simp * All rights reserved. 4178172Simp * 5178172Simp * This code is derived from software contributed to Berkeley by 6178172Simp * William Jolitz. 7178172Simp * 8178172Simp * Redistribution and use in source and binary forms, with or without 9178172Simp * modification, are permitted provided that the following conditions 10178172Simp * are met: 11178172Simp * 1. Redistributions of source code must retain the above copyright 12178172Simp * notice, this list of conditions and the following disclaimer. 13178172Simp * 2. Redistributions in binary form must reproduce the above copyright 14178172Simp * notice, this list of conditions and the following disclaimer in the 15178172Simp * documentation and/or other materials provided with the distribution. 16178172Simp * 3. All advertising materials mentioning features or use of this software 17178172Simp * must display the following acknowledgement: 18178172Simp * This product includes software developed by the University of 19178172Simp * California, Berkeley and its contributors. 20178172Simp * 4. Neither the name of the University nor the names of its contributors 21178172Simp * may be used to endorse or promote products derived from this software 22178172Simp * without specific prior written permission. 23178172Simp * 24178172Simp * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25178172Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26178172Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27178172Simp * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28178172Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29178172Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30178172Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31178172Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32178172Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33178172Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34178172Simp * SUCH DAMAGE. 35178172Simp * 36178172Simp * from: @(#)param.h 5.8 (Berkeley) 6/28/91 37178172Simp * $FreeBSD: head/sys/i386/include/param.h 112569 2003-03-25 00:07:06Z jake $ 38178172Simp */ 39178172Simp 40178172Simp/* 41178172Simp * Machine dependent constants for Intel 386. 42178172Simp */ 43178172Simp 44232449Sjmallett/* 45202046Simp * Round p (pointer or byte index) up to a correctly-aligned value 46202046Simp * for all data types (int, long, ...). The result is unsigned int 47178172Simp * and must be cast to any desired pointer type. 48178172Simp */ 49178172Simp#ifndef _ALIGNBYTES 50178172Simp#define _ALIGNBYTES (sizeof(int) - 1) 51199135Skib#endif 52232449Sjmallett#ifndef _ALIGN 53178172Simp#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 54178172Simp#endif 55178172Simp 56178172Simp#ifndef _MACHINE 57178172Simp#define _MACHINE i386 58178172Simp#endif 59178172Simp#ifndef _MACHINE_ARCH 60202046Simp#define _MACHINE_ARCH i386 61178172Simp#endif 62178172Simp 63178172Simp#ifndef _NO_NAMESPACE_POLLUTION 64178172Simp 65178172Simp#ifndef _MACHINE_PARAM_H_ 66178172Simp#define _MACHINE_PARAM_H_ 67206714Sjmallett 68206714Sjmallett#ifndef MACHINE 69178172Simp#define MACHINE "i386" 70206714Sjmallett#endif 71178172Simp#ifndef MACHINE_ARCH 72206714Sjmallett#define MACHINE_ARCH "i386" 73206714Sjmallett#endif 74206714Sjmallett#define MID_MACHINE MID_I386 75206714Sjmallett 76178172Simp#ifdef SMP 77178172Simp#define MAXCPU 16 78178172Simp#else 79178172Simp#define MAXCPU 1 80178172Simp#endif /* SMP */ 81178172Simp 82178172Simp#define ALIGNBYTES _ALIGNBYTES 83178172Simp#define ALIGN(p) _ALIGN(p) 84178172Simp 85250137Simp#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 86250137Simp#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 87250137Simp#define PAGE_MASK (PAGE_SIZE-1) 88250137Simp#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 89250137Simp 90250137Simp#define NPGPTD 1 91250137Simp#define PDRSHIFT 22 /* LOG2(NBPDR) */ 92250137Simp 93250137Simp#define NBPTD (NPGPTD<<PAGE_SHIFT) 94250137Simp#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 95250137Simp#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 96250137Simp#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 97217944Sjchandra#define PDRMASK (NBPDR-1) 98178172Simp 99178172Simp#define IOPAGES 2 /* pages of i/o permission bitmap */ 100178172Simp 101178172Simp#ifndef KSTACK_PAGES 102206714Sjmallett#define KSTACK_PAGES 2 /* Includes pcb! */ 103206714Sjmallett#endif 104178172Simp#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */ 105206714Sjmallett 106206714Sjmallett#define KSTACK_GUARD /* compile in the kstack guard page */ 107206714Sjmallett 108206714Sjmallett/* 109178172Simp * Ceiling on amount of swblock kva space, can be changed via 110178172Simp * the kern.maxswzone /boot/loader.conf variable. 111217944Sjchandra */ 112178172Simp#ifndef VM_SWZONE_SIZE_MAX 113178172Simp#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 114178172Simp#endif 115178172Simp 116178172Simp/* 117178172Simp * Ceiling on size of buffer cache (really only effects write queueing, 118178172Simp * the VM page cache is not effected), can be changed via 119178172Simp * the kern.maxbcache /boot/loader.conf variable. 120178172Simp */ 121178172Simp#ifndef VM_BCACHE_SIZE_MAX 122178172Simp#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024) 123178172Simp#endif 124178172Simp 125178172Simp/* 126178172Simp * Mach derived conversion macros 127178172Simp */ 128178172Simp#define trunc_page(x) ((x) & ~PAGE_MASK) 129178172Simp#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 130178172Simp#define trunc_4mpage(x) ((x) & ~PDRMASK) 131178172Simp#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) 132178172Simp 133178172Simp#define atop(x) ((x) >> PAGE_SHIFT) 134178172Simp#define ptoa(x) ((x) << PAGE_SHIFT) 135178172Simp 136178172Simp#define i386_btop(x) ((x) >> PAGE_SHIFT) 137178172Simp#define i386_ptob(x) ((x) << PAGE_SHIFT) 138215034Sbrucec 139215034Sbrucec#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 140178172Simp 141178172Simp#endif /* !_MACHINE_PARAM_H_ */ 142178172Simp#endif /* !_NO_NAMESPACE_POLLUTION */ 143178172Simp