param.h revision 191278
1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 33 * $FreeBSD: head/sys/i386/include/param.h 191278 2009-04-19 21:26:36Z rwatson $ 34 */ 35 36/* 37 * Machine dependent constants for Intel 386. 38 */ 39 40/* 41 * Round p (pointer or byte index) up to a correctly-aligned value 42 * for all data types (int, long, ...). The result is unsigned int 43 * and must be cast to any desired pointer type. 44 */ 45#ifndef _ALIGNBYTES 46#define _ALIGNBYTES (sizeof(int) - 1) 47#endif 48#ifndef _ALIGN 49#define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 50#endif 51 52#ifndef _NO_NAMESPACE_POLLUTION 53 54#define __HAVE_ACPI 55#define __PCI_REROUTE_INTERRUPT 56 57#ifndef _MACHINE_PARAM_H_ 58#define _MACHINE_PARAM_H_ 59 60#ifndef MACHINE 61#define MACHINE "i386" 62#endif 63#ifndef MACHINE_ARCH 64#define MACHINE_ARCH "i386" 65#endif 66#define MID_MACHINE MID_I386 67 68#if defined(SMP) || defined(KLD_MODULE) 69#define MAXCPU 32 70#else 71#define MAXCPU 1 72#endif /* SMP || KLD_MODULE */ 73 74#define ALIGNBYTES _ALIGNBYTES 75#define ALIGN(p) _ALIGN(p) 76 77/* 78 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 79 * architecture. It should be used with appropriate caution. 80 */ 81#ifndef CACHE_LINE_SHIFT 82#define CACHE_LINE_SHIFT 6 83#endif 84#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 85 86#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 87#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 88#define PAGE_MASK (PAGE_SIZE-1) 89#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 90 91#ifdef PAE 92#define NPGPTD 4 93#define PDRSHIFT 21 /* LOG2(NBPDR) */ 94#define NPGPTD_SHIFT 9 95#else 96#define NPGPTD 1 97#define PDRSHIFT 22 /* LOG2(NBPDR) */ 98#define NPGPTD_SHIFT 10 99#endif 100 101#define NBPTD (NPGPTD<<PAGE_SHIFT) 102#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 103#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 104#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 105#define PDRMASK (NBPDR-1) 106 107#define IOPAGES 2 /* pages of i/o permission bitmap */ 108 109#ifndef KSTACK_PAGES 110#define KSTACK_PAGES 2 /* Includes pcb! */ 111#endif 112#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 113 114/* 115 * Ceiling on amount of swblock kva space, can be changed via 116 * the kern.maxswzone /boot/loader.conf variable. 117 */ 118#ifndef VM_SWZONE_SIZE_MAX 119#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 120#endif 121 122/* 123 * Ceiling on size of buffer cache (really only effects write queueing, 124 * the VM page cache is not effected), can be changed via 125 * the kern.maxbcache /boot/loader.conf variable. 126 */ 127#ifndef VM_BCACHE_SIZE_MAX 128#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024) 129#endif 130 131/* 132 * Mach derived conversion macros 133 */ 134#define trunc_page(x) ((x) & ~PAGE_MASK) 135#define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 136#define trunc_4mpage(x) ((x) & ~PDRMASK) 137#define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) 138 139#define atop(x) ((x) >> PAGE_SHIFT) 140#define ptoa(x) ((x) << PAGE_SHIFT) 141 142#define i386_btop(x) ((x) >> PAGE_SHIFT) 143#define i386_ptob(x) ((x) << PAGE_SHIFT) 144 145#define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 146 147#endif /* !_MACHINE_PARAM_H_ */ 148#endif /* !_NO_NAMESPACE_POLLUTION */ 149