00001 /*- 00002 * Copyright (c) 1990 The Regents of the University of California. 00003 * All rights reserved. 00004 * 00005 * This code is derived from software contributed to Berkeley by 00006 * William Jolitz. 00007 * 00008 * Redistribution and use in source and binary forms, with or without 00009 * modification, are permitted provided that the following conditions 00010 * are met: 00011 * 1. Redistributions of source code must retain the above copyright 00012 * notice, this list of conditions and the following disclaimer. 00013 * 2. Redistributions in binary form must reproduce the above copyright 00014 * notice, this list of conditions and the following disclaimer in the 00015 * documentation and/or other materials provided with the distribution. 00016 * 4. Neither the name of the University nor the names of its contributors 00017 * may be used to endorse or promote products derived from this software 00018 * without specific prior written permission. 00019 * 00020 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00021 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00022 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00023 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00024 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00025 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00026 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00027 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00028 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00029 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00030 * SUCH DAMAGE. 00031 * 00032 * from: @(#)param.h 5.8 (Berkeley) 6/28/91 00033 * $FreeBSD: src/sys/i386/include/param.h,v 1.79 2004/11/20 02:29:49 das Exp $ 00034 */ 00035 00036 /* 00037 * Machine dependent constants for Intel 386. 00038 */ 00039 00040 /* 00041 * Round p (pointer or byte index) up to a correctly-aligned value 00042 * for all data types (int, long, ...). The result is unsigned int 00043 * and must be cast to any desired pointer type. 00044 */ 00045 00046 #ifndef _ALIGNBYTES 00047 #define _ALIGNBYTES (sizeof(int) - 1) 00048 #endif 00049 #ifndef _ALIGN 00050 #define _ALIGN(p) (((unsigned)(p) + _ALIGNBYTES) & ~_ALIGNBYTES) 00051 #endif 00052 00053 #ifndef _MACHINE 00054 #define _MACHINE i386 00055 #endif 00056 #ifndef _MACHINE_ARCH 00057 #define _MACHINE_ARCH i386 00058 #endif 00059 00060 #ifndef _NO_NAMESPACE_POLLUTION 00061 00062 #ifndef _MACHINE_PARAM_H_ 00063 #define _MACHINE_PARAM_H_ 00064 00065 #ifndef MACHINE 00066 #define MACHINE "i386" 00067 #endif 00068 #ifndef MACHINE_ARCH 00069 #define MACHINE_ARCH "i386" 00070 #endif 00071 #define MID_MACHINE MID_I386 00072 00073 #ifdef SMP 00074 #define MAXCPU 16 00075 #else 00076 #define MAXCPU 1 00077 #endif /* SMP */ 00078 00079 #define ALIGNBYTES _ALIGNBYTES 00080 #define ALIGN(p) _ALIGN(p) 00081 00082 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 00083 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 00084 #define PAGE_MASK (PAGE_SIZE-1) 00085 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 00086 00087 #ifdef PAE 00088 #define NPGPTD 4 00089 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 00090 #else 00091 #define NPGPTD 1 00092 #define PDRSHIFT 22 /* LOG2(NBPDR) */ 00093 #endif 00094 00095 #define NBPTD (NPGPTD<<PAGE_SHIFT) 00096 #define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 00097 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 00098 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 00099 #define PDRMASK (NBPDR-1) 00100 00101 #define IOPAGES 2 /* pages of i/o permission bitmap */ 00102 00103 #ifndef KSTACK_PAGES 00104 #define KSTACK_PAGES 2 /* Includes pcb! */ 00105 #endif 00106 #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 00107 00108 /* 00109 * Ceiling on amount of swblock kva space, can be changed via 00110 * the kern.maxswzone /boot/loader.conf variable. 00111 */ 00112 #ifndef VM_SWZONE_SIZE_MAX 00113 #define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 00114 #endif 00115 00116 /* 00117 * Ceiling on size of buffer cache (really only effects write queueing, 00118 * the VM page cache is not effected), can be changed via 00119 * the kern.maxbcache /boot/loader.conf variable. 00120 */ 00121 #ifndef VM_BCACHE_SIZE_MAX 00122 #define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024) 00123 #endif 00124 00125 /* 00126 * Mach derived conversion macros 00127 */ 00128 #define trunc_page(x) ((x) & ~PAGE_MASK) 00129 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 00130 #define trunc_4mpage(x) ((x) & ~PDRMASK) 00131 #define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) 00132 00133 #define atop(x) ((x) >> PAGE_SHIFT) 00134 #define ptoa(x) ((x) << PAGE_SHIFT) 00135 00136 #define i386_btop(x) ((x) >> PAGE_SHIFT) 00137 #define i386_ptob(x) ((x) << PAGE_SHIFT) 00138 00139 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 00140 00141 #endif /* !_MACHINE_PARAM_H_ */ 00142 #endif /* !_NO_NAMESPACE_POLLUTION */