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 * $FreeBSD$ 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 #define CACHE_LINE_SHIFT 7 82 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 83 84 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 85 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 86 #define PAGE_MASK (PAGE_SIZE-1) 87 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 88 89 #ifdef PAE 90 #define NPGPTD 4 91 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 92 #define NPGPTD_SHIFT 9 93 #else 94 #define NPGPTD 1 95 #define PDRSHIFT 22 /* LOG2(NBPDR) */ 96 #define NPGPTD_SHIFT 10 97 #endif 98 99 #define NBPTD (NPGPTD<<PAGE_SHIFT) 100 #define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 101 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 102 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 103 #define PDRMASK (NBPDR-1) 104 105 #define IOPAGES 2 /* pages of i/o permission bitmap */ 106 107 #ifndef KSTACK_PAGES 108 #define KSTACK_PAGES 2 /* Includes pcb! */ 109 #endif 110 #define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 111 112 /* 113 * Ceiling on amount of swblock kva space, can be changed via 114 * the kern.maxswzone /boot/loader.conf variable. 115 */ 116 #ifndef VM_SWZONE_SIZE_MAX 117 #define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 118 #endif 119 120 /* 121 * Ceiling on size of buffer cache (really only effects write queueing, 122 * the VM page cache is not effected), can be changed via 123 * the kern.maxbcache /boot/loader.conf variable. 124 */ 125 #ifndef VM_BCACHE_SIZE_MAX 126 #define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024) 127 #endif 128 129 /* 130 * Mach derived conversion macros 131 */ 132 #define trunc_page(x) ((x) & ~PAGE_MASK) 133 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 134 #define trunc_4mpage(x) ((x) & ~PDRMASK) 135 #define round_4mpage(x) ((((x)) + PDRMASK) & ~PDRMASK) 136 137 #define atop(x) ((x) >> PAGE_SHIFT) 138 #define ptoa(x) ((x) << PAGE_SHIFT) 139 140 #define i386_btop(x) ((x) >> PAGE_SHIFT) 141 #define i386_ptob(x) ((x) << PAGE_SHIFT) 142 143 #define pgtok(x) ((x) * (PAGE_SIZE / 1024)) 144 145 #endif /* !_MACHINE_PARAM_H_ */ 146 #endif /* !_NO_NAMESPACE_POLLUTION */ 147