param.h revision 114349
1269865Sume/* 2269865Sume * Copyright (c) 2002 David E. O'Brien. All rights reserved. 3270837Sume * Copyright (c) 1992, 1993 4269865Sume * The Regents of the University of California. All rights reserved. 5269865Sume * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department and Ralph Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)param.h 8.1 (Berkeley) 6/10/93 39 * $FreeBSD: head/sys/amd64/include/param.h 114349 2003-05-01 01:05:25Z peter $ 40 */ 41 42/* 43 * Machine dependent constants for AMD64. 44 */ 45 46/* 47 * Round p (pointer or byte index) up to a correctly-aligned value 48 * for all data types (int, long, ...). The result is u_long and 49 * must be cast to any desired pointer type. 50 * 51 * ALIGNED_POINTER is a boolean macro that checks whether an address 52 * is valid to fetch data elements of type t from on this architecture. 53 * This does not reflect the optimal alignment, just the possibility 54 * (within reasonable limits). 55 * 56 */ 57#ifndef _ALIGNBYTES 58#define _ALIGNBYTES (sizeof(long) - 1) 59#endif 60#ifndef _ALIGN 61#define _ALIGN(p) (((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) 62#endif 63#ifndef _ALIGNED_POINTER 64#define _ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 65#endif 66 67#ifndef _MACHINE 68#define _MACHINE amd64 69#endif 70#ifndef _MACHINE_ARCH 71#define _MACHINE_ARCH amd64 72#endif 73 74#ifndef _NO_NAMESPACE_POLLUTION 75 76#ifndef _MACHINE_PARAM_H_ 77#define _MACHINE_PARAM_H_ 78 79#ifndef MACHINE 80#define MACHINE "amd64" 81#endif 82#ifndef MACHINE_ARCH 83#define MACHINE_ARCH "amd64" 84#endif 85 86#define MAXCPU 1 87 88#define ALIGNBYTES _ALIGNBYTES 89#define ALIGN(p) _ALIGN(p) 90#define ALIGNED_POINTER(p,t) _ALIGNED_POINTER((p),(t)) 91 92/* Size of the level 1 page table units */ 93#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 94#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 95#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 96#define PAGE_MASK (PAGE_SIZE-1) 97/* Size of the level 2 page directory units */ 98#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 99#define PDRSHIFT 21 /* LOG2(NBPDR) */ 100#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 101#define PDRMASK (NBPDR-1) 102/* Size of the level 3 page directory pointer table units */ 103#define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 104#define PDPSHIFT 30 /* LOG2(NBPDP) */ 105#define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 106#define PDPMASK (NBPDP-1) 107/* Size of the level 4 page-map level-4 table units */ 108#define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 109#define PML4SHIFT 39 /* LOG2(NBPML4T) */ 110#define NBPML4T (1ul<<PML4SHIFT)/* bytes/page map lev4 table */ 111#define PML4MASK (NBPML4T-1) 112 113#define NKPML4E 1 /* addressable number of page tables/pde's */ 114#define NKPDPE 1 /* addressable number of page tables/pde's */ 115#define NPGPTD 4 116 117#define NBPTD (NPGPTD<<PAGE_SHIFT) 118#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 119 120#define IOPAGES 2 /* pages of i/o permission bitmap */ 121 122#define KSTACK_PAGES 4 /* pages of kstack (with pcb) */ 123#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */ 124 125#define KSTACK_GUARD 1 /* compile in the kstack guard page */ 126 127/* 128 * Ceiling on amount of swblock kva space, can be changed via 129 * the kern.maxswzone /boot/loader.conf variable. 130 */ 131#ifndef VM_SWZONE_SIZE_MAX 132#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 133#endif 134 135/* 136 * Ceiling on size of buffer cache (really only effects write queueing, 137 * the VM page cache is not effected), can be changed via 138 * the kern.maxbcache /boot/loader.conf variable. 139 */ 140#ifndef VM_BCACHE_SIZE_MAX 141#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024) 142#endif 143 144/* 145 * Mach derived conversion macros 146 */ 147#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK)) 148#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 149#define trunc_2mpage(x) ((unsigned long)(x) & ~PDRMASK) 150#define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~PDRMASK) 151 152#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 153#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 154 155#define amd64_btop(x) ((unsigned long)(x) >> PAGE_SHIFT) 156#define amd64_ptob(x) ((unsigned long)(x) << PAGE_SHIFT) 157 158#define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024)) 159 160#endif /* !_MACHINE_PARAM_H_ */ 161#endif /* !_NO_NAMESPACE_POLLUTION */ 162