param.h revision 114349
1110545Sphk/* 2110545Sphk * Copyright (c) 2002 David E. O'Brien. All rights reserved. 3110545Sphk * Copyright (c) 1992, 1993 4110545Sphk * The Regents of the University of California. All rights reserved. 5110545Sphk * 6110545Sphk * This code is derived from software contributed to Berkeley by 7110545Sphk * the Systems Programming Group of the University of Utah Computer 8110545Sphk * Science Department and Ralph Campbell. 9110545Sphk * 10110545Sphk * Redistribution and use in source and binary forms, with or without 11110545Sphk * modification, are permitted provided that the following conditions 12110545Sphk * are met: 13110545Sphk * 1. Redistributions of source code must retain the above copyright 14110545Sphk * notice, this list of conditions and the following disclaimer. 15110545Sphk * 2. Redistributions in binary form must reproduce the above copyright 16110545Sphk * notice, this list of conditions and the following disclaimer in the 17110545Sphk * documentation and/or other materials provided with the distribution. 18110545Sphk * 3. All advertising materials mentioning features or use of this software 19110545Sphk * must display the following acknowledgement: 20110545Sphk * This product includes software developed by the University of 21110545Sphk * California, Berkeley and its contributors. 22110545Sphk * 4. Neither the name of the University nor the names of its contributors 23110545Sphk * may be used to endorse or promote products derived from this software 24110545Sphk * without specific prior written permission. 25110545Sphk * 26110545Sphk * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27110545Sphk * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28110545Sphk * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29110545Sphk * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30110545Sphk * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31110545Sphk * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32110545Sphk * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33110545Sphk * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34126786Sjhb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35126786Sjhb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36110603Sphk * SUCH DAMAGE. 37110547Sphk * 38110545Sphk * @(#)param.h 8.1 (Berkeley) 6/10/93 39112510Sphk * $FreeBSD: head/sys/amd64/include/param.h 114349 2003-05-01 01:05:25Z peter $ 40112510Sphk */ 41126786Sjhb 42126786Sjhb/* 43110545Sphk * Machine dependent constants for AMD64. 44110545Sphk */ 45110545Sphk 46110545Sphk/* 47110545Sphk * Round p (pointer or byte index) up to a correctly-aligned value 48110545Sphk * for all data types (int, long, ...). The result is u_long and 49110545Sphk * must be cast to any desired pointer type. 50112372Sphk * 51110545Sphk * ALIGNED_POINTER is a boolean macro that checks whether an address 52110603Sphk * is valid to fetch data elements of type t from on this architecture. 53110603Sphk * This does not reflect the optimal alignment, just the possibility 54110603Sphk * (within reasonable limits). 55110603Sphk * 56110603Sphk */ 57110603Sphk#ifndef _ALIGNBYTES 58110603Sphk#define _ALIGNBYTES (sizeof(long) - 1) 59110603Sphk#endif 60110603Sphk#ifndef _ALIGN 61110603Sphk#define _ALIGN(p) (((u_long)(p) + _ALIGNBYTES) &~ _ALIGNBYTES) 62110603Sphk#endif 63110603Sphk#ifndef _ALIGNED_POINTER 64110603Sphk#define _ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 65110603Sphk#endif 66110603Sphk 67110603Sphk#ifndef _MACHINE 68110603Sphk#define _MACHINE amd64 69126786Sjhb#endif 70126786Sjhb#ifndef _MACHINE_ARCH 71110603Sphk#define _MACHINE_ARCH amd64 72110603Sphk#endif 73110603Sphk 74126786Sjhb#ifndef _NO_NAMESPACE_POLLUTION 75110603Sphk 76110603Sphk#ifndef _MACHINE_PARAM_H_ 77110603Sphk#define _MACHINE_PARAM_H_ 78126786Sjhb 79126786Sjhb#ifndef MACHINE 80110603Sphk#define MACHINE "amd64" 81110603Sphk#endif 82110603Sphk#ifndef MACHINE_ARCH 83126786Sjhb#define MACHINE_ARCH "amd64" 84126786Sjhb#endif 85126786Sjhb 86110603Sphk#define MAXCPU 1 87110603Sphk 88110603Sphk#define ALIGNBYTES _ALIGNBYTES 89126786Sjhb#define ALIGN(p) _ALIGN(p) 90126786Sjhb#define ALIGNED_POINTER(p,t) _ALIGNED_POINTER((p),(t)) 91126786Sjhb 92126786Sjhb/* Size of the level 1 page table units */ 93126786Sjhb#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 94110603Sphk#define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 95110603Sphk#define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 96110603Sphk#define PAGE_MASK (PAGE_SIZE-1) 97126786Sjhb/* Size of the level 2 page directory units */ 98126786Sjhb#define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 99126786Sjhb#define PDRSHIFT 21 /* LOG2(NBPDR) */ 100126786Sjhb#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 101126786Sjhb#define PDRMASK (NBPDR-1) 102126786Sjhb/* Size of the level 3 page directory pointer table units */ 103126786Sjhb#define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 104126786Sjhb#define PDPSHIFT 30 /* LOG2(NBPDP) */ 105110603Sphk#define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 106110603Sphk#define PDPMASK (NBPDP-1) 107110603Sphk/* Size of the level 4 page-map level-4 table units */ 108126786Sjhb#define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 109126786Sjhb#define PML4SHIFT 39 /* LOG2(NBPML4T) */ 110126786Sjhb#define NBPML4T (1ul<<PML4SHIFT)/* bytes/page map lev4 table */ 111126786Sjhb#define PML4MASK (NBPML4T-1) 112126786Sjhb 113126786Sjhb#define NKPML4E 1 /* addressable number of page tables/pde's */ 114126786Sjhb#define NKPDPE 1 /* addressable number of page tables/pde's */ 115110603Sphk#define NPGPTD 4 116110603Sphk 117110603Sphk#define NBPTD (NPGPTD<<PAGE_SHIFT) 118126786Sjhb#define NPDEPTD (NBPTD/(sizeof (pd_entry_t))) 119126786Sjhb 120126786Sjhb#define IOPAGES 2 /* pages of i/o permission bitmap */ 121126786Sjhb 122126786Sjhb#define KSTACK_PAGES 4 /* pages of kstack (with pcb) */ 123126786Sjhb#define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */ 124126786Sjhb 125126786Sjhb#define KSTACK_GUARD 1 /* compile in the kstack guard page */ 126126786Sjhb 127110603Sphk/* 128110603Sphk * Ceiling on amount of swblock kva space, can be changed via 129112340Sphk * the kern.maxswzone /boot/loader.conf variable. 130110603Sphk */ 131110603Sphk#ifndef VM_SWZONE_SIZE_MAX 132110603Sphk#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 133110603Sphk#endif 134112510Sphk 135112510Sphk/* 136112709Sphk * Ceiling on size of buffer cache (really only effects write queueing, 137112510Sphk * the VM page cache is not effected), can be changed via 138112510Sphk * the kern.maxbcache /boot/loader.conf variable. 139112709Sphk */ 140112510Sphk#ifndef VM_BCACHE_SIZE_MAX 141112709Sphk#define VM_BCACHE_SIZE_MAX (200 * 1024 * 1024) 142115625Sphk#endif 143112709Sphk 144112709Sphk/* 145112709Sphk * Mach derived conversion macros 146112510Sphk */ 147169299Spjd#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK)) 148169299Spjd#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 149169299Spjd#define trunc_2mpage(x) ((unsigned long)(x) & ~PDRMASK) 150169299Spjd#define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~PDRMASK) 151169299Spjd 152169299Spjd#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 153169299Spjd#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 154169299Spjd 155169299Spjd#define amd64_btop(x) ((unsigned long)(x) >> PAGE_SHIFT) 156169299Spjd#define amd64_ptob(x) ((unsigned long)(x) << PAGE_SHIFT) 157169299Spjd 158126786Sjhb#define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024)) 159126786Sjhb 160110545Sphk#endif /* !_MACHINE_PARAM_H_ */ 161#endif /* !_NO_NAMESPACE_POLLUTION */ 162