param.h revision 224207
1/*- 2 * Copyright (c) 2002 David E. O'Brien. All rights reserved. 3 * Copyright (c) 1992, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 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 224207 2011-07-19 00:37:24Z attilio $ 40 */ 41 42 43#ifndef _AMD64_INCLUDE_PARAM_H_ 44#define _AMD64_INCLUDE_PARAM_H_ 45 46#include <machine/_align.h> 47 48/* 49 * Machine dependent constants for AMD64. 50 */ 51 52 53#define __HAVE_ACPI 54#define __PCI_REROUTE_INTERRUPT 55 56#ifndef MACHINE 57#define MACHINE "amd64" 58#endif 59#ifndef MACHINE_ARCH 60#define MACHINE_ARCH "amd64" 61#endif 62#ifndef MACHINE_ARCH32 63#define MACHINE_ARCH32 "i386" 64#endif 65 66#if defined(SMP) || defined(KLD_MODULE) 67#ifndef MAXCPU 68#define MAXCPU 32 69#endif 70#else 71#define MAXCPU 1 72#endif 73 74#define ALIGNBYTES _ALIGNBYTES 75#define ALIGN(p) _ALIGN(p) 76/* 77 * ALIGNED_POINTER is a boolean macro that checks whether an address 78 * is valid to fetch data elements of type t from on this architecture. 79 * This does not reflect the optimal alignment, just the possibility 80 * (within reasonable limits). 81 */ 82#define ALIGNED_POINTER(p, t) 1 83 84/* 85 * CACHE_LINE_SIZE is the compile-time maximum cache line size for an 86 * architecture. It should be used with appropriate caution. 87 */ 88#define CACHE_LINE_SHIFT 7 89#define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) 90 91/* Size of the level 1 page table units */ 92#define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 93#define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 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 NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ 100#define PDRSHIFT 21 /* LOG2(NBPDR) */ 101#define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 102#define PDRMASK (NBPDR-1) 103/* Size of the level 3 page directory pointer table units */ 104#define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 105#define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ 106#define PDPSHIFT 30 /* LOG2(NBPDP) */ 107#define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 108#define PDPMASK (NBPDP-1) 109/* Size of the level 4 page-map level-4 table units */ 110#define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 111#define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ 112#define PML4SHIFT 39 /* LOG2(NBPML4) */ 113#define NBPML4 (1UL<<PML4SHIFT)/* bytes/page map lev4 table */ 114#define PML4MASK (NBPML4-1) 115 116#define MAXPAGESIZES 3 /* maximum number of supported page sizes */ 117 118#define IOPAGES 2 /* pages of i/o permission bitmap */ 119 120#ifndef KSTACK_PAGES 121#define KSTACK_PAGES 4 /* pages of kstack (with pcb) */ 122#endif 123#define KSTACK_GUARD_PAGES 1 /* pages of kstack guard; 0 disables */ 124 125/* 126 * Ceiling on amount of swblock kva space, can be changed via 127 * the kern.maxswzone /boot/loader.conf variable. 128 */ 129#ifndef VM_SWZONE_SIZE_MAX 130#define VM_SWZONE_SIZE_MAX (32 * 1024 * 1024) 131#endif 132 133/* 134 * Mach derived conversion macros 135 */ 136#define round_page(x) ((((unsigned long)(x)) + PAGE_MASK) & ~(PAGE_MASK)) 137#define trunc_page(x) ((unsigned long)(x) & ~(PAGE_MASK)) 138#define trunc_2mpage(x) ((unsigned long)(x) & ~PDRMASK) 139#define round_2mpage(x) ((((unsigned long)(x)) + PDRMASK) & ~PDRMASK) 140#define trunc_1gpage(x) ((unsigned long)(x) & ~PDPMASK) 141 142#define atop(x) ((unsigned long)(x) >> PAGE_SHIFT) 143#define ptoa(x) ((unsigned long)(x) << PAGE_SHIFT) 144 145#define amd64_btop(x) ((unsigned long)(x) >> PAGE_SHIFT) 146#define amd64_ptob(x) ((unsigned long)(x) << PAGE_SHIFT) 147 148#define pgtok(x) ((unsigned long)(x) * (PAGE_SIZE / 1024)) 149 150#endif /* !_AMD64_INCLUDE_PARAM_H_ */ 151