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 * $FreeBSD$ 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 93 /* Size of the level 1 page table units */ 94 #define NPTEPG (PAGE_SIZE/(sizeof (pt_entry_t))) 95 #define NPTEPGSHIFT 9 /* LOG2(NPTEPG) */ 96 #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ 97 #define PAGE_SIZE (1<<PAGE_SHIFT) /* bytes/page */ 98 #define PAGE_MASK (PAGE_SIZE-1) 99 /* Size of the level 2 page directory units */ 100 #define NPDEPG (PAGE_SIZE/(sizeof (pd_entry_t))) 101 #define NPDEPGSHIFT 9 /* LOG2(NPDEPG) */ 102 #define PDRSHIFT 21 /* LOG2(NBPDR) */ 103 #define NBPDR (1<<PDRSHIFT) /* bytes/page dir */ 104 #define PDRMASK (NBPDR-1) 105 /* Size of the level 3 page directory pointer table units */ 106 #define NPDPEPG (PAGE_SIZE/(sizeof (pdp_entry_t))) 107 #define NPDPEPGSHIFT 9 /* LOG2(NPDPEPG) */ 108 #define PDPSHIFT 30 /* LOG2(NBPDP) */ 109 #define NBPDP (1<<PDPSHIFT) /* bytes/page dir ptr table */ 110 #define PDPMASK (NBPDP-1) 111 /* Size of the level 4 page-map level-4 table units */ 112 #define NPML4EPG (PAGE_SIZE/(sizeof (pml4_entry_t))) 113 #define NPML4EPGSHIFT 9 /* LOG2(NPML4EPG) */ 114 #define PML4SHIFT 39 /* LOG2(NBPML4T) */ 115 #define NBPML4T (1ul<<PML4SHIFT)/* bytes/page map lev4 table */ 116 #define PML4MASK (NBPML4T-1) 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 #define UAREA_PAGES 1 /* holds struct user WITHOUT PCB (see def.) */ 125 126 127 /* 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