pagetable.hh revision 5877:9fe574944f31
1/* 2 * Copyright (c) 2007 The Hewlett-Packard Development Company 3 * All rights reserved. 4 * 5 * Redistribution and use of this software in source and binary forms, 6 * with or without modification, are permitted provided that the 7 * following conditions are met: 8 * 9 * The software must be used only for Non-Commercial Use which means any 10 * use which is NOT directed to receiving any direct monetary 11 * compensation for, or commercial advantage from such use. Illustrative 12 * examples of non-commercial use are academic research, personal study, 13 * teaching, education and corporate research & development. 14 * Illustrative examples of commercial use are distributing products for 15 * commercial advantage and providing services using the software for 16 * commercial advantage. 17 * 18 * If you wish to use this software or functionality therein that may be 19 * covered by patents for commercial use, please contact: 20 * Director of Intellectual Property Licensing 21 * Office of Strategy and Technology 22 * Hewlett-Packard Company 23 * 1501 Page Mill Road 24 * Palo Alto, California 94304 25 * 26 * Redistributions of source code must retain the above copyright notice, 27 * this list of conditions and the following disclaimer. Redistributions 28 * in binary form must reproduce the above copyright notice, this list of 29 * conditions and the following disclaimer in the documentation and/or 30 * other materials provided with the distribution. Neither the name of 31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 32 * contributors may be used to endorse or promote products derived from 33 * this software without specific prior written permission. No right of 34 * sublicense is granted herewith. Derivatives of the software and 35 * output created using the software may be prepared, but only for 36 * Non-Commercial Uses. Derivatives of the software may be shared with 37 * others provided: (i) the others agree to abide by the list of 38 * conditions herein which includes the Non-Commercial Use restrictions; 39 * and (ii) such Derivatives of the software include the above copyright 40 * notice to acknowledge the contribution from this software where 41 * applicable, this list of conditions and the disclaimer below. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 * 55 * Authors: Gabe Black 56 */ 57 58#ifndef __ARCH_X86_PAGETABLE_HH__ 59#define __ARCH_X86_PAGETABLE_HH__ 60 61#include <iostream> 62#include <string> 63 64#include "sim/host.hh" 65#include "base/bitunion.hh" 66#include "base/misc.hh" 67 68class Checkpoint; 69 70namespace X86ISA 71{ 72 BitUnion64(VAddr) 73 Bitfield<20, 12> longl1; 74 Bitfield<29, 21> longl2; 75 Bitfield<38, 30> longl3; 76 Bitfield<47, 39> longl4; 77 78 Bitfield<20, 12> pael1; 79 Bitfield<29, 21> pael2; 80 Bitfield<31, 30> pael3; 81 82 Bitfield<21, 12> norml1; 83 Bitfield<31, 22> norml2; 84 EndBitUnion(VAddr) 85 86 struct TlbEntry 87 { 88 // The base of the physical page. 89 Addr paddr; 90 91 // The beginning of the virtual page this entry maps. 92 Addr vaddr; 93 // The size of the page this entry represents. 94 Addr size; 95 96 // Read permission is always available, assuming it isn't blocked by 97 // other mechanisms. 98 bool writable; 99 // Whether this page is accesible without being in supervisor mode. 100 bool user; 101 // Whether to use write through or write back. M5 ignores this and 102 // lets the caches handle the writeback policy. 103 //bool pwt; 104 // Whether the page is cacheable or not. 105 bool uncacheable; 106 // Whether or not to kick this page out on a write to CR3. 107 bool global; 108 // A bit used to form an index into the PAT table. 109 bool patBit; 110 // Whether or not memory on this page can be executed. 111 bool noExec; 112 113 TlbEntry(Addr asn, Addr _vaddr, Addr _paddr); 114 TlbEntry() {} 115 116 void 117 updateVaddr(Addr new_vaddr) 118 { 119 vaddr = new_vaddr; 120 } 121 122 Addr pageStart() 123 { 124 return paddr; 125 } 126 127 void serialize(std::ostream &os); 128 void unserialize(Checkpoint *cp, const std::string §ion); 129 }; 130} 131 132#endif 133