pagetable.hh revision 8763
1/* 2 * Copyright (c) 2010 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2002-2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Ali Saidi 41 */ 42 43#ifndef __ARCH_ARM_PAGETABLE_H__ 44#define __ARCH_ARM_PAGETABLE_H__ 45 46#include "arch/arm/isa_traits.hh" 47#include "arch/arm/utility.hh" 48#include "arch/arm/vtophys.hh" 49#include "config/full_system.hh" 50#include "sim/serialize.hh" 51 52namespace ArmISA { 53 54struct VAddr 55{ 56 VAddr(Addr a) { panic("not implemented yet."); } 57}; 58 59 60// ITB/DTB page table entry 61struct PTE 62{ 63 void serialize(std::ostream &os) 64 { 65 panic("Need to implement PTE serialization\n"); 66 } 67 68 void unserialize(Checkpoint *cp, const std::string §ion) 69 { 70 panic("Need to implement PTE serialization\n"); 71 } 72 73}; 74 75// ITB/DTB table entry 76struct TlbEntry 77{ 78 public: 79 enum MemoryType { 80 StronglyOrdered, 81 Device, 82 Normal 83 }; 84 enum DomainType { 85 DomainNoAccess = 0, 86 DomainClient, 87 DomainReserved, 88 DomainManager 89 }; 90 91 // Matching variables 92 Addr pfn; 93 Addr size; // Size of this entry, == Type of TLB Rec 94 Addr vpn; // Virtual Page Number 95 uint32_t asid; // Address Space Identifier 96 uint8_t N; // Number of bits in pagesize 97 bool global; 98 bool valid; 99 100 // Type of memory 101 bool nonCacheable; // Can we wrap this in mtype? 102 bool sNp; // Section descriptor 103 104 // Memory Attributes 105 MemoryType mtype; 106 uint8_t innerAttrs; 107 uint8_t outerAttrs; 108 bool shareable; 109 uint32_t attributes; // Memory attributes formatted for PAR 110 111 112 // Access permissions 113 bool xn; // Execute Never 114 uint8_t ap; // Access permissions bits 115 uint8_t domain; // Access Domain 116 117 //Construct an entry that maps to physical address addr for SE mode 118 TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr) 119 { 120 pfn = _paddr >> PageShift; 121 size = PageBytes - 1; 122 asid = _asn; 123 global = false; 124 valid = true; 125 126 vpn = _vaddr >> PageShift; 127 128 nonCacheable = sNp = false; 129 130 xn = 0; 131 ap = 0; // ??? 132 domain = DomainClient; //??? 133 } 134 135 TlbEntry() 136 {} 137 138 void 139 updateVaddr(Addr new_vaddr) 140 { 141 vpn = new_vaddr >> PageShift; 142 } 143 144 Addr 145 pageStart() 146 { 147 return pfn << PageShift; 148 } 149 150 bool 151 match(Addr va, uint8_t cid) 152 { 153 Addr v = vpn << N; 154 if (valid && va >= v && va <= v + size && (global || cid == asid)) 155 return true; 156 return false; 157 } 158 159 Addr 160 pAddr(Addr va) 161 { 162 return (pfn << N) | (va & size); 163 } 164 165 void 166 serialize(std::ostream &os) 167 { 168 SERIALIZE_SCALAR(pfn); 169 SERIALIZE_SCALAR(size); 170 SERIALIZE_SCALAR(vpn); 171 SERIALIZE_SCALAR(asid); 172 SERIALIZE_SCALAR(N); 173 SERIALIZE_SCALAR(global); 174 SERIALIZE_SCALAR(valid); 175 SERIALIZE_SCALAR(nonCacheable); 176 SERIALIZE_SCALAR(sNp); 177 SERIALIZE_ENUM(mtype); 178 SERIALIZE_SCALAR(innerAttrs); 179 SERIALIZE_SCALAR(outerAttrs); 180 SERIALIZE_SCALAR(shareable); 181 SERIALIZE_SCALAR(attributes); 182 SERIALIZE_SCALAR(xn); 183 SERIALIZE_SCALAR(ap); 184 SERIALIZE_SCALAR(domain); 185 } 186 void 187 unserialize(Checkpoint *cp, const std::string §ion) 188 { 189 UNSERIALIZE_SCALAR(pfn); 190 UNSERIALIZE_SCALAR(size); 191 UNSERIALIZE_SCALAR(vpn); 192 UNSERIALIZE_SCALAR(asid); 193 UNSERIALIZE_SCALAR(N); 194 UNSERIALIZE_SCALAR(global); 195 UNSERIALIZE_SCALAR(valid); 196 UNSERIALIZE_SCALAR(nonCacheable); 197 UNSERIALIZE_SCALAR(sNp); 198 UNSERIALIZE_ENUM(mtype); 199 UNSERIALIZE_SCALAR(innerAttrs); 200 UNSERIALIZE_SCALAR(outerAttrs); 201 UNSERIALIZE_SCALAR(shareable); 202 UNSERIALIZE_SCALAR(attributes); 203 UNSERIALIZE_SCALAR(xn); 204 UNSERIALIZE_SCALAR(ap); 205 UNSERIALIZE_SCALAR(domain); 206 } 207 208}; 209 210 211 212}; 213#endif // __ARCH_ARM_PAGETABLE_H__ 214 215