pagetable.hh revision 7733
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 51#include "sim/serialize.hh" 52 53namespace ArmISA { 54 55struct VAddr 56{ 57 VAddr(Addr a) { panic("not implemented yet."); } 58}; 59 60 61// ITB/DTB page table entry 62struct PTE 63{ 64 void serialize(std::ostream &os) 65 { 66 panic("Need to implement PTE serialization\n"); 67 } 68 69 void unserialize(Checkpoint *cp, const std::string §ion) 70 { 71 panic("Need to implement PTE serialization\n"); 72 } 73 74}; 75 76// ITB/DTB table entry 77struct TlbEntry 78{ 79 public: 80 enum MemoryType { 81 StronglyOrdered, 82 Device, 83 Normal 84 }; 85 enum DomainType { 86 DomainNoAccess = 0, 87 DomainClient, 88 DomainReserved, 89 DomainManager 90 }; 91 92 // Matching variables 93 Addr pfn; 94 Addr size; // Size of this entry, == Type of TLB Rec 95 Addr vpn; // Virtual Page Number 96 uint32_t asid; // Address Space Identifier 97 uint8_t N; // Number of bits in pagesize 98 bool global; 99 bool valid; 100 101 // Type of memory 102 bool nonCacheable; // Can we wrap this in mtype? 103 bool sNp; // Section descriptor 104 105 // Memory Attributes 106 MemoryType mtype; 107 uint8_t innerAttrs; 108 uint8_t outerAttrs; 109 bool shareable; 110 uint32_t attributes; // Memory attributes formatted for PAR 111 112 113 // Access permissions 114 bool xn; // Execute Never 115 uint8_t ap; // Access permissions bits 116 uint8_t domain; // Access Domain 117 118 //Construct an entry that maps to physical address addr for SE mode 119 TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr) 120 { 121 pfn = _paddr >> PageShift; 122 size = PageBytes - 1; 123 asid = _asn; 124 global = false; 125 valid = true; 126 127 vpn = _vaddr >> PageShift; 128 129 nonCacheable = sNp = false; 130 131 xn = 0; 132 ap = 0; // ??? 133 domain = DomainClient; //??? 134 } 135 136 TlbEntry() 137 {} 138 139 void 140 updateVaddr(Addr new_vaddr) 141 { 142 vpn = new_vaddr >> PageShift; 143 } 144 145 Addr 146 pageStart() 147 { 148 return pfn << PageShift; 149 } 150 151 bool 152 match(Addr va, uint8_t cid) 153 { 154 Addr v = vpn << N; 155 if (valid && va >= v && va <= v + size && (global || cid == asid)) 156 return true; 157 return false; 158 } 159 160 Addr 161 pAddr(Addr va) 162 { 163 return (pfn << N) | (va & size); 164 } 165 166 void 167 serialize(std::ostream &os) 168 { 169 SERIALIZE_SCALAR(pfn); 170 SERIALIZE_SCALAR(size); 171 SERIALIZE_SCALAR(vpn); 172 SERIALIZE_SCALAR(asid); 173 SERIALIZE_SCALAR(N); 174 SERIALIZE_SCALAR(global); 175 SERIALIZE_SCALAR(valid); 176 SERIALIZE_SCALAR(nonCacheable); 177 SERIALIZE_SCALAR(sNp); 178 SERIALIZE_ENUM(mtype); 179 SERIALIZE_SCALAR(innerAttrs); 180 SERIALIZE_SCALAR(outerAttrs); 181 SERIALIZE_SCALAR(shareable); 182 SERIALIZE_SCALAR(attributes); 183 SERIALIZE_SCALAR(xn); 184 SERIALIZE_SCALAR(ap); 185 SERIALIZE_SCALAR(domain); 186 } 187 void 188 unserialize(Checkpoint *cp, const std::string §ion) 189 { 190 UNSERIALIZE_SCALAR(pfn); 191 UNSERIALIZE_SCALAR(size); 192 UNSERIALIZE_SCALAR(vpn); 193 UNSERIALIZE_SCALAR(asid); 194 UNSERIALIZE_SCALAR(N); 195 UNSERIALIZE_SCALAR(global); 196 UNSERIALIZE_SCALAR(valid); 197 UNSERIALIZE_SCALAR(nonCacheable); 198 UNSERIALIZE_SCALAR(sNp); 199 UNSERIALIZE_ENUM(mtype); 200 UNSERIALIZE_SCALAR(innerAttrs); 201 UNSERIALIZE_SCALAR(outerAttrs); 202 UNSERIALIZE_SCALAR(shareable); 203 UNSERIALIZE_SCALAR(attributes); 204 UNSERIALIZE_SCALAR(xn); 205 UNSERIALIZE_SCALAR(ap); 206 UNSERIALIZE_SCALAR(domain); 207 } 208 209}; 210 211 212 213}; 214#endif // __ARCH_ARM_PAGETABLE_H__ 215 216