1/* 2 * Copyright (c) 2003 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Steve Reinhardt 29 * Ron Dreslinski
| 1/* 2 * Copyright (c) 2003 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Steve Reinhardt 29 * Ron Dreslinski
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| 30 * Ali Saidi
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30 */ 31 32/** 33 * @file 34 * Definitions of page table. 35 */ 36#include <string> 37#include <map> 38#include <fstream> 39 40#include "arch/faults.hh" 41#include "base/bitfield.hh" 42#include "base/intmath.hh" 43#include "base/trace.hh" 44#include "mem/page_table.hh" 45#include "sim/builder.hh" 46#include "sim/sim_object.hh" 47#include "sim/system.hh" 48 49using namespace std; 50using namespace TheISA; 51 52PageTable::PageTable(System *_system, Addr _pageSize) 53 : pageSize(_pageSize), offsetMask(mask(floorLog2(_pageSize))), 54 system(_system) 55{ 56 assert(isPowerOf2(pageSize)); 57 pTableCache[0].vaddr = 0; 58 pTableCache[1].vaddr = 0; 59 pTableCache[2].vaddr = 0; 60} 61 62PageTable::~PageTable() 63{ 64} 65 66Fault 67PageTable::page_check(Addr addr, int64_t size) const 68{ 69 if (size < sizeof(uint64_t)) { 70 if (!isPowerOf2(size)) { 71 panic("Invalid request size!\n"); 72 return genMachineCheckFault(); 73 } 74 75 if ((size - 1) & addr) 76 return genAlignmentFault(); 77 } 78 else { 79 if ((addr & (VMPageSize - 1)) + size > VMPageSize) { 80 panic("Invalid request size!\n"); 81 return genMachineCheckFault(); 82 } 83 84 if ((sizeof(uint64_t) - 1) & addr) 85 return genAlignmentFault(); 86 } 87 88 return NoFault; 89} 90 91 92 93 94void 95PageTable::allocate(Addr vaddr, int64_t size) 96{ 97 // starting address must be page aligned 98 assert(pageOffset(vaddr) == 0); 99
| 31 */ 32 33/** 34 * @file 35 * Definitions of page table. 36 */ 37#include <string> 38#include <map> 39#include <fstream> 40 41#include "arch/faults.hh" 42#include "base/bitfield.hh" 43#include "base/intmath.hh" 44#include "base/trace.hh" 45#include "mem/page_table.hh" 46#include "sim/builder.hh" 47#include "sim/sim_object.hh" 48#include "sim/system.hh" 49 50using namespace std; 51using namespace TheISA; 52 53PageTable::PageTable(System *_system, Addr _pageSize) 54 : pageSize(_pageSize), offsetMask(mask(floorLog2(_pageSize))), 55 system(_system) 56{ 57 assert(isPowerOf2(pageSize)); 58 pTableCache[0].vaddr = 0; 59 pTableCache[1].vaddr = 0; 60 pTableCache[2].vaddr = 0; 61} 62 63PageTable::~PageTable() 64{ 65} 66 67Fault 68PageTable::page_check(Addr addr, int64_t size) const 69{ 70 if (size < sizeof(uint64_t)) { 71 if (!isPowerOf2(size)) { 72 panic("Invalid request size!\n"); 73 return genMachineCheckFault(); 74 } 75 76 if ((size - 1) & addr) 77 return genAlignmentFault(); 78 } 79 else { 80 if ((addr & (VMPageSize - 1)) + size > VMPageSize) { 81 panic("Invalid request size!\n"); 82 return genMachineCheckFault(); 83 } 84 85 if ((sizeof(uint64_t) - 1) & addr) 86 return genAlignmentFault(); 87 } 88 89 return NoFault; 90} 91 92 93 94 95void 96PageTable::allocate(Addr vaddr, int64_t size) 97{ 98 // starting address must be page aligned 99 assert(pageOffset(vaddr) == 0); 100
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| 101 DPRINTF(MMU, "Allocating Page: %#x-%#x\n", vaddr, vaddr+ size); 102
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100 for (; size > 0; size -= pageSize, vaddr += pageSize) { 101 m5::hash_map<Addr,Addr>::iterator iter = pTable.find(vaddr); 102 103 if (iter != pTable.end()) { 104 // already mapped 105 fatal("PageTable::allocate: address 0x%x already mapped", vaddr); 106 } 107 108 pTable[vaddr] = system->new_page(); 109 pTableCache[2].paddr = pTableCache[1].paddr; 110 pTableCache[2].vaddr = pTableCache[1].vaddr; 111 pTableCache[1].paddr = pTableCache[0].paddr; 112 pTableCache[1].vaddr = pTableCache[0].vaddr; 113 pTableCache[0].paddr = pTable[vaddr]; 114 pTableCache[0].vaddr = vaddr; 115 } 116} 117 118 119 120bool 121PageTable::translate(Addr vaddr, Addr &paddr) 122{ 123 Addr page_addr = pageAlign(vaddr); 124 paddr = 0; 125 126 if (pTableCache[0].vaddr == vaddr) { 127 paddr = pTableCache[0].paddr; 128 return true; 129 } 130 if (pTableCache[1].vaddr == vaddr) { 131 paddr = pTableCache[1].paddr; 132 return true; 133 } 134 if (pTableCache[2].vaddr == vaddr) { 135 paddr = pTableCache[2].paddr; 136 return true; 137 } 138 139 m5::hash_map<Addr,Addr>::iterator iter = pTable.find(page_addr); 140 141 if (iter == pTable.end()) { 142 return false; 143 } 144 145 paddr = iter->second + pageOffset(vaddr); 146 return true; 147} 148 149 150Fault 151PageTable::translate(RequestPtr &req) 152{ 153 Addr paddr; 154 assert(pageAlign(req->getVaddr() + req->getSize() - 1) 155 == pageAlign(req->getVaddr())); 156 if (!translate(req->getVaddr(), paddr)) { 157 return genPageTableFault(req->getVaddr()); 158 } 159 req->setPaddr(paddr); 160 return page_check(req->getPaddr(), req->getSize()); 161}
| 103 for (; size > 0; size -= pageSize, vaddr += pageSize) { 104 m5::hash_map<Addr,Addr>::iterator iter = pTable.find(vaddr); 105 106 if (iter != pTable.end()) { 107 // already mapped 108 fatal("PageTable::allocate: address 0x%x already mapped", vaddr); 109 } 110 111 pTable[vaddr] = system->new_page(); 112 pTableCache[2].paddr = pTableCache[1].paddr; 113 pTableCache[2].vaddr = pTableCache[1].vaddr; 114 pTableCache[1].paddr = pTableCache[0].paddr; 115 pTableCache[1].vaddr = pTableCache[0].vaddr; 116 pTableCache[0].paddr = pTable[vaddr]; 117 pTableCache[0].vaddr = vaddr; 118 } 119} 120 121 122 123bool 124PageTable::translate(Addr vaddr, Addr &paddr) 125{ 126 Addr page_addr = pageAlign(vaddr); 127 paddr = 0; 128 129 if (pTableCache[0].vaddr == vaddr) { 130 paddr = pTableCache[0].paddr; 131 return true; 132 } 133 if (pTableCache[1].vaddr == vaddr) { 134 paddr = pTableCache[1].paddr; 135 return true; 136 } 137 if (pTableCache[2].vaddr == vaddr) { 138 paddr = pTableCache[2].paddr; 139 return true; 140 } 141 142 m5::hash_map<Addr,Addr>::iterator iter = pTable.find(page_addr); 143 144 if (iter == pTable.end()) { 145 return false; 146 } 147 148 paddr = iter->second + pageOffset(vaddr); 149 return true; 150} 151 152 153Fault 154PageTable::translate(RequestPtr &req) 155{ 156 Addr paddr; 157 assert(pageAlign(req->getVaddr() + req->getSize() - 1) 158 == pageAlign(req->getVaddr())); 159 if (!translate(req->getVaddr(), paddr)) { 160 return genPageTableFault(req->getVaddr()); 161 } 162 req->setPaddr(paddr); 163 return page_check(req->getPaddr(), req->getSize()); 164}
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| 165 166void 167PageTable::serialize(std::ostream &os) 168{ 169 paramOut(os, "ptable.size", pTable.size()); 170 int count = 0; 171 172 m5::hash_map<Addr,Addr>::iterator iter; 173 while (iter != pTable.end()) { 174 paramOut(os, csprintf("ptable.entry%dvaddr", count),iter->first); 175 paramOut(os, csprintf("ptable.entry%dpaddr", count),iter->second); 176 ++count; 177 } 178 assert(count == pTable.size()); 179} 180 181void 182PageTable::unserialize(Checkpoint *cp, const std::string §ion) 183{ 184 int i = 0, count; 185 paramIn(cp, section, "ptable.size", count); 186 Addr vaddr, paddr; 187 188 pTable.clear(); 189 190 while(i < count) { 191 paramIn(cp, section, csprintf("ptable.entry%dvaddr", i), vaddr); 192 paramIn(cp, section, csprintf("ptable.entry%dpaddr", i), paddr); 193 pTable[vaddr] = paddr; 194 ++i; 195 } 196 197} 198
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