DirectoryMemory.cc revision 6903
1 2/* 3 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30/* 31 * DirectoryMemory.cc 32 * 33 * Description: See DirectoryMemory.hh 34 * 35 * $Id$ 36 * 37 */ 38 39#include "mem/ruby/system/System.hh" 40#include "mem/ruby/system/DirectoryMemory.hh" 41#include "mem/ruby/slicc_interface/RubySlicc_Util.hh" 42#include "mem/gems_common/util.hh" 43 44int DirectoryMemory::m_num_directories = 0; 45int DirectoryMemory::m_num_directories_bits = 0; 46uint64_t DirectoryMemory::m_total_size_bytes = 0; 47 48DirectoryMemory::DirectoryMemory(const Params *p) 49 : SimObject(p) 50{ 51 m_version = p->version; 52 m_size_bytes = p->size; 53 m_size_bits = log_int(m_size_bytes); 54} 55 56void DirectoryMemory::init() 57{ 58 m_num_entries = m_size_bytes / RubySystem::getBlockSizeBytes(); 59 m_entries = new Directory_Entry*[m_num_entries]; 60 for (int i=0; i < m_num_entries; i++) 61 m_entries[i] = NULL; 62 63 m_ram = g_system_ptr->getMemoryVector(); 64 65 m_num_directories++; 66 m_num_directories_bits = log_int(m_num_directories); 67 m_total_size_bytes += m_size_bytes; 68} 69 70DirectoryMemory::~DirectoryMemory() 71{ 72 // free up all the directory entries 73 for (uint64 i=0;i<m_num_entries;i++) { 74 if (m_entries[i] != NULL) { 75 delete m_entries[i]; 76 } 77 } 78 if (m_entries != NULL) { 79 delete [] m_entries; 80 } 81} 82 83void DirectoryMemory::printConfig(ostream& out) const 84{ 85 out << "DirectoryMemory module config: " << m_name << endl; 86 out << " version: " << m_version << endl; 87 out << " memory_bits: " << m_size_bits << endl; 88 out << " memory_size_bytes: " << m_size_bytes << endl; 89 out << " memory_size_Kbytes: " << double(m_size_bytes) / (1<<10) << endl; 90 out << " memory_size_Mbytes: " << double(m_size_bytes) / (1<<20) << endl; 91 out << " memory_size_Gbytes: " << double(m_size_bytes) / (1<<30) << endl; 92} 93 94// Static method 95void DirectoryMemory::printGlobalConfig(ostream & out) 96{ 97 out << "DirectoryMemory Global Config: " << endl; 98 out << " number of directory memories: " << m_num_directories << endl; 99 if (m_num_directories > 1) { 100 out << " number of selection bits: " << m_num_directories_bits << endl; 101 out << " selection bits: " << RubySystem::getBlockSizeBits()+m_num_directories_bits-1 102 << "-" << RubySystem::getBlockSizeBits() << endl; 103 } 104 out << " total memory size bytes: " << m_total_size_bytes << endl; 105 out << " total memory size bits: " << log_int(m_total_size_bytes) << endl; 106 107} 108 109int DirectoryMemory::mapAddressToDirectoryVersion(PhysAddress address) 110{ 111 if (m_num_directories_bits == 0) return 0; 112 int ret = address.bitSelect(RubySystem::getBlockSizeBits(), 113 RubySystem::getBlockSizeBits()+m_num_directories_bits-1); 114 return ret; 115} 116 117// Public method 118bool DirectoryMemory::isPresent(PhysAddress address) 119{ 120 bool ret = (mapAddressToDirectoryVersion(address) == m_version); 121 return ret; 122} 123 124int DirectoryMemory::mapAddressToLocalIdx(PhysAddress address) 125{ 126 int ret = address.getAddress() >> (RubySystem::getBlockSizeBits() + m_num_directories_bits); 127 return ret; 128} 129 130Directory_Entry& DirectoryMemory::lookup(PhysAddress address) 131{ 132 assert(isPresent(address)); 133 Directory_Entry* entry; 134 int idx = mapAddressToLocalIdx(address); 135 entry = m_entries[idx]; 136 if (entry == NULL) { 137 entry = new Directory_Entry; 138 entry->getDataBlk().assign(m_ram->getBlockPtr(address)); 139 m_entries[idx] = entry; 140 } 141 return (*entry); 142} 143/* 144Directory_Entry& DirectoryMemory::lookup(PhysAddress address) 145{ 146 assert(isPresent(address)); 147 Index index = address.memoryModuleIndex(); 148 149 if (index < 0 || index > m_size) { 150 WARN_EXPR(address.getAddress()); 151 WARN_EXPR(index); 152 WARN_EXPR(m_size); 153 ERROR_MSG("Directory Memory Assertion: accessing memory out of range."); 154 } 155 Directory_Entry* entry = m_entries[index]; 156 157 // allocate the directory entry on demand. 158 if (entry == NULL) { 159 entry = new Directory_Entry; 160 entry->getDataBlk().assign(m_ram->getBlockPtr(address)); 161 162 // store entry to the table 163 m_entries[index] = entry; 164 } 165 166 return (*entry); 167} 168*/ 169 170void DirectoryMemory::invalidateBlock(PhysAddress address) 171{ 172 /* 173 assert(isPresent(address)); 174 175 Index index = address.memoryModuleIndex(); 176 177 if (index < 0 || index > m_size) { 178 ERROR_MSG("Directory Memory Assertion: accessing memory out of range."); 179 } 180 181 if(m_entries[index] != NULL){ 182 delete m_entries[index]; 183 m_entries[index] = NULL; 184 } 185 */ 186} 187 188void DirectoryMemory::print(ostream& out) const 189{ 190 191} 192 193DirectoryMemory * 194RubyDirectoryMemoryParams::create() 195{ 196 return new DirectoryMemory(this); 197} 198