DirectoryMemory.cc revision 11118:75c1e564a725
1/* 2 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 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 29#include "base/intmath.hh" 30#include "debug/RubyCache.hh" 31#include "debug/RubyStats.hh" 32#include "mem/ruby/slicc_interface/RubySlicc_Util.hh" 33#include "mem/ruby/structures/DirectoryMemory.hh" 34#include "mem/ruby/system/RubySystem.hh" 35 36using namespace std; 37 38int DirectoryMemory::m_num_directories = 0; 39int DirectoryMemory::m_num_directories_bits = 0; 40int DirectoryMemory::m_numa_high_bit = 0; 41 42DirectoryMemory::DirectoryMemory(const Params *p) 43 : SimObject(p) 44{ 45 m_version = p->version; 46 m_size_bytes = p->size; 47 m_size_bits = floorLog2(m_size_bytes); 48 m_num_entries = 0; 49 m_numa_high_bit = p->numa_high_bit; 50} 51 52void 53DirectoryMemory::init() 54{ 55 m_num_entries = m_size_bytes / RubySystem::getBlockSizeBytes(); 56 m_entries = new AbstractEntry*[m_num_entries]; 57 for (int i = 0; i < m_num_entries; i++) 58 m_entries[i] = NULL; 59 60 m_num_directories++; 61 m_num_directories_bits = ceilLog2(m_num_directories); 62 63 if (m_numa_high_bit == 0) { 64 m_numa_high_bit = RubySystem::getMemorySizeBits() - 1; 65 } 66 assert(m_numa_high_bit != 0); 67} 68 69DirectoryMemory::~DirectoryMemory() 70{ 71 // free up all the directory entries 72 for (uint64_t i = 0; i < m_num_entries; i++) { 73 if (m_entries[i] != NULL) { 74 delete m_entries[i]; 75 } 76 } 77 delete [] m_entries; 78} 79 80uint64_t 81DirectoryMemory::mapAddressToDirectoryVersion(Addr address) 82{ 83 if (m_num_directories_bits == 0) 84 return 0; 85 86 uint64_t ret = bitSelect(address, 87 m_numa_high_bit - m_num_directories_bits + 1, 88 m_numa_high_bit); 89 return ret; 90} 91 92bool 93DirectoryMemory::isPresent(Addr address) 94{ 95 bool ret = (mapAddressToDirectoryVersion(address) == m_version); 96 return ret; 97} 98 99uint64_t 100DirectoryMemory::mapAddressToLocalIdx(Addr address) 101{ 102 uint64_t ret; 103 if (m_num_directories_bits > 0) { 104 ret = bitRemove(address, m_numa_high_bit - m_num_directories_bits + 1, 105 m_numa_high_bit); 106 } else { 107 ret = address; 108 } 109 110 return ret >> (RubySystem::getBlockSizeBits()); 111} 112 113AbstractEntry* 114DirectoryMemory::lookup(Addr address) 115{ 116 assert(isPresent(address)); 117 DPRINTF(RubyCache, "Looking up address: %#x\n", address); 118 119 uint64_t idx = mapAddressToLocalIdx(address); 120 assert(idx < m_num_entries); 121 return m_entries[idx]; 122} 123 124AbstractEntry* 125DirectoryMemory::allocate(Addr address, AbstractEntry *entry) 126{ 127 assert(isPresent(address)); 128 uint64_t idx; 129 DPRINTF(RubyCache, "Looking up address: %#x\n", address); 130 131 idx = mapAddressToLocalIdx(address); 132 assert(idx < m_num_entries); 133 entry->changePermission(AccessPermission_Read_Only); 134 m_entries[idx] = entry; 135 136 return entry; 137} 138 139void 140DirectoryMemory::print(ostream& out) const 141{ 142} 143 144void 145DirectoryMemory::recordRequestType(DirectoryRequestType requestType) { 146 DPRINTF(RubyStats, "Recorded statistic: %s\n", 147 DirectoryRequestType_to_string(requestType)); 148} 149 150DirectoryMemory * 151RubyDirectoryMemoryParams::create() 152{ 153 return new DirectoryMemory(this); 154} 155