| /* |
| * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution; |
| * neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "base/intmath.hh" |
| #include "debug/RubyCache.hh" |
| #include "debug/RubyStats.hh" |
| #include "mem/ruby/slicc_interface/RubySlicc_Util.hh" |
| #include "mem/ruby/structures/DirectoryMemory.hh" |
| #include "mem/ruby/system/System.hh" |
| |
| using namespace std; |
| |
| int DirectoryMemory::m_num_directories = 0; |
| int DirectoryMemory::m_num_directories_bits = 0; |
| uint64_t DirectoryMemory::m_total_size_bytes = 0; |
| int DirectoryMemory::m_numa_high_bit = 0; |
| |
| DirectoryMemory::DirectoryMemory(const Params *p) |
| : SimObject(p) |
| { |
| m_version = p->version; |
| m_size_bytes = p->size; |
| m_size_bits = floorLog2(m_size_bytes); |
| m_num_entries = 0; |
| m_use_map = p->use_map; |
| m_map_levels = p->map_levels; |
| m_numa_high_bit = p->numa_high_bit; |
| } |
| |
| void |
| DirectoryMemory::init() |
| { |
| m_num_entries = m_size_bytes / RubySystem::getBlockSizeBytes(); |
| |
| if (m_use_map) { |
| m_sparseMemory = new SparseMemory(m_map_levels); |
| g_system_ptr->registerSparseMemory(m_sparseMemory); |
| } else { |
| m_entries = new AbstractEntry*[m_num_entries]; |
| for (int i = 0; i < m_num_entries; i++) |
| m_entries[i] = NULL; |
| m_ram = g_system_ptr->getMemoryVector(); |
| } |
| |
| m_num_directories++; |
| m_num_directories_bits = ceilLog2(m_num_directories); |
| m_total_size_bytes += m_size_bytes; |
| |
| if (m_numa_high_bit == 0) { |
| m_numa_high_bit = RubySystem::getMemorySizeBits() - 1; |
| } |
| assert(m_numa_high_bit != 0); |
| } |
| |
| DirectoryMemory::~DirectoryMemory() |
| { |
| // free up all the directory entries |
| if (m_entries != NULL) { |
| for (uint64 i = 0; i < m_num_entries; i++) { |
| if (m_entries[i] != NULL) { |
| delete m_entries[i]; |
| } |
| } |
| delete [] m_entries; |
| } else if (m_use_map) { |
| delete m_sparseMemory; |
| } |
| } |
| |
| uint64 |
| DirectoryMemory::mapAddressToDirectoryVersion(PhysAddress address) |
| { |
| if (m_num_directories_bits == 0) |
| return 0; |
| |
| uint64 ret = address.bitSelect(m_numa_high_bit - m_num_directories_bits + 1, |
| m_numa_high_bit); |
| return ret; |
| } |
| |
| bool |
| DirectoryMemory::isPresent(PhysAddress address) |
| { |
| bool ret = (mapAddressToDirectoryVersion(address) == m_version); |
| return ret; |
| } |
| |
| uint64 |
| DirectoryMemory::mapAddressToLocalIdx(PhysAddress address) |
| { |
| uint64 ret; |
| if (m_num_directories_bits > 0) { |
| ret = address.bitRemove(m_numa_high_bit - m_num_directories_bits + 1, |
| m_numa_high_bit); |
| } else { |
| ret = address.getAddress(); |
| } |
| |
| return ret >> (RubySystem::getBlockSizeBits()); |
| } |
| |
| AbstractEntry* |
| DirectoryMemory::lookup(PhysAddress address) |
| { |
| assert(isPresent(address)); |
| DPRINTF(RubyCache, "Looking up address: %s\n", address); |
| |
| if (m_use_map) { |
| return m_sparseMemory->lookup(address); |
| } else { |
| uint64_t idx = mapAddressToLocalIdx(address); |
| assert(idx < m_num_entries); |
| return m_entries[idx]; |
| } |
| } |
| |
| AbstractEntry* |
| DirectoryMemory::allocate(const PhysAddress& address, AbstractEntry* entry) |
| { |
| assert(isPresent(address)); |
| uint64 idx; |
| DPRINTF(RubyCache, "Looking up address: %s\n", address); |
| |
| if (m_use_map) { |
| m_sparseMemory->add(address, entry); |
| entry->changePermission(AccessPermission_Read_Write); |
| } else { |
| idx = mapAddressToLocalIdx(address); |
| assert(idx < m_num_entries); |
| entry->getDataBlk().assign(m_ram->getBlockPtr(address)); |
| entry->changePermission(AccessPermission_Read_Only); |
| m_entries[idx] = entry; |
| } |
| |
| return entry; |
| } |
| |
| void |
| DirectoryMemory::invalidateBlock(PhysAddress address) |
| { |
| if (m_use_map) { |
| assert(m_sparseMemory->exist(address)); |
| m_sparseMemory->remove(address); |
| } |
| #if 0 |
| else { |
| assert(isPresent(address)); |
| |
| int64 index = address.memoryModuleIndex(); |
| |
| if (index < 0 || index > m_size) { |
| ERROR_MSG("Directory Memory Assertion: " |
| "accessing memory out of range."); |
| } |
| |
| if (m_entries[index] != NULL){ |
| delete m_entries[index]; |
| m_entries[index] = NULL; |
| } |
| } |
| #endif |
| } |
| |
| void |
| DirectoryMemory::print(ostream& out) const |
| { |
| } |
| |
| void |
| DirectoryMemory::regStats() |
| { |
| if (m_use_map) { |
| m_sparseMemory->regStats(name()); |
| } |
| } |
| |
| void |
| DirectoryMemory::recordRequestType(DirectoryRequestType requestType) { |
| DPRINTF(RubyStats, "Recorded statistic: %s\n", |
| DirectoryRequestType_to_string(requestType)); |
| } |
| |
| DirectoryMemory * |
| RubyDirectoryMemoryParams::create() |
| { |
| return new DirectoryMemory(this); |
| } |