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Diffstat (limited to 'src/mem/ruby/structures/DirectoryMemory.cc')
| -rw-r--r-- | src/mem/ruby/structures/DirectoryMemory.cc | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/mem/ruby/structures/DirectoryMemory.cc b/src/mem/ruby/structures/DirectoryMemory.cc new file mode 100644 index 000000000..db165460c --- /dev/null +++ b/src/mem/ruby/structures/DirectoryMemory.cc @@ -0,0 +1,212 @@ +/* + * 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)); + + Index 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); +} |