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/*
* 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 "mem/ruby/slicc_interface/RubySlicc_Util.hh"
#include "mem/ruby/system/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);
} else {
m_entries = new Directory_Entry*[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 = floorLog2(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;
}
}
void
DirectoryMemory::printConfig(ostream& out) const
{
out << "DirectoryMemory module config: " << m_name << endl
<< " version: " << m_version << endl
<< " memory_bits: " << m_size_bits << endl
<< " memory_size_bytes: " << m_size_bytes << endl
<< " memory_size_Kbytes: " << double(m_size_bytes) / (1<<10) << endl
<< " memory_size_Mbytes: " << double(m_size_bytes) / (1<<20) << endl
<< " memory_size_Gbytes: " << double(m_size_bytes) / (1<<30) << endl;
}
// Static method
void
DirectoryMemory::printGlobalConfig(ostream & out)
{
out << "DirectoryMemory Global Config: " << endl;
out << " number of directory memories: " << m_num_directories << endl;
if (m_num_directories > 1) {
out << " number of selection bits: " << m_num_directories_bits << endl
<< " selection bits: " << m_numa_high_bit
<< "-" << m_numa_high_bit-m_num_directories_bits
<< endl;
}
out << " total memory size bytes: " << m_total_size_bytes << endl;
out << " total memory bits: " << floorLog2(m_total_size_bytes) << endl;
}
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());
}
Directory_Entry&
DirectoryMemory::lookup(PhysAddress address)
{
assert(isPresent(address));
Directory_Entry* entry;
uint64 idx;
DPRINTF(RubyCache, "Looking up address: %s\n", address);
if (m_use_map) {
if (m_sparseMemory->exist(address)) {
entry = m_sparseMemory->lookup(address);
assert(entry != NULL);
} else {
// Note: SparseMemory internally creates a new Directory Entry
m_sparseMemory->add(address);
entry = m_sparseMemory->lookup(address);
entry->changePermission(AccessPermission_Read_Write);
}
} else {
idx = mapAddressToLocalIdx(address);
assert(idx < m_num_entries);
entry = m_entries[idx];
if (entry == NULL) {
entry = new Directory_Entry();
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::printStats(ostream& out) const
{
if (m_use_map) {
m_sparseMemory->printStats(out);
}
}
DirectoryMemory *
RubyDirectoryMemoryParams::create()
{
return new DirectoryMemory(this);
}
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