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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 "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_numa_high_bit = p->numa_high_bit;
}
void
DirectoryMemory::init()
{
m_num_entries = m_size_bytes / RubySystem::getBlockSizeBytes();
m_entries = new AbstractEntry*[m_num_entries];
for (int i = 0; i < m_num_entries; i++)
m_entries[i] = NULL;
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
for (uint64 i = 0; i < m_num_entries; i++) {
if (m_entries[i] != NULL) {
delete m_entries[i];
}
}
delete [] m_entries;
}
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);
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);
idx = mapAddressToLocalIdx(address);
assert(idx < m_num_entries);
entry->changePermission(AccessPermission_Read_Only);
m_entries[idx] = entry;
return entry;
}
void
DirectoryMemory::print(ostream& out) const
{
}
void
DirectoryMemory::recordRequestType(DirectoryRequestType requestType) {
DPRINTF(RubyStats, "Recorded statistic: %s\n",
DirectoryRequestType_to_string(requestType));
}
DirectoryMemory *
RubyDirectoryMemoryParams::create()
{
return new DirectoryMemory(this);
}
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