blob: e2ee0fc549bf5cbaa6bdae3452b3b67e3dcfdf67 [file] [log] [blame]
/*
* Copyright (c) 2017 ARM Limited
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
* Copyright (c) 2017 Google Inc.
* 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 "mem/ruby/structures/DirectoryMemory.hh"
#include "base/addr_range.hh"
#include "base/intmath.hh"
#include "debug/RubyCache.hh"
#include "debug/RubyStats.hh"
#include "mem/ruby/slicc_interface/RubySlicc_Util.hh"
#include "mem/ruby/system/RubySystem.hh"
#include "sim/system.hh"
using namespace std;
DirectoryMemory::DirectoryMemory(const Params *p)
: SimObject(p), addrRanges(p->addr_ranges.begin(), p->addr_ranges.end())
{
m_size_bytes = 0;
for (const auto &r: addrRanges) {
m_size_bytes += r.size();
}
m_size_bits = floorLog2(m_size_bytes);
m_num_entries = 0;
}
void
DirectoryMemory::init()
{
m_num_entries = m_size_bytes / RubySystem::getBlockSizeBytes();
m_entries = new AbstractCacheEntry*[m_num_entries];
for (int i = 0; i < m_num_entries; i++)
m_entries[i] = NULL;
}
DirectoryMemory::~DirectoryMemory()
{
// free up all the directory entries
for (uint64_t i = 0; i < m_num_entries; i++) {
if (m_entries[i] != NULL) {
delete m_entries[i];
}
}
delete [] m_entries;
}
bool
DirectoryMemory::isPresent(Addr address)
{
for (const auto& r: addrRanges) {
if (r.contains(address)) {
return true;
}
}
return false;
}
uint64_t
DirectoryMemory::mapAddressToLocalIdx(Addr address)
{
uint64_t ret = 0;
for (const auto& r: addrRanges) {
if (r.contains(address)) {
ret += r.getOffset(address);
break;
}
ret += r.size();
}
return ret >> RubySystem::getBlockSizeBits();
}
AbstractCacheEntry*
DirectoryMemory::lookup(Addr address)
{
assert(isPresent(address));
DPRINTF(RubyCache, "Looking up address: %#x\n", address);
uint64_t idx = mapAddressToLocalIdx(address);
assert(idx < m_num_entries);
return m_entries[idx];
}
AbstractCacheEntry*
DirectoryMemory::allocate(Addr address, AbstractCacheEntry *entry)
{
assert(isPresent(address));
uint64_t idx;
DPRINTF(RubyCache, "Looking up address: %#x\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);
}