abc76f20cb
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
283 lines
7.2 KiB
C++
283 lines
7.2 KiB
C++
/*
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* Copyright (c) 2006 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Kevin Lim
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*/
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#include <sstream>
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#include "cpu/o3/fu_pool.hh"
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#include "cpu/func_unit.hh"
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#include "params/FUPool.hh"
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using namespace std;
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////////////////////////////////////////////////////////////////////////////
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//
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// A pool of function units
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//
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inline void
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FUPool::FUIdxQueue::addFU(int fu_idx)
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{
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funcUnitsIdx.push_back(fu_idx);
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++size;
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}
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inline int
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FUPool::FUIdxQueue::getFU()
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{
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int retval = funcUnitsIdx[idx++];
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if (idx == size)
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idx = 0;
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return retval;
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}
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FUPool::~FUPool()
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{
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fuListIterator i = funcUnits.begin();
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fuListIterator end = funcUnits.end();
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for (; i != end; ++i)
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delete *i;
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}
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// Constructor
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FUPool::FUPool(string name, vector<FUDesc *> paramList)
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: SimObject(name)
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{
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numFU = 0;
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funcUnits.clear();
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for (int i = 0; i < Num_OpClasses; ++i) {
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maxOpLatencies[i] = 0;
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maxIssueLatencies[i] = 0;
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}
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//
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// Iterate through the list of FUDescData structures
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//
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for (FUDDiterator i = paramList.begin(); i != paramList.end(); ++i) {
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//
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// Don't bother with this if we're not going to create any FU's
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//
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if ((*i)->number) {
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//
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// Create the FuncUnit object from this structure
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// - add the capabilities listed in the FU's operation
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// description
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//
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// We create the first unit, then duplicate it as needed
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//
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FuncUnit *fu = new FuncUnit;
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OPDDiterator j = (*i)->opDescList.begin();
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OPDDiterator end = (*i)->opDescList.end();
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for (; j != end; ++j) {
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// indicate that this pool has this capability
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capabilityList.set((*j)->opClass);
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// Add each of the FU's that will have this capability to the
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// appropriate queue.
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for (int k = 0; k < (*i)->number; ++k)
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fuPerCapList[(*j)->opClass].addFU(numFU + k);
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// indicate that this FU has the capability
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fu->addCapability((*j)->opClass, (*j)->opLat, (*j)->issueLat);
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if ((*j)->opLat > maxOpLatencies[(*j)->opClass])
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maxOpLatencies[(*j)->opClass] = (*j)->opLat;
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if ((*j)->issueLat > maxIssueLatencies[(*j)->opClass])
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maxIssueLatencies[(*j)->opClass] = (*j)->issueLat;
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}
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numFU++;
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// Add the appropriate number of copies of this FU to the list
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ostringstream s;
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s << (*i)->name() << "(0)";
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fu->name = s.str();
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funcUnits.push_back(fu);
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for (int c = 1; c < (*i)->number; ++c) {
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ostringstream s;
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numFU++;
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FuncUnit *fu2 = new FuncUnit(*fu);
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s << (*i)->name() << "(" << c << ")";
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fu2->name = s.str();
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funcUnits.push_back(fu2);
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}
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}
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}
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unitBusy.resize(numFU);
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for (int i = 0; i < numFU; i++) {
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unitBusy[i] = false;
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}
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}
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void
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FUPool::annotateMemoryUnits(unsigned hit_latency)
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{
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maxOpLatencies[MemReadOp] = hit_latency;
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fuListIterator i = funcUnits.begin();
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fuListIterator iend = funcUnits.end();
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for (; i != iend; ++i) {
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if ((*i)->provides(MemReadOp))
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(*i)->opLatency(MemReadOp) = hit_latency;
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if ((*i)->provides(MemWriteOp))
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(*i)->opLatency(MemWriteOp) = hit_latency;
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}
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}
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int
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FUPool::getUnit(OpClass capability)
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{
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// If this pool doesn't have the specified capability,
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// return this information to the caller
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if (!capabilityList[capability])
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return -2;
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int fu_idx = fuPerCapList[capability].getFU();
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int start_idx = fu_idx;
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// Iterate through the circular queue if needed, stopping if we've reached
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// the first element again.
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while (unitBusy[fu_idx]) {
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fu_idx = fuPerCapList[capability].getFU();
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if (fu_idx == start_idx) {
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// No FU available
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return -1;
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}
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}
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assert(fu_idx < numFU);
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unitBusy[fu_idx] = true;
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return fu_idx;
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}
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void
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FUPool::freeUnitNextCycle(int fu_idx)
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{
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assert(unitBusy[fu_idx]);
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unitsToBeFreed.push_back(fu_idx);
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}
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void
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FUPool::processFreeUnits()
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{
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while (!unitsToBeFreed.empty()) {
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int fu_idx = unitsToBeFreed.back();
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unitsToBeFreed.pop_back();
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assert(unitBusy[fu_idx]);
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unitBusy[fu_idx] = false;
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}
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}
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void
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FUPool::dump()
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{
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cout << "Function Unit Pool (" << name() << ")\n";
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cout << "======================================\n";
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cout << "Free List:\n";
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for (int i = 0; i < numFU; ++i) {
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if (unitBusy[i]) {
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continue;
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}
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cout << " [" << i << "] : ";
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cout << funcUnits[i]->name << " ";
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cout << "\n";
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}
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cout << "======================================\n";
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cout << "Busy List:\n";
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for (int i = 0; i < numFU; ++i) {
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if (!unitBusy[i]) {
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continue;
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}
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cout << " [" << i << "] : ";
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cout << funcUnits[i]->name << " ";
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cout << "\n";
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}
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}
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void
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FUPool::switchOut()
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{
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}
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void
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FUPool::takeOverFrom()
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{
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for (int i = 0; i < numFU; i++) {
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unitBusy[i] = false;
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}
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unitsToBeFreed.clear();
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}
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//
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////////////////////////////////////////////////////////////////////////////
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//
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// The SimObjects we use to get the FU information into the simulator
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//
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////////////////////////////////////////////////////////////////////////////
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//
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// FUPool - Contails a list of FUDesc objects to make available
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//
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//
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// The FuPool object
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//
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FUPool *
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FUPoolParams::create()
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{
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return new FUPool(name, FUList);
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}
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