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Diffstat (limited to 'cpu/o3/fu_pool.hh')
| -rw-r--r-- | cpu/o3/fu_pool.hh | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/cpu/o3/fu_pool.hh b/cpu/o3/fu_pool.hh deleted file mode 100644 index 052e4832d..000000000 --- a/cpu/o3/fu_pool.hh +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (c) 2002-2005 The Regents of The University of Michigan - * 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. - */ - -#ifndef __CPU_O3_FU_POOL_HH__ -#define __CPU_O3_FU_POOL_HH__ - -#include <bitset> -#include <list> -#include <string> -#include <vector> - -#include "base/sched_list.hh" -#include "encumbered/cpu/full/op_class.hh" -#include "sim/sim_object.hh" - -class FUDesc; -class FuncUnit; - -/** - * Pool of FU's, specific to the new CPU model. The old FU pool had lists of - * free units and busy units, and whenever a FU was needed it would iterate - * through the free units to find a FU that provided the capability. This pool - * has lists of units specific to each of the capabilities, and whenever a FU - * is needed, it iterates through that list to find a free unit. The previous - * FU pool would have to be ticked each cycle to update which units became - * free. This FU pool lets the IEW stage handle freeing units, which frees - * them as their scheduled execution events complete. This limits units in this - * model to either have identical issue and op latencies, or 1 cycle issue - * latencies. - */ -class FUPool : public SimObject -{ - private: - /** Maximum op execution latencies, per op class. */ - unsigned maxOpLatencies[Num_OpClasses]; - /** Maximum issue latencies, per op class. */ - unsigned maxIssueLatencies[Num_OpClasses]; - - /** Bitvector listing capabilities of this FU pool. */ - std::bitset<Num_OpClasses> capabilityList; - - /** Bitvector listing which FUs are busy. */ - std::vector<bool> unitBusy; - - /** List of units to be freed at the end of this cycle. */ - std::vector<int> unitsToBeFreed; - - /** - * Class that implements a circular queue to hold FU indices. The hope is - * that FUs that have been just used will be moved to the end of the queue - * by iterating through it, thus leaving free units at the head of the - * queue. - */ - class FUIdxQueue { - public: - /** Constructs a circular queue of FU indices. */ - FUIdxQueue() - : idx(0), size(0) - { } - - /** Adds a FU to the queue. */ - inline void addFU(int fu_idx); - - /** Returns the index of the FU at the head of the queue, and changes - * the index to the next element. - */ - inline int getFU(); - - private: - /** Circular queue index. */ - int idx; - - /** Size of the queue. */ - int size; - - /** Queue of FU indices. */ - std::vector<int> funcUnitsIdx; - }; - - /** Per op class queues of FUs that provide that capability. */ - FUIdxQueue fuPerCapList[Num_OpClasses]; - - /** Number of FUs. */ - int numFU; - - /** Functional units. */ - std::vector<FuncUnit *> funcUnits; - - typedef std::vector<FuncUnit *>::iterator fuListIterator; - - public: - - /** Constructs a FU pool. */ - FUPool(std::string name, std::vector<FUDesc *> l); - ~FUPool(); - - /** Annotates units that provide memory operations. Included only because - * old FU pool provided this function. - */ - void annotateMemoryUnits(unsigned hit_latency); - - /** - * Gets a FU providing the requested capability. Will mark the unit as busy, - * but leaves the freeing of the unit up to the IEW stage. - * @param capability The capability requested. - * @return Returns -2 if the FU pool does not have the capability, -1 if - * there is no free FU, and the FU's index otherwise. - */ - int getUnit(OpClass capability); - - /** Frees a FU at the end of this cycle. */ - void freeUnitNextCycle(int fu_idx); - - /** Frees all FUs on the list. */ - void processFreeUnits(); - - /** Returns the total number of FUs. */ - int size() { return numFU; } - - /** Debugging function used to dump FU information. */ - void dump(); - - /** Returns the operation execution latency of the given capability. */ - unsigned getOpLatency(OpClass capability) { - return maxOpLatencies[capability]; - } - - /** Returns the issue latency of the given capability. */ - unsigned getIssueLatency(OpClass capability) { - return maxIssueLatencies[capability]; - } - - /** Switches out functional unit pool. */ - void switchOut(); - - /** Takes over from another CPU's thread. */ - void takeOverFrom(); -}; - -#endif // __CPU_O3_FU_POOL_HH__ |