90 lines
3.1 KiB
C++
90 lines
3.1 KiB
C++
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/*
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* Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* For use for simulation and test purposes only
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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 met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* Author: Brad Beckmann, Sooraj Puthoor
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*/
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#ifndef __FETCH_UNIT_HH__
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#define __FETCH_UNIT_HH__
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#include <string>
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#include <utility>
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#include <vector>
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#include "arch/gpu_decoder.hh"
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#include "base/statistics.hh"
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#include "config/the_gpu_isa.hh"
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#include "gpu-compute/scheduler.hh"
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#include "mem/packet.hh"
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class ComputeUnit;
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class Wavefront;
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class FetchUnit
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{
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public:
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FetchUnit(const ComputeUnitParams* params);
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~FetchUnit();
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void init(ComputeUnit *cu);
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void exec();
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void bindWaveList(std::vector<Wavefront*> *list);
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void initiateFetch(Wavefront *wavefront);
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void fetch(PacketPtr pkt, Wavefront *wavefront);
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void processFetchReturn(PacketPtr pkt);
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static uint32_t globalFetchUnitID;
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private:
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bool timingSim;
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ComputeUnit *computeUnit;
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TheGpuISA::Decoder decoder;
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// Fetch scheduler; Selects one wave from
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// the fetch queue for instruction fetching.
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// The selection is made according to
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// a scheduling policy
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Scheduler fetchScheduler;
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// Stores the list of waves that are
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// ready to be fetched this cycle
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std::vector<Wavefront*> fetchQueue;
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// Stores the fetch status of all waves dispatched to this SIMD.
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// TRUE implies the wave is ready to fetch and is already
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// moved to fetchQueue
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std::vector<std::pair<Wavefront*, bool>> fetchStatusQueue;
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// Pointer to list of waves dispatched on to this SIMD unit
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std::vector<Wavefront*> *waveList;
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};
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#endif // __FETCH_UNIT_HH__
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