9313294efe
Remove the line "For use for simulation and test purposes only" in files were AMD is the only copyright holder listed in the header. This happens to be the case for all files where this line exists, removing it completely from gem5. Change-Id: I623f266b002f564301b28774f49081099cfc60fd Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53943 Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
125 lines
4.3 KiB
C++
125 lines
4.3 KiB
C++
/*
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* Copyright (c) 2018 Advanced Micro Devices, Inc.
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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 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
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* contributors may be used to endorse or promote products derived from this
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* software 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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#ifndef __GPU_COMPUTE_COMM_HH__
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#define __GPU_COMPUTE_COMM_HH__
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#include <array>
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#include <vector>
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#include "gpu-compute/exec_stage.hh"
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#include "gpu-compute/misc.hh"
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namespace gem5
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{
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struct ComputeUnitParams;
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class Wavefront;
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class PipeStageIFace
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{
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public:
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/**
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* Reset the pipe stage interface. This is called to remove
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* any stale state from the pipe stage that is leftover from
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* the prior cycle. This is needed when stages do not actually
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* consume the information passed via the stage interfaces.
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*/
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virtual void reset() = 0;
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};
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/**
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* Communication interface between ScoreboardCheck and Schedule stages.
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*/
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class ScoreboardCheckToSchedule : public PipeStageIFace
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{
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public:
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ScoreboardCheckToSchedule() = delete;
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ScoreboardCheckToSchedule(const ComputeUnitParams &p);
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void reset() override;
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/**
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* Mark the WF as ready for execution on a particular functional
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* unit.
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*/
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void markWFReady(Wavefront *wf, int func_unit_id);
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/**
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* Returns the number of ready lists (i.e., the number of functional
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* units). Each functional unit has its own list of ready WFs to
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* consider for arbitration.
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*/
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int numReadyLists() const;
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/**
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* TODO: These methods expose this class' implementation too much by
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* returning references to its internal data structures directly.
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* These are to support legacy functionality in the CU pipeline.
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* They should be removed eventually for an API that hides such
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* implementation details.
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*/
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std::vector<Wavefront*>& readyWFs(int func_unit_id);
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// TODO: Leftover from old CU code, needs to go away.
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void updateReadyList(int func_unit_id);
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private:
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std::vector<std::vector<Wavefront*>> _readyWFs;
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};
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/**
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* Communication interface between Schedule and Execute stages.
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*/
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class ScheduleToExecute : public PipeStageIFace
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{
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public:
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ScheduleToExecute() = delete;
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ScheduleToExecute(const ComputeUnitParams &p);
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void reset() override;
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GPUDynInstPtr& readyInst(int func_unit_id);
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/**
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* Once the scheduler has chosen a winning WF for execution, and
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* after the WF's oldest instruction's operands have been read,
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* this method is used to mark the instruction as ready to execute.
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* This puts it on the dispatch list to be consumed by the execute
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* stage.
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*/
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void dispatchTransition(const GPUDynInstPtr &gpu_dyn_inst,
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int func_unit_id, DISPATCH_STATUS disp_status);
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void dispatchTransition(int func_unit_id, DISPATCH_STATUS disp_status);
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DISPATCH_STATUS dispatchStatus(int func_unit_id) const;
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private:
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std::vector<GPUDynInstPtr> _readyInsts;
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std::vector<DISPATCH_STATUS> _dispatchStatus;
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};
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} // namespace gem5
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#endif // __GPU_COMPUTE_COMM_HH__
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