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/*
* Copyright (c) 2014-2015 Advanced Micro Devices, Inc.
* All rights reserved.
*
* For use for simulation and test purposes only
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the copyright holder 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 HOLDER 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.
*
* Authors: Sooraj Puthoor,
* Mark Wyse
*/
#ifndef __SCHEDULE_STAGE_HH__
#define __SCHEDULE_STAGE_HH__
#include <utility>
#include <vector>
#include "gpu-compute/exec_stage.hh"
#include "gpu-compute/scheduler.hh"
#include "gpu-compute/scoreboard_check_stage.hh"
// Schedule or execution arbitration stage.
// From the pool of ready waves in the ready list,
// one wave is selected for each execution resource.
// The selection is made based on a scheduling policy
class ComputeUnit;
class Wavefront;
struct ComputeUnitParams;
class ScheduleStage
{
public:
ScheduleStage(const ComputeUnitParams *params);
~ScheduleStage();
void init(ComputeUnit *cu);
void exec();
void arbitrate();
// Stats related variables and methods
std::string name() { return _name; }
void regStats();
private:
ComputeUnit *computeUnit;
uint32_t numSIMDs;
uint32_t numMemUnits;
// Each execution resource will have its own
// scheduler and a dispatch list
std::vector<Scheduler> scheduler;
// Stores the status of waves. A READY implies the
// wave is ready to be scheduled this cycle and
// is already present in the readyList
std::vector<std::vector<std::pair<Wavefront*, WAVE_STATUS>>*>
waveStatusList;
// List of waves which will be dispatched to
// each execution resource. A FILLED implies
// dispatch list is non-empty and
// execution unit has something to execute
// this cycle. Currently, the dispatch list of
// an execution resource can hold only one wave because
// an execution resource can execute only one wave in a cycle.
std::vector<std::pair<Wavefront*, DISPATCH_STATUS>> *dispatchList;
std::string _name;
};
#endif // __SCHEDULE_STAGE_HH__
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