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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.
*
* Author: Sooraj Puthoor
*/
#ifndef __LOCAL_MEMORY_PIPELINE_HH__
#define __LOCAL_MEMORY_PIPELINE_HH__
#include <queue>
#include <string>
#include "gpu-compute/misc.hh"
#include "params/ComputeUnit.hh"
#include "sim/stats.hh"
/*
* @file local_memory_pipeline.hh
*
* The local memory pipeline issues newly created local memory packets
* from pipeline to the LDS. This stage also retires previously issued
* loads and stores that have returned from the LDS.
*/
class ComputeUnit;
class Wavefront;
class LocalMemPipeline
{
public:
LocalMemPipeline(const ComputeUnitParams *params);
void init(ComputeUnit *cu);
void exec();
std::queue<GPUDynInstPtr> &getLMReqFIFO() { return lmIssuedRequests; }
std::queue<GPUDynInstPtr> &getLMRespFIFO() { return lmReturnedRequests; }
bool
isLMRespFIFOWrRdy() const
{
return lmReturnedRequests.size() < lmQueueSize;
}
bool
isLMReqFIFOWrRdy(uint32_t pendReqs=0) const
{
return (lmIssuedRequests.size() + pendReqs) < lmQueueSize;
}
const std::string& name() const { return _name; }
void regStats();
void
incLoadVRFBankConflictCycles(int num_cycles)
{
loadVrfBankConflictCycles += num_cycles;
}
private:
ComputeUnit *computeUnit;
std::string _name;
int lmQueueSize;
Stats::Scalar loadVrfBankConflictCycles;
// Local Memory Request Fifo: all shared memory requests
// are issued to this FIFO from the memory pipelines
std::queue<GPUDynInstPtr> lmIssuedRequests;
// Local Memory Response Fifo: all responses of shared memory
// requests are sent to this FIFO from LDS
std::queue<GPUDynInstPtr> lmReturnedRequests;
};
#endif // __LOCAL_MEMORY_PIPELINE_HH__
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