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authorTony Gutierrez <anthony.gutierrez@amd.com>2016-01-19 14:28:22 -0500
committerTony Gutierrez <anthony.gutierrez@amd.com>2016-01-19 14:28:22 -0500
commit1a7d3f9fcb76a68540dd948f91413533a383bfde (patch)
tree867510a147cd095f19499d26b7c02d27de4cae9d /src/gpu-compute/local_memory_pipeline.hh
parent28e353e0403ea379d244a418e8dc8ee0b48187cf (diff)
downloadgem5-1a7d3f9fcb76a68540dd948f91413533a383bfde.tar.xz
gpu-compute: AMD's baseline GPU model
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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();
+
+ template<typename c0, typename c1> void doSmReturn(GPUDynInstPtr m);
+
+ 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();
+
+ 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__