fetch_unit.hh revision 11308
1/* 2 * Copyright (c) 2014-2015 Advanced Micro Devices, Inc. 3 * All rights reserved. 4 * 5 * For use for simulation and test purposes only 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright notice, 11 * this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the copyright holder nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Author: Brad Beckmann, Sooraj Puthoor 34 */ 35 36#ifndef __FETCH_UNIT_HH__ 37#define __FETCH_UNIT_HH__ 38 39#include <string> 40#include <utility> 41#include <vector> 42 43#include "arch/gpu_decoder.hh" 44#include "base/statistics.hh" 45#include "config/the_gpu_isa.hh" 46#include "gpu-compute/scheduler.hh" 47#include "mem/packet.hh" 48 49class ComputeUnit; 50class Wavefront; 51 52class FetchUnit 53{ 54 public: 55 FetchUnit(const ComputeUnitParams* params); 56 ~FetchUnit(); 57 void init(ComputeUnit *cu); 58 void exec(); 59 void bindWaveList(std::vector<Wavefront*> *list); 60 void initiateFetch(Wavefront *wavefront); 61 void fetch(PacketPtr pkt, Wavefront *wavefront); 62 void processFetchReturn(PacketPtr pkt); 63 static uint32_t globalFetchUnitID; 64 65 private: 66 bool timingSim; 67 ComputeUnit *computeUnit; 68 TheGpuISA::Decoder decoder; 69 70 // Fetch scheduler; Selects one wave from 71 // the fetch queue for instruction fetching. 72 // The selection is made according to 73 // a scheduling policy 74 Scheduler fetchScheduler; 75 76 // Stores the list of waves that are 77 // ready to be fetched this cycle 78 std::vector<Wavefront*> fetchQueue; 79 80 // Stores the fetch status of all waves dispatched to this SIMD. 81 // TRUE implies the wave is ready to fetch and is already 82 // moved to fetchQueue 83 std::vector<std::pair<Wavefront*, bool>> fetchStatusQueue; 84 85 // Pointer to list of waves dispatched on to this SIMD unit 86 std::vector<Wavefront*> *waveList; 87}; 88 89#endif // __FETCH_UNIT_HH__ 90