From 973d8b8b13b8e4ea178cafa95aaf6538699b8b15 Mon Sep 17 00:00:00 2001 From: Korey Sewell Date: Tue, 10 Feb 2009 15:49:29 -0800 Subject: InOrder: Import new inorder CPU model from MIPS. This model currently only works in MIPS_SE mode, so it will take some effort to clean it up and make it generally useful. Hopefully people are willing to help make that happen! --- src/cpu/inorder/pipeline_traits.hh | 177 +++++++++++++++++++++++++++++++++++++ 1 file changed, 177 insertions(+) create mode 100644 src/cpu/inorder/pipeline_traits.hh (limited to 'src/cpu/inorder/pipeline_traits.hh') diff --git a/src/cpu/inorder/pipeline_traits.hh b/src/cpu/inorder/pipeline_traits.hh new file mode 100644 index 000000000..c5e4bb228 --- /dev/null +++ b/src/cpu/inorder/pipeline_traits.hh @@ -0,0 +1,177 @@ +/* + * Copyright (c) 2007 MIPS Technologies, Inc. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * 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; + * neither the name of the copyright holders 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 + * OWNER 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: Korey Sewell + * + */ + +#ifndef __CPU_INORDER_PIPELINE_IMPL_HH__ +#define __CPU_INORDER_PIPELINE_IMPL_HH__ + +#include +#include +#include + +#include "arch/isa_traits.hh" +#include "cpu/base.hh" +//#include "cpu/inorder/params.hh" + +#include "params/InOrderCPU.hh" + +class InOrderDynInst; + +/* This Namespace contains constants, typedefs, functions and + * objects specific to the Pipeline Implementation. + */ +namespace ThePipeline { + // Pipeline Constants + const unsigned NumStages = 5; + const unsigned MaxThreads = 8; + const unsigned StageWidth = 1; + const unsigned BackEndStartStage = 2; + + // Enumerated List of Resources The Pipeline Uses + enum ResourceList { + FetchSeq = 0, + ITLB, + ICache, + Decode, + BPred, + FetchBuff, + RegManager, + AGEN, + ExecUnit, + MDU, + DTLB, + DCache, + Grad, + FetchBuff2 + }; + + // Expand this as necessary for your inter stage buffer sizes + static const unsigned interStageBuffSize[] = { + StageWidth, /* Stage 0 - 1 */ + StageWidth, /* Stage 1 - 2 */ + StageWidth, /* Stage 2 - 3 */ + StageWidth, /* Stage 3 - 4 */ + StageWidth, /* Stage 4 - 5 */ + StageWidth, /* Stage 5 - 6 */ + StageWidth, /* Stage 6 - 7 */ + StageWidth, /* Stage 7 - 8 */ + StageWidth /* Stage 8 - 9 */ + }; + + typedef InOrderCPUParams Params; + typedef RefCountingPtr DynInstPtr; + + ////////////////////////// + // RESOURCE SCHEDULING + ////////////////////////// + struct ScheduleEntry { + ScheduleEntry(int stage_num, int _priority, int res_num, int _cmd = 0, + int _idx = 0) : + stageNum(stage_num), resNum(res_num), cmd(_cmd), + idx(_idx), priority(_priority) + { } + virtual ~ScheduleEntry(){} + + // Stage number to perform this service. + int stageNum; + + // Resource ID to access + int resNum; + + // See specific resource for meaning + unsigned cmd; + + // See specific resource for meaning + unsigned idx; + + // Some Resources May Need Priority? + int priority; + }; + + struct entryCompare { + bool operator()(const ScheduleEntry* lhs, const ScheduleEntry* rhs) const + { + // Prioritize first by stage number that the resource is needed + if (lhs->stageNum > rhs->stageNum) { + return true; + } else if (lhs->stageNum == rhs->stageNum) { + /*if (lhs->resNum > rhs->resNum) { + return true; + } else { + return false; + }*/ + + if (lhs->priority > rhs->priority) { + return true; + } else { + return false; + } + } else { + return false; + } + } + }; + + + typedef std::priority_queue, + entryCompare> ResSchedule; + + void createFrontEndSchedule(DynInstPtr &inst); + bool createBackEndSchedule(DynInstPtr &inst); + int getNextPriority(DynInstPtr &inst, int stage_num); + + class InstStage { + private: + int nextTaskPriority; + int stageNum; + ResSchedule *instSched; + + public: + InstStage(DynInstPtr inst, int stage_num); + + void needs(int unit, int request) { + instSched->push( new ScheduleEntry( + stageNum, nextTaskPriority++, unit, request + )); + } + + void needs(int unit, int request, int param) { + instSched->push( new ScheduleEntry( + stageNum, nextTaskPriority++, unit, request, param + )); + } + + }; +}; + + + + +#endif -- cgit v1.2.3