From 13c005a8af79a8481879ce099b45a1f98faae165 Mon Sep 17 00:00:00 2001 From: Nathan Binkert Date: Sat, 4 Jun 2005 20:50:10 -0400 Subject: shuffle files around for new directory structure --HG-- rename : cpu/base_cpu.cc => cpu/base.cc rename : cpu/base_cpu.hh => cpu/base.hh rename : cpu/beta_cpu/2bit_local_pred.cc => cpu/o3/2bit_local_pred.cc rename : cpu/beta_cpu/2bit_local_pred.hh => cpu/o3/2bit_local_pred.hh rename : cpu/beta_cpu/alpha_full_cpu.cc => cpu/o3/alpha_cpu.cc rename : cpu/beta_cpu/alpha_full_cpu.hh => cpu/o3/alpha_cpu.hh rename : cpu/beta_cpu/alpha_full_cpu_builder.cc => cpu/o3/alpha_cpu_builder.cc rename : cpu/beta_cpu/alpha_full_cpu_impl.hh => cpu/o3/alpha_cpu_impl.hh rename : cpu/beta_cpu/alpha_dyn_inst.cc => cpu/o3/alpha_dyn_inst.cc rename : cpu/beta_cpu/alpha_dyn_inst.hh => cpu/o3/alpha_dyn_inst.hh rename : cpu/beta_cpu/alpha_dyn_inst_impl.hh => cpu/o3/alpha_dyn_inst_impl.hh rename : cpu/beta_cpu/alpha_impl.hh => cpu/o3/alpha_impl.hh rename : cpu/beta_cpu/alpha_params.hh => cpu/o3/alpha_params.hh rename : cpu/beta_cpu/bpred_unit.cc => cpu/o3/bpred_unit.cc rename : cpu/beta_cpu/bpred_unit.hh => cpu/o3/bpred_unit.hh rename : cpu/beta_cpu/bpred_unit_impl.hh => cpu/o3/bpred_unit_impl.hh rename : cpu/beta_cpu/btb.cc => cpu/o3/btb.cc rename : cpu/beta_cpu/btb.hh => cpu/o3/btb.hh rename : cpu/beta_cpu/comm.hh => cpu/o3/comm.hh rename : cpu/beta_cpu/commit.cc => cpu/o3/commit.cc rename : cpu/beta_cpu/commit.hh => cpu/o3/commit.hh rename : cpu/beta_cpu/commit_impl.hh => cpu/o3/commit_impl.hh rename : cpu/beta_cpu/full_cpu.cc => cpu/o3/cpu.cc rename : cpu/beta_cpu/full_cpu.hh => cpu/o3/cpu.hh rename : cpu/beta_cpu/cpu_policy.hh => cpu/o3/cpu_policy.hh rename : cpu/beta_cpu/decode.cc => cpu/o3/decode.cc rename : cpu/beta_cpu/decode.hh => cpu/o3/decode.hh rename : cpu/beta_cpu/decode_impl.hh => cpu/o3/decode_impl.hh rename : cpu/beta_cpu/fetch.cc => cpu/o3/fetch.cc rename : cpu/beta_cpu/fetch.hh => cpu/o3/fetch.hh rename : cpu/beta_cpu/fetch_impl.hh => cpu/o3/fetch_impl.hh rename : cpu/beta_cpu/free_list.cc => cpu/o3/free_list.cc rename : cpu/beta_cpu/free_list.hh => cpu/o3/free_list.hh rename : cpu/beta_cpu/iew.cc => cpu/o3/iew.cc rename : cpu/beta_cpu/iew.hh => cpu/o3/iew.hh rename : cpu/beta_cpu/iew_impl.hh => cpu/o3/iew_impl.hh rename : cpu/beta_cpu/inst_queue.cc => cpu/o3/inst_queue.cc rename : cpu/beta_cpu/inst_queue.hh => cpu/o3/inst_queue.hh rename : cpu/beta_cpu/inst_queue_impl.hh => cpu/o3/inst_queue_impl.hh rename : cpu/beta_cpu/mem_dep_unit.cc => cpu/o3/mem_dep_unit.cc rename : cpu/beta_cpu/mem_dep_unit.hh => cpu/o3/mem_dep_unit.hh rename : cpu/beta_cpu/mem_dep_unit_impl.hh => cpu/o3/mem_dep_unit_impl.hh rename : cpu/beta_cpu/ras.cc => cpu/o3/ras.cc rename : cpu/beta_cpu/ras.hh => cpu/o3/ras.hh rename : cpu/beta_cpu/regfile.hh => cpu/o3/regfile.hh rename : cpu/beta_cpu/rename.cc => cpu/o3/rename.cc rename : cpu/beta_cpu/rename.hh => cpu/o3/rename.hh rename : cpu/beta_cpu/rename_impl.hh => cpu/o3/rename_impl.hh rename : cpu/beta_cpu/rename_map.cc => cpu/o3/rename_map.cc rename : cpu/beta_cpu/rename_map.hh => cpu/o3/rename_map.hh rename : cpu/beta_cpu/rob.cc => cpu/o3/rob.cc rename : cpu/beta_cpu/rob.hh => cpu/o3/rob.hh rename : cpu/beta_cpu/rob_impl.hh => cpu/o3/rob_impl.hh rename : cpu/beta_cpu/sat_counter.cc => cpu/o3/sat_counter.cc rename : cpu/beta_cpu/sat_counter.hh => cpu/o3/sat_counter.hh rename : cpu/beta_cpu/store_set.cc => cpu/o3/store_set.cc rename : cpu/beta_cpu/store_set.hh => cpu/o3/store_set.hh rename : cpu/beta_cpu/tournament_pred.cc => cpu/o3/tournament_pred.cc rename : cpu/beta_cpu/tournament_pred.hh => cpu/o3/tournament_pred.hh rename : cpu/ooo_cpu/ooo_cpu.cc => cpu/ozone/cpu.cc rename : cpu/ooo_cpu/ooo_cpu.hh => cpu/ozone/cpu.hh rename : cpu/ooo_cpu/ooo_impl.hh => cpu/ozone/cpu_impl.hh rename : cpu/ooo_cpu/ea_list.cc => cpu/ozone/ea_list.cc rename : cpu/ooo_cpu/ea_list.hh => cpu/ozone/ea_list.hh rename : cpu/simple_cpu/simple_cpu.cc => cpu/simple/cpu.cc rename : cpu/simple_cpu/simple_cpu.hh => cpu/simple/cpu.hh rename : cpu/full_cpu/smt.hh => cpu/smt.hh rename : cpu/full_cpu/op_class.hh => encumbered/cpu/full/op_class.hh extra : convert_revision : c4a891d8d6d3e0e9e5ea56be47d851da44d8c032 --- cpu/o3/iew.hh | 239 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 239 insertions(+) create mode 100644 cpu/o3/iew.hh (limited to 'cpu/o3/iew.hh') diff --git a/cpu/o3/iew.hh b/cpu/o3/iew.hh new file mode 100644 index 000000000..10979801c --- /dev/null +++ b/cpu/o3/iew.hh @@ -0,0 +1,239 @@ +/* + * Copyright (c) 2004-2005 The Regents of The University of Michigan + * 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. + */ + +//Todo: Update with statuses. +//Need to handle delaying writes to the writeback bus if it's full at the +//given time. + +#ifndef __CPU_BETA_CPU_SIMPLE_IEW_HH__ +#define __CPU_BETA_CPU_SIMPLE_IEW_HH__ + +#include + +#include "base/statistics.hh" +#include "base/timebuf.hh" +#include "cpu/o3/comm.hh" + +template +class SimpleIEW +{ + private: + //Typedefs from Impl + typedef typename Impl::ISA ISA; + typedef typename Impl::CPUPol CPUPol; + typedef typename Impl::DynInstPtr DynInstPtr; + typedef typename Impl::FullCPU FullCPU; + typedef typename Impl::Params Params; + + typedef typename CPUPol::IQ IQ; + typedef typename CPUPol::RenameMap RenameMap; + typedef typename CPUPol::LDSTQ LDSTQ; + + typedef typename CPUPol::TimeStruct TimeStruct; + typedef typename CPUPol::IEWStruct IEWStruct; + typedef typename CPUPol::RenameStruct RenameStruct; + typedef typename CPUPol::IssueStruct IssueStruct; + + friend class Impl::FullCPU; + public: + enum Status { + Running, + Blocked, + Idle, + Squashing, + Unblocking + }; + + private: + Status _status; + Status _issueStatus; + Status _exeStatus; + Status _wbStatus; + + public: + class WritebackEvent : public Event { + private: + DynInstPtr inst; + SimpleIEW *iewStage; + + public: + WritebackEvent(DynInstPtr &_inst, SimpleIEW *_iew); + + virtual void process(); + virtual const char *description(); + }; + + public: + SimpleIEW(Params ¶ms); + + void regStats(); + + void setCPU(FullCPU *cpu_ptr); + + void setTimeBuffer(TimeBuffer *tb_ptr); + + void setRenameQueue(TimeBuffer *rq_ptr); + + void setIEWQueue(TimeBuffer *iq_ptr); + + void setRenameMap(RenameMap *rm_ptr); + + void squash(); + + void squashDueToBranch(DynInstPtr &inst); + + void squashDueToMem(DynInstPtr &inst); + + void block(); + + inline void unblock(); + + void wakeDependents(DynInstPtr &inst); + + void instToCommit(DynInstPtr &inst); + + private: + void dispatchInsts(); + + void executeInsts(); + + public: + void tick(); + + void iew(); + + //Interfaces to objects inside and outside of IEW. + /** Time buffer interface. */ + TimeBuffer *timeBuffer; + + /** Wire to get commit's output from backwards time buffer. */ + typename TimeBuffer::wire fromCommit; + + /** Wire to write information heading to previous stages. */ + typename TimeBuffer::wire toRename; + + /** Rename instruction queue interface. */ + TimeBuffer *renameQueue; + + /** Wire to get rename's output from rename queue. */ + typename TimeBuffer::wire fromRename; + + /** Issue stage queue. */ + TimeBuffer issueToExecQueue; + + /** Wire to read information from the issue stage time queue. */ + typename TimeBuffer::wire fromIssue; + + /** + * IEW stage time buffer. Holds ROB indices of instructions that + * can be marked as completed. + */ + TimeBuffer *iewQueue; + + /** Wire to write infromation heading to commit. */ + typename TimeBuffer::wire toCommit; + + //Will need internal queue to hold onto instructions coming from + //the rename stage in case of a stall. + /** Skid buffer between rename and IEW. */ + std::queue skidBuffer; + + protected: + /** Instruction queue. */ + IQ instQueue; + + LDSTQ ldstQueue; + +#ifndef FULL_SYSTEM + public: + void lsqWriteback(); +#endif + + private: + /** Pointer to rename map. Might not want this stage to directly + * access this though... + */ + RenameMap *renameMap; + + /** CPU interface. */ + FullCPU *cpu; + + private: + /** Commit to IEW delay, in ticks. */ + unsigned commitToIEWDelay; + + /** Rename to IEW delay, in ticks. */ + unsigned renameToIEWDelay; + + /** + * Issue to execute delay, in ticks. What this actually represents is + * the amount of time it takes for an instruction to wake up, be + * scheduled, and sent to a FU for execution. + */ + unsigned issueToExecuteDelay; + + /** Width of issue's read path, in instructions. The read path is both + * the skid buffer and the rename instruction queue. + * Note to self: is this really different than issueWidth? + */ + unsigned issueReadWidth; + + /** Width of issue, in instructions. */ + unsigned issueWidth; + + /** Width of execute, in instructions. Might make more sense to break + * down into FP vs int. + */ + unsigned executeWidth; + + /** Number of cycles stage has been squashing. Used so that the stage + * knows when it can start unblocking, which is when the previous stage + * has received the stall signal and clears up its outputs. + */ + unsigned cyclesSquashing; + + Stats::Scalar<> iewIdleCycles; + Stats::Scalar<> iewSquashCycles; + Stats::Scalar<> iewBlockCycles; + Stats::Scalar<> iewUnblockCycles; +// Stats::Scalar<> iewWBInsts; + Stats::Scalar<> iewDispatchedInsts; + Stats::Scalar<> iewDispSquashedInsts; + Stats::Scalar<> iewDispLoadInsts; + Stats::Scalar<> iewDispStoreInsts; + Stats::Scalar<> iewDispNonSpecInsts; + Stats::Scalar<> iewIQFullEvents; + Stats::Scalar<> iewExecutedInsts; + Stats::Scalar<> iewExecLoadInsts; + Stats::Scalar<> iewExecStoreInsts; + Stats::Scalar<> iewExecSquashedInsts; + Stats::Scalar<> memOrderViolationEvents; + Stats::Scalar<> predictedTakenIncorrect; +}; + +#endif // __CPU_BETA_CPU_IEW_HH__ -- cgit v1.2.3