The constructed pipeline. More...

#include <pipeline.hh>

Inheritance diagram for gem5::minor::Pipeline:

Public Types
enum	StageId { CPUStageId = 0 , Fetch1StageId , Fetch2StageId , DecodeStageId , ExecuteStageId , Num_StageId }
	Enumerated ids of the 'stages' for the activity recorder. More...

Public Member Functions
	Pipeline (MinorCPU &cpu_, const BaseMinorCPUParams &params)

void	wakeupFetch (ThreadID tid)
	Wake up the Fetch unit.

bool	drain ()
	Try to drain the CPU.

void	drainResume ()

bool	isDrained ()
	Test to see if the CPU is drained.

void	evaluate () override
	A custom evaluate allows report in the right place (between stages and pipeline advance)

void	minorTrace () const

MinorCPU::MinorCPUPort &	getInstPort ()
	Functions below here are BaseCPU operations passed on to pipeline stages.

MinorCPU::MinorCPUPort &	getDataPort ()
	Return the DcachePort belonging to Execute for the CPU.

MinorActivityRecorder *	getActivityRecorder ()
	To give the activity recorder to the CPU.

Public Member Functions inherited from gem5::Ticked
	Ticked (ClockedObject &object_, statistics::Scalar *imported_num_cycles=NULL, Event::Priority priority=Event::CPU_Tick_Pri)

virtual	~Ticked ()

void	regStats ()
	Register {num,ticks}Cycles if necessary.

void	start ()
	Start ticking.

Cycles	cyclesSinceLastStopped () const
	How long have we been stopped for?

void	resetLastStopped ()
	Reset stopped time to current time.

void	stop ()
	Cancel the next tick event and issue no more.

void	serialize (CheckpointOut &cp) const override
	Checkpoint lastStopped.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

virtual void	countCycles (Cycles delta)
	Callback to handle cycle statistics and probes.

Public Member Functions inherited from gem5::Serializable
	Serializable ()

virtual	~Serializable ()

void	serializeSection (CheckpointOut &cp, const char *name) const
	Serialize an object into a new section.

void	serializeSection (CheckpointOut &cp, const std::string &name) const

void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.

void	unserializeSection (CheckpointIn &cp, const std::string &name)

Public Attributes
bool	needToSignalDrained
	True after drain is called but draining isn't complete.

Protected Attributes
MinorCPU &	cpu

bool	allow_idling
	Allow cycles to be skipped when the pipeline is idle.

Latch< ForwardLineData >	f1ToF2

Latch< BranchData >	f2ToF1

Latch< ForwardInstData >	f2ToD

Latch< ForwardInstData >	dToE

Latch< BranchData >	eToF1

Execute	execute

Decode	decode

Fetch2	fetch2

Fetch1	fetch1

MinorActivityRecorder	activityRecorder
	Activity recording for the pipeline.

Protected Attributes inherited from gem5::Ticked
ClockedObject &	object
	ClockedObject who is responsible for this Ticked's actions/stats.

EventFunctionWrapper	event
	The wrapper for processClockEvent.

bool	running
	Have I been started? and am not stopped.

Cycles	lastStopped
	Time of last stop event to calculate run time.

statistics::Scalar &	numCycles
	Total number of cycles either ticked or spend stopped.

statistics::Scalar	tickCycles
	Number of cycles ticked.

statistics::Formula	idleCycles
	Number of cycles stopped.

Additional Inherited Members
Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Protected Member Functions inherited from gem5::Ticked
void	processClockEvent ()
	Evaluate and reschedule.

Detailed Description

The constructed pipeline.

Kept out of MinorCPU to keep the interface between the CPU and its grubby implementation details clean.

Definition at line 72 of file pipeline.hh.

Member Enumeration Documentation

◆ StageId

enum gem5::minor::Pipeline::StageId

Enumerated ids of the 'stages' for the activity recorder.

Enumerator
CPUStageId
Fetch1StageId
Fetch2StageId
DecodeStageId
ExecuteStageId
Num_StageId

Definition at line 98 of file pipeline.hh.

Constructor & Destructor Documentation

◆ Pipeline()

gem5::minor::Pipeline::Pipeline	(	MinorCPU &	cpu_,
		const BaseMinorCPUParams &	params )

Definition at line 57 of file pipeline.cc.

References cpu, fatal, and gem5::Named::name().

Member Function Documentation

◆ drain()

bool gem5::minor::Pipeline::drain ( )

Try to drain the CPU.

Definition at line 201 of file pipeline.cc.

References DPRINTF, gem5::minor::Execute::drain(), execute, isDrained(), and needToSignalDrained.

◆ drainResume()

void gem5::minor::Pipeline::drainResume ( )

Definition at line 217 of file pipeline.cc.

References cpu, DPRINTF, gem5::minor::Execute::drainResume(), execute, fetch1, gem5::BaseCPU::numThreads, and gem5::minor::Fetch1::wakeupFetch().

◆ evaluate()

void gem5::minor::Pipeline::evaluate ( )

overridevirtual

A custom evaluate allows report in the right place (between stages and pipeline advance)

We tick the CPU to update the BaseCPU cycle counters

Implements gem5::Ticked.

Definition at line 125 of file pipeline.cc.

References gem5::ActivityRecorder::active(), activityRecorder, allow_idling, cpu, CPUStageId, gem5::ActivityRecorder::deactivateStage(), decode, DecodeStageId, DPRINTF, dToE, eToF1, gem5::minor::Decode::evaluate(), gem5::minor::Execute::evaluate(), gem5::minor::Fetch1::evaluate(), gem5::minor::Fetch2::evaluate(), gem5::minor::MinorActivityRecorder::evaluate(), execute, ExecuteStageId, f1ToF2, f2ToD, f2ToF1, fetch1, Fetch1StageId, fetch2, Fetch2StageId, isDrained(), minorTrace(), needToSignalDrained, gem5::MinorCPU::signalDrainDone(), gem5::Ticked::stop(), and gem5::MinorCPU::tick().

◆ getActivityRecorder()

MinorActivityRecorder * gem5::minor::Pipeline::getActivityRecorder ( )

inline

To give the activity recorder to the CPU.

Definition at line 141 of file pipeline.hh.

References activityRecorder.

◆ getDataPort()

MinorCPU::MinorCPUPort & gem5::minor::Pipeline::getDataPort ( )

Return the DcachePort belonging to Execute for the CPU.

Definition at line 189 of file pipeline.cc.

References execute, and gem5::minor::Execute::getDcachePort().

◆ getInstPort()

MinorCPU::MinorCPUPort & gem5::minor::Pipeline::getInstPort ( )

Functions below here are BaseCPU operations passed on to pipeline stages.

Return the IcachePort belonging to Fetch1 for the CPU

Definition at line 183 of file pipeline.cc.

References fetch1, and gem5::minor::Fetch1::getIcachePort().

◆ isDrained()

bool gem5::minor::Pipeline::isDrained ( )

Test to see if the CPU is drained.

Definition at line 229 of file pipeline.cc.

References decode, DPRINTF, dToE, execute, f1ToF2, f2ToD, f2ToF1, fetch1, fetch2, gem5::minor::Decode::isDrained(), gem5::minor::Execute::isDrained(), gem5::minor::Fetch1::isDrained(), and gem5::minor::Fetch2::isDrained().

Referenced by drain(), and evaluate().

◆ minorTrace()

void gem5::minor::Pipeline::minorTrace ( ) const

Definition at line 110 of file pipeline.cc.

References activityRecorder, decode, dToE, eToF1, execute, f1ToF2, f2ToD, f2ToF1, fetch1, fetch2, gem5::minor::Decode::minorTrace(), gem5::minor::Execute::minorTrace(), gem5::minor::Fetch1::minorTrace(), gem5::minor::Fetch2::minorTrace(), and gem5::minor::MinorActivityRecorder::minorTrace().

Referenced by evaluate().

◆ wakeupFetch()

void gem5::minor::Pipeline::wakeupFetch ( ThreadID tid )

Wake up the Fetch unit.

This is needed on thread activation esp. after quiesce wakeup

Definition at line 195 of file pipeline.cc.

References fetch1, and gem5::minor::Fetch1::wakeupFetch().

Member Data Documentation

◆ activityRecorder

MinorActivityRecorder gem5::minor::Pipeline::activityRecorder

protected

Activity recording for the pipeline.

This is access through the CPU by the pipeline stages but belongs to the Pipeline as it is the cleanest place to initialise it

Definition at line 94 of file pipeline.hh.

Referenced by evaluate(), getActivityRecorder(), and minorTrace().

◆ allow_idling

bool gem5::minor::Pipeline::allow_idling

protected

Allow cycles to be skipped when the pipeline is idle.

Definition at line 78 of file pipeline.hh.

Referenced by evaluate().

◆ cpu

MinorCPU& gem5::minor::Pipeline::cpu

protected

Definition at line 75 of file pipeline.hh.

Referenced by drainResume(), evaluate(), and Pipeline().

◆ decode

Decode gem5::minor::Pipeline::decode

protected

Definition at line 87 of file pipeline.hh.

Referenced by evaluate(), isDrained(), and minorTrace().

◆ dToE

Latch<ForwardInstData> gem5::minor::Pipeline::dToE

protected

Definition at line 83 of file pipeline.hh.

Referenced by evaluate(), isDrained(), and minorTrace().

◆ eToF1

Latch<BranchData> gem5::minor::Pipeline::eToF1

protected

Definition at line 84 of file pipeline.hh.

Referenced by evaluate(), and minorTrace().

◆ execute

Execute gem5::minor::Pipeline::execute

protected

Definition at line 86 of file pipeline.hh.

Referenced by drain(), drainResume(), evaluate(), getDataPort(), isDrained(), and minorTrace().

◆ f1ToF2

Latch<ForwardLineData> gem5::minor::Pipeline::f1ToF2

protected

Definition at line 80 of file pipeline.hh.

Referenced by evaluate(), isDrained(), and minorTrace().

◆ f2ToD

Latch<ForwardInstData> gem5::minor::Pipeline::f2ToD

protected

Definition at line 82 of file pipeline.hh.

Referenced by evaluate(), isDrained(), and minorTrace().

◆ f2ToF1

Latch<BranchData> gem5::minor::Pipeline::f2ToF1

protected

Definition at line 81 of file pipeline.hh.

Referenced by evaluate(), isDrained(), and minorTrace().

◆ fetch1

Fetch1 gem5::minor::Pipeline::fetch1

protected

Definition at line 89 of file pipeline.hh.

Referenced by drainResume(), evaluate(), getInstPort(), isDrained(), minorTrace(), and wakeupFetch().

◆ fetch2

Fetch2 gem5::minor::Pipeline::fetch2

protected

Definition at line 88 of file pipeline.hh.

Referenced by evaluate(), isDrained(), and minorTrace().

◆ needToSignalDrained

bool gem5::minor::Pipeline::needToSignalDrained

True after drain is called but draining isn't complete.

Definition at line 108 of file pipeline.hh.

Referenced by drain(), and evaluate().

The documentation for this class was generated from the following files:

cpu/minor/pipeline.hh
cpu/minor/pipeline.cc

Public Types

Public Member Functions

Public Attributes

Protected Attributes

Additional Inherited Members

Detailed Description

Member Enumeration Documentation

◆ StageId

Constructor & Destructor Documentation

◆ Pipeline()

Member Function Documentation

◆ drain()

◆ drainResume()

◆ evaluate()

◆ getActivityRecorder()

◆ getDataPort()

◆ getInstPort()

◆ isDrained()

◆ minorTrace()

◆ wakeupFetch()

Member Data Documentation

◆ activityRecorder

◆ allow_idling

◆ cpu

◆ decode

◆ dToE

◆ eToF1

◆ execute

◆ f1ToF2

◆ f2ToD

◆ f2ToF1

◆ fetch1

◆ fetch2

◆ needToSignalDrained