A VoltageDomain is used to group clock domains that operate under the same voltage. More...

#include <voltage_domain.hh>

Inheritance diagram for VoltageDomain:

Public Types
typedef VoltageDomainParams	Params

typedef SrcClockDomain::PerfLevel	PerfLevel

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	VoltageDomain (const Params *p)

double	voltage () const
	Get the current voltage. More...

double	voltage (PerfLevel perf_level) const
	Get the voltage at specified performance level. More...

uint32_t	numVoltages () const

void	perfLevel (PerfLevel perf_level)
	Set the voltage point of the domain. More...

PerfLevel	perfLevel () const
	Get the voltage point of the domain. More...

void	registerSrcClockDom (SrcClockDomain *src_clock_dom)
	Register a SrcClockDomain with this voltage domain. More...

void	startup () override
	Startup has all SrcClockDomains registered with this voltage domain, so try to make sure that all perf level requests from them are met. More...

bool	sanitiseVoltages ()
	Recomputes the highest (fastest, i.e., numerically lowest) requested performance level of all associated clock domains, and updates the performance level of this voltage domain to match. More...

void	regStats () override
	Register statistics for this object. More...

void	serialize (CheckpointOut &cp) const override
	Serialize an object. More...

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

Public Member Functions inherited from SimObject
const Params *	params () const

	SimObject (const Params *_params)

virtual	~SimObject ()

virtual const std::string	name () const

virtual void	init ()
	init() is called after all C++ SimObjects have been created and all ports are connected. More...

virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint. More...

virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint. More...

virtual void	resetStats ()
	Reset statistics associated with this object. More...

virtual void	regProbePoints ()
	Register probe points for this object. More...

virtual void	regProbeListeners ()
	Register probe listeners for this object. More...

ProbeManager *	getProbeManager ()
	Get the probe manager for this object. More...

DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining. More...

virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes. More...

virtual void	memInvalidate ()
	Invalidate the contents of memory buffers. More...

Public Member Functions inherited from EventManager
	EventManager (EventManager &em)

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

EventQueue *	eventQueue () const

void	schedule (Event &event, Tick when)

void	deschedule (Event &event)

void	reschedule (Event &event, Tick when, bool always=false)

void	schedule (Event *event, Tick when)

void	deschedule (Event *event)

void	reschedule (Event *event, Tick when, bool always=false)

void	wakeupEventQueue (Tick when=(Tick)-1)

void	setCurTick (Tick newVal)

Public Member Functions inherited from Serializable
	Serializable ()

virtual	~Serializable ()

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

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

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

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

Public Member Functions inherited from Drainable
DrainState	drainState () const
	Return the current drain state of an object. More...

virtual void	notifyFork ()
	Notify a child process of a fork. More...

Private Types
typedef std::vector< double >	Voltages

typedef std::vector < SrcClockDomain * >	SrcClockChildren
	List of associated SrcClockDomains that are connected to this voltage domain. More...

Private Attributes
const Voltages	voltageOpPoints
	List of possible minimum voltage at each of the frequency operational points, should be in descending order and same size as freqOpPoints. More...

PerfLevel	_perfLevel

Stats::Value	currentVoltage
	Stat for reporting voltage of the domain. More...

SrcClockChildren	srcClockChildren

Additional Inherited Members
Static Public Member Functions inherited from SimObject
static void	serializeAll (CheckpointOut &cp)
	Serialize all SimObjects in the system. More...

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it. More...

Static Public Member Functions inherited from Serializable
static const std::string &	currentSection ()
	Get the fully-qualified name of the active section. More...

static void	serializeAll (const std::string &cpt_dir)

static void	unserializeGlobals (CheckpointIn &cp)

Static Public Attributes inherited from Serializable
static int	ckptCount = 0

static int	ckptMaxCount = 0

static int	ckptPrevCount = -1

Protected Member Functions inherited from Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain. More...

void	signalDrainDone () const
	Signal that an object is drained. More...

Protected Attributes inherited from SimObject
const SimObjectParams *	_params
	Cached copy of the object parameters. More...

Protected Attributes inherited from EventManager
EventQueue *	eventq
	A pointer to this object's event queue. More...

Detailed Description

A VoltageDomain is used to group clock domains that operate under the same voltage.

The class provides methods for setting and getting the voltage.

Definition at line 56 of file voltage_domain.hh.

Member Typedef Documentation

typedef VoltageDomainParams VoltageDomain::Params

Definition at line 60 of file voltage_domain.hh.

typedef SrcClockDomain::PerfLevel VoltageDomain::PerfLevel

Definition at line 63 of file voltage_domain.hh.

typedef std::vector<SrcClockDomain *> VoltageDomain::SrcClockChildren

private

List of associated SrcClockDomains that are connected to this voltage domain.

Definition at line 155 of file voltage_domain.hh.

typedef std::vector<double> VoltageDomain::Voltages

private

Definition at line 135 of file voltage_domain.hh.

Constructor & Destructor Documentation

VoltageDomain::VoltageDomain ( const Params * p )

Definition at line 51 of file voltage_domain.cc.

References fatal_if(), SimObject::name(), and voltageOpPoints.

Member Function Documentation

uint32_t VoltageDomain::numVoltages ( ) const

inline

Definition at line 87 of file voltage_domain.hh.

References voltageOpPoints.

Referenced by sanitiseVoltages(), SrcClockDomain::SrcClockDomain(), voltage(), and DVFSHandler::voltageAtPerfLevel().

void VoltageDomain::perfLevel ( PerfLevel perf_level )

Set the voltage point of the domain.

Parameters

Voltage value to be set

Definition at line 65 of file voltage_domain.cc.

References _perfLevel, chatty_assert, DPRINTF, SimObject::name(), voltage(), and voltageOpPoints.

PerfLevel VoltageDomain::perfLevel ( ) const

inline

Get the voltage point of the domain.

Parameters

Voltage value to be set

Definition at line 99 of file voltage_domain.hh.

References _perfLevel.

Referenced by sanitiseVoltages(), and unserialize().

void VoltageDomain::registerSrcClockDom ( SrcClockDomain * src_clock_dom )

inline

Register a SrcClockDomain with this voltage domain.

Parameters

src_clock_domain The SrcClockDomain to register.

Definition at line 105 of file voltage_domain.hh.

References srcClockChildren, and ClockDomain::voltageDomain().

Referenced by SrcClockDomain::SrcClockDomain().

void VoltageDomain::regStats ( )

overridevirtual

Register statistics for this object.

Reimplemented from SimObject.

Definition at line 131 of file voltage_domain.cc.

References currentVoltage, Stats::DataWrap< Derived, InfoProxyType >::desc(), Stats::ValueBase< Derived >::method(), SimObject::name(), Stats::DataWrap< Derived, InfoProxyType >::name(), SimObject::params(), SimObject::regStats(), and voltage().

bool VoltageDomain::sanitiseVoltages ( )

Recomputes the highest (fastest, i.e., numerically lowest) requested performance level of all associated clock domains, and updates the performance level of this voltage domain to match.

This means that for two connected clock domains, one fast and one slow, the voltage domain will provide the voltage associated with the fast DVFS operation point. Must be called whenever a clock domain decides to swtich its performance level.

Returns: True, if the voltage was actually changed.

Definition at line 83 of file voltage_domain.cc.

References chatty_assert, ArmISA::d, SrcClockDomain::domainID(), DPRINTF, SimObject::name(), numVoltages(), perfLevel(), SrcClockDomain::perfLevel(), srcClockChildren, and ClockDomain::voltageDomain().

Referenced by SrcClockDomain::signalPerfLevelUpdate(), and startup().

void VoltageDomain::serialize ( CheckpointOut & cp ) const

overridevirtual

Serialize an object.

Output an object's state into the current checkpoint section.

Parameters

cp	Checkpoint state

Reimplemented from SimObject.

Definition at line 149 of file voltage_domain.cc.

References _perfLevel, and SERIALIZE_SCALAR.

void VoltageDomain::startup ( )

overridevirtual

Startup has all SrcClockDomains registered with this voltage domain, so try to make sure that all perf level requests from them are met.

Reimplemented from SimObject.

Definition at line 122 of file voltage_domain.cc.

References SimObject::name(), sanitiseVoltages(), and warn.

void VoltageDomain::unserialize ( CheckpointIn & cp )

overridevirtual

Unserialize an object.

Read an object's state from the current checkpoint section.

Parameters

cp	Checkpoint state

Reimplemented from SimObject.

Definition at line 155 of file voltage_domain.cc.

References _perfLevel, perfLevel(), and UNSERIALIZE_SCALAR.

double VoltageDomain::voltage ( ) const

inline

Get the current voltage.

Returns: Voltage of the domain

Definition at line 70 of file voltage_domain.hh.

References _perfLevel, and voltageOpPoints.

Referenced by perfLevel(), regStats(), ClockDomain::voltage(), and DVFSHandler::voltageAtPerfLevel().

double VoltageDomain::voltage ( PerfLevel perf_level ) const

inline

Get the voltage at specified performance level.

Parameters

perf_level Performance level for which the voltage is requested

Returns: Voltage of the domain at specified performance level

Definition at line 78 of file voltage_domain.hh.

References chatty_assert, SimObject::name(), numVoltages(), and voltageOpPoints.

Member Data Documentation

PerfLevel VoltageDomain::_perfLevel

private

Definition at line 144 of file voltage_domain.hh.

Referenced by perfLevel(), serialize(), unserialize(), and voltage().

Stats::Value VoltageDomain::currentVoltage

private

Stat for reporting voltage of the domain.

Definition at line 149 of file voltage_domain.hh.

Referenced by regStats().

SrcClockChildren VoltageDomain::srcClockChildren

private

Definition at line 156 of file voltage_domain.hh.

Referenced by registerSrcClockDom(), and sanitiseVoltages().

const Voltages VoltageDomain::voltageOpPoints

private

List of possible minimum voltage at each of the frequency operational points, should be in descending order and same size as freqOpPoints.

An empty list corresponds to default voltage specified for the voltage domain its clock domain belongs. The same voltage is applied for each freqOpPoints, overall implying NO DVS

Definition at line 143 of file voltage_domain.hh.

Referenced by numVoltages(), perfLevel(), voltage(), and VoltageDomain().

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

sim/voltage_domain.hh
sim/voltage_domain.cc

Public Types

Public Member Functions

Private Types

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation