#include <energy_ctrl.hh>

Inheritance diagram for EnergyCtrl:

Public Types
enum	Registers { DVFS_HANDLER_STATUS = 0, DVFS_NUM_DOMAINS, DVFS_DOMAINID_AT_INDEX, DVFS_HANDLER_TRANS_LATENCY, DOMAIN_ID, PERF_LEVEL, PERF_LEVEL_ACK, NUM_OF_PERF_LEVELS, PERF_LEVEL_TO_READ, FREQ_AT_PERF_LEVEL, VOLT_AT_PERF_LEVEL, PIO_NUM_FIELDS }
	Discovery flows: More...

typedef EnergyCtrlParams	Params

Public Types inherited from BasicPioDevice
typedef BasicPioDeviceParams	Params

Public Types inherited from PioDevice
typedef PioDeviceParams	Params

Public Types inherited from MemObject
typedef MemObjectParams	Params

Public Types inherited from ClockedObject
typedef ClockedObjectParams	Params
	Parameters of ClockedObject. More...

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	EnergyCtrl (const Params *p)

Tick	read (PacketPtr pkt) override
	Read command sent to the device. More...

Tick	write (PacketPtr pkt) override
	Write command sent to the device. More...

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

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

void	startup () override
	startup() is the final initialization call before simulation. More...

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

Public Member Functions inherited from BasicPioDevice
	BasicPioDevice (const Params *p, Addr size)

const Params *	params () const

virtual AddrRangeList	getAddrRanges () const
	Determine the address ranges that this device responds to. More...

Public Member Functions inherited from PioDevice
	PioDevice (const Params *p)

virtual	~PioDevice ()

const Params *	params () const

virtual BaseSlavePort &	getSlavePort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a slave port with a given name and index. More...

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

	MemObject (const Params *params)

virtual BaseMasterPort &	getMasterPort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a master port with a given name and index. More...

Public Member Functions inherited from ClockedObject
	ClockedObject (const ClockedObjectParams *p)

const Params *	params () const

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

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

Enums::PwrState	pwrState () const

std::string	pwrStateName () const

std::vector< double >	pwrStateWeights () const
	Returns the percentage residency for each power state. More...

void	computeStats ()
	Record stats values like state residency by computing the time difference from previous update. More...

void	pwrState (Enums::PwrState)

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

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

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

Public Member Functions inherited from Clocked
void	updateClockPeriod () const
	Update the tick to the current tick. More...

Tick	clockEdge (Cycles cycles=Cycles(0)) const
	Determine the tick when a cycle begins, by default the current one, but the argument also enables the caller to determine a future cycle. More...

Cycles	curCycle () const
	Determine the current cycle, corresponding to a tick aligned to a clock edge. More...

Tick	nextCycle () const
	Based on the clock of the object, determine the start tick of the first cycle that is at least one cycle in the future. More...

uint64_t	frequency () const

Tick	clockPeriod () const

double	voltage () const

Cycles	ticksToCycles (Tick t) const

Tick	cyclesToTicks (Cycles c) const

Private Member Functions
void	updatePLAck ()
	Update the acknowledgment that is read back by the software to confirm newly requested performance level has been set. More...

Static Private Member Functions
static uint32_t	ticksTokHz (Tick period)

static uint32_t	toMicroVolt (double voltage)

Private Attributes
DVFSHandler *	dvfsHandler

uint32_t	domainID
	Cluster ID (DOMAIN_ID) R/W register, programmed to ID of the domain for which the set/get performance level command can be issued. More...

uint32_t	domainIDIndexToRead
	Index for getting the domain ID from the domain ID list available with the DVFS handler. More...

uint32_t	perfLevelAck
	Acknowledgment (PERF_LEVEL_ACK) RO register, software polls this register to read back the status of the last programmed change in the domain ID and/or the performance level. More...

uint32_t	perfLevelToRead

EventWrapper< EnergyCtrl,&EnergyCtrl::updatePLAck >	updateAckEvent

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 Member Functions inherited from Clocked
	Clocked (ClockDomain &clk_domain)
	Create a clocked object and set the clock domain based on the parameters. More...

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance. More...

void	resetClock () const
	Reset the object's clock using the current global tick value. More...

Protected Attributes inherited from BasicPioDevice
Addr	pioAddr
	Address that the device listens to. More...

Addr	pioSize
	Size that the device's address range. More...

Tick	pioDelay
	Delay that the device experinces on an access. More...

Protected Attributes inherited from PioDevice
System *	sys

PioPort	pioPort
	The pioPort that handles the requests for us and provides us requests that it sees. More...

Protected Attributes inherited from ClockedObject
Enums::PwrState	_currPwrState
	To keep track of the current power state. More...

Tick	prvEvalTick

Stats::Scalar	numPwrStateTransitions

Stats::Distribution	pwrStateClkGateDist

Stats::Vector	pwrStateResidencyTicks

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

Definition at line 65 of file energy_ctrl.hh.

Member Typedef Documentation

typedef EnergyCtrlParams EnergyCtrl::Params

Definition at line 119 of file energy_ctrl.hh.

Member Enumeration Documentation

enum EnergyCtrl::Registers

Discovery flows:

get basic DVFS handler information read(DVFS_HANDLER_STATUS) read(DVFS_HANDLER_TRANS_LATENCY)
get the number of domain IDs read(DVFS_NUM_DOMAINS) -> domains
query the driver to get the IDs for all i in domains write(DVFS_DOMAINID_AT_INDEX <- i) read(DOMAIN_ID) -> domainID_i
for each domainID i get voltage / frequency pairs write(DOMAIN_ID <- domainID_i) read(NUM_OF_PERF_LEVELS) -> levels_i
- for each l in levels_i write(PERF_LEVEL_TO_READ <- l) read(FREQ_AT_PERF_LEVEL) -> freq_l_i read(VOLT_AT_PERF_LEVEL) -> volt_l_i

Setting a specific performance level (V/F combination)

get performance for domain_ID i write(DOMAIN_ID <- i) read(PERF_LEVEL) -> perf_level_i
set performance for domain_ID i write(DOMAIN_ID <- i) write(PERF_LEVEL <- perf_level_i)
- wait for DVFS transition completion while (!read(PERF_LEVEL_ACK));

Enumerator
DVFS_HANDLER_STATUS
DVFS_NUM_DOMAINS
DVFS_DOMAINID_AT_INDEX
DVFS_HANDLER_TRANS_LATENCY
DOMAIN_ID
PERF_LEVEL
PERF_LEVEL_ACK
NUM_OF_PERF_LEVELS
PERF_LEVEL_TO_READ
FREQ_AT_PERF_LEVEL
VOLT_AT_PERF_LEVEL
PIO_NUM_FIELDS

Definition at line 104 of file energy_ctrl.hh.

Constructor & Destructor Documentation

EnergyCtrl::EnergyCtrl ( const Params * p )

Definition at line 50 of file energy_ctrl.cc.

References fatal_if().

Member Function Documentation

void EnergyCtrl::init ( )

overridevirtual

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

Initializations that are independent of unserialization but rely on a fully instantiated and connected SimObject graph should be done here.

Reimplemented from PioDevice.

Definition at line 261 of file energy_ctrl.cc.

References PioDevice::init().

Tick EnergyCtrl::read ( PacketPtr pkt )

overridevirtual

Read command sent to the device.

Parameters

pkt	Packet describing this request

Returns: number of ticks it took to complete

Implements PioDevice.

Definition at line 64 of file energy_ctrl.cc.

References DVFSHandler::clkPeriodAtPerfLevel(), DOMAIN_ID, DVFSHandler::domainID(), domainID, domainIDIndexToRead, DPRINTF, DVFS_DOMAINID_AT_INDEX, DVFS_HANDLER_STATUS, DVFS_HANDLER_TRANS_LATENCY, DVFS_NUM_DOMAINS, dvfsHandler, FREQ_AT_PERF_LEVEL, Packet::getAddr(), Packet::getSize(), DVFSHandler::isEnabled(), Packet::makeAtomicResponse(), SimClock::Int::ns, NUM_OF_PERF_LEVELS, DVFSHandler::numDomains(), DVFSHandler::numPerfLevels(), panic, PERF_LEVEL, PERF_LEVEL_ACK, DVFSHandler::perfLevel(), perfLevelAck, perfLevelToRead, BasicPioDevice::pioAddr, BasicPioDevice::pioDelay, BasicPioDevice::pioSize, X86ISA::reg, Packet::set(), ticksTokHz(), toMicroVolt(), DVFSHandler::transLatency(), VOLT_AT_PERF_LEVEL, Clocked::voltage(), DVFSHandler::voltageAtPerfLevel(), and warn_once.

void EnergyCtrl::serialize ( CheckpointOut & cp ) const

overridevirtual

Serialize an object.

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

Parameters

cp	Checkpoint state

Implements Serializable.

Definition at line 220 of file energy_ctrl.cc.

References domainID, domainIDIndexToRead, perfLevelAck, perfLevelToRead, Event::scheduled(), SERIALIZE_SCALAR, updateAckEvent, and Event::when().

void EnergyCtrl::startup ( )

overridevirtual

startup() is the final initialization call before simulation.

All state is initialized (including unserialized state, if any, such as the curTick() value), so this is the appropriate place to schedule initial event(s) for objects that need them.

Reimplemented from SimObject.

Definition at line 253 of file energy_ctrl.cc.

References dvfsHandler, DVFSHandler::isEnabled(), and warn.

static uint32_t EnergyCtrl::ticksTokHz ( Tick period )

inlinestaticprivate

Definition at line 169 of file energy_ctrl.hh.

References SimClock::Int::ms.

Referenced by read().

static uint32_t EnergyCtrl::toMicroVolt ( double voltage )

inlinestaticprivate

Definition at line 173 of file energy_ctrl.hh.

Referenced by read().

void EnergyCtrl::unserialize ( CheckpointIn & cp )

overridevirtual

Unserialize an object.

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

Parameters

cp	Checkpoint state

Implements Serializable.

Definition at line 232 of file energy_ctrl.cc.

References domainID, domainIDIndexToRead, perfLevelAck, perfLevelToRead, EventManager::schedule(), UNSERIALIZE_SCALAR, and updateAckEvent.

void EnergyCtrl::updatePLAck ( )

inlineprivate

Update the acknowledgment that is read back by the software to confirm newly requested performance level has been set.

Definition at line 181 of file energy_ctrl.hh.

References perfLevelAck.

Tick EnergyCtrl::write ( PacketPtr pkt )

overridevirtual

Write command sent to the device.

Parameters

pkt	Packet describing this request

Returns: number of ticks it took to complete

Implements PioDevice.

Definition at line 150 of file energy_ctrl.cc.

References curTick(), data, EventManager::deschedule(), DOMAIN_ID, domainID, domainIDIndexToRead, DPRINTF, DVFS_DOMAINID_AT_INDEX, dvfsHandler, Packet::get(), Packet::getAddr(), Packet::getSize(), DVFSHandler::isEnabled(), Packet::makeAtomicResponse(), panic, PERF_LEVEL, PERF_LEVEL_TO_READ, DVFSHandler::perfLevel(), perfLevelToRead, BasicPioDevice::pioAddr, BasicPioDevice::pioDelay, BasicPioDevice::pioSize, X86ISA::reg, EventManager::schedule(), Event::scheduled(), DVFSHandler::transLatency(), updateAckEvent, DVFSHandler::validDomainID(), and warn_once.

Member Data Documentation

uint32_t EnergyCtrl::domainID

private

Cluster ID (DOMAIN_ID) R/W register, programmed to ID of the domain for which the set/get performance level command can be issued.

Definition at line 148 of file energy_ctrl.hh.

Referenced by read(), serialize(), unserialize(), and write().

uint32_t EnergyCtrl::domainIDIndexToRead

private

Index for getting the domain ID from the domain ID list available with the DVFS handler.

Definition at line 154 of file energy_ctrl.hh.

Referenced by read(), serialize(), unserialize(), and write().

DVFSHandler* EnergyCtrl::dvfsHandler

private

Definition at line 142 of file energy_ctrl.hh.

Referenced by read(), startup(), and write().

uint32_t EnergyCtrl::perfLevelAck

private

Acknowledgment (PERF_LEVEL_ACK) RO register, software polls this register to read back the status of the last programmed change in the domain ID and/or the performance level.

Valid values are: '0' - Ack is not OK yet '1' - Ack is OK It is a read destructive register with a read of '1' resets the ack to '0'.

Definition at line 165 of file energy_ctrl.hh.

Referenced by read(), serialize(), unserialize(), and updatePLAck().

uint32_t EnergyCtrl::perfLevelToRead

private

Definition at line 167 of file energy_ctrl.hh.

Referenced by read(), serialize(), unserialize(), and write().