Interface to NVM devices with media specific parameters, statistics, and functions. More...

#include <mem_interface.hh>

Inheritance diagram for NVMInterface:

Classes
struct	NVMStats

class	Rank
	NVM rank class simply includes a vector of banks. More...

Public Member Functions
void	init () override
	Initialize the NVM interface and verify parameters. More...

void	setupRank (const uint8_t rank, const bool is_read) override
	Setup the rank based on packet received. More...

bool	allRanksDrained () const override
	Check drain state of NVM interface. More...

Tick	commandOffset () const override

bool	burstReady (MemPacket *pkt) const override
	Check if a burst operation can be issued to the NVM. More...

bool	isBusy (bool read_queue_empty, bool all_writes_nvm)
	This function checks if ranks are busy. More...

std::pair< MemPacketQueue::iterator, Tick >	chooseNextFRFCFS (MemPacketQueue &queue, Tick min_col_at) const override
	For FR-FCFS policy, find first NVM command that can issue default to first command to prepped region. More...

void	addRankToRankDelay (Tick cmd_at) override
	Add rank to rank delay to bus timing to all NVM banks in alli ranks when access to an alternate interface is issued. More...

void	chooseRead (MemPacketQueue &queue)
	Select read command to issue asynchronously. More...

Tick	accessLatency () const override

bool	writeRespQueueFull () const
	Check if the write response queue has reached defined threshold. More...

bool	readsWaitingToIssue () const

std::pair< Tick, Tick >	doBurstAccess (MemPacket *pkt, Tick next_burst_at)
	Actually do the burst and update stats. More...

	NVMInterface (const NVMInterfaceParams *_p)

Public Member Functions inherited from MemInterface
void	setCtrl (MemCtrl *_ctrl, unsigned int command_window)
	Set a pointer to the controller and initialize interface based on controller parameters. More...

Addr	getCtrlAddr (Addr addr)
	Get an address in a dense range which starts from 0. More...

uint32_t	bytesPerBurst () const

Tick	rankDelay () const
	Determine the required delay for an access to a different rank. More...

Tick	minReadToWriteDataGap () const

Tick	minWriteToReadDataGap () const

MemPacket *	decodePacket (const PacketPtr pkt, Addr pkt_addr, unsigned int size, bool is_read, bool is_dram)
	Address decoder to figure out physical mapping onto ranks, banks, and rows. More...

	MemInterface (const Params *_p)

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

virtual	~AbstractMemory ()

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

bool	isNull () const
	See if this is a null memory that should never store data and always return zero. More...

void	setBackingStore (uint8_t *pmem_addr)
	Set the host memory backing store to be used by this memory controller. More...

const std::list< LockedAddr > &	getLockedAddrList () const
	Get the list of locked addresses to allow checkpointing. More...

void	addLockedAddr (LockedAddr addr)
	Add a locked address to allow for checkpointing. More...

System *	system () const
	read the system pointer Implemented for completeness with the setter More...

void	system (System *sys)
	Set the system pointer on this memory This can't be done via a python parameter because the system needs pointers to all the memories and the reverse would create a cycle in the object graph. More...

const Params *	params () const

AddrRange	getAddrRange () const
	Get the address range. More...

uint8_t *	toHostAddr (Addr addr) const
	Transform a gem5 address space address into its physical counterpart in the host address space. More...

uint64_t	size () const
	Get the memory size. More...

Addr	start () const
	Get the start address. More...

bool	isConfReported () const
	Should this memory be passed to the kernel and part of the OS physical memory layout. More...

bool	isInAddrMap () const
	Some memories are used as shadow memories or should for other reasons not be part of the global address map. More...

bool	isKvmMap () const
	When shadow memories are in use, KVM may want to make one or the other, but cannot map both into the guest address space. More...

void	access (PacketPtr pkt)
	Perform an untimed memory access and update all the state (e.g. More...

void	functionalAccess (PacketPtr pkt)
	Perform an untimed memory read or write without changing anything but the memory itself. 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...

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	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...

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

virtual void	startup ()
	startup() is the final initialization call before simulation. 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
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)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers. More...

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)
	Event manger manages events in the event queue. More...

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

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 Stats::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group. More...

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters. More...

virtual void	resetStats ()
	Callback to reset stats. More...

virtual void	preDumpStats ()
	Callback before stats are dumped. More...

void	addStat (Stats::Info *info)
	Register a stat with this group. More...

const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object. More...

const std::vector< Info * > &	getStats () const
	Get all stats associated with this object. More...

void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block. More...

const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group. More...

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from Clocked
void	updateClockPeriod ()
	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

Public Attributes
uint16_t	numReadsToIssue

uint32_t	numWritesQueued

Public Attributes inherited from MemInterface
const uint32_t	readBufferSize
	Buffer sizes for read and write queues in the controller These are passed to the controller on instantiation Defining them here allows for buffers to be resized based on memory type / configuration. More...

const uint32_t	writeBufferSize

Public Attributes inherited from ClockedObject
PowerState *	powerState

Private Member Functions
void	processWriteRespondEvent ()

void	processReadReadyEvent ()

bool	writeRespQueueEmpty () const
	Check if the write response queue is empty. More...

Private Attributes
const uint32_t	maxPendingWrites
	NVM specific device and channel characteristics. More...

const uint32_t	maxPendingReads

const bool	twoCycleRdWr

const Tick	tREAD
	NVM specific timing requirements. More...

const Tick	tWRITE

const Tick	tSEND

NVMStats	stats

EventFunctionWrapper	writeRespondEvent

EventFunctionWrapper	readReadyEvent

std::vector< Rank * >	ranks
	Vector of nvm ranks. More...

std::list< Tick >	writeRespQueue
	Holding queue for non-deterministic write commands, which maintains writes that have been issued but have not completed Stored seperately mostly to keep the code clean and help with events scheduling. More...

std::deque< Tick >	readReadyQueue

Tick	nextReadAt
	Till when must we wait before issuing next read command? More...

uint16_t	numPendingReads

uint16_t	numReadDataReady

Additional Inherited Members
Public Types inherited from MemInterface
typedef MemInterfaceParams	Params

Public Types inherited from AbstractMemory
typedef AbstractMemoryParams	Params

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

Public Types inherited from SimObject
typedef SimObjectParams	Params

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 ()
	Gets the fully-qualified name of the active section. More...

static void	serializeAll (const std::string &cpt_dir)
	Serializes all the SimObjects. More...

static void	unserializeGlobals (CheckpointIn &cp)

Protected Member Functions inherited from MemInterface
virtual Tick	writeToReadDelay () const

Tick	readToWriteDelay () const

Tick	rankToRankDelay () const

Protected Member Functions inherited from AbstractMemory
bool	checkLockedAddrList (PacketPtr pkt)

void	trackLoadLocked (PacketPtr pkt)

bool	writeOK (PacketPtr pkt)

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...

virtual void	clockPeriodUpdated ()
	A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed. More...

Protected Attributes inherited from MemInterface
MemCtrl *	ctrl
	A pointer to the parent MemCtrl instance. More...

unsigned int	maxCommandsPerWindow
	Number of commands that can issue in the defined controller command window, used to verify command bandwidth. More...

Enums::AddrMap	addrMapping
	Memory controller configuration initialized based on parameter values. More...

const uint32_t	burstSize
	General device and channel characteristics The rowsPerBank is determined based on the capacity, number of ranks and banks, the burst size, and the row buffer size. More...

const uint32_t	deviceSize

const uint32_t	deviceRowBufferSize

const uint32_t	devicesPerRank

const uint32_t	rowBufferSize

const uint32_t	burstsPerRowBuffer

const uint32_t	burstsPerStripe

const uint32_t	ranksPerChannel

const uint32_t	banksPerRank

uint32_t	rowsPerBank

const Tick M5_CLASS_VAR_USED	tCK
	General timing requirements. More...

const Tick	tCS

const Tick	tBURST

const Tick	tRTW

const Tick	tWTR

Protected Attributes inherited from AbstractMemory
AddrRange	range

uint8_t *	pmemAddr

MemBackdoor	backdoor

const bool	confTableReported

const bool	inAddrMap

const bool	kvmMap

std::list< LockedAddr >	lockedAddrList

System *	_system
	Pointer to the System object. More...

AbstractMemory::MemStats	stats

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

Interface to NVM devices with media specific parameters, statistics, and functions.

The NVMInterface includes a class for individual ranks and per rank functions.

Definition at line 1021 of file mem_interface.hh.

Constructor & Destructor Documentation

◆ NVMInterface()

NVMInterface::NVMInterface ( const NVMInterfaceParams * _p )

Definition at line 1999 of file mem_interface.cc.

References processWriteRespondEvent().

Member Function Documentation

◆ accessLatency()

Tick NVMInterface::accessLatency ( ) const

inlineoverridevirtual

Implements MemInterface.

Definition at line 1228 of file mem_interface.hh.

References tREAD, and tSEND.

Referenced by MemCtrl::recvAtomic().

◆ addRankToRankDelay()

void NVMInterface::addRankToRankDelay ( Tick cmd_at )

overridevirtual

Add rank to rank delay to bus timing to all NVM banks in alli ranks when access to an alternate interface is issued.

param cmd_at Time of current command used as starting point for addition of rank-to-rank delay

Implements MemInterface.

Definition at line 2452 of file mem_interface.cc.

References MemInterface::banksPerRank, ArmISA::i, ArmISA::n, ranks, and MemInterface::rankToRankDelay().

Referenced by MemCtrl::doBurstAccess().

◆ allRanksDrained()

bool NVMInterface::allRanksDrained ( ) const

inlineoverridevirtual

Check drain state of NVM interface.

Returns: true if write response queue is empty

Implements MemInterface.

Definition at line 1169 of file mem_interface.hh.

References writeRespQueueEmpty().

Referenced by MemCtrl::allIntfDrained().

◆ burstReady()

bool NVMInterface::burstReady ( MemPacket * pkt ) const

overridevirtual

Check if a burst operation can be issued to the NVM.

Parameters

Return true if RD/WR can issue for reads, also verfy that ready count has been updated to a non-zero value to account for race conditions between events

Implements MemInterface.

Definition at line 2269 of file mem_interface.cc.

References MemInterface::ctrl, curTick(), MemCtrl::inReadBusState(), MemPacket::isRead(), numReadDataReady, MemPacket::readyTime, and writeRespQueueFull().

Referenced by chooseNextFRFCFS(), and MemCtrl::packetReady().

◆ chooseNextFRFCFS()

pair< MemPacketQueue::iterator, Tick > NVMInterface::chooseNextFRFCFS	(	MemPacketQueue &	queue,
		Tick	min_col_at
	)		const

overridevirtual

For FR-FCFS policy, find first NVM command that can issue default to first command to prepped region.

Parameters

queue	Queued requests to consider
min_col_at	Minimum tick for 'seamless' issue

Returns: an iterator to the selected packet, else queue.end(); the tick when the packet selected will issue

Implements MemInterface.

Definition at line 2073 of file mem_interface.cc.

References MemPacket::bank, burstReady(), DPRINTF, ArmISA::i, MemPacket::isDram(), MemPacket::isRead(), MaxTick, MemPacket::rank, ranks, MemInterface::Bank::rdAllowedAt, and MemInterface::Bank::wrAllowedAt.

Referenced by MemCtrl::chooseNextFRFCFS().

◆ chooseRead()

void NVMInterface::chooseRead ( MemPacketQueue & queue )

Select read command to issue asynchronously.

Definition at line 2129 of file mem_interface.cc.

References MemInterface::Bank::actAllowedAt, MemInterface::Bank::bank, MemPacket::bank, MemInterface::burstSize, MemInterface::Bank::bytesAccessed, NVMInterface::NVMStats::bytesPerBank, MemInterface::ctrl, curTick(), DPRINTF, ArmISA::i, MemPacket::isDram(), MemPacket::isRead(), MemInterface::maxCommandsPerWindow, maxPendingReads, MaxTick, nextReadAt, numPendingReads, numReadsToIssue, MemInterface::Bank::openRow, MemPacket::rank, ranks, readReadyEvent, readReadyQueue, MemPacket::readyTime, EventManager::reschedule(), MemPacket::row, Stats::DistBase< Derived, Stor >::sample(), EventManager::schedule(), Event::scheduled(), stats, MemInterface::tCK, tREAD, twoCycleRdWr, MemCtrl::verifyMultiCmd(), MemCtrl::verifySingleCmd(), and Event::when().

Referenced by MemCtrl::processNextReqEvent().

◆ commandOffset()

Tick NVMInterface::commandOffset ( ) const

inlineoverridevirtual

Implements MemInterface.

Definition at line 1174 of file mem_interface.hh.

References MemInterface::tBURST.

Referenced by MemCtrl::doBurstAccess(), and MemCtrl::startup().

◆ doBurstAccess()

pair< Tick, Tick > NVMInterface::doBurstAccess	(	MemPacket *	pkt,
		Tick	next_burst_at
	)

Actually do the burst and update stats.

Parameters

pkt	The packet created from the outside world pkt
next_burst_at	Minimum bus timing requirement from controller

Returns: pair, tick when current burst is issued and tick when next burst can issue

Definition at line 2278 of file mem_interface.cc.

Referenced by MemCtrl::doBurstAccess().

◆ init()

void NVMInterface::init ( )

overridevirtual

Initialize the NVM interface and verify parameters.

Reimplemented from SimObject.

Definition at line 2056 of file mem_interface.cc.

References SimObject::init().

◆ isBusy()

bool NVMInterface::isBusy	(	bool	read_queue_empty,
		bool	all_writes_nvm
	)

This function checks if ranks are busy.

This state is true when either: 1) There is no command with read data ready to transmit or 2) The NVM inteface has reached the maximum number of outstanding writes commands.

Parameters

read_queue_empty	There are no read queued
all_writes_nvm	All writes in queue are for NVM interface

Returns: true of NVM is busy

Definition at line 2469 of file mem_interface.cc.

References MemInterface::ctrl, DPRINTF, MemCtrl::inReadBusState(), numReadDataReady, and writeRespQueueFull().

Referenced by MemCtrl::processNextReqEvent().

◆ processReadReadyEvent()

void NVMInterface::processReadReadyEvent ( )

private

Definition at line 2224 of file mem_interface.cc.

References MemInterface::ctrl, curTick(), DPRINTF, ArmISA::i, MaxTick, numPendingReads, numReadDataReady, readReadyEvent, readReadyQueue, MemCtrl::requestEventScheduled(), MemCtrl::restartScheduler(), EventManager::schedule(), and Event::scheduled().

◆ processWriteRespondEvent()

void NVMInterface::processWriteRespondEvent ( )

private

Definition at line 2423 of file mem_interface.cc.

References MemInterface::ctrl, curTick(), DPRINTF, NVMInterface::NVMStats::pendingWrites, MemCtrl::requestEventScheduled(), MemCtrl::restartScheduler(), Stats::DistBase< Derived, Stor >::sample(), EventManager::schedule(), Event::scheduled(), stats, writeRespondEvent, and writeRespQueue.

Referenced by NVMInterface().

◆ readsWaitingToIssue()

bool NVMInterface::readsWaitingToIssue ( ) const

inline

Definition at line 1242 of file mem_interface.hh.

References maxPendingReads, numPendingReads, and numReadsToIssue.

Referenced by MemCtrl::processNextReqEvent().

◆ setupRank()

void NVMInterface::setupRank	(	const uint8_t	rank,
		const bool	is_read
	)

overridevirtual

Setup the rank based on packet received.

Parameters

integer	value of rank to be setup. used to index ranks vector
are	we setting up rank for read or write packet?

Implements MemInterface.

Definition at line 2061 of file mem_interface.cc.

References numReadsToIssue, and numWritesQueued.

Referenced by MemCtrl::addToReadQueue(), and MemCtrl::addToWriteQueue().

◆ writeRespQueueEmpty()

bool NVMInterface::writeRespQueueEmpty ( ) const

inlineprivate

Check if the write response queue is empty.

Parameters

Return true if empty

Definition at line 1131 of file mem_interface.hh.

References writeRespQueue.

Referenced by allRanksDrained(), and doBurstAccess().

◆ writeRespQueueFull()

bool NVMInterface::writeRespQueueFull ( ) const

inline

Check if the write response queue has reached defined threshold.

Parameters

Return true if full

Definition at line 1236 of file mem_interface.hh.

References maxPendingWrites, and writeRespQueue.

Referenced by burstReady(), doBurstAccess(), isBusy(), and MemCtrl::processNextReqEvent().

Member Data Documentation

◆ maxPendingReads

const uint32_t NVMInterface::maxPendingReads

private

Definition at line 1050 of file mem_interface.hh.

Referenced by chooseRead(), and readsWaitingToIssue().

◆ maxPendingWrites

const uint32_t NVMInterface::maxPendingWrites

private

NVM specific device and channel characteristics.

Definition at line 1049 of file mem_interface.hh.

Referenced by writeRespQueueFull().

◆ nextReadAt

Tick NVMInterface::nextReadAt

private

Till when must we wait before issuing next read command?

Definition at line 1136 of file mem_interface.hh.

Referenced by chooseRead().

◆ numPendingReads

uint16_t NVMInterface::numPendingReads

private

Definition at line 1140 of file mem_interface.hh.

Referenced by chooseRead(), doBurstAccess(), processReadReadyEvent(), and readsWaitingToIssue().

◆ numReadDataReady

uint16_t NVMInterface::numReadDataReady

private

Definition at line 1141 of file mem_interface.hh.

Referenced by burstReady(), doBurstAccess(), isBusy(), and processReadReadyEvent().

◆ numReadsToIssue

uint16_t NVMInterface::numReadsToIssue

Definition at line 1145 of file mem_interface.hh.

Referenced by chooseRead(), readsWaitingToIssue(), and setupRank().

◆ numWritesQueued

uint32_t NVMInterface::numWritesQueued

Definition at line 1148 of file mem_interface.hh.

Referenced by doBurstAccess(), MemCtrl::processNextReqEvent(), and setupRank().

◆ ranks

std::vector<Rank*> NVMInterface::ranks

private

Vector of nvm ranks.

Definition at line 1112 of file mem_interface.hh.

Referenced by addRankToRankDelay(), chooseNextFRFCFS(), chooseRead(), and doBurstAccess().

◆ readReadyEvent

EventFunctionWrapper NVMInterface::readReadyEvent

private

Definition at line 1107 of file mem_interface.hh.

Referenced by chooseRead(), and processReadReadyEvent().

◆ readReadyQueue

std::deque<Tick> NVMInterface::readReadyQueue

private

Definition at line 1124 of file mem_interface.hh.

Referenced by chooseRead(), and processReadReadyEvent().

◆ stats

NVMStats NVMInterface::stats

private

Definition at line 1101 of file mem_interface.hh.

Referenced by chooseRead(), doBurstAccess(), and processWriteRespondEvent().

◆ tREAD

const Tick NVMInterface::tREAD

private

NVM specific timing requirements.

Definition at line 1056 of file mem_interface.hh.

Referenced by accessLatency(), and chooseRead().

◆ tSEND

const Tick NVMInterface::tSEND

private

Definition at line 1058 of file mem_interface.hh.

Referenced by accessLatency(), and doBurstAccess().

◆ twoCycleRdWr

const bool NVMInterface::twoCycleRdWr

private

Definition at line 1051 of file mem_interface.hh.

Referenced by chooseRead(), and doBurstAccess().

◆ tWRITE

const Tick NVMInterface::tWRITE

private

Definition at line 1057 of file mem_interface.hh.

Referenced by doBurstAccess().

◆ writeRespondEvent

EventFunctionWrapper NVMInterface::writeRespondEvent

private

Definition at line 1104 of file mem_interface.hh.

Referenced by doBurstAccess(), and processWriteRespondEvent().

◆ writeRespQueue

std::list<Tick> NVMInterface::writeRespQueue

private

Holding queue for non-deterministic write commands, which maintains writes that have been issued but have not completed Stored seperately mostly to keep the code clean and help with events scheduling.

This mimics a buffer on the media controller and therefore is not added to the main write queue for sizing

Definition at line 1122 of file mem_interface.hh.

Referenced by doBurstAccess(), processWriteRespondEvent(), writeRespQueueEmpty(), and writeRespQueueFull().

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

mem/mem_interface.hh
mem/mem_interface.cc

Classes

Public Member Functions

Public Attributes

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ NVMInterface()

Member Function Documentation

◆ accessLatency()

◆ addRankToRankDelay()

◆ allRanksDrained()

◆ burstReady()

◆ chooseNextFRFCFS()

◆ chooseRead()

◆ commandOffset()

◆ doBurstAccess()

◆ init()

◆ isBusy()

◆ processReadReadyEvent()

◆ processWriteRespondEvent()

◆ readsWaitingToIssue()

◆ setupRank()

◆ writeRespQueueEmpty()

◆ writeRespQueueFull()

Member Data Documentation

◆ maxPendingReads

◆ maxPendingWrites

◆ nextReadAt

◆ numPendingReads

◆ numReadDataReady

◆ numReadsToIssue

◆ numWritesQueued

◆ ranks

◆ readReadyEvent

◆ readReadyQueue

◆ stats

◆ tREAD

◆ tSEND

◆ twoCycleRdWr

◆ tWRITE

◆ writeRespondEvent

◆ writeRespQueue