A fully associative cache block. More...

#include <fa_lru.hh>

Inheritance diagram for gem5::FALRUBlk:

Public Member Functions
	FALRUBlk ()

std::string	print () const override
	Pretty-print inCachesMask and other CacheBlk information.

CacheBlk &	operator= (const CacheBlk &)=delete

virtual CacheBlk &	operator= (CacheBlk &&other)
	Move assignment operator.

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

	CacheBlk (const CacheBlk &)=delete

CacheBlk &	operator= (const CacheBlk &)=delete

	CacheBlk (const CacheBlk &&)=delete

virtual	~CacheBlk ()

virtual void	invalidate () override
	Invalidate the block and clear all state.

void	setCoherenceBits (unsigned bits)
	Sets the corresponding coherence bits.

void	clearCoherenceBits (unsigned bits)
	Clear the corresponding coherence bits.

bool	isSet (unsigned bits) const
	Checks the given coherence bits are set.

bool	wasPrefetched () const
	Check if this block was the result of a hardware prefetch, yet to be touched.

void	clearPrefetched ()
	Clear the prefetching bit.

void	setPrefetched ()
	Marks this blocks as a recently prefetched block.

Tick	getWhenReady () const
	Get tick at which block's data will be available for access.

void	setWhenReady (const Tick tick)
	Set tick at which block's data will be available for access.

uint32_t	getTaskId () const
	Get the task id associated to this block.

uint32_t	getSrcRequestorId () const
	Get the requestor id associated to this block.

uint64_t	getPartitionId () const
	Getter for _partitionId.

unsigned	getRefCount () const
	Get the number of references to this block since insertion.

void	increaseRefCount ()
	Get the number of references to this block since insertion.

Tick	getAge () const
	Get the block's age, that is, the number of ticks since its insertion.

void	insert (const Addr tag, const bool is_secure, const int src_requestor_ID, const uint32_t task_ID, const uint64_t partition_id)
	Set member variables when a block insertion occurs.

void	trackLoadLocked (PacketPtr pkt)
	Track the fact that a local locked was issued to the block.

void	clearLoadLocks (const RequestPtr &req)
	Clear the any load lock that intersect the request, and is from a different context.

bool	checkWrite (PacketPtr pkt)
	Handle interaction of load-locked operations and stores.

virtual void	insert (const Addr tag, const bool is_secure)
	Insert the block by assigning it a tag and marking it valid.

void	insert (const Addr tag) override
	Insert the block by assigning it a tag and marking it valid.

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

	~TaggedEntry ()=default

bool	isSecure () const
	Check if this block holds data from the secure memory space.

virtual bool	matchTag (Addr tag, bool is_secure) const
	Checks if the given tag information corresponds to this entry's.

void	invalidate () override
	Invalidate the block.

std::string	print () const override
	Prints relevant information about this entry.

bool	matchTag (const Addr tag) const override
	Checks if the given tag information corresponds to this entry's.

void	insert (const Addr tag) override
	Insert the block by assigning it a tag and marking it valid.

Public Member Functions inherited from gem5::CacheEntry
	CacheEntry ()=default

	~CacheEntry ()=default

virtual bool	isValid () const
	Checks if the entry is valid.

virtual Addr	getTag () const
	Get tag associated to this block.

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

virtual	~ReplaceableEntry ()=default

virtual void	setPosition (const uint32_t set, const uint32_t way)
	Set both the set and way.

uint32_t	getSet () const
	Get set number.

uint32_t	getWay () const
	Get way number.

Public Attributes
FALRUBlk *	prev
	The previous block in LRU order.

FALRUBlk *	next
	The next block in LRU order.

CachesMask	inCachesMask
	A bit mask of the caches that fit this block.

Public Attributes inherited from gem5::CacheBlk
uint8_t *	data = nullptr
	Contains a copy of the data in this block for easy access.

Tick	whenReady = 0
	Which curTick() will this block be accessible.

Public Attributes inherited from gem5::ReplaceableEntry
std::shared_ptr< replacement_policy::ReplacementData >	replacementData
	Replacement data associated to this entry.

Additional Inherited Members
Public Types inherited from gem5::CacheBlk
enum	CoherenceBits : unsigned { WritableBit = 0x02 , ReadableBit = 0x04 , DirtyBit = 0x08 , AllBits = 0x0E }
	Cache block's enum listing the supported coherence bits. More...

Protected Member Functions inherited from gem5::CacheBlk
void	setTaskId (const uint32_t task_id)
	Set the task id value.

void	setSrcRequestorId (const uint32_t id)
	Set the source requestor id.

void	setPartitionId (const uint64_t partitionId)
	Setter for _partitionId.

void	setRefCount (const unsigned count)
	Set the number of references to this block since insertion.

void	setTickInserted ()
	Set the current tick as this block's insertion tick.

Protected Member Functions inherited from gem5::TaggedEntry
virtual void	setSecure ()
	Set secure bit.

Protected Member Functions inherited from gem5::CacheEntry
virtual void	setTag (Addr _tag)
	Set tag associated to this block.

virtual void	setValid ()
	Set valid bit.

Protected Attributes inherited from gem5::CacheBlk
std::list< Lock >	lockList
	List of thread contexts that have performed a load-locked (LL) on the block since the last store.

unsigned	coherence
	The current coherence status of this block.

Protected Attributes inherited from gem5::ReplaceableEntry
uint32_t	_set
	Set to which this entry belongs.

uint32_t	_way
	Way (relative position within the set) to which this entry belongs.

Detailed Description

A fully associative cache block.

Definition at line 85 of file fa_lru.hh.

Constructor & Destructor Documentation

◆ FALRUBlk()

gem5::FALRUBlk::FALRUBlk ( )

inline

Definition at line 88 of file fa_lru.hh.

Member Function Documentation

◆ operator=() [1/2]

virtual CacheBlk & gem5::CacheBlk::operator= ( CacheBlk && other )

inlinevirtual

Move assignment operator.

This should only be used to move an existing valid entry into an invalid one, not to create a new entry. In the end the valid entry will become invalid, and the invalid, valid. All location related variables will remain the same, that is, an entry cannot move its data, just its metadata contents.

Reimplemented from gem5::CacheBlk.

Definition at line 173 of file cache_blk.hh.

◆ operator=() [2/2]

CacheBlk & gem5::CacheBlk::operator= ( const CacheBlk & )

delete

◆ print()

std::string gem5::FALRUBlk::print ( ) const

overridevirtual

Pretty-print inCachesMask and other CacheBlk information.

Returns: string with basic state information

Reimplemented from gem5::CacheBlk.

Definition at line 63 of file fa_lru.cc.

References gem5::csprintf(), inCachesMask, and gem5::CacheBlk::print().

Member Data Documentation

◆ inCachesMask

CachesMask gem5::FALRUBlk::inCachesMask

A bit mask of the caches that fit this block.

Definition at line 97 of file fa_lru.hh.

Referenced by gem5::FALRU::accessBlock(), gem5::FALRU::CacheTracking::check(), gem5::FALRU::CacheTracking::init(), gem5::FALRU::insertBlock(), gem5::FALRU::CacheTracking::moveBlockToHead(), gem5::FALRU::CacheTracking::moveBlockToTail(), print(), and gem5::FALRU::CacheTracking::recordAccess().

◆ next

FALRUBlk* gem5::FALRUBlk::next

The next block in LRU order.

Definition at line 94 of file fa_lru.hh.

Referenced by gem5::FALRU::CacheTracking::check(), gem5::FALRU::CacheTracking::init(), gem5::FALRU::CacheTracking::moveBlockToTail(), gem5::FALRU::moveToHead(), gem5::FALRU::moveToTail(), and gem5::FALRU::tagsInit().

◆ prev

FALRUBlk* gem5::FALRUBlk::prev

The previous block in LRU order.

Definition at line 92 of file fa_lru.hh.

Referenced by gem5::FALRU::CacheTracking::moveBlockToHead(), gem5::FALRU::moveToHead(), gem5::FALRU::moveToTail(), and gem5::FALRU::tagsInit().

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

mem/cache/tags/fa_lru.hh
mem/cache/tags/fa_lru.cc

Public Member Functions

Public Attributes

Additional Inherited Members