gem5::TaggedEntry Class Reference

A tagged entry is an entry containing a tag. More...

#include <tagged_entry.hh>

Inheritance diagram for gem5::TaggedEntry:

Public Types
using	KeyType = TaggedTypes::KeyType
using	IndexingPolicy = TaggedIndexingPolicy
using	TagExtractor = std::function< Addr(Addr)>

Public Member Functions
	TaggedEntry ()
	~TaggedEntry ()=default
void	registerTagExtractor (TagExtractor ext)
virtual bool	isValid () const
	Checks if the entry is valid.
bool	isSecure () const
	Check if this block holds data from the secure memory space.
virtual Addr	getTag () const
	Get tag associated to this block.
bool	match (const KeyType &key) const
	Checks if the given tag information corresponds to this entry's.
virtual void	insert (const KeyType &key)
	Insert the block by assigning it a tag and marking it valid.
virtual void	invalidate ()
	Invalidate the block.
std::string	print () const override
	Prints relevant information about this entry.
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.

Protected Member Functions
virtual void	setTag (Addr tag)
	Set tag associated to this block.
virtual void	setSecure ()
	Set secure bit.
void	clearSecure ()
	Clear secure bit.
virtual void	setValid ()
	Set valid bit.

Protected Attributes
TagExtractor	extractTag
	Callback used to extract the tag from the entry.
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.

Private Attributes
bool	_valid
	Valid bit.
bool	_secure
	Secure bit.
Addr	_tag
	The entry's tag.

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

Detailed Description

A tagged entry is an entry containing a tag.

Each tag is accompanied by a secure bit, which informs whether it belongs to a secure address space. A tagged entry's contents are only relevant if it is marked as valid.

Definition at line 110 of file tagged_entry.hh.

Member Typedef Documentation

IndexingPolicy

using gem5::TaggedEntry::IndexingPolicy = TaggedIndexingPolicy

Definition at line 114 of file tagged_entry.hh.

KeyType

using gem5::TaggedEntry::KeyType = TaggedTypes::KeyType

Definition at line 113 of file tagged_entry.hh.

TagExtractor

using gem5::TaggedEntry::TagExtractor = std::function<Addr(Addr)>

Definition at line 115 of file tagged_entry.hh.

Constructor & Destructor Documentation

TaggedEntry()

gem5::TaggedEntry::TaggedEntry ( )

inline

Definition at line 117 of file tagged_entry.hh.

~TaggedEntry()

gem5::TaggedEntry::~TaggedEntry ( )

default

Member Function Documentation

clearSecure()

void gem5::TaggedEntry::clearSecure ( )

inlineprotected

Clear secure bit.

Should be only used by the invalidation function.

Definition at line 206 of file tagged_entry.hh.

getTag()

virtual Addr gem5::TaggedEntry::getTag ( ) const

inlinevirtual

Get tag associated to this block.

Returns

The tag value.

Reimplemented in gem5::SectorSubBlk.

Definition at line 147 of file tagged_entry.hh.

Referenced by gem5::FALRU::findBlock(), gem5::SectorSubBlk::getTag(), gem5::FALRU::insertBlock(), gem5::FALRU::invalidate(), gem5::BaseSetAssoc::regenerateBlkAddr(), gem5::FALRU::regenerateBlkAddr(), gem5::SectorTags::regenerateBlkAddr(), and gem5::prefetch::IndirectMemory::trackMissIndex2().

insert()

virtual void gem5::TaggedEntry::insert ( const KeyType &  key )

inlinevirtual

Insert the block by assigning it a tag and marking it valid.

Touches block if it hadn't been touched previously.

Parameters

tag	The tag value.

Reimplemented in gem5::CacheBlk, gem5::TempCacheBlk, and gem5::SectorSubBlk.

Definition at line 170 of file tagged_entry.hh.

References gem5::TaggedTypes::KeyType::address, and gem5::TaggedTypes::KeyType::secure.

Referenced by gem5::SectorSubBlk::insert().

invalidate()

virtual void gem5::TaggedEntry::invalidate ( )

inlinevirtual

Invalidate the block.

Its contents are no longer valid.

Reimplemented in gem5::CacheBlk, gem5::TempCacheBlk, gem5::prefetch::AccessMapPatternMatching::AccessMapEntry, gem5::prefetch::IndirectMemory::PrefetchTableEntry, gem5::prefetch::IndirectMemory::IndirectPatternDetectorEntry, gem5::prefetch::IrregularStreamBuffer::AddressMappingEntry, gem5::prefetch::SignaturePath::PatternEntry, gem5::prefetch::STeMS::ActiveGenerationTableEntry, gem5::prefetch::Stride::StrideEntry, gem5::SectorSubBlk, gem5::CompressionBlk, and gem5::SuperBlk.

Definition at line 180 of file tagged_entry.hh.

References gem5::MaxAddr.

Referenced by gem5::CacheBlk::invalidate(), gem5::prefetch::AccessMapPatternMatching::AccessMapEntry::invalidate(), gem5::prefetch::IndirectMemory::PrefetchTableEntry::invalidate(), gem5::prefetch::IndirectMemory::IndirectPatternDetectorEntry::invalidate(), gem5::prefetch::IrregularStreamBuffer::AddressMappingEntry::invalidate(), gem5::prefetch::SignaturePath::PatternEntry::invalidate(), gem5::prefetch::STeMS::ActiveGenerationTableEntry::invalidate(), gem5::prefetch::Stride::StrideEntry::invalidate(), gem5::SuperBlk::invalidate(), and gem5::SectorBlk::invalidateSubBlk().

isSecure()

bool gem5::TaggedEntry::isSecure ( ) const

inline

Check if this block holds data from the secure memory space.

Returns

True if the block holds data from the secure memory space.

Definition at line 140 of file tagged_entry.hh.

Referenced by gem5::Cache::cleanEvictBlk(), gem5::BaseCache::cmpAndSwap(), gem5::FALRU::findBlock(), gem5::BaseCache::handleFill(), gem5::FALRU::insertBlock(), gem5::FALRU::invalidate(), gem5::CacheBlkPrintWrapper::print(), gem5::SectorTags::regenerateBlkAddr(), gem5::BaseCache::satisfyRequest(), gem5::BaseCache::updateBlockData(), gem5::BaseCache::updateCompressionData(), gem5::BaseCache::writebackBlk(), gem5::BaseCache::writebackVisitor(), and gem5::BaseCache::writecleanBlk().

isValid()

virtual bool gem5::TaggedEntry::isValid ( ) const

inlinevirtual

Checks if the entry is valid.

Returns

True if the entry is valid.

Reimplemented in gem5::SectorBlk.

Definition at line 133 of file tagged_entry.hh.

Referenced by gem5::BaseCache::access(), gem5::Cache::access(), gem5::NoncoherentCache::access(), gem5::FALRU::accessBlock(), gem5::Cache::cleanEvictBlk(), gem5::BaseTags::cleanupRefsVisitor(), gem5::BaseTags::computeStatsVisitor(), gem5::Cache::createMissPacket(), gem5::NoncoherentCache::createMissPacket(), gem5::FALRU::findBlock(), gem5::CompressedTags::findVictim(), gem5::SectorTags::findVictim(), gem5::BaseCache::functionalAccess(), gem5::SectorSubBlk::getTag(), gem5::Cache::handleAtomicReqMiss(), gem5::BaseCache::handleFill(), gem5::Cache::handleSnoop(), gem5::Cache::handleTimingReqMiss(), gem5::NoncoherentCache::handleTimingReqMiss(), gem5::BaseCache::handleTimingReqMiss(), gem5::CacheBlk::insert(), gem5::BaseTags::insertBlock(), gem5::BaseTags::invalidate(), gem5::BaseCache::invalidateBlock(), gem5::BaseCache::invalidateVisitor(), gem5::CacheBlk::isSet(), gem5::BaseCache::maintainClusivity(), gem5::BaseTags::moveBlock(), gem5::SectorTags::moveBlock(), gem5::CacheBlk::operator=(), gem5::CacheBlk::print(), gem5::CacheBlkPrintWrapper::print(), gem5::FALRU::CacheTracking::recordAccess(), gem5::BaseCache::recvAtomic(), gem5::BaseCache::recvTimingReq(), gem5::BaseCache::recvTimingResp(), gem5::BaseCache::satisfyRequest(), gem5::Cache::serviceMSHRTargets(), gem5::CacheBlk::setCoherenceBits(), gem5::BaseCache::writebackBlk(), and gem5::BaseCache::writebackVisitor().

match()

bool gem5::TaggedEntry::match ( const KeyType &  key ) const

inline

Checks if the given tag information corresponds to this entry's.

Parameters

tag	The tag value to compare to.
is_secure	Whether secure bit is set.

Returns

True if the tag information match this entry's.

Definition at line 157 of file tagged_entry.hh.

References gem5::TaggedTypes::KeyType::address, gem5::ArmISA::isSecure(), and gem5::TaggedTypes::KeyType::secure.

Referenced by gem5::BaseTags::findBlock(), gem5::CompressedTags::findVictim(), gem5::SectorTags::findVictim(), and gem5::SectorSubBlk::insert().

print()

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

inlineoverridevirtual

Prints relevant information about this entry.

Returns

A string containg the contents of this entry.

Reimplemented from gem5::ReplaceableEntry.

Definition at line 188 of file tagged_entry.hh.

References gem5::csprintf(), gem5::ArmISA::isSecure(), and gem5::ReplaceableEntry::print().

Referenced by gem5::CacheBlk::print(), and gem5::SectorBlk::print().

registerTagExtractor()

void gem5::TaggedEntry::registerTagExtractor ( TagExtractor  ext )

inline

Definition at line 123 of file tagged_entry.hh.

References gem5::ArmISA::ext.

Referenced by gem5::prefetch::AccessMapPatternMatching::AccessMapEntry::AccessMapEntry(), gem5::prefetch::STeMS::ActiveGenerationTableEntry::ActiveGenerationTableEntry(), gem5::prefetch::IrregularStreamBuffer::AddressMappingEntry::AddressMappingEntry(), gem5::prefetch::SignaturePathV2::GlobalHistoryEntry::GlobalHistoryEntry(), gem5::prefetch::PIF::IndexEntry::IndexEntry(), gem5::prefetch::IndirectMemory::IndirectPatternDetectorEntry::IndirectPatternDetectorEntry(), gem5::prefetch::SignaturePath::PatternEntry::PatternEntry(), gem5::prefetch::IndirectMemory::PrefetchTableEntry::PrefetchTableEntry(), gem5::prefetch::SignaturePath::SignatureEntry::SignatureEntry(), gem5::prefetch::Stride::StrideEntry::StrideEntry(), gem5::BaseSetAssoc::tagsInit(), gem5::TempCacheBlk::TempCacheBlk(), and gem5::prefetch::IrregularStreamBuffer::TrainingUnitEntry::TrainingUnitEntry().

setSecure()

virtual void gem5::TaggedEntry::setSecure ( )

inlineprotectedvirtual

Set secure bit.

Definition at line 203 of file tagged_entry.hh.

setTag()

virtual void gem5::TaggedEntry::setTag ( Addr  tag )

inlineprotectedvirtual

Set tag associated to this block.

Parameters

tag	The tag value.

Definition at line 200 of file tagged_entry.hh.

setValid()

virtual void gem5::TaggedEntry::setValid ( )

inlineprotectedvirtual

Set valid bit.

The block must be invalid beforehand.

Reimplemented in gem5::SectorSubBlk.

Definition at line 210 of file tagged_entry.hh.

Referenced by gem5::SectorSubBlk::setValid().

Member Data Documentation

_secure

bool gem5::TaggedEntry::_secure

private

Secure bit.

Marks whether this entry refers to an address in the secure memory space. Must always be modified along with the tag.

Definition at line 231 of file tagged_entry.hh.

_tag

Addr gem5::TaggedEntry::_tag

private

The entry's tag.

Definition at line 234 of file tagged_entry.hh.

_valid

bool gem5::TaggedEntry::_valid

private

Valid bit.

The contents of this entry are only valid if this bit is set.

See also

invalidate()

insert()

Definition at line 225 of file tagged_entry.hh.

extractTag

TagExtractor gem5::TaggedEntry::extractTag

protected

Callback used to extract the tag from the entry.

Definition at line 217 of file tagged_entry.hh.

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

• mem/cache/tags/tagged_entry.hh