#include <tlb.hh>

Inheritance diagram for gem5::X86ISA::TLB:

Classes
struct	TlbStats

Public Types
typedef X86TLBParams	Params

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

Public Member Functions
	TLB (const Params &p)

void	takeOverFrom (BaseTLB *otlb) override
	Take over from an old tlb context.

TlbEntry *	lookup (Addr va, bool update_lru=true)

void	setConfigAddress (uint32_t addr)

Addr	concAddrPcid (Addr vpn, uint64_t pcid)

Walker *	getWalker ()

void	flushAll () override
	Remove all entries from the TLB.

void	flushNonGlobal ()

void	demapPage (Addr va, uint64_t asn) override

void	evictLRU ()

uint64_t	nextSeq ()

Fault	translateAtomic (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) override

Fault	translateFunctional (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) override

void	translateTiming (const RequestPtr &req, ThreadContext tc, BaseMMU::Translation translation, BaseMMU::Mode mode) override

Fault	finalizePhysical (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) const override
	Do post-translation physical address finalization.

TlbEntry *	insert (Addr vpn, const TlbEntry &entry, uint64_t pcid)

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

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

Port *	getTableWalkerPort () override
	Get the table walker port.

Public Member Functions inherited from gem5::BaseTLB
void	memInvalidate ()
	Invalidate the contents of memory buffers.

TypeTLB	type () const

BaseTLB *	nextLevel () const

Public Member Functions inherited from gem5::SimObject
const Params &	params () const

	SimObject (const Params &p)

virtual	~SimObject ()

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

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

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

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

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

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

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

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

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

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

Public Member Functions inherited from gem5::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.

void	setCurTick (Tick newVal)

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

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

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

virtual	~Serializable ()

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

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

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

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

Public Member Functions inherited from gem5::Drainable
DrainState	drainState () const
	Return the current drain state of an object.

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

Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters.

virtual void	resetStats ()
	Callback to reset stats.

virtual void	preDumpStats ()
	Callback before stats are dumped.

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

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

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

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

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

void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Protected Types
typedef std::list< TlbEntry * >	EntryList

Protected Member Functions
EntryList::iterator	lookupIt (Addr va, bool update_lru=true)

Fault	translateInt (bool read, RequestPtr req, ThreadContext *tc)

Fault	translate (const RequestPtr &req, ThreadContext tc, BaseMMU::Translation translation, BaseMMU::Mode mode, bool &delayedResponse, bool timing)

Protected Member Functions inherited from gem5::BaseTLB
	BaseTLB (const BaseTLBParams &p)

Protected Member Functions inherited from gem5::Drainable
	Drainable ()

virtual	~Drainable ()

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

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

Protected Attributes
uint32_t	configAddress

Walker *	walker

uint32_t	size

std::vector< TlbEntry >	tlb

EntryList	freeList

TlbEntryTrie	trie

uint64_t	lruSeq

AddrRange	m5opRange

gem5::X86ISA::TLB::TlbStats	stats

Protected Attributes inherited from gem5::BaseTLB
TypeTLB	_type

BaseTLB *	_nextLevel

Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.

Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Friends
class	Walker

Additional Inherited Members
Static Public Member Functions inherited from gem5::SimObject
static void	serializeAll (const std::string &cpt_dir)
	Create a checkpoint by serializing all SimObjects in the system.

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

static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Detailed Description

Definition at line 60 of file tlb.hh.

Member Typedef Documentation

◆ EntryList

typedef std::list<TlbEntry *> gem5::X86ISA::TLB::EntryList

protected

Definition at line 65 of file tlb.hh.

◆ Params

typedef X86TLBParams gem5::X86ISA::TLB::Params

Definition at line 71 of file tlb.hh.

Constructor & Destructor Documentation

◆ TLB()

gem5::X86ISA::TLB::TLB ( const Params & p )

Definition at line 65 of file tlb.cc.

References fatal, freeList, gem5::X86ISA::p, gem5::X86ISA::Walker::setTLB(), size, tlb, walker, and gem5::X86ISA::x.

Member Function Documentation

◆ concAddrPcid()

Addr gem5::X86ISA::TLB::concAddrPcid	(	Addr	vpn,
		uint64_t	pcid )

inline

Definition at line 80 of file tlb.hh.

References gem5::X86ISA::pcid.

Referenced by insert(), and translate().

◆ demapPage()

void gem5::X86ISA::TLB::demapPage	(	Addr	va,
		uint64_t	asn )

overridevirtual

Implements gem5::BaseTLB.

Definition at line 177 of file tlb.cc.

References freeList, gem5::Trie< Key, Value >::lookup(), gem5::Trie< Key, Value >::remove(), trie, gem5::X86ISA::TlbEntry::trieHandle, and gem5::ArmISA::va.

◆ evictLRU()

void gem5::X86ISA::TLB::evictLRU ( )

Definition at line 94 of file tlb.cc.

References gem5::ArmISA::i, and gem5::ArmISA::tlb.

Referenced by insert().

◆ finalizePhysical()

Fault gem5::X86ISA::TLB::finalizePhysical	(	const RequestPtr &	req,
		ThreadContext *	tc,
		BaseMMU::Mode	mode ) const

overridevirtual

Do post-translation physical address finalization.

Some addresses, for example requests going to the APIC, need post-translation updates. Such physical addresses are remapped into a "magic" part of the physical address space by this method.

Parameters

req	Request to updated in-place.
tc	Thread context that created the request.
mode	Request type (read/write/execute).

Returns: A fault on failure, NoFault otherwise.

Implements gem5::BaseTLB.

Definition at line 273 of file tlb.cc.

References gem5::X86ISA::misc_reg::ApicBase, gem5::AddrRange::contains(), gem5::ThreadContext::contextId(), gem5::pseudo_inst::decodeAddrOffset(), gem5::FullSystem, m5opRange, gem5::X86ISA::mode, gem5::NoFault, gem5::X86ISA::PageBytes, gem5::pseudo_inst::pseudoInst(), gem5::BaseMMU::Read, gem5::ThreadContext::readMiscRegNoEffect(), gem5::Packet::setLE(), gem5::AddrRange::start(), gem5::Request::STRICT_ORDER, gem5::Request::UNCACHEABLE, and gem5::X86ISA::x86LocalAPICAddress().

Referenced by translate().

◆ flushAll()

void gem5::X86ISA::TLB::flushAll ( )

overridevirtual

Remove all entries from the TLB.

Implements gem5::BaseTLB.

Definition at line 145 of file tlb.cc.

References DPRINTF, freeList, gem5::ArmISA::i, gem5::Trie< Key, Value >::remove(), size, tlb, and trie.

◆ flushNonGlobal()

void gem5::X86ISA::TLB::flushNonGlobal ( )

Definition at line 164 of file tlb.cc.

References DPRINTF, freeList, gem5::ArmISA::i, gem5::Trie< Key, Value >::remove(), size, tlb, and trie.

◆ getTableWalkerPort()

Port * gem5::X86ISA::TLB::getTableWalkerPort ( )

overridevirtual

Get the table walker port.

This is used for migrating port connections during a CPU takeOverFrom() call. For architectures that do not have a table walker, NULL is returned, hence the use of a pointer rather than a reference. For X86 this method will always return a valid port pointer.

Returns: A pointer to the walker port

Reimplemented from gem5::BaseTLB.

Definition at line 630 of file tlb.cc.

References gem5::X86ISA::Walker::getPort(), and walker.

◆ getWalker()

Walker * gem5::X86ISA::TLB::getWalker ( )

Definition at line 88 of file tlb.cc.

◆ insert()

TlbEntry * gem5::X86ISA::TLB::insert	(	Addr	vpn,
		const TlbEntry &	entry,
		uint64_t	pcid )

Definition at line 100 of file tlb.cc.

References concAddrPcid(), evictLRU(), freeList, gem5::FullSystem, gem5::Trie< Key, Value >::insert(), gem5::X86ISA::TlbEntry::logBytes, gem5::Trie< Key, Value >::lookup(), gem5::X86ISA::TlbEntry::lruSeq, gem5::Trie< Addr, TlbEntry >::MaxBits, nextSeq(), gem5::X86ISA::pcid, trie, gem5::X86ISA::TlbEntry::trieHandle, and gem5::X86ISA::TlbEntry::vaddr.

Referenced by translate().

◆ lookup()

TlbEntry * gem5::X86ISA::TLB::lookup	(	Addr	va,
		bool	update_lru = true )

Definition at line 136 of file tlb.cc.

References gem5::Trie< Key, Value >::lookup(), gem5::X86ISA::TlbEntry::lruSeq, nextSeq(), trie, and gem5::ArmISA::va.

Referenced by translate().

◆ lookupIt()

EntryList::iterator gem5::X86ISA::TLB::lookupIt	(	Addr	va,
		bool	update_lru = true )

protected

◆ nextSeq()

uint64_t gem5::X86ISA::TLB::nextSeq ( )

inline

Definition at line 133 of file tlb.hh.

References lruSeq.

Referenced by insert(), and lookup().

◆ serialize()

void gem5::X86ISA::TLB::serialize ( CheckpointOut & cp ) const

overridevirtual

Serialize an object.

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

Parameters

cp	Checkpoint state

Reimplemented from gem5::SimObject.

Definition at line 195 of file tlb.cc.

References gem5::csprintf(), gem5::ArmISA::i, and SERIALIZE_SCALAR.

◆ setConfigAddress()

void gem5::X86ISA::TLB::setConfigAddress ( uint32_t addr )

Definition at line 158 of file tlb.cc.

References gem5::X86ISA::addr, and configAddress.

◆ takeOverFrom()

void gem5::X86ISA::TLB::takeOverFrom ( BaseTLB * otlb )

inlineoverridevirtual

Take over from an old tlb context.

Implements gem5::BaseTLB.

Definition at line 74 of file tlb.hh.

◆ translate()

Fault gem5::X86ISA::TLB::translate	(	const RequestPtr &	req,
		ThreadContext *	tc,
		BaseMMU::Translation *	translation,
		BaseMMU::Mode	mode,
		bool &	delayedResponse,
		bool	timing )

protected

Definition at line 322 of file tlb.cc.

References gem5::X86ISA::AddrSizeFlagMask, gem5::X86ISA::AddrSizeFlagShift, gem5::ArmISA::attr, gem5::X86ISA::base, concAddrPcid(), gem5::X86ISA::CPL0FlagBit, gem5::X86ISA::misc_reg::Cr0, gem5::X86ISA::misc_reg::Cr3, gem5::X86ISA::misc_reg::Cr4, gem5::X86ISA::segment_idx::Cs, DPRINTF, gem5::X86ISA::segment_idx::Es, gem5::BaseMMU::Execute, gem5::X86ISA::expandDown, finalizePhysical(), flags, gem5::EmulationPageTable::Entry::flags, gem5::FullSystem, gem5::ThreadContext::getProcessPtr(), gem5::X86ISA::segment_idx::Hs, insert(), gem5::PCStateBase::instAddr(), gem5::X86ISA::limit, gem5::X86ISA::TlbEntry::logBytes, lookup(), gem5::X86ISA::misc_reg::M5Reg, gem5::X86ISA::mask, gem5::X86ISA::mode, gem5::X86ISA::segment_idx::Ms, gem5::NoFault, gem5::X86ISA::offset, gem5::X86ISA::p, gem5::EmulationPageTable::Entry::paddr, gem5::X86ISA::TlbEntry::paddr, gem5::X86ISA::PageShift, gem5::X86ISA::pcid, gem5::ThreadContext::pcState(), gem5::X86ISA::TLB::TlbStats::rdAccesses, gem5::X86ISA::TLB::TlbStats::rdMisses, gem5::BaseMMU::Read, gem5::Request::READ_MODIFY_WRITE, gem5::ThreadContext::readMiscRegNoEffect(), gem5::EmulationPageTable::ReadOnly, gem5::X86ISA::seg, gem5::X86ISA::misc_reg::segAttr(), gem5::X86ISA::misc_reg::segBase(), gem5::X86ISA::misc_reg::segLimit(), gem5::X86ISA::SegmentFlagMask, gem5::X86ISA::SixtyFourBitMode, gem5::X86ISA::Walker::start(), stats, gem5::Request::STRICT_ORDER, translateInt(), gem5::Request::UNCACHEABLE, gem5::EmulationPageTable::Uncacheable, gem5::X86ISA::TlbEntry::uncacheable, gem5::X86ISA::TlbEntry::user, gem5::MipsISA::vaddr, walker, warn_once, gem5::X86ISA::TLB::TlbStats::wrAccesses, gem5::X86ISA::TlbEntry::writable, gem5::BaseMMU::Write, and gem5::X86ISA::TLB::TlbStats::wrMisses.

Referenced by translateAtomic(), and translateTiming().

◆ translateAtomic()

Fault gem5::X86ISA::TLB::translateAtomic	(	const RequestPtr &	req,
		ThreadContext *	tc,
		BaseMMU::Mode	mode )

overridevirtual

Implements gem5::BaseTLB.

Definition at line 508 of file tlb.cc.

References gem5::X86ISA::mode, gem5::BaseMMU::Read, and translate().

◆ translateFunctional()

Fault gem5::X86ISA::TLB::translateFunctional	(	const RequestPtr &	req,
		ThreadContext *	tc,
		BaseMMU::Mode	mode )

overridevirtual

Reimplemented from gem5::BaseTLB.

Definition at line 238 of file tlb.cc.

References gem5::FullSystem, gem5::ThreadContext::getProcessPtr(), panic_if, gem5::Process::pTable, and gem5::EmulationPageTable::translate().

◆ translateInt()

Fault gem5::X86ISA::TLB::translateInt	(	bool	read,
		RequestPtr	req,
		ThreadContext *	tc )

protected

◆ translateTiming()

void gem5::X86ISA::TLB::translateTiming	(	const RequestPtr &	req,
		ThreadContext *	tc,
		BaseMMU::Translation *	translation,
		BaseMMU::Mode	mode )

overridevirtual

Implements gem5::BaseTLB.

Definition at line 557 of file tlb.cc.

References gem5::BaseMMU::Translation::finish(), gem5::BaseMMU::Translation::markDelayed(), gem5::X86ISA::mode, gem5::BaseMMU::Read, and translate().

◆ unserialize()

void gem5::X86ISA::TLB::unserialize ( CheckpointIn & cp )

overridevirtual

Unserialize an object.

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

Parameters

cp	Checkpoint state

Reimplemented from gem5::SimObject.

Definition at line 207 of file tlb.cc.

References gem5::csprintf(), gem5::ArmISA::i, and UNSERIALIZE_SCALAR.

Friends And Related Symbol Documentation

◆ Walker

friend class Walker

friend

Definition at line 63 of file tlb.hh.

Member Data Documentation

◆ configAddress

uint32_t gem5::X86ISA::TLB::configAddress

protected

Definition at line 67 of file tlb.hh.

Referenced by setConfigAddress(), and translateInt().

◆ freeList

EntryList gem5::X86ISA::TLB::freeList

protected

Definition at line 105 of file tlb.hh.

Referenced by demapPage(), flushAll(), flushNonGlobal(), insert(), and TLB().

◆ lruSeq

uint64_t gem5::X86ISA::TLB::lruSeq

protected

Definition at line 108 of file tlb.hh.

Referenced by nextSeq().

◆ m5opRange

AddrRange gem5::X86ISA::TLB::m5opRange

protected

Definition at line 110 of file tlb.hh.

Referenced by finalizePhysical().

◆ size

uint32_t gem5::X86ISA::TLB::size

protected

Definition at line 101 of file tlb.hh.

Referenced by flushAll(), flushNonGlobal(), and TLB().

◆ stats

gem5::X86ISA::TLB::TlbStats gem5::X86ISA::TLB::stats

protected

Referenced by translate().

◆ tlb

std::vector<TlbEntry> gem5::X86ISA::TLB::tlb

protected

Definition at line 103 of file tlb.hh.

Referenced by flushAll(), flushNonGlobal(), and TLB().

◆ trie

TlbEntryTrie gem5::X86ISA::TLB::trie

protected

Definition at line 107 of file tlb.hh.

Referenced by demapPage(), flushAll(), flushNonGlobal(), insert(), and lookup().

◆ walker

Walker* gem5::X86ISA::TLB::walker

protected

Definition at line 89 of file tlb.hh.

Referenced by getTableWalkerPort(), TLB(), and translate().

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

arch/x86/tlb.hh
arch/mips/tlb.cc
arch/power/tlb.cc
arch/riscv/tlb.cc
arch/x86/tlb.cc

Classes

Public Types

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Friends

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ EntryList

◆ Params

Constructor & Destructor Documentation

◆ TLB()

Member Function Documentation

◆ concAddrPcid()

◆ demapPage()

◆ evictLRU()

◆ finalizePhysical()

◆ flushAll()

◆ flushNonGlobal()

◆ getTableWalkerPort()

◆ getWalker()

◆ insert()

◆ lookup()

◆ lookupIt()

◆ nextSeq()

◆ serialize()

◆ setConfigAddress()

◆ takeOverFrom()

◆ translate()

◆ translateAtomic()

◆ translateFunctional()

◆ translateInt()

◆ translateTiming()

◆ unserialize()

Friends And Related Symbol Documentation

◆ Walker

Member Data Documentation

◆ configAddress

◆ freeList

◆ lruSeq

◆ m5opRange

◆ size

◆ stats

◆ tlb

◆ trie

◆ walker