#include <tlb.hh>

Inheritance diagram for gem5::BaseTLB:

Public Member Functions
virtual void	demapPage (Addr vaddr, uint64_t asn)=0

virtual Fault	translateAtomic (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode)=0

virtual void	translateTiming (const RequestPtr &req, ThreadContext tc, BaseMMU::Translation translation, BaseMMU::Mode mode)=0

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

virtual Fault	finalizePhysical (const RequestPtr &req, ThreadContext *tc, BaseMMU::Mode mode) const =0
	Do post-translation physical address finalization.

virtual void	flushAll ()=0
	Remove all entries from the TLB.

virtual void	takeOverFrom (BaseTLB *otlb)=0
	Take over from an old tlb context.

virtual Port *	getTableWalkerPort ()
	Get the table walker port if present.

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.

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

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

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 Member Functions
	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
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.

Additional Inherited Members
Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

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 58 of file tlb.hh.

Constructor & Destructor Documentation

◆ BaseTLB()

gem5::BaseTLB::BaseTLB ( const BaseTLBParams & p )

inlineprotected

Definition at line 61 of file tlb.hh.

Member Function Documentation

◆ demapPage()

virtual void gem5::BaseTLB::demapPage	(	Addr	vaddr,
		uint64_t	asn )

pure virtual

Implemented in gem5::ArmISA::TLB, gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Referenced by gem5::BaseMMU::demapPage().

◆ finalizePhysical()

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

pure virtual

Do post-translation physical address finalization.

This method is used by some architectures that need post-translation massaging of physical addresses. For example, X86 uses this to remap physical addresses in the APIC range to a range of physical memory not normally available to real x86 implementations.

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.

Implemented in gem5::ArmISA::TLB, gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Referenced by gem5::BaseMMU::finalizePhysical().

◆ flushAll()

virtual void gem5::BaseTLB::flushAll ( )

pure virtual

Remove all entries from the TLB.

Implemented in gem5::ArmISA::TLB, gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Referenced by memInvalidate().

◆ getTableWalkerPort()

virtual Port * gem5::BaseTLB::getTableWalkerPort ( )

inlinevirtual

Get the table walker port if present.

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.

Returns: A pointer to the walker port or NULL if not present

Reimplemented in gem5::ArmISA::TLB, gem5::RiscvISA::TLB, and gem5::X86ISA::TLB.

Definition at line 121 of file tlb.hh.

Referenced by gem5::BaseMMU::takeOverFrom().

◆ memInvalidate()

void gem5::BaseTLB::memInvalidate ( )

inlinevirtual

Invalidate the contents of memory buffers.

When the switching to hardware virtualized CPU models, we need to make sure that we don't have any cached state in the system that might become stale when we return. This method is used to flush all such state back to main memory.

@warn This does not cause any dirty state to be written back to memory.

Reimplemented from gem5::SimObject.

Definition at line 123 of file tlb.hh.

References flushAll().

◆ nextLevel()

BaseTLB * gem5::BaseTLB::nextLevel ( ) const

inline

Definition at line 127 of file tlb.hh.

References _nextLevel.

Referenced by gem5::BaseMMU::init(), gem5::ArmISA::TLB::multiInsert(), and gem5::ArmISA::TLB::multiLookup().

◆ takeOverFrom()

virtual void gem5::BaseTLB::takeOverFrom ( BaseTLB * otlb )

pure virtual

Take over from an old tlb context.

Implemented in gem5::ArmISA::TLB, gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Referenced by gem5::BaseMMU::takeOverFrom().

◆ translateAtomic()

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

pure virtual

Implemented in gem5::ArmISA::TLB, gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Referenced by gem5::BaseMMU::translateAtomic().

◆ translateFunctional()

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

inlinevirtual

Reimplemented in gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Definition at line 78 of file tlb.hh.

References panic.

Referenced by gem5::BaseMMU::translateFunctional().

◆ translateTiming()

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

pure virtual

Implemented in gem5::ArmISA::TLB, gem5::Iris::TLB, gem5::MipsISA::TLB, gem5::PowerISA::TLB, gem5::RiscvISA::TLB, gem5::SparcISA::TLB, and gem5::X86ISA::TLB.

Referenced by gem5::BaseMMU::translateTiming().

◆ type()

TypeTLB gem5::BaseTLB::type ( ) const

inline

Definition at line 125 of file tlb.hh.

References _type.

Referenced by gem5::ArmISA::TLB::TlbStats::TlbStats().

Member Data Documentation

◆ _nextLevel

BaseTLB* gem5::BaseTLB::_nextLevel

protected

Definition at line 67 of file tlb.hh.

Referenced by nextLevel().

◆ _type

TypeTLB gem5::BaseTLB::_type

protected

Definition at line 65 of file tlb.hh.

Referenced by type().

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

arch/generic/tlb.hh

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ BaseTLB()

Member Function Documentation

◆ demapPage()

◆ finalizePhysical()

◆ flushAll()

◆ getTableWalkerPort()

◆ memInvalidate()

◆ nextLevel()

◆ takeOverFrom()

◆ translateAtomic()

◆ translateFunctional()

◆ translateTiming()

◆ type()

Member Data Documentation

◆ _nextLevel

◆ _type