#include <tlb.hh>

Inheritance diagram for RiscvISA::TLB:

Classes
struct	TlbStats

Public Types
typedef RiscvTLBParams	Params

Public Types inherited from BaseTLB
enum	Mode { Read, Write, Execute }

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	TLB (const Params &p)

Walker *	getWalker ()

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

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

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

void	demapPage (Addr vaddr, uint64_t asn) override

Fault	checkPermissions (STATUS status, PrivilegeMode pmode, Addr vaddr, Mode mode, PTESv39 pte)

Fault	createPagefault (Addr vaddr, Mode mode)

PrivilegeMode	getMemPriv (ThreadContext *tc, Mode mode)

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

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

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

Addr	translateWithTLB (Addr vaddr, uint16_t asid, Mode mode)

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

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

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

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

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

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

	SimObject (const Params &p)

virtual	~SimObject ()

virtual const std::string	name () const

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

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

virtual void	initState ()
	initState() is called on each SimObject when not 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...

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...

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

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Attributes
PMAChecker *	pma

Protected Attributes
size_t	size

std::vector< TlbEntry >	tlb

TlbEntryTrie	trie

EntryList	freeList

uint64_t	lruSeq

Walker *	walker

RiscvISA::TLB::TlbStats	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...

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

Private Member Functions
uint64_t	nextSeq ()

TlbEntry *	lookup (Addr vpn, uint16_t asid, Mode mode, bool hidden)

void	evictLRU ()

void	remove (size_t idx)

Fault	translate (const RequestPtr &req, ThreadContext tc, Translation translation, Mode mode, bool &delayed)

Fault	doTranslate (const RequestPtr &req, ThreadContext tc, Translation translation, Mode mode, bool &delayed)

Additional Inherited Members
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 BaseTLB
	BaseTLB (const Params &p)

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...

Detailed Description

Definition at line 56 of file tlb.hh.

Member Typedef Documentation

◆ EntryList

typedef std::list<TlbEntry *> RiscvISA::TLB::EntryList

private

Definition at line 58 of file tlb.hh.

◆ Params

typedef RiscvTLBParams RiscvISA::TLB::Params

Definition at line 90 of file tlb.hh.

Constructor & Destructor Documentation

◆ TLB()

TLB::TLB ( const Params & p )

Definition at line 69 of file tlb.cc.

References freeList, RiscvISA::p, RiscvISA::Walker::setTLB(), size, tlb, walker, and RiscvISA::x.

Member Function Documentation

◆ checkPermissions()

Fault TLB::checkPermissions	(	STATUS	status,
		PrivilegeMode	pmode,
		Addr	vaddr,
		Mode	mode,
		PTESv39	pte
	)

Definition at line 218 of file tlb.cc.

References createPagefault(), DPRINTF, BaseTLB::Execute, RiscvISA::mode, NoFault, RiscvISA::PRV_S, RiscvISA::PRV_U, BaseTLB::Read, ArmISA::status, RiscvISA::vaddr, and BaseTLB::Write.

Referenced by doTranslate().

◆ createPagefault()

Fault TLB::createPagefault	(	Addr	vaddr,
		Mode	mode
	)

Definition at line 252 of file tlb.cc.

References RiscvISA::INST_PAGE, RiscvISA::LOAD_PAGE, RiscvISA::mode, BaseTLB::Read, RiscvISA::STORE_PAGE, RiscvISA::vaddr, and BaseTLB::Write.

Referenced by checkPermissions().

◆ demapPage()

void TLB::demapPage	(	Addr	vaddr,
		uint64_t	asn
	)

overridevirtual

Implements BaseTLB.

Definition at line 168 of file tlb.cc.

References RiscvISA::asid, DPRINTF, flushAll(), RiscvISA::i, lookup(), RiscvISA::mask, remove(), size, tlb, and RiscvISA::vaddr.

◆ doTranslate()

Fault TLB::doTranslate	(	const RequestPtr &	req,
		ThreadContext *	tc,
		Translation *	translation,
		Mode	mode,
		bool &	delayed
	)

private

Definition at line 273 of file tlb.cc.

References checkPermissions(), DPRINTF, ArmISA::e, getMemPriv(), lookup(), RiscvISA::mask, RiscvISA::MISCREG_SATP, RiscvISA::MISCREG_STATUS, RiscvISA::mode, NoFault, RiscvISA::PageShift, ThreadContext::readMiscReg(), RiscvISA::Walker::start(), ArmISA::status, RiscvISA::vaddr, RiscvISA::VADDR_BITS, walker, and BaseTLB::Write.

Referenced by translate().

◆ evictLRU()

void TLB::evictLRU ( )

private

Definition at line 89 of file tlb.cc.

References RiscvISA::i, lruSeq, remove(), size, and tlb.

Referenced by insert().

◆ finalizePhysical()

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

overridevirtual

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.

Implements BaseTLB.

Definition at line 461 of file tlb.cc.

References NoFault.

◆ flushAll()

void TLB::flushAll ( )

overridevirtual

Remove all entries from the TLB.

Implements BaseTLB.

Definition at line 195 of file tlb.cc.

References DPRINTF, RiscvISA::i, remove(), size, and tlb.

Referenced by demapPage().

◆ getMemPriv()

PrivilegeMode TLB::getMemPriv	(	ThreadContext *	tc,
		Mode	mode
	)

Definition at line 320 of file tlb.cc.

References RiscvISA::MISCREG_PRV, RiscvISA::MISCREG_STATUS, RiscvISA::mode, ThreadContext::readMiscReg(), and ArmISA::status.

Referenced by doTranslate(), and translate().

◆ getTableWalkerPort()

Port * 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 RISC-V this method will always return a valid port pointer.

Returns: A pointer to the walker port

Reimplemented from BaseTLB.

Definition at line 523 of file tlb.cc.

References RiscvISA::Walker::getPort(), and walker.

◆ getWalker()

Walker * TLB::getWalker ( )

Definition at line 83 of file tlb.cc.

References walker.

◆ insert()

TlbEntry * TLB::insert	(	Addr	vpn,
		const TlbEntry &	entry
	)

Definition at line 138 of file tlb.cc.

References RiscvISA::TlbEntry::asid, buildKey(), DPRINTF, evictLRU(), freeList, Trie< Key, Value >::insert(), RiscvISA::TlbEntry::logBytes, lookup(), RiscvISA::TlbEntry::lruSeq, Trie< Addr, TlbEntry >::MaxBits, nextSeq(), RiscvISA::TlbEntry::paddr, RiscvISA::TlbEntry::pte, RiscvISA::TlbEntry::size(), trie, RiscvISA::TlbEntry::trieHandle, and RiscvISA::TlbEntry::vaddr.

◆ lookup()

TlbEntry * TLB::lookup	(	Addr	vpn,
		uint16_t	asid,
		Mode	mode,
		bool	hidden
	)

private

◆ nextSeq()

uint64_t RiscvISA::TLB::nextSeq ( )

inlineprivate

Definition at line 135 of file tlb.hh.

References lruSeq.

Referenced by insert(), and lookup().

◆ remove()

void TLB::remove ( size_t idx )

private

Definition at line 205 of file tlb.cc.

References RiscvISA::asid, DPRINTF, freeList, Trie< Key, Value >::remove(), size, tlb, trie, and RiscvISA::vaddr.

Referenced by demapPage(), evictLRU(), and flushAll().

◆ serialize()

void TLB::serialize ( CheckpointOut & cp ) const

overridevirtual

Serialize an object.

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

Parameters

cp	Checkpoint state

Implements Serializable.

Definition at line 468 of file tlb.cc.

References csprintf(), freeList, lruSeq, SERIALIZE_SCALAR, size, tlb, and RiscvISA::x.

◆ takeOverFrom()

void RiscvISA::TLB::takeOverFrom ( BaseTLB * otlb )

inlineoverridevirtual

Take over from an old tlb context.

Implements BaseTLB.

Definition at line 95 of file tlb.hh.

◆ translate()

Fault TLB::translate	(	const RequestPtr &	req,
		ThreadContext *	tc,
		Translation *	translation,
		Mode	mode,
		bool &	delayed
	)

private

we simply set the virtual address to physical address

Definition at line 330 of file tlb.cc.

References bits(), PMAChecker::check(), doTranslate(), FullSystem, getMemPriv(), ThreadContext::getProcessPtr(), RiscvISA::INST_ACCESS, RiscvISA::LOAD_ACCESS, RiscvISA::MISCREG_SATP, RiscvISA::mode, NoFault, RiscvISA::p, Request::PHYSICAL, pma, RiscvISA::PRV_M, BaseTLB::Read, ThreadContext::readMiscReg(), RiscvISA::STORE_ACCESS, and BaseTLB::Write.

Referenced by translateAtomic(), and translateTiming().

◆ translateAtomic()

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

overridevirtual

Implements BaseTLB.

Definition at line 394 of file tlb.cc.

References RiscvISA::mode, and translate().

◆ translateFunctional()

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

overridevirtual

Reimplemented from BaseTLB.

Definition at line 414 of file tlb.cc.

References DPRINTF, BaseTLB::Execute, Process::fixupFault(), FullSystem, RiscvISA::MMU::getDataWalker(), RiscvISA::MMU::getMemPriv(), ThreadContext::getMMUPtr(), ThreadContext::getProcessPtr(), EmulationPageTable::lookup(), RiscvISA::mask, RiscvISA::MISCREG_SATP, RiscvISA::mode, NoFault, EmulationPageTable::pageOffset(), RiscvISA::PRV_M, Process::pTable, ThreadContext::readMiscReg(), RiscvISA::Walker::startFunctional(), RiscvISA::vaddr, and walker.

◆ translateTiming()

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

overridevirtual

Implements BaseTLB.

Definition at line 401 of file tlb.cc.

References BaseTLB::Translation::finish(), BaseTLB::Translation::markDelayed(), RiscvISA::mode, and translate().

◆ translateWithTLB()

Addr TLB::translateWithTLB	(	Addr	vaddr,
		uint16_t	asid,
		Mode	mode
	)

Definition at line 265 of file tlb.cc.

References RiscvISA::asid, ArmISA::e, lookup(), RiscvISA::mask, RiscvISA::mode, RiscvISA::PageShift, and RiscvISA::vaddr.

◆ unserialize()

void TLB::unserialize ( CheckpointIn & cp )

overridevirtual

Unserialize an object.

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

Parameters

cp	Checkpoint state

Implements Serializable.

Definition at line 483 of file tlb.cc.

References RiscvISA::TlbEntry::asid, buildKey(), csprintf(), fatal, freeList, Trie< Key, Value >::insert(), RiscvISA::TlbEntry::logBytes, lruSeq, Trie< Addr, TlbEntry >::MaxBits, size, trie, RiscvISA::TlbEntry::trieHandle, UNSERIALIZE_SCALAR, Serializable::unserializeSection(), RiscvISA::TlbEntry::vaddr, and RiscvISA::x.

Member Data Documentation

◆ freeList

EntryList RiscvISA::TLB::freeList

protected

Definition at line 64 of file tlb.hh.

Referenced by insert(), remove(), serialize(), TLB(), and unserialize().

◆ lruSeq

uint64_t RiscvISA::TLB::lruSeq

protected

Definition at line 65 of file tlb.hh.

Referenced by evictLRU(), nextSeq(), serialize(), and unserialize().

◆ pma

PMAChecker* RiscvISA::TLB::pma

Definition at line 87 of file tlb.hh.

Referenced by translate().

◆ size

size_t RiscvISA::TLB::size

protected

Definition at line 61 of file tlb.hh.

Referenced by demapPage(), evictLRU(), flushAll(), remove(), serialize(), TLB(), and unserialize().

◆ stats

RiscvISA::TLB::TlbStats RiscvISA::TLB::stats

protected

Referenced by lookup().

◆ tlb

std::vector<TlbEntry> RiscvISA::TLB::tlb

protected

Definition at line 62 of file tlb.hh.

Referenced by demapPage(), evictLRU(), flushAll(), remove(), serialize(), and TLB().

◆ trie

TlbEntryTrie RiscvISA::TLB::trie

protected

Definition at line 63 of file tlb.hh.

Referenced by insert(), lookup(), remove(), and unserialize().

◆ walker

Walker* RiscvISA::TLB::walker

protected

Definition at line 67 of file tlb.hh.

Referenced by doTranslate(), getTableWalkerPort(), getWalker(), TLB(), and translateFunctional().

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

arch/riscv/tlb.hh
arch/riscv/tlb.cc

Classes

Public Types

Public Member Functions

Public Attributes

Protected Attributes

Private Types

Private Member Functions

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ EntryList

◆ Params

Constructor & Destructor Documentation

◆ TLB()

Member Function Documentation

◆ checkPermissions()

◆ createPagefault()

◆ demapPage()

◆ doTranslate()

◆ evictLRU()

◆ finalizePhysical()

◆ flushAll()

◆ getMemPriv()

◆ getTableWalkerPort()

◆ getWalker()

◆ insert()

◆ lookup()

◆ nextSeq()

◆ remove()

◆ serialize()

◆ takeOverFrom()

◆ translate()

◆ translateAtomic()

◆ translateFunctional()

◆ translateTiming()

◆ translateWithTLB()

◆ unserialize()

Member Data Documentation

◆ freeList

◆ lruSeq

◆ pma

◆ size

◆ stats

◆ tlb

◆ trie

◆ walker