#include <tlb.hh>

Inheritance diagram for RiscvISA::TLB:

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 *otlb) 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...

void	regStats () override
	Callback to set stat parameters. 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
virtual Port *	getTableWalkerPort ()
	Get the table walker port if present. More...

void	memInvalidate ()
	Invalidate the contents of memory buffers. More...

Public Member Functions inherited from SimObject
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...

const Params *	params () const

	SimObject (const Params *_params)

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)

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)

	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	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...

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Protected Attributes
size_t	size

std::vector< TlbEntry >	tlb

TlbEntryTrie	trie

EntryList	freeList

uint64_t	lruSeq

Walker *	walker

Stats::Scalar	read_hits

Stats::Scalar	read_misses

Stats::Scalar	read_acv

Stats::Scalar	read_accesses

Stats::Scalar	write_hits

Stats::Scalar	write_misses

Stats::Scalar	write_acv

Stats::Scalar	write_accesses

Stats::Formula	hits

Stats::Formula	misses

Stats::Formula	accesses

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)

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 54 of file tlb.hh.

Member Typedef Documentation

◆ EntryList

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

private

Definition at line 56 of file tlb.hh.

◆ Params

typedef RiscvTLBParams RiscvISA::TLB::Params

Definition at line 80 of file tlb.hh.

Constructor & Destructor Documentation

◆ TLB()

TLB::TLB ( const Params * p )

Definition at line 68 of file tlb.cc.

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

Referenced by regStats().

Member Function Documentation

◆ checkPermissions()

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

Definition at line 216 of file tlb.cc.

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

Referenced by doTranslate(), and takeOverFrom().

◆ createPagefault()

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

Definition at line 250 of file tlb.cc.

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

Referenced by checkPermissions(), and takeOverFrom().

◆ demapPage()

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

overridevirtual

Implements BaseTLB.

Definition at line 166 of file tlb.cc.

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

Referenced by takeOverFrom().

◆ doTranslate()

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

private

Definition at line 271 of file tlb.cc.

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

Referenced by nextSeq(), and translate().

◆ evictLRU()

void TLB::evictLRU ( )

private

Definition at line 87 of file tlb.cc.

References RiscvISA::i, lruSeq, size, and tlb.

Referenced by insert(), and nextSeq().

◆ 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 455 of file tlb.cc.

References NoFault.

Referenced by takeOverFrom().

◆ flushAll()

void TLB::flushAll ( )

overridevirtual

Remove all entries from the TLB.

Implements BaseTLB.

Definition at line 193 of file tlb.cc.

References DPRINTF, RiscvISA::i, size, and tlb.

Referenced by demapPage(), and takeOverFrom().

◆ getMemPriv()

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

Definition at line 318 of file tlb.cc.

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

Referenced by RiscvISA::RemoteGDB::acc(), doTranslate(), takeOverFrom(), translate(), and translateFunctional().

◆ getWalker()

Walker * TLB::getWalker ( )

Definition at line 81 of file tlb.cc.

References walker.

Referenced by RiscvISA::RemoteGDB::acc(), and translateFunctional().

◆ insert()

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

Definition at line 136 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(), and trie.

Referenced by takeOverFrom().

◆ lookup()

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

private

Definition at line 102 of file tlb.cc.

References buildKey(), DPRINTF, Trie< Key, Value >::lookup(), RiscvISA::TlbEntry::lruSeq, nextSeq(), RiscvISA::TlbEntry::paddr, read_accesses, read_hits, read_misses, trie, BaseTLB::Write, write_accesses, write_hits, and write_misses.

Referenced by demapPage(), doTranslate(), insert(), nextSeq(), and translateWithTLB().

◆ nextSeq()

uint64_t RiscvISA::TLB::nextSeq ( )

inlineprivate

Definition at line 115 of file tlb.hh.

References doTranslate(), evictLRU(), lookup(), lruSeq, and translate().

Referenced by insert(), and lookup().

◆ regStats()

void TLB::regStats ( )

overridevirtual

Callback to set stat parameters.

This callback is typically used for complex stats (e.g., distributions) that need parameters in addition to a name and a description. Stat names and descriptions should typically be set from the constructor usingo from the constructor using the ADD_STAT macro.

Reimplemented from Stats::Group.

Definition at line 500 of file tlb.cc.

References accesses, Stats::DataWrap< Derived, InfoProxyType >::desc(), hits, misses, SimObject::name(), Stats::DataWrap< Derived, InfoProxyType >::name(), read_accesses, read_hits, read_misses, Stats::Group::regStats(), TLB(), write_accesses, write_hits, and write_misses.

Referenced by takeOverFrom().

◆ remove()

void TLB::remove ( size_t idx )

private

Definition at line 203 of file tlb.cc.

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

◆ 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 462 of file tlb.cc.

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

Referenced by takeOverFrom().

◆ takeOverFrom()

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

inlineoverridevirtual

Take over from an old tlb context.

Implements BaseTLB.

Definition at line 85 of file tlb.hh.

References RiscvISA::asid, checkPermissions(), createPagefault(), demapPage(), finalizePhysical(), flushAll(), getMemPriv(), insert(), RiscvISA::mode, regStats(), serialize(), ArmISA::status, translateAtomic(), translateFunctional(), translateTiming(), translateWithTLB(), unserialize(), and RiscvISA::vaddr.

◆ 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 328 of file tlb.cc.

References bits(), doTranslate(), FullSystem, getMemPriv(), ThreadContext::getProcessPtr(), RiscvISA::INST_ACCESS, RiscvISA::LOAD_ACCESS, RiscvISA::MISCREG_SATP, NoFault, RiscvISA::p, Request::PHYSICAL, RiscvISA::PRV_M, Process::pTable, BaseTLB::Read, ThreadContext::readMiscReg(), RiscvISA::STORE_ACCESS, EmulationPageTable::translate(), and BaseTLB::Write.

Referenced by nextSeq(), translateAtomic(), and translateTiming().

◆ translateAtomic()

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

overridevirtual

Implements BaseTLB.

Definition at line 388 of file tlb.cc.

References translate().

Referenced by takeOverFrom().

◆ translateFunctional()

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

overridevirtual

Reimplemented from BaseTLB.

Definition at line 408 of file tlb.cc.

References DPRINTF, BaseTLB::Execute, Process::fixupFault(), FullSystem, ThreadContext::getDTBPtr(), getMemPriv(), ThreadContext::getProcessPtr(), getWalker(), EmulationPageTable::lookup(), RiscvISA::mask, RiscvISA::MISCREG_SATP, NoFault, EmulationPageTable::Entry::paddr, EmulationPageTable::pageOffset(), RiscvISA::PRV_M, Process::pTable, ThreadContext::readMiscReg(), RiscvISA::Walker::startFunctional(), tlb, RiscvISA::vaddr, and walker.

Referenced by takeOverFrom().

◆ translateTiming()

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

overridevirtual

Implements BaseTLB.

Definition at line 395 of file tlb.cc.

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

Referenced by takeOverFrom().

◆ translateWithTLB()

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

Definition at line 263 of file tlb.cc.

References ArmISA::e, RiscvISA::TlbEntry::logBytes, lookup(), RiscvISA::mask, RiscvISA::TlbEntry::paddr, and RiscvISA::PageShift.

Referenced by takeOverFrom().

◆ 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 477 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.

Referenced by takeOverFrom().

Member Data Documentation

◆ accesses

Stats::Formula RiscvISA::TLB::accesses

protected

Definition at line 77 of file tlb.hh.

Referenced by regStats().

◆ freeList

EntryList RiscvISA::TLB::freeList

protected

Definition at line 62 of file tlb.hh.

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

◆ hits

Stats::Formula RiscvISA::TLB::hits

protected

Definition at line 75 of file tlb.hh.

Referenced by regStats().

◆ lruSeq

uint64_t RiscvISA::TLB::lruSeq

protected

Definition at line 63 of file tlb.hh.

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

◆ misses

Stats::Formula RiscvISA::TLB::misses

protected

Definition at line 76 of file tlb.hh.

Referenced by regStats().

◆ read_accesses

Stats::Scalar RiscvISA::TLB::read_accesses

mutableprotected

Definition at line 70 of file tlb.hh.

Referenced by lookup(), and regStats().

◆ read_acv

Stats::Scalar RiscvISA::TLB::read_acv

mutableprotected

Definition at line 69 of file tlb.hh.

◆ read_hits

Stats::Scalar RiscvISA::TLB::read_hits

mutableprotected

Definition at line 67 of file tlb.hh.

Referenced by lookup(), and regStats().

◆ read_misses

Stats::Scalar RiscvISA::TLB::read_misses

mutableprotected

Definition at line 68 of file tlb.hh.

Referenced by lookup(), and regStats().

◆ size

size_t RiscvISA::TLB::size

protected

Definition at line 59 of file tlb.hh.

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

◆ tlb

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

protected

Definition at line 60 of file tlb.hh.

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

◆ trie

TlbEntryTrie RiscvISA::TLB::trie

protected

Definition at line 61 of file tlb.hh.

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

◆ walker

Walker* RiscvISA::TLB::walker

protected

Definition at line 65 of file tlb.hh.

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

◆ write_accesses

Stats::Scalar RiscvISA::TLB::write_accesses

mutableprotected

Definition at line 74 of file tlb.hh.

Referenced by lookup(), and regStats().

◆ write_acv

Stats::Scalar RiscvISA::TLB::write_acv

mutableprotected

Definition at line 73 of file tlb.hh.

◆ write_hits

Stats::Scalar RiscvISA::TLB::write_hits

mutableprotected

Definition at line 71 of file tlb.hh.

Referenced by lookup(), and regStats().

◆ write_misses

Stats::Scalar RiscvISA::TLB::write_misses

mutableprotected

Definition at line 72 of file tlb.hh.

Referenced by lookup(), and regStats().

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

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

Public Types

Public Member Functions

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()

◆ getWalker()

◆ insert()

◆ lookup()

◆ nextSeq()

◆ regStats()

◆ remove()

◆ serialize()

◆ takeOverFrom()

◆ translate()

◆ translateAtomic()

◆ translateFunctional()

◆ translateTiming()

◆ translateWithTLB()

◆ unserialize()

Member Data Documentation

◆ accesses

◆ freeList

◆ hits

◆ lruSeq

◆ misses

◆ read_accesses

◆ read_acv

◆ read_hits

◆ read_misses

◆ size

◆ tlb

◆ trie

◆ walker

◆ write_accesses

◆ write_acv

◆ write_hits

◆ write_misses