#include <table_walker.hh>

Inheritance diagram for gem5::ArmISA::TableWalker:

Classes
class	DescriptorBase

class	L1Descriptor

class	L2Descriptor
	Level 2 page table descriptor. More...

class	LongDescriptor
	Long-descriptor format (LPAE) More...

class	Port

class	Stage2Walk
	This translation class is used to trigger the data fetch once a timing translation returns the translated physical address. More...

class	TableWalkerState

struct	TableWalkerStats
	Statistics. More...

class	WalkerState

Public Member Functions
Fault	readDataUntimed (ThreadContext tc, Addr vaddr, Addr desc_addr, uint8_t data, int num_bytes, Request::Flags flags, BaseMMU::Mode mode, MMU::ArmTranslationType tran_type, bool functional)

void	readDataTimed (ThreadContext tc, Addr desc_addr, Stage2Walk translation, int num_bytes, Request::Flags flags)

	PARAMS (ArmTableWalker)

	TableWalker (const Params &p)

virtual	~TableWalker ()

bool	haveLargeAsid64 () const

uint8_t	physAddrRange () const

void	completeDrain ()
	Checks if all state is cleared and if so, completes drain.

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

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

gem5::Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID) override
	Get a port with a given name and index.

Port &	getTableWalkerPort ()

Fault	walk (const RequestPtr &req, ThreadContext tc, uint16_t asid, vmid_t _vmid, BaseMMU::Mode mode, BaseMMU::Translation _trans, bool timing, bool functional, SecurityState ss, PASpace ipaspace, MMU::ArmTranslationType tran_type, bool stage2, const TlbEntry *walk_entry)

void	setMmu (MMU *_mmu)

void	setTlb (TLB *_tlb)

TLB *	getTlb ()

void	memAttrs (ThreadContext *tc, TlbEntry &te, SCTLR sctlr, uint8_t texcb, bool s)

void	memAttrsLPAE (ThreadContext *tc, TlbEntry &te, LongDescriptor &lDescriptor)

void	memAttrsAArch64 (ThreadContext *tc, TlbEntry &te, LongDescriptor &lDescriptor)

void	memAttrsWalkAArch64 (TlbEntry &te)

bool	uncacheableFromAttrs (uint8_t attrs)

void	setTestInterface (TlbTestInterface *ti)

Fault	testWalk (const RequestPtr &walk_req, DomainType domain, LookupLevel lookup_level)

Public Member Functions inherited from gem5::ClockedObject
	ClockedObject (const ClockedObjectParams &p)

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

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

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

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

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

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 (std::string_view name_)

virtual	~Named ()=default

virtual std::string	name () const

Public Member Functions inherited from gem5::Clocked
void	updateClockPeriod ()
	Update the tick to the current tick.

Tick	clockEdge (Cycles cycles=Cycles(0)) const
	Determine the tick when a cycle begins, by default the current one, but the argument also enables the caller to determine a future cycle.

Cycles	curCycle () const
	Determine the current cycle, corresponding to a tick aligned to a clock edge.

Tick	nextCycle () const
	Based on the clock of the object, determine the start tick of the first cycle that is at least one cycle in the future.

uint64_t	frequency () const

Tick	clockPeriod () const

double	voltage () const

Cycles	ticksToCycles (Tick t) const

Tick	cyclesToTicks (Cycles c) const

Static Public Member Functions
static LookupLevel	toLookupLevel (uint8_t lookup_level_as_int)

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.

Public Attributes
TlbTestInterface *	test

Public Attributes inherited from gem5::ClockedObject
PowerState *	powerState

Protected Attributes
std::list< WalkerState * >	stateQueues [LookupLevel::Num_ArmLookupLevel]
	Queues of requests for all the different lookup levels.

std::list< WalkerState * >	pendingQueue
	Queue of requests that have passed are waiting because the walker is currently busy.

MMU *	mmu
	The MMU to forward second stage look upts to.

RequestorID	requestorId
	Requestor id assigned by the MMU.

Port *	port
	Port shared by the two table walkers.

const bool	isStage2
	Indicates whether this table walker is part of the stage 2 mmu.

TLB *	tlb
	TLB that is initiating these table walks.

SCTLR	sctlr
	Cached copy of the sctlr as it existed when translation began.

WalkerState *	currState

bool	pending
	If a timing translation is currently in progress.

unsigned	numSquashable
	The number of walks belonging to squashed instructions that can be removed from the pendingQueue per cycle.

const ArmRelease *	release
	Cached copies of system-level properties.

uint8_t	_physAddrRange

bool	_haveLargeAsid64

gem5::ArmISA::TableWalker::TableWalkerStats	stats

unsigned	pendingReqs

Tick	pendingChangeTick

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.

Static Protected Attributes
static const unsigned	REQUESTED = 0

static const unsigned	COMPLETED = 1

Private Types
using	LookupLevel = enums::ArmLookupLevel

Private Member Functions
void	doL1Descriptor ()

void	doL1DescriptorWrapper ()

void	doL2Descriptor ()

void	doL2DescriptorWrapper ()

void	doLongDescriptor ()

void	doL0LongDescriptorWrapper ()

void	doL1LongDescriptorWrapper ()

void	doL2LongDescriptorWrapper ()

void	doL3LongDescriptorWrapper ()

void	doLongDescriptorWrapper (LookupLevel curr_lookup_level)

void	fetchDescriptor (Addr desc_addr, DescriptorBase &descriptor, int num_bytes, Request::Flags flags, LookupLevel lookup_lvl, Event event, void(TableWalker::doDescriptor)())

Fault	generateLongDescFault (ArmFault::FaultSource src)

void	insertTableEntry (DescriptorBase &descriptor, bool longDescriptor)

void	insertPartialTableEntry (LongDescriptor &descriptor)

std::tuple< Addr, Addr, LookupLevel >	walkAddresses (Addr ttbr, GrainSize tg, int tsz, int pa_range)
	Returns a tuple made of: 1) The address of the first page table 2) The address of the first descriptor within the table 3) The page table level.

Fault	processWalk ()

Fault	processWalkLPAE ()

Addr	maxTxSz (GrainSize tg) const

Addr	s1MinTxSz (GrainSize tg) const

bool	s1TxSzFault (GrainSize tg, int tsz) const

bool	checkVAOutOfRange (Addr addr, int top_bit, int tsz, bool low_range)

bool	checkAddrSizeFaultAArch64 (Addr addr, int pa_range)
	Returns true if the address exceeds the range permitted by the system-wide setting or by the TCR_ELx IPS/PS setting.

bool	uncacheableWalk () const
	Returns true if the table walk should be uncacheable.

Fault	processWalkAArch64 ()

void	processWalkWrapper ()

void	nextWalk (ThreadContext *tc)

void	pendingChange ()

void	stashCurrState (int queue_idx)
	Timing mode: saves the currState into the stateQueues.

void	mpamTagTableWalk (RequestPtr &req) const

Static Private Member Functions
static uint8_t	pageSizeNtoStatBin (uint8_t N)

Private Attributes
EventFunctionWrapper	doL1DescEvent

EventFunctionWrapper	doL2DescEvent

EventFunctionWrapper	doL0LongDescEvent

EventFunctionWrapper	doL1LongDescEvent

EventFunctionWrapper	doL2LongDescEvent

EventFunctionWrapper	doL3LongDescEvent

Event *	LongDescEventByLevel [4]

EventFunctionWrapper	doProcessEvent

Additional Inherited Members
Public Types inherited from gem5::ClockedObject
using	Params = ClockedObjectParams
	Parameters of ClockedObject.

Public Types inherited from gem5::SimObject
typedef SimObjectParams	Params

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

virtual	~Drainable ()

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

Protected Member Functions inherited from gem5::Clocked
	Clocked (ClockDomain &clk_domain)
	Create a clocked object and set the clock domain based on the parameters.

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance.

void	resetClock () const
	Reset the object's clock using the current global tick value.

virtual void	clockPeriodUpdated ()
	A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed.

Detailed Description

Definition at line 66 of file table_walker.hh.

Member Typedef Documentation

◆ LookupLevel

using gem5::ArmISA::TableWalker::LookupLevel = enums::ArmLookupLevel

private

Definition at line 68 of file table_walker.hh.

Constructor & Destructor Documentation

◆ TableWalker()

gem5::TableWalker::TableWalker ( const Params & p )

Definition at line 63 of file table_walker.cc.

References gem5::ClockedObject::ClockedObject(), currState, gem5::curTick(), doL1DescEvent, doL1DescriptorWrapper(), isStage2, numSquashable, gem5::MipsISA::p, pending, pendingChangeTick, pendingReqs, port, release, requestorId, stats, and tlb.

Referenced by fetchDescriptor(), gem5::ArmISA::TableWalker::Port::Port(), and gem5::ArmISA::TableWalker::Stage2Walk::Stage2Walk().

◆ ~TableWalker()

gem5::TableWalker::~TableWalker ( )

virtual

Definition at line 100 of file table_walker.cc.

Member Function Documentation

◆ checkAddrSizeFaultAArch64()

bool gem5::TableWalker::checkAddrSizeFaultAArch64	(	Addr	addr,
		int	pa_range )

private

Returns true if the address exceeds the range permitted by the system-wide setting or by the TCR_ELx IPS/PS setting.

Definition at line 913 of file table_walker.cc.

References _physAddrRange, gem5::X86ISA::addr, and gem5::bits().

Referenced by doLongDescriptor(), and processWalkAArch64().

◆ checkVAOutOfRange()

bool gem5::TableWalker::checkVAOutOfRange	(	Addr	addr,
		int	top_bit,
		int	tsz,
		bool	low_range )

private

Definition at line 905 of file table_walker.cc.

References gem5::bits(), currState, gem5::ArmISA::mask, and gem5::MipsISA::vaddr.

Referenced by processWalkAArch64().

◆ completeDrain()

void gem5::TableWalker::completeDrain ( )

Checks if all state is cleared and if so, completes drain.

Definition at line 240 of file table_walker.cc.

References DPRINTF, gem5::Draining, gem5::Drainable::drainState(), pendingQueue, gem5::Drainable::signalDrainDone(), and stateQueues.

Referenced by nextWalk().

◆ doL0LongDescriptorWrapper()

void gem5::TableWalker::doL0LongDescriptorWrapper ( )

private

Definition at line 2098 of file table_walker.cc.

References doLongDescriptorWrapper().

◆ doL1Descriptor()

void gem5::TableWalker::doL1Descriptor ( )

private

Todo: : check sctlr.ha (bit[17]) if Hardware Access Flag is enabled if set, do l1.Desc.setAp0() instead of generating AccessFlag0

Definition at line 1666 of file table_walker.cc.

References gem5::ArmISA::ArmFault::AccessFlagLL, gem5::bits(), gem5::ArmISA::byteOrder(), currState, doL2DescEvent, doL2Descriptor(), DPRINTF, fetchDescriptor(), gem5::htog(), gem5::ArmISA::TableWalker::L1Descriptor::Ignore, insertTableEntry(), isStage2, gem5::ArmISA::NoAccess, gem5::NoFault, gem5::ArmISA::TableWalker::L1Descriptor::PageTable, panic, gem5::Request::PT_WALK, gem5::ArmISA::TableWalker::L1Descriptor::Reserved, gem5::ArmISA::TableWalker::L1Descriptor::Section, gem5::Request::SECURE, gem5::ArmISA::Secure, gem5::Flags< T >::set(), gem5::ArmISA::te, gem5::ArmISA::ArmFault::TranslationLL, gem5::Request::UNCACHEABLE, and gem5::ArmISA::VmsaTran.

Referenced by doL1DescriptorWrapper(), and processWalk().

◆ doL1DescriptorWrapper()

void gem5::TableWalker::doL1DescriptorWrapper ( )

private

Definition at line 1992 of file table_walker.cc.

References currState, gem5::curTick(), doL1Descriptor(), DPRINTF, isStage2, mmu, nextWalk(), gem5::NoFault, pending, stashCurrState(), stateQueues, and stats.

Referenced by TableWalker().

◆ doL1LongDescriptorWrapper()

void gem5::TableWalker::doL1LongDescriptorWrapper ( )

private

Definition at line 2104 of file table_walker.cc.

References doLongDescriptorWrapper().

◆ doL2Descriptor()

void gem5::TableWalker::doL2Descriptor ( )

private

Todo: : check sctlr.ha (bit[17]) if Hardware Access Flag is enabled if set, do l2.Desc.setAp0() instead of generating AccessFlag0

Definition at line 1936 of file table_walker.cc.

References gem5::ArmISA::ArmFault::AccessFlagLL, gem5::bits(), gem5::ArmISA::byteOrder(), currState, DPRINTF, gem5::htog(), insertTableEntry(), isStage2, gem5::ArmISA::NoAccess, gem5::NoFault, gem5::ArmISA::te, gem5::ArmISA::ArmFault::TranslationLL, and gem5::ArmISA::VmsaTran.

Referenced by doL1Descriptor(), and doL2DescriptorWrapper().

◆ doL2DescriptorWrapper()

void gem5::TableWalker::doL2DescriptorWrapper ( )

private

Definition at line 2054 of file table_walker.cc.

References currState, gem5::curTick(), doL2Descriptor(), DPRINTF, isStage2, mmu, nextWalk(), gem5::NoFault, pending, stateQueues, and stats.

◆ doL2LongDescriptorWrapper()

void gem5::TableWalker::doL2LongDescriptorWrapper ( )

private

Definition at line 2110 of file table_walker.cc.

References doLongDescriptorWrapper().

◆ doL3LongDescriptorWrapper()

void gem5::TableWalker::doL3LongDescriptorWrapper ( )

private

Definition at line 2116 of file table_walker.cc.

References doLongDescriptorWrapper().

◆ doLongDescriptor()

void gem5::TableWalker::doLongDescriptor ( )

private

Definition at line 1779 of file table_walker.cc.

References gem5::ArmISA::ArmFault::AccessFlagLL, gem5::ArmISA::ArmFault::AddressSizeLL, gem5::ArmISA::TableWalker::LongDescriptor::Block, gem5::ArmISA::byteOrder(), checkAddrSizeFaultAArch64(), currState, doLongDescriptor(), DPRINTF, gem5::MipsISA::event, gem5::ArmISA::ArmFault::FaultSourceInvalid, fetchDescriptor(), generateLongDescFault(), gem5::htog(), insertPartialTableEntry(), insertTableEntry(), gem5::ArmISA::TableWalker::LongDescriptor::Invalid, isStage2, gem5::X86ISA::L, LongDescEventByLevel, mmu, gem5::NoFault, gem5::ArmISA::TableWalker::LongDescriptor::Page, panic, gem5::Request::PT_WALK, gem5::Request::SECURE, gem5::Flags< T >::set(), gem5::ArmISA::TableWalker::LongDescriptor::Table, gem5::ArmISA::te, gem5::ArmISA::ArmFault::TranslationLL, and gem5::Request::UNCACHEABLE.

Referenced by doLongDescriptor(), doLongDescriptorWrapper(), processWalkAArch64(), and processWalkLPAE().

◆ doLongDescriptorWrapper()

void gem5::TableWalker::doLongDescriptorWrapper ( LookupLevel curr_lookup_level )

private

Definition at line 2122 of file table_walker.cc.

References currState, gem5::curTick(), doLongDescriptor(), DPRINTF, isStage2, mmu, nextWalk(), gem5::NoFault, panic, pending, stashCurrState(), stateQueues, and stats.

Referenced by doL0LongDescriptorWrapper(), doL1LongDescriptorWrapper(), doL2LongDescriptorWrapper(), and doL3LongDescriptorWrapper().

◆ drain()

DrainState gem5::TableWalker::drain ( )

overridevirtual

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

Reimplemented from gem5::SimObject.

Definition at line 255 of file table_walker.cc.

References DPRINTF, gem5::Drained, gem5::Draining, gem5::ArmISA::i, pendingQueue, and stateQueues.

◆ drainResume()

void gem5::TableWalker::drainResume ( )

overridevirtual

Resume execution after a successful drain.

Reimplemented from gem5::Drainable.

Definition at line 276 of file table_walker.cc.

References currState, gem5::SimObject::params(), and pendingChange().

◆ fetchDescriptor()

void gem5::TableWalker::fetchDescriptor	(	Addr	desc_addr,
		DescriptorBase &	descriptor,
		int	num_bytes,
		Request::Flags	flags,
		LookupLevel	lookup_lvl,
		Event *	event,
		void(TableWalker::*	doDescriptor )() )

private

Definition at line 2190 of file table_walker.cc.

References currState, data, gem5::context_switch_task_id::DMA, gem5::ArmISA::TableWalker::DescriptorBase::domain(), DPRINTF, gem5::MipsISA::event, gem5::ArmISA::TableWalker::DescriptorBase::getRawPtr(), mpamTagTableWalk(), gem5::NoFault, port, readDataTimed(), readDataUntimed(), requestorId, TableWalker(), and testWalk().

Referenced by doL1Descriptor(), doLongDescriptor(), processWalk(), processWalkAArch64(), and processWalkLPAE().

◆ generateLongDescFault()

Fault gem5::TableWalker::generateLongDescFault ( ArmFault::FaultSource src )

private

Definition at line 1759 of file table_walker.cc.

References currState, isStage2, gem5::ArmISA::LpaeTran, and gem5::ArmISA::NoAccess.

Referenced by doLongDescriptor().

◆ getPort()

Port & gem5::TableWalker::getPort	(	const std::string &	if_name,
		PortID	idx = InvalidPortID )

overridevirtual

Get a port with a given name and index.

This is used at binding time and returns a reference to a protocol-agnostic port.

gem5 has a request and response port interface. All memory objects are connected together via ports. These ports provide a rigid interface between these memory objects. These ports implement three different memory system modes: timing, atomic, and functional. The most important mode is the timing mode and here timing mode is used for conducting cycle-level timing experiments. The other modes are only used in special circumstances and should not be used to conduct cycle-level timing experiments. The other modes are only used in special circumstances. These ports allow SimObjects to communicate with each other.

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from gem5::SimObject.

Definition at line 112 of file table_walker.cc.

References gem5::SimObject::getPort(), and port.

Referenced by getTableWalkerPort().

◆ getTableWalkerPort()

TableWalker::Port & gem5::TableWalker::getTableWalkerPort ( )

Definition at line 106 of file table_walker.cc.

References getPort().

◆ getTlb()

TLB * gem5::ArmISA::TableWalker::getTlb ( )

inline

Definition at line 1173 of file table_walker.hh.

References tlb.

◆ haveLargeAsid64()

bool gem5::ArmISA::TableWalker::haveLargeAsid64 ( ) const

inline

Definition at line 1151 of file table_walker.hh.

References _haveLargeAsid64.

◆ insertPartialTableEntry()

void gem5::TableWalker::insertPartialTableEntry ( LongDescriptor & descriptor )

private

Definition at line 2273 of file table_walker.cc.

Referenced by doLongDescriptor().

◆ insertTableEntry()

void gem5::TableWalker::insertTableEntry	(	DescriptorBase &	descriptor,
		bool	longDescriptor )

private

Definition at line 2325 of file table_walker.cc.

Referenced by doL1Descriptor(), doL2Descriptor(), and doLongDescriptor().

◆ maxTxSz()

Addr gem5::TableWalker::maxTxSz ( GrainSize tg ) const

private

Definition at line 876 of file table_walker.cc.

References currState, gem5::ArmISA::Grain16KB, gem5::ArmISA::Grain4KB, gem5::ArmISA::Grain64KB, gem5::ArmISA::HaveExt(), and warn_once.

Referenced by s1TxSzFault().

◆ memAttrs()

void gem5::TableWalker::memAttrs	(	ThreadContext *	tc,
		TlbEntry &	te,
		SCTLR	sctlr,
		uint8_t	texcb,
		bool	s )

Definition at line 1204 of file table_walker.cc.

References gem5::bits(), currState, gem5::ArmISA::TlbEntry::Device, DPRINTF, gem5::ArmISA::MISCREG_NMRR, gem5::ArmISA::MISCREG_PRRR, gem5::ArmISA::NonSecure, gem5::ArmISA::TlbEntry::Normal, panic, gem5::ThreadContext::readMiscReg(), gem5::ArmISA::s, sctlr, gem5::ArmISA::snsBankedIndex(), gem5::ArmISA::TlbEntry::StronglyOrdered, and gem5::ArmISA::te.

Referenced by insertTableEntry().

◆ memAttrsAArch64()

void gem5::TableWalker::memAttrsAArch64	(	ThreadContext *	tc,
		TlbEntry &	te,
		LongDescriptor &	lDescriptor )

◆ memAttrsLPAE()

void gem5::TableWalker::memAttrsLPAE	(	ThreadContext *	tc,
		TlbEntry &	te,
		LongDescriptor &	lDescriptor )

◆ memAttrsWalkAArch64()

void gem5::TableWalker::memAttrsWalkAArch64 ( TlbEntry & te )

Definition at line 1645 of file table_walker.cc.

References currState, gem5::ArmISA::TlbEntry::Normal, gem5::ArmISA::te, and uncacheableWalk().

Referenced by insertPartialTableEntry().

◆ mpamTagTableWalk()

void gem5::TableWalker::mpamTagTableWalk ( RequestPtr & req ) const

private

Definition at line 2522 of file table_walker.cc.

References currState, and gem5::ArmISA::mpam::tagRequest().

Referenced by fetchDescriptor().

◆ nextWalk()

void gem5::TableWalker::nextWalk ( ThreadContext * tc )

private

Definition at line 2181 of file table_walker.cc.

References gem5::Clocked::clockEdge(), completeDrain(), doProcessEvent, pendingQueue, and gem5::EventManager::schedule().

Referenced by doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptorWrapper(), processWalkWrapper(), and walk().

◆ pageSizeNtoStatBin()

uint8_t gem5::TableWalker::pageSizeNtoStatBin ( uint8_t N )

staticprivate

Definition at line 2459 of file table_walker.cc.

References panic.

Referenced by insertTableEntry().

◆ PARAMS()

gem5::ArmISA::TableWalker::PARAMS ( ArmTableWalker )

References gem5::MipsISA::p.

◆ pendingChange()

void gem5::TableWalker::pendingChange ( )

private

Definition at line 2423 of file table_walker.cc.

References currState, gem5::curTick(), gem5::ArmISA::n, pendingChangeTick, pendingQueue, pendingReqs, and stats.

Referenced by drainResume(), processWalkWrapper(), and walk().

◆ physAddrRange()

uint8_t gem5::ArmISA::TableWalker::physAddrRange ( ) const

inline

Definition at line 1152 of file table_walker.hh.

References _physAddrRange.

◆ processWalk()

Fault gem5::TableWalker::processWalk ( )

private

◆ processWalkAArch64()

Fault gem5::TableWalker::processWalkAArch64 ( )

private

Definition at line 920 of file table_walker.cc.

References _physAddrRange, gem5::ArmISA::ArmFault::AddressSizeLL, gem5::bits(), checkAddrSizeFaultAArch64(), checkVAOutOfRange(), gem5::ArmISA::computeAddrTop(), currState, gem5::curTick(), gem5::ArmISA::decodePhysAddrRange64(), doLongDescriptor(), DPRINTF, gem5::ArmISA::EL10, gem5::ArmISA::EL2, gem5::ArmISA::EL20, gem5::ArmISA::EL3, gem5::BaseMMU::Execute, fetchDescriptor(), gem5::ArmISA::Grain4KB, gem5::ArmISA::GrainMap_tg0, gem5::ArmISA::GrainMap_tg1, isStage2, LongDescEventByLevel, gem5::ArmISA::LpaeTran, gem5::ArmISA::MISCREG_TTBR0_EL1, gem5::ArmISA::MISCREG_TTBR0_EL2, gem5::ArmISA::MISCREG_TTBR0_EL3, gem5::ArmISA::MISCREG_TTBR1_EL1, gem5::ArmISA::MISCREG_TTBR1_EL2, gem5::ArmISA::MISCREG_VSTTBR_EL2, gem5::ArmISA::MISCREG_VTTBR_EL2, gem5::ArmISA::NoAccess, gem5::ArmISA::ps, gem5::Request::PT_WALK, gem5::ArmISA::ReservedGrain, s1TxSzFault(), gem5::Request::SECURE, gem5::ArmISA::Secure, gem5::Flags< T >::set(), stats, gem5::ArmISA::ArmFault::TranslationLL, gem5::Request::UNCACHEABLE, uncacheableWalk(), walkAddresses(), and warn_once.

Referenced by processWalkWrapper(), and walk().

◆ processWalkLPAE()

Fault gem5::TableWalker::processWalkLPAE ( )

private

◆ processWalkWrapper()

void gem5::TableWalker::processWalkWrapper ( )

private

Definition at line 502 of file table_walker.cc.

References currState, gem5::curTick(), DPRINTF, gem5::ArmISA::EL2, isStage2, gem5::ArmISA::longDescFormatInUse(), mmu, nextWalk(), gem5::NoFault, numSquashable, pending, pendingChange(), pendingQueue, processWalk(), processWalkAArch64(), processWalkLPAE(), stashCurrState(), stats, and gem5::ArmISA::te.

◆ readDataTimed()

void gem5::TableWalker::readDataTimed	(	ThreadContext *	tc,
		Addr	desc_addr,
		Stage2Walk *	translation,
		int	num_bytes,
		Request::Flags	flags )

Definition at line 2528 of file table_walker.cc.

References gem5::Request::PT_WALK, requestorId, gem5::ArmISA::TableWalker::Stage2Walk::setVirt(), and gem5::ArmISA::TableWalker::Stage2Walk::translateTiming().

Referenced by fetchDescriptor().

◆ readDataUntimed()

Fault gem5::TableWalker::readDataUntimed	(	ThreadContext *	tc,
		Addr	vaddr,
		Addr	desc_addr,
		uint8_t *	data,
		int	num_bytes,
		Request::Flags	flags,
		BaseMMU::Mode	mode,
		MMU::ArmTranslationType	tran_type,
		bool	functional )

Definition at line 2480 of file table_walker.cc.

References gem5::ArmISA::ArmFault::annotate(), data, gem5::Packet::dataStatic(), gem5::Packet::isError(), mmu, gem5::ArmISA::mode, gem5::Request::NO_ACCESS, gem5::NoFault, gem5::ArmISA::ArmFault::OVA, port, gem5::Request::PT_WALK, gem5::BaseMMU::Read, gem5::MemCmd::ReadReq, requestorId, gem5::ArmISA::ArmFault::S1PTW, and gem5::MipsISA::vaddr.

Referenced by fetchDescriptor().

◆ s1MinTxSz()

Addr gem5::TableWalker::s1MinTxSz ( GrainSize tg ) const

private

Definition at line 861 of file table_walker.cc.

References currState, gem5::ArmISA::Grain64KB, and gem5::ArmISA::HaveExt().

Referenced by s1TxSzFault().

◆ s1TxSzFault()

bool gem5::TableWalker::s1TxSzFault	(	GrainSize	tg,
		int	tsz ) const

private

Definition at line 896 of file table_walker.cc.

References maxTxSz(), and s1MinTxSz().

Referenced by processWalkAArch64().

◆ setMmu()

void gem5::TableWalker::setMmu ( MMU * _mmu )

Definition at line 121 of file table_walker.cc.

References mmu, and release.

◆ setTestInterface()

void gem5::TableWalker::setTestInterface ( TlbTestInterface * ti )

Definition at line 2453 of file table_walker.cc.

References test, and gem5::MipsISA::ti.

◆ setTlb()

void gem5::ArmISA::TableWalker::setTlb ( TLB * _tlb )

inline

Definition at line 1172 of file table_walker.hh.

References tlb.

◆ stashCurrState()

void gem5::TableWalker::stashCurrState ( int queue_idx )

private

Timing mode: saves the currState into the stateQueues.

Definition at line 2263 of file table_walker.cc.

References currState, DPRINTF, and stateQueues.

Referenced by doL1DescriptorWrapper(), doLongDescriptorWrapper(), processWalkWrapper(), and walk().

◆ testWalk()

Fault gem5::TableWalker::testWalk	(	const RequestPtr &	walk_req,
		DomainType	domain,
		LookupLevel	lookup_level )

Definition at line 2439 of file table_walker.cc.

References currState, gem5::ArmISA::domain, gem5::ArmISA::EL0, gem5::NoFault, gem5::ArmISA::Secure, and test.

Referenced by fetchDescriptor().

◆ toLookupLevel()

TableWalker::LookupLevel gem5::TableWalker::toLookupLevel ( uint8_t lookup_level_as_int )

static

Definition at line 2406 of file table_walker.cc.

References panic.

◆ uncacheableFromAttrs()

bool gem5::TableWalker::uncacheableFromAttrs ( uint8_t attrs )

Definition at line 1537 of file table_walker.cc.

References gem5::bits().

Referenced by memAttrsAArch64().

◆ uncacheableWalk()

bool gem5::TableWalker::uncacheableWalk ( ) const

private

Returns true if the table walk should be uncacheable.

Definition at line 286 of file table_walker.cc.

References currState, and isStage2.

Referenced by memAttrsWalkAArch64(), processWalk(), processWalkAArch64(), and processWalkLPAE().

◆ walk()

Fault gem5::TableWalker::walk	(	const RequestPtr &	req,
		ThreadContext *	tc,
		uint16_t	asid,
		vmid_t	_vmid,
		BaseMMU::Mode	mode,
		BaseMMU::Translation *	_trans,
		bool	timing,
		bool	functional,
		SecurityState	ss,
		PASpace	ipaspace,
		MMU::ArmTranslationType	tran_type,
		bool	stage2,
		const TlbEntry *	walk_entry )

Todo: These should be cached or grabbed from cached copies in the TLB, all these miscreg reads are expensive

Definition at line 295 of file table_walker.cc.

Referenced by gem5::ArmISA::MMU::getTE().

◆ walkAddresses()

std::tuple< Addr, Addr, TableWalker::LookupLevel > gem5::TableWalker::walkAddresses	(	Addr	ttbr,
		GrainSize	tg,
		int	tsz,
		int	pa_range )

private

Returns a tuple made of: 1) The address of the first page table 2) The address of the first descriptor within the table 3) The page table level.

Definition at line 1154 of file table_walker.cc.

References gem5::ArmISA::TlbEntry::ap, gem5::bits(), currState, DPRINTF, gem5::ArmISA::getPageTableOps(), isStage2, gem5::ArmISA::TlbEntry::lookupLevel, gem5::mbits(), panic_if, gem5::ArmISA::TlbEntry::pfn, gem5::ArmISA::TlbEntry::pxn, gem5::ArmISA::stride, gem5::ArmISA::TlbEntry::xn, and gem5::ArmISA::z.

Referenced by processWalkAArch64().

Member Data Documentation

◆ _haveLargeAsid64

bool gem5::ArmISA::TableWalker::_haveLargeAsid64

protected

Definition at line 1119 of file table_walker.hh.

Referenced by haveLargeAsid64().

◆ _physAddrRange

uint8_t gem5::ArmISA::TableWalker::_physAddrRange

protected

Definition at line 1118 of file table_walker.hh.

Referenced by checkAddrSizeFaultAArch64(), physAddrRange(), processWalkAArch64(), and walk().

◆ COMPLETED

const unsigned gem5::ArmISA::TableWalker::COMPLETED = 1

staticprotected

Definition at line 1144 of file table_walker.hh.

Referenced by insertTableEntry().

◆ currState

WalkerState* gem5::ArmISA::TableWalker::currState

protected

Definition at line 1107 of file table_walker.hh.

◆ doL0LongDescEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doL0LongDescEvent

private

Definition at line 1198 of file table_walker.hh.

◆ doL1DescEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doL1DescEvent

private

Definition at line 1189 of file table_walker.hh.

Referenced by processWalk(), and TableWalker().

◆ doL1LongDescEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doL1LongDescEvent

private

Definition at line 1200 of file table_walker.hh.

◆ doL2DescEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doL2DescEvent

private

Definition at line 1193 of file table_walker.hh.

Referenced by doL1Descriptor().

◆ doL2LongDescEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doL2LongDescEvent

private

Definition at line 1202 of file table_walker.hh.

◆ doL3LongDescEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doL3LongDescEvent

private

Definition at line 1204 of file table_walker.hh.

◆ doProcessEvent

EventFunctionWrapper gem5::ArmISA::TableWalker::doProcessEvent

private

Definition at line 1245 of file table_walker.hh.

Referenced by nextWalk().

◆ isStage2

const bool gem5::ArmISA::TableWalker::isStage2

protected

Indicates whether this table walker is part of the stage 2 mmu.

Definition at line 1099 of file table_walker.hh.

Referenced by doL1Descriptor(), doL1DescriptorWrapper(), doL2Descriptor(), doL2DescriptorWrapper(), doLongDescriptor(), doLongDescriptorWrapper(), generateLongDescFault(), insertTableEntry(), memAttrsAArch64(), memAttrsLPAE(), processWalk(), processWalkAArch64(), processWalkLPAE(), processWalkWrapper(), TableWalker(), uncacheableWalk(), walk(), and walkAddresses().

◆ LongDescEventByLevel

Event* gem5::ArmISA::TableWalker::LongDescEventByLevel[4]

private

Definition at line 1207 of file table_walker.hh.

Referenced by doLongDescriptor(), processWalkAArch64(), and processWalkLPAE().

◆ mmu

MMU* gem5::ArmISA::TableWalker::mmu

protected

The MMU to forward second stage look upts to.

Definition at line 1090 of file table_walker.hh.

Referenced by doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptor(), doLongDescriptorWrapper(), insertPartialTableEntry(), processWalkWrapper(), readDataUntimed(), and setMmu().

◆ numSquashable

unsigned gem5::ArmISA::TableWalker::numSquashable

protected

The number of walks belonging to squashed instructions that can be removed from the pendingQueue per cycle.

Definition at line 1114 of file table_walker.hh.

Referenced by processWalkWrapper(), and TableWalker().

◆ pending

bool gem5::ArmISA::TableWalker::pending

protected

If a timing translation is currently in progress.

Definition at line 1110 of file table_walker.hh.

Referenced by doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptorWrapper(), processWalkWrapper(), TableWalker(), and walk().

◆ pendingChangeTick

Tick gem5::ArmISA::TableWalker::pendingChangeTick

mutableprotected

Definition at line 1141 of file table_walker.hh.

Referenced by pendingChange(), and TableWalker().

◆ pendingQueue

std::list<WalkerState *> gem5::ArmISA::TableWalker::pendingQueue

protected

Queue of requests that have passed are waiting because the walker is currently busy.

Definition at line 1087 of file table_walker.hh.

Referenced by completeDrain(), drain(), nextWalk(), pendingChange(), processWalkWrapper(), and walk().

◆ pendingReqs

unsigned gem5::ArmISA::TableWalker::pendingReqs

mutableprotected

Definition at line 1140 of file table_walker.hh.

Referenced by pendingChange(), and TableWalker().

◆ port

Port* gem5::ArmISA::TableWalker::port

protected

Port shared by the two table walkers.

Definition at line 1096 of file table_walker.hh.

Referenced by fetchDescriptor(), getPort(), readDataUntimed(), and TableWalker().

◆ release

const ArmRelease* gem5::ArmISA::TableWalker::release

protected

Cached copies of system-level properties.

Definition at line 1117 of file table_walker.hh.

Referenced by insertPartialTableEntry(), insertTableEntry(), memAttrsLPAE(), processWalk(), setMmu(), TableWalker(), and walk().

◆ REQUESTED

const unsigned gem5::ArmISA::TableWalker::REQUESTED = 0

staticprotected

Definition at line 1143 of file table_walker.hh.

Referenced by walk().

◆ requestorId

RequestorID gem5::ArmISA::TableWalker::requestorId

protected

Requestor id assigned by the MMU.

Definition at line 1093 of file table_walker.hh.

Referenced by fetchDescriptor(), readDataTimed(), readDataUntimed(), gem5::ArmISA::TableWalker::Stage2Walk::setVirt(), and TableWalker().

◆ sctlr

SCTLR gem5::ArmISA::TableWalker::sctlr

protected

Cached copy of the sctlr as it existed when translation began.

Definition at line 1105 of file table_walker.hh.

Referenced by memAttrs(), and walk().

◆ stateQueues

std::list<WalkerState *> gem5::ArmISA::TableWalker::stateQueues[LookupLevel::Num_ArmLookupLevel]

protected

Queues of requests for all the different lookup levels.

Definition at line 1083 of file table_walker.hh.

Referenced by completeDrain(), doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptorWrapper(), drain(), and stashCurrState().

◆ stats

gem5::ArmISA::TableWalker::TableWalkerStats gem5::ArmISA::TableWalker::stats

protected

Referenced by doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptorWrapper(), insertTableEntry(), pendingChange(), processWalk(), processWalkAArch64(), processWalkLPAE(), processWalkWrapper(), TableWalker(), and walk().

◆ test

TlbTestInterface* gem5::ArmISA::TableWalker::test

Definition at line 1259 of file table_walker.hh.

Referenced by setTestInterface(), and testWalk().

◆ tlb

TLB* gem5::ArmISA::TableWalker::tlb

protected

TLB that is initiating these table walks.

Definition at line 1102 of file table_walker.hh.

Referenced by getTlb(), insertPartialTableEntry(), insertTableEntry(), setTlb(), and TableWalker().

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

arch/arm/table_walker.hh
arch/arm/table_walker.cc

Classes

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Attributes

Static Protected Attributes

Private Types

Private Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ LookupLevel

Constructor & Destructor Documentation

◆ TableWalker()

◆ ~TableWalker()

Member Function Documentation

◆ checkAddrSizeFaultAArch64()

◆ checkVAOutOfRange()

◆ completeDrain()

◆ doL0LongDescriptorWrapper()

◆ doL1Descriptor()

◆ doL1DescriptorWrapper()

◆ doL1LongDescriptorWrapper()

◆ doL2Descriptor()

◆ doL2DescriptorWrapper()

◆ doL2LongDescriptorWrapper()

◆ doL3LongDescriptorWrapper()

◆ doLongDescriptor()

◆ doLongDescriptorWrapper()

◆ drain()

◆ drainResume()

◆ fetchDescriptor()

◆ generateLongDescFault()

◆ getPort()

◆ getTableWalkerPort()

◆ getTlb()

◆ haveLargeAsid64()

◆ insertPartialTableEntry()

◆ insertTableEntry()

◆ maxTxSz()

◆ memAttrs()

◆ memAttrsAArch64()

◆ memAttrsLPAE()

◆ memAttrsWalkAArch64()

◆ mpamTagTableWalk()

◆ nextWalk()

◆ pageSizeNtoStatBin()

◆ PARAMS()

◆ pendingChange()

◆ physAddrRange()

◆ processWalk()

◆ processWalkAArch64()

◆ processWalkLPAE()

◆ processWalkWrapper()

◆ readDataTimed()

◆ readDataUntimed()

◆ s1MinTxSz()

◆ s1TxSzFault()

◆ setMmu()

◆ setTestInterface()

◆ setTlb()

◆ stashCurrState()

◆ testWalk()

◆ toLookupLevel()

◆ uncacheableFromAttrs()

◆ uncacheableWalk()

◆ walk()

◆ walkAddresses()

Member Data Documentation

◆ _haveLargeAsid64

◆ _physAddrRange

◆ COMPLETED

◆ currState

◆ doL0LongDescEvent

◆ doL1DescEvent

◆ doL1LongDescEvent

◆ doL2DescEvent

◆ doL2LongDescEvent