#include <table_walker.hh>

Inheritance diagram for ArmISA::TableWalker:

Classes
class	DescriptorBase

class	L1Descriptor

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

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

struct	TableWalkerStats
	Statistics. More...

class	WalkerState

Public Types
enum	GrainSize { Grain4KB = 12, Grain16KB = 14, Grain64KB = 16, ReservedGrain = 0 }

typedef ArmTableWalkerParams	Params

Public Types inherited from ClockedObject
typedef ClockedObjectParams	Params
	Parameters of ClockedObject. More...

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	TableWalker (const Params *p)

virtual	~TableWalker ()

const Params *	params () const

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

bool	haveLPAE () const

bool	haveVirtualization () const

bool	haveLargeAsid64 () const

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

DrainState	drain () override
	Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight. More...

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

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

Fault	walk (const RequestPtr &req, ThreadContext tc, uint16_t asid, uint8_t _vmid, bool _isHyp, TLB::Mode mode, TLB::Translation _trans, bool timing, bool functional, bool secure, TLB::ArmTranslationType tranType, bool _stage2Req)

void	setTlb (TLB *_tlb)

TLB *	getTlb ()

void	setMMU (Stage2MMU *m, RequestorID requestor_id)

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)

Public Member Functions inherited from ClockedObject
	ClockedObject (const ClockedObjectParams *p)

const Params *	params () const

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

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

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

	SimObject (const Params *_params)

virtual	~SimObject ()

virtual const std::string	name () const

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 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...

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

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

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

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. More...

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

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. More...

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

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

Stage2MMU *	stage2Mmu
	The MMU to forward second stage look upts to. More...

DmaPort *	port
	Port shared by the two table walkers. More...

RequestorID	requestorId
	Requestor id assigned by the MMU. More...

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

TLB *	tlb
	TLB that is initiating these table walks. More...

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

WalkerState *	currState

bool	pending
	If a timing translation is currently in progress. More...

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

bool	haveSecurity
	Cached copies of system-level properties. More...

bool	_haveLPAE

bool	_haveVirtualization

uint8_t	physAddrRange

bool	_haveLargeAsid64

ArmISA::TableWalker::TableWalkerStats	stats

unsigned	pendingReqs

Tick	pendingChangeTick

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...

Static Protected Attributes
static const unsigned	REQUESTED = 0

static const unsigned	COMPLETED = 1

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)

bool	fetchDescriptor (Addr descAddr, uint8_t data, int numBytes, Request::Flags flags, int queueIndex, Event event, void(TableWalker::*doDescriptor)())

Fault	generateLongDescFault (ArmFault::FaultSource src)

void	insertTableEntry (DescriptorBase &descriptor, bool longDescriptor)

Fault	processWalk ()

Fault	processWalkLPAE ()

Fault	processWalkAArch64 ()

void	processWalkWrapper ()

void	nextWalk (ThreadContext *tc)

void	pendingChange ()

Fault	testWalk (Addr pa, Addr size, TlbEntry::DomainType domain, LookupLevel lookup_level)

Static Private Member Functions
static unsigned	adjustTableSizeAArch64 (unsigned tsz)

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

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 Attributes inherited from ClockedObject
PowerState *	powerState

Protected Member Functions inherited from Drainable
	Drainable ()

virtual	~Drainable ()

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

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

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance. More...

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

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

Detailed Description

Definition at line 61 of file table_walker.hh.

Member Typedef Documentation

◆ Params

typedef ArmTableWalkerParams ArmISA::TableWalker::Params

Definition at line 884 of file table_walker.hh.

Member Enumeration Documentation

◆ GrainSize

enum ArmISA::TableWalker::GrainSize

Enumerator
Grain4KB
Grain16KB
Grain64KB
ReservedGrain

Definition at line 367 of file table_walker.hh.

Constructor & Destructor Documentation

◆ TableWalker()

TableWalker::TableWalker ( const Params * p )

Definition at line 56 of file table_walker.cc.

References doL1DescriptorWrapper().

◆ ~TableWalker()

TableWalker::~TableWalker ( )

virtual

Definition at line 94 of file table_walker.cc.

Member Function Documentation

◆ adjustTableSizeAArch64()

unsigned TableWalker::adjustTableSizeAArch64 ( unsigned tsz )

staticprivate

Definition at line 750 of file table_walker.cc.

Referenced by processWalkAArch64().

◆ checkAddrSizeFaultAArch64()

bool TableWalker::checkAddrSizeFaultAArch64	(	Addr	addr,
		int	currPhysAddrRange
	)

staticprivate

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 760 of file table_walker.cc.

References addr, bits(), and ArmISA::MaxPhysAddrRange.

Referenced by doLongDescriptor().

◆ completeDrain()

void TableWalker::completeDrain ( )

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

Definition at line 145 of file table_walker.cc.

References DPRINTF, Draining, Drainable::drainState(), ArmISA::L0, ArmISA::L1, ArmISA::L2, ArmISA::L3, pendingQueue, Drainable::signalDrainDone(), and stateQueues.

Referenced by nextWalk().

◆ doL0LongDescriptorWrapper()

void TableWalker::doL0LongDescriptorWrapper ( )

private

Definition at line 1978 of file table_walker.cc.

References doLongDescriptorWrapper(), and ArmISA::L0.

◆ doL1Descriptor()

void 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 1538 of file table_walker.cc.

Referenced by doL1DescriptorWrapper(), and processWalk().

◆ doL1DescriptorWrapper()

void TableWalker::doL1DescriptorWrapper ( )

private

Definition at line 1881 of file table_walker.cc.

Referenced by TableWalker().

◆ doL1LongDescriptorWrapper()

void TableWalker::doL1LongDescriptorWrapper ( )

private

Definition at line 1984 of file table_walker.cc.

References doLongDescriptorWrapper(), and ArmISA::L1.

◆ doL2Descriptor()

void 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 1825 of file table_walker.cc.

Referenced by doL1Descriptor(), and doL2DescriptorWrapper().

◆ doL2DescriptorWrapper()

void TableWalker::doL2DescriptorWrapper ( )

private

◆ doL2LongDescriptorWrapper()

void TableWalker::doL2LongDescriptorWrapper ( )

private

Definition at line 1990 of file table_walker.cc.

References doLongDescriptorWrapper(), and ArmISA::L2.

◆ doL3LongDescriptorWrapper()

void TableWalker::doL3LongDescriptorWrapper ( )

private

Definition at line 1996 of file table_walker.cc.

References doLongDescriptorWrapper(), and ArmISA::L3.

◆ doLongDescriptor()

void TableWalker::doLongDescriptor ( )

private

Definition at line 1663 of file table_walker.cc.

Referenced by doLongDescriptorWrapper(), and processWalkLPAE().

◆ doLongDescriptorWrapper()

void TableWalker::doLongDescriptorWrapper ( LookupLevel curr_lookup_level )

private

Definition at line 2002 of file table_walker.cc.

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

◆ drain()

DrainState TableWalker::drain ( )

overridevirtual

Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight.

Draining is mostly used before forking and creating a check point.

This function notifies an object that it needs to drain its state.

If the object does not need further simulation to drain internal buffers, it returns DrainState::Drained and automatically switches to the Drained state. If the object needs more simulation, it returns DrainState::Draining and automatically enters the Draining state. Other return values are invalid.

Note: An object that has entered the Drained state can be disturbed by other objects in the system and consequently stop being drained. These perturbations are not visible in the drain state. The simulator therefore repeats the draining process until all objects return DrainState::Drained on the first call to drain().

Returns: DrainState::Drained if the object is drained at this point in time, DrainState::Draining if it needs further simulation.

Implements Drainable.

Definition at line 158 of file table_walker.cc.

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

◆ drainResume()

void TableWalker::drainResume ( )

overridevirtual

Resume execution after a successful drain.

Reimplemented from Drainable.

Definition at line 179 of file table_walker.cc.

References currState, params(), and pendingChange().

◆ fetchDescriptor()

bool TableWalker::fetchDescriptor	(	Addr	descAddr,
		uint8_t *	data,
		int	numBytes,
		Request::Flags	flags,
		int	queueIndex,
		Event *	event,
		void(TableWalker::*)()	doDescriptor
	)

private

◆ generateLongDescFault()

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

private

Definition at line 1643 of file table_walker.cc.

References currState, ArmISA::TableWalker::WalkerState::isFetch, isStage2, ArmISA::TableWalker::WalkerState::isWrite, ArmISA::TableWalker::WalkerState::longDesc, ArmISA::TableWalker::DescriptorBase::lookupLevel, ArmISA::ArmFault::LpaeTran, ArmISA::TlbEntry::NoAccess, ArmISA::TableWalker::WalkerState::req, and ArmISA::TableWalker::WalkerState::vaddr_tainted.

Referenced by doLongDescriptor().

◆ getPort()

Port & 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 SimObject.

Definition at line 116 of file table_walker.cc.

References fatal, SimObject::getPort(), isStage2, and port.

◆ getTlb()

TLB* ArmISA::TableWalker::getTlb ( )

inline

Definition at line 914 of file table_walker.hh.

References tlb.

◆ haveLargeAsid64()

bool ArmISA::TableWalker::haveLargeAsid64 ( ) const

inline

Definition at line 898 of file table_walker.hh.

References _haveLargeAsid64.

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

◆ haveLPAE()

bool ArmISA::TableWalker::haveLPAE ( ) const

inline

Definition at line 896 of file table_walker.hh.

References _haveLPAE.

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

◆ haveVirtualization()

bool ArmISA::TableWalker::haveVirtualization ( ) const

inline

Definition at line 897 of file table_walker.hh.

References _haveVirtualization.

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

◆ init()

void TableWalker::init ( )

overridevirtual

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

Initializations that are independent of unserialization but rely on a fully instantiated and connected SimObject graph should be done here.

Reimplemented from SimObject.

Definition at line 108 of file table_walker.cc.

References fatal_if, port, stage2Mmu, and tlb.

◆ insertTableEntry()

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

private

Definition at line 2139 of file table_walker.cc.

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

◆ memAttrs()

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

Definition at line 1105 of file table_walker.cc.

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

Referenced by insertTableEntry().

◆ memAttrsAArch64()

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

◆ memAttrsLPAE()

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

◆ nextWalk()

void TableWalker::nextWalk ( ThreadContext * tc )

private

Definition at line 2058 of file table_walker.cc.

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

Referenced by doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptorWrapper(), processWalk(), processWalkLPAE(), and processWalkWrapper().

◆ pageSizeNtoStatBin()

uint8_t TableWalker::pageSizeNtoStatBin ( uint8_t N )

staticprivate

Definition at line 2262 of file table_walker.cc.

References panic.

Referenced by insertTableEntry().

◆ params()

const Params* ArmISA::TableWalker::params ( ) const

inline

Definition at line 889 of file table_walker.hh.

References SimObject::_params.

Referenced by drainResume().

◆ pendingChange()

void TableWalker::pendingChange ( )

private

Definition at line 2237 of file table_walker.cc.

References currState, curTick(), ArmISA::n, pendingChangeTick, pendingQueue, pendingReqs, ArmISA::TableWalker::TableWalkerStats::pendingWalks, Stats::DistBase< Derived, Stor >::sample(), and stats.

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

◆ processWalk()

Fault TableWalker::processWalk ( )

private

Definition at line 469 of file table_walker.cc.

Referenced by processWalkWrapper(), and walk().

◆ processWalkAArch64()

Fault TableWalker::processWalkAArch64 ( )

private

Definition at line 767 of file table_walker.cc.

Referenced by processWalkWrapper(), and walk().

◆ processWalkLPAE()

Fault TableWalker::processWalkLPAE ( )

private

Definition at line 578 of file table_walker.cc.

Referenced by processWalkWrapper(), and walk().

◆ processWalkWrapper()

void TableWalker::processWalkWrapper ( )

private

Definition at line 378 of file table_walker.cc.

◆ setMMU()

void TableWalker::setMMU	(	Stage2MMU *	m,
		RequestorID	requestor_id
	)

Definition at line 100 of file table_walker.cc.

References ArmISA::m, port, requestorId, and stage2Mmu.

Referenced by ArmISA::TLB::setMMU().

◆ setTlb()

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

inline

Definition at line 913 of file table_walker.hh.

References tlb.

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

◆ testWalk()

Fault TableWalker::testWalk	(	Addr	pa,
		Addr	size,
		TlbEntry::DomainType	domain,
		LookupLevel	lookup_level
	)

private

Definition at line 2253 of file table_walker.cc.

References currState, ArmISA::domain, ArmISA::TableWalker::WalkerState::isSecure, ArmISA::TableWalker::WalkerState::mode, ArmISA::pa, ArmISA::TLB::testWalk(), tlb, and ArmISA::TableWalker::WalkerState::vaddr.

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

◆ toLookupLevel()

LookupLevel TableWalker::toLookupLevel ( uint8_t lookup_level_as_int )

static

Definition at line 2220 of file table_walker.cc.

References ArmISA::L1, ArmISA::L2, ArmISA::L3, and panic.

Referenced by doLongDescriptor().

◆ walk()

Fault TableWalker::walk	(	const RequestPtr &	req,
		ThreadContext *	tc,
		uint16_t	asid,
		uint8_t	_vmid,
		bool	_isHyp,
		TLB::Mode	mode,
		TLB::Translation *	_trans,
		bool	timing,
		bool	functional,
		bool	secure,
		TLB::ArmTranslationType	tranType,
		bool	_stage2Req
	)

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

Definition at line 189 of file table_walker.cc.

Referenced by ArmISA::TLB::getTE().

Member Data Documentation

◆ _haveLargeAsid64

bool ArmISA::TableWalker::_haveLargeAsid64

protected

Definition at line 858 of file table_walker.hh.

Referenced by haveLargeAsid64().

◆ _haveLPAE

bool ArmISA::TableWalker::_haveLPAE

protected

Definition at line 855 of file table_walker.hh.

Referenced by haveLPAE(), and memAttrsLPAE().

◆ _haveVirtualization

bool ArmISA::TableWalker::_haveVirtualization

protected

Definition at line 856 of file table_walker.hh.

Referenced by haveVirtualization(), and walk().

◆ COMPLETED

const unsigned ArmISA::TableWalker::COMPLETED = 1

staticprotected

Definition at line 881 of file table_walker.hh.

Referenced by insertTableEntry().

◆ currState

WalkerState* ArmISA::TableWalker::currState

protected

◆ doL0LongDescEvent

EventFunctionWrapper ArmISA::TableWalker::doL0LongDescEvent

private

Definition at line 938 of file table_walker.hh.

◆ doL1DescEvent

EventFunctionWrapper ArmISA::TableWalker::doL1DescEvent

private

Definition at line 929 of file table_walker.hh.

Referenced by processWalk().

◆ doL1LongDescEvent

EventFunctionWrapper ArmISA::TableWalker::doL1LongDescEvent

private

Definition at line 940 of file table_walker.hh.

◆ doL2DescEvent

EventFunctionWrapper ArmISA::TableWalker::doL2DescEvent

private

Definition at line 933 of file table_walker.hh.

Referenced by doL1Descriptor().

◆ doL2LongDescEvent

EventFunctionWrapper ArmISA::TableWalker::doL2LongDescEvent

private

Definition at line 942 of file table_walker.hh.

◆ doL3LongDescEvent

EventFunctionWrapper ArmISA::TableWalker::doL3LongDescEvent

private

Definition at line 944 of file table_walker.hh.

◆ doProcessEvent

EventFunctionWrapper ArmISA::TableWalker::doProcessEvent

private

Definition at line 965 of file table_walker.hh.

Referenced by nextWalk().

◆ haveSecurity

bool ArmISA::TableWalker::haveSecurity

protected

Cached copies of system-level properties.

Definition at line 854 of file table_walker.hh.

Referenced by insertTableEntry(), processWalk(), and walk().

◆ isStage2

const bool ArmISA::TableWalker::isStage2

protected

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

Definition at line 836 of file table_walker.hh.

Referenced by doL1Descriptor(), doL2Descriptor(), generateLongDescFault(), getPort(), insertTableEntry(), memAttrsAArch64(), memAttrsLPAE(), processWalk(), processWalkAArch64(), processWalkLPAE(), processWalkWrapper(), and walk().

◆ LongDescEventByLevel

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

private

Definition at line 947 of file table_walker.hh.

Referenced by doLongDescriptor(), and processWalkLPAE().

◆ numSquashable

unsigned ArmISA::TableWalker::numSquashable

protected

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

Definition at line 851 of file table_walker.hh.

Referenced by processWalkWrapper().

◆ pending

bool ArmISA::TableWalker::pending

protected

If a timing translation is currently in progress.

Definition at line 847 of file table_walker.hh.

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

◆ pendingChangeTick

Tick ArmISA::TableWalker::pendingChangeTick

mutableprotected

Definition at line 878 of file table_walker.hh.

Referenced by pendingChange().

◆ pendingQueue

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

protected

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

Definition at line 824 of file table_walker.hh.

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

◆ pendingReqs

unsigned ArmISA::TableWalker::pendingReqs

mutableprotected

Definition at line 877 of file table_walker.hh.

Referenced by pendingChange().

◆ physAddrRange

uint8_t ArmISA::TableWalker::physAddrRange

protected

Definition at line 857 of file table_walker.hh.

Referenced by walk().

◆ port

DmaPort* ArmISA::TableWalker::port

protected

Port shared by the two table walkers.

Definition at line 830 of file table_walker.hh.

Referenced by fetchDescriptor(), getPort(), init(), and setMMU().

◆ REQUESTED

const unsigned ArmISA::TableWalker::REQUESTED = 0

staticprotected

Definition at line 880 of file table_walker.hh.

Referenced by walk().

◆ requestorId

RequestorID ArmISA::TableWalker::requestorId

protected

Requestor id assigned by the MMU.

Definition at line 833 of file table_walker.hh.

Referenced by fetchDescriptor(), and setMMU().

◆ sctlr

SCTLR ArmISA::TableWalker::sctlr

protected

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

Definition at line 842 of file table_walker.hh.

Referenced by memAttrs(), and walk().

◆ stage2Mmu

Stage2MMU* ArmISA::TableWalker::stage2Mmu

protected

The MMU to forward second stage look upts to.

Definition at line 827 of file table_walker.hh.

Referenced by fetchDescriptor(), init(), and setMMU().

◆ stateQueues

std::list<WalkerState *> ArmISA::TableWalker::stateQueues[MAX_LOOKUP_LEVELS]

protected

Queues of requests for all the different lookup levels.

Definition at line 820 of file table_walker.hh.

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

◆ stats

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

protected

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

◆ tlb

TLB* ArmISA::TableWalker::tlb

protected

TLB that is initiating these table walks.

Definition at line 839 of file table_walker.hh.

Referenced by doL1DescriptorWrapper(), doL2DescriptorWrapper(), doLongDescriptorWrapper(), getTlb(), init(), insertTableEntry(), processWalkWrapper(), setTlb(), and testWalk().

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

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

Classes

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Static Protected Attributes

Private Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ Params

Member Enumeration Documentation

◆ GrainSize

Constructor & Destructor Documentation

◆ TableWalker()

◆ ~TableWalker()

Member Function Documentation

◆ adjustTableSizeAArch64()

◆ checkAddrSizeFaultAArch64()

◆ completeDrain()

◆ doL0LongDescriptorWrapper()

◆ doL1Descriptor()

◆ doL1DescriptorWrapper()

◆ doL1LongDescriptorWrapper()

◆ doL2Descriptor()

◆ doL2DescriptorWrapper()

◆ doL2LongDescriptorWrapper()

◆ doL3LongDescriptorWrapper()

◆ doLongDescriptor()

◆ doLongDescriptorWrapper()

◆ drain()

◆ drainResume()

◆ fetchDescriptor()

◆ generateLongDescFault()

◆ getPort()

◆ getTlb()

◆ haveLargeAsid64()

◆ haveLPAE()

◆ haveVirtualization()

◆ init()

◆ insertTableEntry()

◆ memAttrs()

◆ memAttrsAArch64()

◆ memAttrsLPAE()

◆ nextWalk()

◆ pageSizeNtoStatBin()

◆ params()

◆ pendingChange()

◆ processWalk()

◆ processWalkAArch64()

◆ processWalkLPAE()

◆ processWalkWrapper()

◆ setMMU()

◆ setTlb()

◆ testWalk()

◆ toLookupLevel()

◆ walk()

Member Data Documentation

◆ _haveLargeAsid64

◆ _haveLPAE

◆ _haveVirtualization

◆ COMPLETED

◆ currState

◆ doL0LongDescEvent

◆ doL1DescEvent

◆ doL1LongDescEvent

◆ doL2DescEvent

◆ doL2LongDescEvent

◆ doL3LongDescEvent

◆ doProcessEvent

◆ haveSecurity

◆ isStage2

◆ LongDescEventByLevel

◆ numSquashable

◆ pending

◆ pendingChangeTick

◆ pendingQueue

◆ pendingReqs