#include <table_walker.hh>

Inheritance diagram for ArmISA::TableWalker::L1Descriptor:

Public Types
enum	EntryType { Ignore, PageTable, Section, Reserved }
	Type of page table entry ARM DDI 0406B: B3-8. More...

Public Member Functions
	L1Descriptor ()
	Default ctor. More...

virtual uint64_t	getRawData () const

virtual std::string	dbgHeader () const

virtual uint8_t	offsetBits () const

EntryType	type () const

bool	supersection () const
	Is the page a Supersection (16MB)? More...

Addr	paddr () const
	Return the physcal address of the entry, bits in position. More...

Addr	paddr (Addr va) const
	Return the physcal address of the entry, bits in position. More...

Addr	pfn () const
	Return the physical frame, bits shifted right. More...

bool	global (WalkerState *currState) const
	Is the translation global (no asid used)? More...

bool	xn () const
	Is the translation not allow execution? More...

uint8_t	ap () const
	Three bit access protection flags. More...

TlbEntry::DomainType	domain () const
	Domain Client/Manager: ARM DDI 0406B: B3-31. More...

Addr	l2Addr () const
	Address of L2 descriptor if it exists. More...

uint8_t	texcb () const
	Memory region attributes: ARM DDI 0406B: B3-32. More...

bool	shareable () const
	If the section is shareable. More...

void	setAp0 ()
	Set access flag that this entry has been touched. More...

bool	dirty () const
	This entry needs to be written back to memory. More...

bool	secure (bool have_security, WalkerState *currState) const
	Returns true if this entry targets the secure physical address map. More...

Public Member Functions inherited from ArmISA::TableWalker::DescriptorBase
	DescriptorBase ()

Public Attributes
uint32_t	data
	The raw bits of the entry. More...

bool	_dirty
	This entry has been modified (access flag set) and needs to be written back to memory. More...

Public Attributes inherited from ArmISA::TableWalker::DescriptorBase
LookupLevel	lookupLevel
	Current lookup level for this descriptor. More...

Detailed Description

Definition at line 92 of file table_walker.hh.

Member Enumeration Documentation

◆ EntryType

enum ArmISA::TableWalker::L1Descriptor::EntryType

Type of page table entry ARM DDI 0406B: B3-8.

Enumerator
Ignore
PageTable
Section
Reserved

Definition at line 95 of file table_walker.hh.

Constructor & Destructor Documentation

◆ L1Descriptor()

ArmISA::TableWalker::L1Descriptor::L1Descriptor ( )

inline

Default ctor.

Definition at line 110 of file table_walker.hh.

References ArmISA::L1, and ArmISA::TableWalker::DescriptorBase::lookupLevel.

Member Function Documentation

◆ ap()

uint8_t ArmISA::TableWalker::L1Descriptor::ap ( ) const

inlinevirtual

Three bit access protection flags.

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 178 of file table_walker.hh.

References bits(), and data.

Referenced by ArmISA::TableWalker::doL1Descriptor().

◆ dbgHeader()

virtual std::string ArmISA::TableWalker::L1Descriptor::dbgHeader ( ) const

inlinevirtual

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 120 of file table_walker.hh.

◆ dirty()

bool ArmISA::TableWalker::L1Descriptor::dirty ( ) const

inline

This entry needs to be written back to memory.

Definition at line 221 of file table_walker.hh.

References _dirty.

◆ domain()

TlbEntry::DomainType ArmISA::TableWalker::L1Descriptor::domain ( ) const

inlinevirtual

Domain Client/Manager: ARM DDI 0406B: B3-31.

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 184 of file table_walker.hh.

References bits(), and data.

Referenced by ArmISA::TableWalker::doL1Descriptor(), ArmISA::TableWalker::doL2Descriptor(), and ArmISA::TableWalker::L2Descriptor::domain().

◆ getRawData()

virtual uint64_t ArmISA::TableWalker::L1Descriptor::getRawData ( ) const

inlinevirtual

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 115 of file table_walker.hh.

References data.

◆ global()

bool ArmISA::TableWalker::L1Descriptor::global ( WalkerState * currState ) const

inlinevirtual

Is the translation global (no asid used)?

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 166 of file table_walker.hh.

References bits(), and data.

◆ l2Addr()

Addr ArmISA::TableWalker::L1Descriptor::l2Addr ( ) const

inline

Address of L2 descriptor if it exists.

Definition at line 190 of file table_walker.hh.

References data, and mbits().

Referenced by ArmISA::TableWalker::doL1Descriptor().

◆ offsetBits()

virtual uint8_t ArmISA::TableWalker::L1Descriptor::offsetBits ( ) const

inlinevirtual

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 125 of file table_walker.hh.

◆ paddr() [1/2]

Addr ArmISA::TableWalker::L1Descriptor::paddr ( ) const

inline

Return the physcal address of the entry, bits in position.

Definition at line 142 of file table_walker.hh.

References data, mbits(), panic, and supersection().

◆ paddr() [2/2]

Addr ArmISA::TableWalker::L1Descriptor::paddr ( Addr va ) const

inline

Return the physcal address of the entry, bits in position.

Definition at line 149 of file table_walker.hh.

References data, mbits(), panic, supersection(), and ArmISA::va.

◆ pfn()

Addr ArmISA::TableWalker::L1Descriptor::pfn ( ) const

inlinevirtual

Return the physical frame, bits shifted right.

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 158 of file table_walker.hh.

References bits(), data, panic, and supersection().

◆ secure()

bool ArmISA::TableWalker::L1Descriptor::secure	(	bool	have_security,
		WalkerState *	currState
	)		const

inlinevirtual

Returns true if this entry targets the secure physical address map.

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 230 of file table_walker.hh.

References bits(), ArmISA::TableWalker::currState, data, PageTable, ArmISA::TableWalker::WalkerState::secureLookup, and type().

Referenced by ArmISA::TableWalker::L2Descriptor::secure().

◆ setAp0()

void ArmISA::TableWalker::L1Descriptor::setAp0 ( )

inline

Set access flag that this entry has been touched.

Mark the entry as requiring a writeback, in the future.

Definition at line 214 of file table_walker.hh.

References _dirty, and data.

◆ shareable()

bool ArmISA::TableWalker::L1Descriptor::shareable ( ) const

inlinevirtual

If the section is shareable.

See texcb() comment.

Reimplemented from ArmISA::TableWalker::DescriptorBase.

Definition at line 206 of file table_walker.hh.

References bits(), and data.

◆ supersection()

bool ArmISA::TableWalker::L1Descriptor::supersection ( ) const

inline

Is the page a Supersection (16MB)?

Definition at line 136 of file table_walker.hh.

References bits(), and data.

Referenced by ArmISA::TableWalker::doL1Descriptor(), paddr(), and pfn().

◆ texcb()

uint8_t ArmISA::TableWalker::L1Descriptor::texcb ( ) const

inlinevirtual

Memory region attributes: ARM DDI 0406B: B3-32.

These bits are largly ignored by M5 and only used to provide the illusion that the memory system cares about anything but cachable vs. uncachable.

Reimplemented from ArmISA::TableWalker::DescriptorBase.

Definition at line 200 of file table_walker.hh.

References bits(), and data.

◆ type()

EntryType ArmISA::TableWalker::L1Descriptor::type ( ) const

inline

Definition at line 130 of file table_walker.hh.

References data.

Referenced by ArmISA::TableWalker::doL1Descriptor(), and secure().

◆ xn()

bool ArmISA::TableWalker::L1Descriptor::xn ( ) const

inlinevirtual

Is the translation not allow execution?

Implements ArmISA::TableWalker::DescriptorBase.

Definition at line 172 of file table_walker.hh.

References bits(), and data.

Member Data Documentation

◆ _dirty

bool ArmISA::TableWalker::L1Descriptor::_dirty

This entry has been modified (access flag set) and needs to be written back to memory.

Definition at line 107 of file table_walker.hh.

Referenced by dirty(), and setAp0().

◆ data

uint32_t ArmISA::TableWalker::L1Descriptor::data

The raw bits of the entry.

Definition at line 103 of file table_walker.hh.

Referenced by ap(), ArmISA::TableWalker::doL1Descriptor(), ArmISA::TableWalker::doL1DescriptorWrapper(), domain(), getRawData(), global(), l2Addr(), paddr(), pfn(), ArmISA::TableWalker::processWalk(), secure(), setAp0(), shareable(), supersection(), texcb(), type(), and xn().

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

arch/arm/table_walker.hh

Public Types

Public Member Functions

Public Attributes

Detailed Description

Member Enumeration Documentation

◆ EntryType

Constructor & Destructor Documentation

◆ L1Descriptor()

Member Function Documentation

◆ ap()

◆ dbgHeader()

◆ dirty()

◆ domain()

◆ getRawData()

◆ global()

◆ l2Addr()

◆ offsetBits()

◆ paddr() [1/2]

◆ paddr() [2/2]

◆ pfn()

◆ secure()

◆ setAp0()

◆ shareable()

◆ supersection()

◆ texcb()

◆ type()

◆ xn()

Member Data Documentation

◆ _dirty

◆ data