Long-descriptor format (LPAE) More...

#include <table_walker.hh>

Inheritance diagram for gem5::ArmISA::TableWalker::LongDescriptor:

Public Types
enum	EntryType { Invalid , Table , Block , Page }
	Descriptor type. More...

Public Member Functions
	LongDescriptor ()

uint8_t *	getRawPtr () override

uint64_t	getRawData () const override

std::string	dbgHeader () const override

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

EntryType	type () const
	Return the descriptor type.

uint8_t	offsetBits () const override
	Return the bit width of the page/block offset.

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

Addr	paddr () const
	Return the physical address of the entry.

Addr	nextTableAddr () const
	Return the address of the next page table.

Addr	nextDescAddr (Addr va) const
	Return the address of the next descriptor.

bool	xn () const override
	Is execution allowed on this mapping?

bool	pxn () const
	Is privileged execution allowed on this mapping? (LPAE only)

bool	contiguousHint () const
	Contiguous hint bit.

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

bool	af () const
	Returns true if the access flag (AF) is set.

uint8_t	sh () const
	2-bit shareability field

uint8_t	ap () const override
	2-bit access protection flags

bool	rw () const
	Read/write access protection flag.

bool	user () const
	User/privileged level access protection flag.

TlbEntry::DomainType	domain () const override

uint8_t	attrIndx () const
	Attribute index.

uint8_t	memAttr () const
	Memory attributes, only used by stage 2 translations.

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

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

bool	secureTable () const
	Whether the subsequent levels of lookup are secure.

uint8_t	apTable () const
	Two bit access protection flags for subsequent levels of lookup.

uint8_t	rwTable () const
	R/W protection flag for subsequent levels of lookup.

uint8_t	userTable () const
	User/privileged mode protection flag for subsequent levels of lookup.

bool	xnTable () const
	Is execution allowed on subsequent lookup levels?

bool	pxnTable () const
	Is privileged execution allowed on subsequent lookup levels?

Public Member Functions inherited from gem5::ArmISA::TableWalker::DescriptorBase
	DescriptorBase ()

virtual uint8_t	texcb () const

virtual bool	shareable () const

Static Public Member Functions
static uint8_t	ap (bool rw, bool user)
	Return the AP bits as compatible with the AP[2:0] format.

Public Attributes
uint64_t	data
	The raw bits of the entry.

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

bool	aarch64
	True if the current lookup is performed in AArch64 state.

GrainSize	grainSize
	Width of the granule size in bits.

uint8_t	physAddrRange

Public Attributes inherited from gem5::ArmISA::TableWalker::DescriptorBase
LookupLevel	lookupLevel
	Current lookup level for this descriptor.

Detailed Description

Long-descriptor format (LPAE)

Definition at line 425 of file table_walker.hh.

Member Enumeration Documentation

◆ EntryType

enum gem5::ArmISA::TableWalker::LongDescriptor::EntryType

Descriptor type.

Enumerator
Invalid
Table
Block
Page

Definition at line 429 of file table_walker.hh.

Constructor & Destructor Documentation

◆ LongDescriptor()

gem5::ArmISA::TableWalker::LongDescriptor::LongDescriptor ( )

inline

Definition at line 437 of file table_walker.hh.

Member Function Documentation

◆ af()

bool gem5::ArmISA::TableWalker::LongDescriptor::af ( ) const

inline

Returns true if the access flag (AF) is set.

Definition at line 683 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ ap() [1/2]

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::ap ( ) const

inlineoverridevirtual

2-bit access protection flags

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 699 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor(), and gem5::ArmISA::TableWalker::insertTableEntry().

◆ ap() [2/2]

static uint8_t gem5::ArmISA::TableWalker::LongDescriptor::ap	(	bool	rw,
		bool	user )

inlinestatic

Return the AP bits as compatible with the AP[2:0] format.

Utility function used to simplify the code in the TLB for performing permission checks.

Definition at line 726 of file table_walker.hh.

References rw(), and user().

◆ apTable()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::apTable ( ) const

inline

Two bit access protection flags for subsequent levels of lookup.

Definition at line 780 of file table_walker.hh.

References gem5::bits(), data, Table, and type().

◆ attrIndx()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::attrIndx ( ) const

inline

Attribute index.

Definition at line 740 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::memAttrsAArch64(), and gem5::ArmISA::TableWalker::memAttrsLPAE().

◆ contiguousHint()

bool gem5::ArmISA::TableWalker::LongDescriptor::contiguousHint ( ) const

inline

Contiguous hint bit.

Definition at line 654 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

◆ dbgHeader()

std::string gem5::ArmISA::TableWalker::LongDescriptor::dbgHeader ( ) const

inlineoverridevirtual

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 470 of file table_walker.hh.

References Block, gem5::ArmISA::TableWalker::DescriptorBase::lookupLevel, Page, panic, Table, and type().

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry().

◆ dirty()

bool gem5::ArmISA::TableWalker::LongDescriptor::dirty ( ) const

inline

This entry needs to be written back to memory.

Definition at line 765 of file table_walker.hh.

References _dirty.

◆ domain()

TlbEntry::DomainType gem5::ArmISA::TableWalker::LongDescriptor::domain ( ) const

inlineoverridevirtual

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 732 of file table_walker.hh.

References gem5::ArmISA::TlbEntry::Client.

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry().

◆ getRawData()

uint64_t gem5::ArmISA::TableWalker::LongDescriptor::getRawData ( ) const

inlineoverridevirtual

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 464 of file table_walker.hh.

References data.

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry().

◆ getRawPtr()

uint8_t * gem5::ArmISA::TableWalker::LongDescriptor::getRawPtr ( )

inlineoverridevirtual

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 458 of file table_walker.hh.

References data.

◆ global()

bool gem5::ArmISA::TableWalker::LongDescriptor::global ( WalkerState * currState ) const

inlineoverridevirtual

Is the translation global (no asid used)?

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 662 of file table_walker.hh.

References gem5::ArmISA::TableWalker::WalkerState::aarch64, gem5::bits(), gem5::ArmISA::TableWalker::currState, data, gem5::ArmISA::MMU::hasUnprivRegime(), gem5::ArmISA::TableWalker::WalkerState::isSecure, Page, gem5::ArmISA::TableWalker::WalkerState::regime, gem5::ArmISA::TableWalker::WalkerState::secureLookup, and type().

◆ memAttr()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::memAttr ( ) const

inline

Memory attributes, only used by stage 2 translations.

Definition at line 748 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::memAttrsAArch64(), and gem5::ArmISA::TableWalker::memAttrsLPAE().

◆ nextDescAddr()

Addr gem5::ArmISA::TableWalker::LongDescriptor::nextDescAddr ( Addr va ) const

inline

Return the address of the next descriptor.

Definition at line 618 of file table_walker.hh.

References aarch64, gem5::bits(), grainSize, gem5::ArmISA::TableWalker::DescriptorBase::lookupLevel, nextTableAddr(), gem5::ArmISA::pa, gem5::ArmISA::stride, Table, type(), and gem5::ArmISA::va.

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ nextTableAddr()

Addr gem5::ArmISA::TableWalker::LongDescriptor::nextTableAddr ( ) const

inline

Return the address of the next page table.

Definition at line 600 of file table_walker.hh.

References aarch64, gem5::bits(), data, gem5::ArmISA::Grain64KB, grainSize, gem5::mbits(), physAddrRange, Table, and type().

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry(), and nextDescAddr().

◆ offsetBits()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::offsetBits ( ) const

inlineoverridevirtual

Return the bit width of the page/block offset.

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 544 of file table_walker.hh.

References gem5::ArmISA::getPageTableOps(), gem5::ArmISA::Grain16KB, gem5::ArmISA::Grain4KB, gem5::ArmISA::Grain64KB, grainSize, gem5::ArmISA::TableWalker::DescriptorBase::lookupLevel, Page, panic, Table, and type().

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry(), paddr(), and pfn().

◆ paddr()

Addr gem5::ArmISA::TableWalker::LongDescriptor::paddr ( ) const

inline

Return the physical address of the entry.

Definition at line 584 of file table_walker.hh.

References aarch64, gem5::X86ISA::addr, gem5::bits(), data, gem5::ArmISA::Grain64KB, grainSize, gem5::mbits(), offsetBits(), and physAddrRange.

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor(), and pfn().

◆ pfn()

Addr gem5::ArmISA::TableWalker::LongDescriptor::pfn ( ) const

inlineoverridevirtual

Return the physical frame, bits shifted right.

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 577 of file table_walker.hh.

References offsetBits(), and paddr().

◆ pxn()

bool gem5::ArmISA::TableWalker::LongDescriptor::pxn ( ) const

inline

Is privileged execution allowed on this mapping? (LPAE only)

Definition at line 646 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor(), and gem5::ArmISA::TableWalker::insertTableEntry().

◆ pxnTable()

bool gem5::ArmISA::TableWalker::LongDescriptor::pxnTable ( ) const

inline

Is privileged execution allowed on subsequent lookup levels?

Definition at line 813 of file table_walker.hh.

References gem5::bits(), data, Table, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ rw()

bool gem5::ArmISA::TableWalker::LongDescriptor::rw ( ) const

inline

Read/write access protection flag.

Definition at line 708 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by ap().

◆ rwTable()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::rwTable ( ) const

inline

R/W protection flag for subsequent levels of lookup.

Definition at line 788 of file table_walker.hh.

References gem5::bits(), data, Table, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ secure()

bool gem5::ArmISA::TableWalker::LongDescriptor::secure	(	bool	have_security,
		WalkerState *	currState ) const

inlineoverridevirtual

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

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 491 of file table_walker.hh.

References gem5::bits(), gem5::ArmISA::TableWalker::currState, data, Page, gem5::ArmISA::TableWalker::WalkerState::secureLookup, and type().

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry().

◆ secureTable()

bool gem5::ArmISA::TableWalker::LongDescriptor::secureTable ( ) const

inline

Whether the subsequent levels of lookup are secure.

Definition at line 772 of file table_walker.hh.

References gem5::bits(), data, Table, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ setAf()

void gem5::ArmISA::TableWalker::LongDescriptor::setAf ( )

inline

Set access flag that this entry has been touched.

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

Definition at line 757 of file table_walker.hh.

References _dirty, and data.

◆ sh()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::sh ( ) const

inline

2-bit shareability field

Definition at line 691 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::memAttrsAArch64(), and gem5::ArmISA::TableWalker::memAttrsLPAE().

◆ type()

EntryType gem5::ArmISA::TableWalker::LongDescriptor::type ( ) const

inline

Return the descriptor type.

Definition at line 503 of file table_walker.hh.

References gem5::bits(), Block, data, gem5::ArmISA::Grain16KB, gem5::ArmISA::Grain4KB, gem5::ArmISA::Grain64KB, grainSize, Invalid, gem5::ArmISA::TableWalker::DescriptorBase::lookupLevel, Page, physAddrRange, and Table.

Referenced by af(), ap(), apTable(), attrIndx(), contiguousHint(), dbgHeader(), gem5::ArmISA::TableWalker::doLongDescriptor(), global(), memAttr(), nextDescAddr(), nextTableAddr(), offsetBits(), pxn(), pxnTable(), rw(), rwTable(), secure(), secureTable(), sh(), user(), userTable(), xn(), and xnTable().

◆ user()

bool gem5::ArmISA::TableWalker::LongDescriptor::user ( ) const

inline

User/privileged level access protection flag.

Definition at line 716 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by ap().

◆ userTable()

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::userTable ( ) const

inline

User/privileged mode protection flag for subsequent levels of lookup.

Definition at line 797 of file table_walker.hh.

References gem5::bits(), data, Table, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ xn()

bool gem5::ArmISA::TableWalker::LongDescriptor::xn ( ) const

inlineoverridevirtual

Is execution allowed on this mapping?

Implements gem5::ArmISA::TableWalker::DescriptorBase.

Definition at line 638 of file table_walker.hh.

References gem5::bits(), data, Page, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

◆ xnTable()

bool gem5::ArmISA::TableWalker::LongDescriptor::xnTable ( ) const

inline

Is execution allowed on subsequent lookup levels?

Definition at line 805 of file table_walker.hh.

References gem5::bits(), data, Table, and type().

Referenced by gem5::ArmISA::TableWalker::doLongDescriptor().

Member Data Documentation

◆ _dirty

bool gem5::ArmISA::TableWalker::LongDescriptor::_dirty

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

Definition at line 447 of file table_walker.hh.

Referenced by dirty(), and setAf().

◆ aarch64

bool gem5::ArmISA::TableWalker::LongDescriptor::aarch64

True if the current lookup is performed in AArch64 state.

Definition at line 450 of file table_walker.hh.

Referenced by nextDescAddr(), nextTableAddr(), paddr(), gem5::ArmISA::TableWalker::processWalkAArch64(), and gem5::ArmISA::TableWalker::processWalkLPAE().

◆ data

uint64_t gem5::ArmISA::TableWalker::LongDescriptor::data

The raw bits of the entry.

Definition at line 443 of file table_walker.hh.

Referenced by af(), ap(), apTable(), attrIndx(), contiguousHint(), gem5::ArmISA::TableWalker::doLongDescriptor(), getRawData(), getRawPtr(), global(), memAttr(), nextTableAddr(), paddr(), pxn(), pxnTable(), rw(), rwTable(), secure(), secureTable(), setAf(), sh(), type(), user(), userTable(), xn(), and xnTable().

◆ grainSize

GrainSize gem5::ArmISA::TableWalker::LongDescriptor::grainSize

Width of the granule size in bits.

Definition at line 453 of file table_walker.hh.

Referenced by gem5::ArmISA::TableWalker::insertPartialTableEntry(), gem5::ArmISA::TableWalker::insertTableEntry(), nextDescAddr(), nextTableAddr(), offsetBits(), paddr(), gem5::ArmISA::TableWalker::processWalkAArch64(), gem5::ArmISA::TableWalker::processWalkLPAE(), and type().

◆ physAddrRange

uint8_t gem5::ArmISA::TableWalker::LongDescriptor::physAddrRange

Definition at line 455 of file table_walker.hh.

Referenced by nextTableAddr(), paddr(), gem5::ArmISA::TableWalker::processWalkAArch64(), and type().

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

arch/arm/table_walker.hh

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Member Enumeration Documentation

◆ EntryType

Constructor & Destructor Documentation

◆ LongDescriptor()

Member Function Documentation

◆ af()

◆ ap() [1/2]

◆ ap() [2/2]

◆ apTable()

◆ attrIndx()

◆ contiguousHint()

◆ dbgHeader()

◆ dirty()

◆ domain()

◆ getRawData()

◆ getRawPtr()

◆ global()

◆ memAttr()

◆ nextDescAddr()

◆ nextTableAddr()

◆ offsetBits()

◆ paddr()

◆ pfn()

◆ pxn()

◆ pxnTable()

◆ rw()

◆ rwTable()

◆ secure()

◆ secureTable()

◆ setAf()

◆ sh()

◆ type()

◆ user()

◆ userTable()

◆ xn()

◆ xnTable()

Member Data Documentation

◆ _dirty

◆ aarch64

◆ data

◆ grainSize

◆ physAddrRange