Line fetch data in the forward direction. More...

#include <pipe_data.hh>

Public Member Functions
	ForwardLineData ()

	ForwardLineData (const ForwardLineData &other)

ForwardLineData &	operator= (const ForwardLineData &other)

	~ForwardLineData ()

bool	isFault () const
	This is a fault, not a line.

void	setFault (Fault fault_)
	Set fault and possible clear the bubble flag.

void	allocateLine (unsigned int width_)
	In-place initialise a ForwardLineData, freeing and overridding the line.

void	adoptPacketData (Packet *packet)
	Use the data from a packet as line instead of allocating new space.

void	freeLine ()
	Free this ForwardLineData line.

bool	isBubble () const

void	reportData (std::ostream &os) const
	ReportIF interface.

Static Public Member Functions
static ForwardLineData	bubble ()
	BubbleIF interface.

Public Attributes
Addr	lineBaseAddr = 0
	First byte address in the line.

std::unique_ptr< PCStateBase >	pc
	PC of the first inst within this sequence.

Addr	fetchAddr
	Address of this line of data.

unsigned int	lineWidth = 0
	Explicit line width, don't rely on data.size.

Fault	fault = NoFault
	This line has a fault.

InstId	id
	Thread, stream, prediction ... id of this line.

uint8_t *	line = nullptr
	Line data.

Packet *	packet = nullptr
	Packet from which the line is taken.

Private Attributes
bool	bubbleFlag = true
	This line is a bubble.

Detailed Description

Line fetch data in the forward direction.

Contains a single cache line (or fragment of a line), its address, a sequence number assigned when that line was fetched and a bubbleFlag that can allow ForwardLineData to be used to represent the absence of line data in a pipeline.

Definition at line 186 of file pipe_data.hh.

Constructor & Destructor Documentation

◆ ForwardLineData() [1/2]

gem5::minor::ForwardLineData::ForwardLineData ( )

inline

Definition at line 224 of file pipe_data.hh.

Referenced by bubble().

◆ ForwardLineData() [2/2]

gem5::minor::ForwardLineData::ForwardLineData ( const ForwardLineData & other )

inline

Definition at line 225 of file pipe_data.hh.

◆ ~ForwardLineData()

gem5::minor::ForwardLineData::~ForwardLineData ( )

inline

Definition at line 246 of file pipe_data.hh.

References line.

Member Function Documentation

◆ adoptPacketData()

void gem5::minor::ForwardLineData::adoptPacketData ( Packet * packet )

Use the data from a packet as line instead of allocating new space.

On destruction of this object, the packet will be destroyed

Definition at line 186 of file pipe_data.cc.

References bubbleFlag, gem5::Packet::getPtr(), isFault(), line, lineWidth, packet, and gem5::Packet::req.

Referenced by gem5::minor::Fetch1::processResponse().

◆ allocateLine()

void gem5::minor::ForwardLineData::allocateLine ( unsigned int width_ )

In-place initialise a ForwardLineData, freeing and overridding the line.

Definition at line 174 of file pipe_data.cc.

References bubbleFlag, isFault(), line, and lineWidth.

◆ bubble()

static ForwardLineData gem5::minor::ForwardLineData::bubble ( )

inlinestatic

BubbleIF interface.

Definition at line 270 of file pipe_data.hh.

References ForwardLineData().

◆ freeLine()

void gem5::minor::ForwardLineData::freeLine ( )

Free this ForwardLineData line.

Note that these are shared between line objects and so you must be careful when deallocating them. Copying of ForwardLineData can, therefore, be done by default copy constructors/assignment

Definition at line 199 of file pipe_data.cc.

References bubbleFlag, isBubble(), isFault(), line, and packet.

Referenced by gem5::minor::Fetch2::popInput().