DcachePort class for the load/store queue. More...

#include <lsq.hh>

Inheritance diagram for gem5::o3::LSQ::DcachePort:

Public Member Functions
	DcachePort (LSQ _lsq, CPU _cpu)
	Default constructor.

Public Member Functions inherited from gem5::RequestPort
	RequestPort (const std::string &name, SimObject *_owner, PortID id=InvalidPortID)
	Request port.

	RequestPort (const std::string &name, PortID id=InvalidPortID)

virtual	~RequestPort ()

void	bind (Port &peer) override
	Bind this request port to a response port.

void	unbind () override
	Unbind this request port and the associated response port.

AddrRangeList	getAddrRanges () const
	Get the address ranges of the connected responder port.

void	printAddr (Addr a)
	Inject a PrintReq for the given address to print the state of that address throughout the memory system.

Tick	sendAtomic (PacketPtr pkt)
	Send an atomic request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses.

Tick	sendAtomicBackdoor (PacketPtr pkt, MemBackdoorPtr &backdoor)
	Send an atomic request packet like above, but also request a backdoor to the data being accessed.

void	sendFunctional (PacketPtr pkt) const
	Send a functional request packet, where the data is instantly updated everywhere in the memory system, without affecting the current state of any block or moving the block.

void	sendMemBackdoorReq (const MemBackdoorReq &req, MemBackdoorPtr &backdoor)
	Send a request for a back door to a range of memory.

bool	sendTimingReq (PacketPtr pkt)
	Attempt to send a timing request to the responder port by calling its corresponding receive function.

bool	tryTiming (PacketPtr pkt) const
	Check if the responder can handle a timing request.

bool	sendTimingSnoopResp (PacketPtr pkt)
	Attempt to send a timing snoop response packet to the response port by calling its corresponding receive function.

virtual void	sendRetryResp ()
	Send a retry to the response port that previously attempted a sendTimingResp to this request port and failed.

Public Member Functions inherited from gem5::Port
virtual	~Port ()
	Virtual destructor due to inheritance.

Port &	getPeer ()
	Return a reference to this port's peer.

const std::string	name () const
	Return port name (for DPRINTF).

PortID	getId () const
	Get the port id.

bool	isConnected () const
	Is this port currently connected to a peer?

void	takeOverFrom (Port *old)
	A utility function to make it easier to swap out ports.

Protected Member Functions
virtual bool	recvTimingResp (PacketPtr pkt)
	Timing version of receive.

virtual void	recvTimingSnoopReq (PacketPtr pkt)
	Receive a timing snoop request from the peer.

virtual void	recvFunctionalSnoop (PacketPtr pkt)
	Receive a functional snoop request packet from the peer.

virtual void	recvReqRetry ()
	Handles doing a retry of the previous send.

virtual bool	isSnooping () const
	As this CPU requires snooping to maintain the load store queue change the behaviour from the base CPU port.

Protected Member Functions inherited from gem5::RequestPort
virtual void	recvRangeChange ()
	Called to receive an address range change from the peer response port.

Tick	recvAtomicSnoop (PacketPtr pkt) override
	Default implementations.

void	recvFunctionalSnoop (PacketPtr pkt) override
	Receive a functional snoop request packet from the peer.

void	recvTimingSnoopReq (PacketPtr pkt) override
	Receive a timing snoop request from the peer.

void	recvRetrySnoopResp () override
	Called by the peer if sendTimingSnoopResp was called on this protocol (causing recvTimingSnoopResp to be called on the peer) and was unsuccessful.

Protected Member Functions inherited from gem5::Port
void	reportUnbound () const

	Port (const std::string &_name, PortID _id)
	Abstract base class for ports.

Protected Member Functions inherited from gem5::AtomicRequestProtocol
Tick	send (AtomicResponseProtocol *peer, PacketPtr pkt)
	Send an atomic request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses.

Tick	sendBackdoor (AtomicResponseProtocol *peer, PacketPtr pkt, MemBackdoorPtr &backdoor)
	Send an atomic request packet like above, but also request a backdoor to the data being accessed.

Protected Member Functions inherited from gem5::TimingRequestProtocol
bool	sendReq (TimingResponseProtocol *peer, PacketPtr pkt)
	Attempt to send a timing request to the peer by calling its corresponding receive function.

bool	trySend (TimingResponseProtocol *peer, PacketPtr pkt) const
	Check if the peer can handle a timing request.

bool	sendSnoopResp (TimingResponseProtocol *peer, PacketPtr pkt)
	Attempt to send a timing snoop response packet to it's peer by calling its corresponding receive function.

void	sendRetryResp (TimingResponseProtocol *peer)
	Send a retry to the peer that previously attempted a sendTimingResp to this protocol and failed.

Protected Member Functions inherited from gem5::FunctionalRequestProtocol
void	send (FunctionalResponseProtocol *peer, PacketPtr pkt) const
	Send a functional request packet, where the data is instantly updated everywhere in the memory system, without affecting the current state of any block or moving the block.

void	sendMemBackdoorReq (FunctionalResponseProtocol *peer, const MemBackdoorReq &req, MemBackdoorPtr &backdoor)
	Send a request for a back door to a range of memory.

Protected Attributes
LSQ *	lsq
	Pointer to LSQ.

CPU *	cpu

Protected Attributes inherited from gem5::RequestPort
SimObject &	owner

Protected Attributes inherited from gem5::Port
const PortID	id
	A numeric identifier to distinguish ports in a vector, and set to InvalidPortID in case this port is not part of a vector.

Port *	_peer
	A pointer to this port's peer.

bool	_connected
	Whether this port is currently connected to a peer port.

Detailed Description

DcachePort class for the load/store queue.

Definition at line 83 of file lsq.hh.

Constructor & Destructor Documentation

◆ DcachePort()

gem5::o3::LSQ::DcachePort::DcachePort	(	LSQ *	_lsq,
		CPU *	_cpu )

Default constructor.

Definition at line 67 of file lsq.cc.

Member Function Documentation

◆ isSnooping()

virtual bool gem5::o3::LSQ::DcachePort::isSnooping ( ) const

inlineprotectedvirtual

As this CPU requires snooping to maintain the load store queue change the behaviour from the base CPU port.

Returns: true since we have to snoop

Reimplemented from gem5::RequestPort.

Definition at line 118 of file lsq.hh.

◆ recvFunctionalSnoop()

virtual void gem5::o3::LSQ::DcachePort::recvFunctionalSnoop ( PacketPtr pkt )

inlineprotectedvirtual

Receive a functional snoop request packet from the peer.

Implements gem5::FunctionalRequestProtocol.

Definition at line 104 of file lsq.hh.

◆ recvReqRetry()

void gem5::o3::LSQ::DcachePort::recvReqRetry ( )

protectedvirtual

Handles doing a retry of the previous send.

Implements gem5::TimingRequestProtocol.

Definition at line 1429 of file lsq.cc.

◆ recvTimingResp()

bool gem5::o3::LSQ::DcachePort::recvTimingResp ( PacketPtr pkt )

protectedvirtual

Timing version of receive.

Handles writing back and completing the load or store that has returned from memory.

Implements gem5::TimingRequestProtocol.

Definition at line 1412 of file lsq.cc.

◆ recvTimingSnoopReq()

void gem5::o3::LSQ::DcachePort::recvTimingSnoopReq ( PacketPtr pkt )

protectedvirtual

Receive a timing snoop request from the peer.

Implements gem5::TimingRequestProtocol.

Definition at line 1418 of file lsq.cc.

References gem5::o3::LSQ::cpu, gem5::AddressMonitor::doMonitor(), gem5::BaseCPU::getCpuAddrMonitor(), gem5::BaseCPU::numThreads, and gem5::o3::CPU::wakeup().

Member Data Documentation

◆ cpu

CPU* gem5::o3::LSQ::DcachePort::cpu

protected

Definition at line 89 of file lsq.hh.

◆ lsq

LSQ* gem5::o3::LSQ::DcachePort::lsq

protected

Pointer to LSQ.

Definition at line 88 of file lsq.hh.

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

cpu/o3/lsq.hh
cpu/o3/lsq.cc

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ DcachePort()

Member Function Documentation

◆ isSnooping()

◆ recvFunctionalSnoop()

◆ recvReqRetry()

◆ recvTimingResp()

◆ recvTimingSnoopReq()

Member Data Documentation

◆ cpu

◆ lsq