Declaration of the coherent crossbar memory-side port type, one will be instantiated for each of the CPU-side-port interfaces connecting to the crossbar. More...

#include <coherent_xbar.hh>

Inheritance diagram for gem5::CoherentXBar::CoherentXBarRequestPort:

Public Member Functions
	CoherentXBarRequestPort (const std::string &_name, CoherentXBar &_xbar, PortID _id)

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
bool	isSnooping () const override
	Determine if this port should be considered a snooper.

bool	recvTimingResp (PacketPtr pkt) override
	Receive a timing response from the peer.

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

Tick	recvAtomicSnoop (PacketPtr pkt) override
	Receive an atomic snoop request packet from our peer.

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

void	recvRangeChange () override
	Called to receive an address range change from the peer response port.

void	recvReqRetry () override
	Called by the peer if sendTimingReq was called on this peer (causing recvTimingReq to be called on the peer) and was unsuccessful.

Protected Member Functions inherited from gem5::RequestPort
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.

Private Attributes
CoherentXBar &	xbar
	A reference to the crossbar to which this port belongs.

Additional Inherited Members
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

Declaration of the coherent crossbar memory-side port type, one will be instantiated for each of the CPU-side-port interfaces connecting to the crossbar.

Definition at line 159 of file coherent_xbar.hh.

Constructor & Destructor Documentation

◆ CoherentXBarRequestPort()

gem5::CoherentXBar::CoherentXBarRequestPort::CoherentXBarRequestPort	(	const std::string &	_name,
		CoherentXBar &	_xbar,
		PortID	_id )

inline

Definition at line 167 of file coherent_xbar.hh.

Member Function Documentation

◆ isSnooping()

bool gem5::CoherentXBar::CoherentXBarRequestPort::isSnooping ( ) const

inlineoverrideprotectedvirtual

Determine if this port should be considered a snooper.

For a coherent crossbar memory-side port this is always true.

Returns: a boolean that is true if this port is snooping

Reimplemented from gem5::RequestPort.

Definition at line 180 of file coherent_xbar.hh.

◆ recvAtomicSnoop()

Tick gem5::CoherentXBar::CoherentXBarRequestPort::recvAtomicSnoop ( PacketPtr pkt )

inlineoverrideprotectedvirtual

Receive an atomic snoop request packet from our peer.

Implements gem5::AtomicRequestProtocol.

Definition at line 195 of file coherent_xbar.hh.

References gem5::CoherentXBar::recvAtomicSnoop(), and xbar.

◆ recvFunctionalSnoop()

void gem5::CoherentXBar::CoherentXBarRequestPort::recvFunctionalSnoop ( PacketPtr pkt )

inlineoverrideprotectedvirtual

Receive a functional snoop request packet from the peer.

Implements gem5::FunctionalRequestProtocol.

Definition at line 201 of file coherent_xbar.hh.

References gem5::CoherentXBar::recvFunctionalSnoop(), and xbar.

◆ recvRangeChange()

void gem5::CoherentXBar::CoherentXBarRequestPort::recvRangeChange ( )

inlineoverrideprotectedvirtual

Called to receive an address range change from the peer response port.

The default implementation ignores the change and does nothing. Override this function in a derived class if the owner needs to be aware of the address ranges, e.g. in an interconnect component like a bus.

Reimplemented from gem5::RequestPort.

Definition at line 206 of file coherent_xbar.hh.

References gem5::BaseXBar::recvRangeChange(), and xbar.