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

#include <coherent_xbar.hh>

Inheritance diagram for gem5::CoherentXBar::CoherentXBarResponsePort:

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

Public Member Functions inherited from gem5::QueuedResponsePort
	QueuedResponsePort (const std::string &name, RespPacketQueue &resp_queue, PortID id=InvalidPortID)
	Create a QueuedPort with a given name, owner, and a supplied implementation of a packet queue.

virtual	~QueuedResponsePort ()

void	schedTimingResp (PacketPtr pkt, Tick when)
	Schedule the sending of a timing response.

bool	trySatisfyFunctional (PacketPtr pkt)
	Check the list of buffered packets against the supplied functional request.

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

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

virtual	~ResponsePort ()

bool	isSnooping () const
	Find out if the peer request port is snooping or not.

void	sendRangeChange () const
	Called by the owner to send a range change.

void	unbind () override
	We let the request port do the work, so these don't do anything.

void	bind (Port &peer) override
	Attach to a peer port.

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

void	sendFunctionalSnoop (PacketPtr pkt) const
	Send a functional snoop 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.

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

void	sendTimingSnoopReq (PacketPtr pkt)
	Attempt to send a timing snoop request packet to the request port by calling its corresponding receive function.

void	sendRetryReq ()
	Send a retry to the request port that previously attempted a sendTimingReq to this response port and failed.

void	sendRetrySnoopResp ()
	Send a retry to the request port that previously attempted a sendTimingSnoopResp to this response 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	recvTimingReq (PacketPtr pkt) override
	Receive a timing request from the peer.

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

Tick	recvAtomic (PacketPtr pkt) override
	Receive an atomic request packet from the peer.

Tick	recvAtomicBackdoor (PacketPtr pkt, MemBackdoorPtr &backdoor) override
	Receive an atomic request packet from the peer, and optionally provide a backdoor to the data being accessed.

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

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

AddrRangeList	getAddrRanges () const override
	Get a list of the non-overlapping address ranges the owner is responsible for.

Protected Member Functions inherited from gem5::QueuedResponsePort
void	recvRespRetry ()
	Called by the peer if sendTimingResp was called on this protocol (causing recvTimingResp to be called on the peer) and was unsuccessful.

Protected Member Functions inherited from gem5::ResponsePort
void	responderUnbind ()
	Called by the request port to unbind.

void	responderBind (RequestPort &request_port)
	Called by the request port to bind.

Tick	recvAtomicBackdoor (PacketPtr pkt, MemBackdoorPtr &backdoor) override
	Default implementations.

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

bool	tryTiming (PacketPtr pkt) override
	Availability request from the peer.

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

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::AtomicResponseProtocol
Tick	sendSnoop (AtomicRequestProtocol *peer, PacketPtr pkt)
	Send an atomic snoop request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses.

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

void	sendSnoopReq (TimingRequestProtocol *peer, PacketPtr pkt)
	Attempt to send a timing snoop request packet to the peer by calling its corresponding receive function.

void	sendRetryReq (TimingRequestProtocol *peer)
	Send a retry to the peer that previously attempted a sendTimingReq to this protocol and failed.

void	sendRetrySnoopResp (TimingRequestProtocol *peer)
	Send a retry to the peer that previously attempted a sendTimingSnoopResp to this peer and failed.

Protected Member Functions inherited from gem5::FunctionalResponseProtocol
void	sendSnoop (FunctionalRequestProtocol *peer, PacketPtr pkt) const
	Send a functional snoop 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.

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

RespPacketQueue	queue
	A normal packet queue used to store responses.

Additional Inherited Members
Protected Attributes inherited from gem5::QueuedResponsePort
RespPacketQueue &	respQueue
	Packet queue used to store outgoing responses.

Protected Attributes inherited from gem5::ResponsePort
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 CPU-side port type, one will be instantiated for each of the mem_side_ports connecting to the crossbar.

Definition at line 88 of file coherent_xbar.hh.

Constructor & Destructor Documentation

◆ CoherentXBarResponsePort()

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

inline

Definition at line 101 of file coherent_xbar.hh.

Member Function Documentation

◆ getAddrRanges()

AddrRangeList gem5::CoherentXBar::CoherentXBarResponsePort::getAddrRanges ( ) const

inlineoverrideprotectedvirtual

Get a list of the non-overlapping address ranges the owner is responsible for.

All response ports must override this function and return a populated list with at least one item.

Returns: a list of ranges responded to

Implements gem5::ResponsePort.

Definition at line 147 of file coherent_xbar.hh.

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

◆ recvAtomic()

Tick gem5::CoherentXBar::CoherentXBarResponsePort::recvAtomic ( PacketPtr pkt )

inlineoverrideprotectedvirtual

Receive an atomic request packet from the peer.

Implements gem5::AtomicResponseProtocol.

Definition at line 122 of file coherent_xbar.hh.

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

◆ recvAtomicBackdoor()

Tick gem5::CoherentXBar::CoherentXBarResponsePort::recvAtomicBackdoor	(	PacketPtr	pkt,
		MemBackdoorPtr &	backdoor )

inlineoverrideprotectedvirtual

Receive an atomic request packet from the peer, and optionally provide a backdoor to the data being accessed.

Implements gem5::AtomicResponseProtocol.

Definition at line 128 of file coherent_xbar.hh.

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

◆ recvFunctional()

void gem5::CoherentXBar::CoherentXBarResponsePort::recvFunctional ( PacketPtr pkt )

inlineoverrideprotectedvirtual

Receive a functional request packet from the peer.

Implements gem5::FunctionalResponseProtocol.

Definition at line 134 of file coherent_xbar.hh.

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

◆ recvMemBackdoorReq()

void gem5::CoherentXBar::CoherentXBarResponsePort::recvMemBackdoorReq	(	const MemBackdoorReq &	req,
		MemBackdoorPtr &	backdoor )

inlineoverrideprotectedvirtual

Receive a request for a back door to a range of memory.

Parameters

req	An object which describes what back door is being requested.
backdoor	Can be set to a back door pointer by the target to let caller have direct access to the requested range.

Implements gem5::FunctionalResponseProtocol.

Definition at line 140 of file coherent_xbar.hh.

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