Port on the memory-side that receives responses. More...

Inheritance diagram for gem5::SimpleMemobj::MemSidePort:

Public Member Functions
	MemSidePort (const std::string &name, SimpleMemobj *owner)
	Constructor.

void	sendPacket (PacketPtr pkt)
	Send a packet across this port.

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.

virtual bool	isSnooping () const
	Determine if this request port is snooping or not.

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

void	recvReqRetry () override
	Called by the response port if sendTimingReq was called on this request port (causing recvTimingReq to be called on the responder port) and was unsuccesful.

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

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
SimpleMemobj *	owner
	The object that owns this object (SimpleMemobj)

PacketPtr	blockedPacket
	If we tried to send a packet and it was blocked, store it here.

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

Port on the memory-side that receives responses.

Mostly just forwards requests to the owner

Definition at line 136 of file simple_memobj.hh.

Constructor & Destructor Documentation

◆ MemSidePort()

gem5::SimpleMemobj::MemSidePort::MemSidePort	(	const std::string &	name,
		SimpleMemobj *	owner )

inline

Constructor.

Just calls the superclass constructor.

Definition at line 149 of file simple_memobj.hh.

References blockedPacket, gem5::Port::name(), owner, gem5::RequestPort::RequestPort(), and gem5::SimpleMemobj::SimpleMemobj().

Member Function Documentation

◆ recvRangeChange()

void gem5::SimpleMemobj::MemSidePort::recvRangeChange ( )

overrideprotectedvirtual

Called to receive an address range change from the peer responder 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 162 of file simple_memobj.cc.

References owner.

◆ recvReqRetry()

void gem5::SimpleMemobj::MemSidePort::recvReqRetry ( )

overrideprotectedvirtual

Called by the response port if sendTimingReq was called on this request port (causing recvTimingReq to be called on the responder port) and was unsuccesful.

Implements gem5::TimingRequestProtocol.

Definition at line 148 of file simple_memobj.cc.

References blockedPacket, and sendPacket().

◆ recvTimingResp()

bool gem5::SimpleMemobj::MemSidePort::recvTimingResp ( PacketPtr pkt )

overrideprotectedvirtual

Receive a timing response from the response port.

Implements gem5::TimingRequestProtocol.

Definition at line 141 of file simple_memobj.cc.

References owner.

◆ sendPacket()

void gem5::SimpleMemobj::MemSidePort::sendPacket ( PacketPtr pkt )

Send a packet across this port.

This is called by the owner and all of the flow control is hanled in this function.

Parameters

packet to send.

Definition at line 128 of file simple_memobj.cc.

References blockedPacket, panic_if, and gem5::RequestPort::sendTimingReq().

Referenced by recvReqRetry().

Member Data Documentation

◆ blockedPacket

PacketPtr gem5::SimpleMemobj::MemSidePort::blockedPacket

private

If we tried to send a packet and it was blocked, store it here.

Definition at line 143 of file simple_memobj.hh.

Referenced by MemSidePort(), recvReqRetry(), and sendPacket().

◆ owner

SimpleMemobj* gem5::SimpleMemobj::MemSidePort::owner

private

The object that owns this object (SimpleMemobj)

Definition at line 140 of file simple_memobj.hh.

Referenced by MemSidePort(), recvRangeChange(), and recvTimingResp().

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

learning_gem5/part2/simple_memobj.hh
learning_gem5/part2/simple_memobj.cc

Public Member Functions

Protected Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ MemSidePort()

Member Function Documentation

◆ recvRangeChange()

◆ recvReqRetry()

◆ recvTimingResp()

◆ sendPacket()

Member Data Documentation

◆ blockedPacket

◆ owner