gem5  v21.1.0.2
Public Member Functions | Private Attributes | List of all members
gem5::CoherentXBar::SnoopRespPort Class Reference

Internal class to bridge between an incoming snoop response from a CPU-side port and forwarding it through an outgoing CPU-side port. More...

#include <coherent_xbar.hh>

Inheritance diagram for gem5::CoherentXBar::SnoopRespPort:
gem5::RequestPort gem5::Port gem5::AtomicRequestProtocol gem5::TimingRequestProtocol gem5::FunctionalRequestProtocol

Public Member Functions

 SnoopRespPort (QueuedResponsePort &cpu_side_port, CoherentXBar &_xbar)
 Create a snoop response port that mirrors a given CPU-side port. More...
 
void sendRetryResp () override
 Override the sending of retries and pass them on through the mirrored CPU-side port. More...
 
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. More...
 
bool recvTimingResp (PacketPtr pkt) override
 Receive a timing response from the peer. More...
 
- Public Member Functions inherited from gem5::RequestPort
 RequestPort (const std::string &name, SimObject *_owner, PortID id=InvalidPortID)
 Request port. More...
 
virtual ~RequestPort ()
 
void bind (Port &peer) override
 Bind this request port to a response port. More...
 
void unbind () override
 Unbind this request port and the associated response port. More...
 
virtual bool isSnooping () const
 Determine if this request port is snooping or not. More...
 
AddrRangeList getAddrRanges () const
 Get the address ranges of the connected responder port. More...
 
void printAddr (Addr a)
 Inject a PrintReq for the given address to print the state of that address throughout the memory system. More...
 
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. More...
 
Tick sendAtomicBackdoor (PacketPtr pkt, MemBackdoorPtr &backdoor)
 Send an atomic request packet like above, but also request a backdoor to the data being accessed. More...
 
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. More...
 
bool sendTimingReq (PacketPtr pkt)
 Attempt to send a timing request to the responder port by calling its corresponding receive function. More...
 
bool tryTiming (PacketPtr pkt) const
 Check if the responder can handle a timing request. More...
 
bool sendTimingSnoopResp (PacketPtr pkt)
 Attempt to send a timing snoop response packet to the response port by calling its corresponding receive function. More...
 
- Public Member Functions inherited from gem5::Port
virtual ~Port ()
 Virtual destructor due to inheritance. More...
 
PortgetPeer ()
 Return a reference to this port's peer. More...
 
const std::string name () const
 Return port name (for DPRINTF). More...
 
PortID getId () const
 Get the port id. More...
 
bool isConnected () const
 Is this port currently connected to a peer? More...
 
void takeOverFrom (Port *old)
 A utility function to make it easier to swap out ports. More...
 

Private Attributes

QueuedResponsePortcpuSidePort
 The port which we mirror internally. More...
 

Additional Inherited Members

- Protected Member Functions inherited from gem5::RequestPort
virtual void recvRangeChange ()
 Called to receive an address range change from the peer response port. More...
 
Tick recvAtomicSnoop (PacketPtr pkt) override
 Default implementations. More...
 
void recvFunctionalSnoop (PacketPtr pkt) override
 Receive a functional snoop request packet from the peer. More...
 
void recvTimingSnoopReq (PacketPtr pkt) override
 Receive a timing snoop request from the peer. More...
 
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. More...
 
- Protected Member Functions inherited from gem5::Port
void reportUnbound () const
 
 Port (const std::string &_name, PortID _id)
 Abstract base class for ports. More...
 
- 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. More...
 
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. More...
 
- 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. More...
 
bool trySend (TimingResponseProtocol *peer, PacketPtr pkt) const
 Check if the peer can handle a timing request. More...
 
bool sendSnoopResp (TimingResponseProtocol *peer, PacketPtr pkt)
 Attempt to send a timing snoop response packet to it's peer by calling its corresponding receive function. More...
 
void sendRetryResp (TimingResponseProtocol *peer)
 Send a retry to the peer that previously attempted a sendTimingResp to this protocol and failed. More...
 
- 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. More...
 
- Protected Attributes inherited from gem5::RequestPort
SimObjectowner
 
- 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. More...
 
Port_peer
 A pointer to this port's peer. More...
 
bool _connected
 Whether this port is currently connected to a peer port. More...
 

Detailed Description

Internal class to bridge between an incoming snoop response from a CPU-side port and forwarding it through an outgoing CPU-side port.

It is effectively a dangling memory-side port.

Definition at line 209 of file coherent_xbar.hh.

Constructor & Destructor Documentation

◆ SnoopRespPort()

gem5::CoherentXBar::SnoopRespPort::SnoopRespPort ( QueuedResponsePort cpu_side_port,
CoherentXBar _xbar 
)
inline

Create a snoop response port that mirrors a given CPU-side port.

Definition at line 222 of file coherent_xbar.hh.

Member Function Documentation

◆ recvReqRetry()

void gem5::CoherentXBar::SnoopRespPort::recvReqRetry ( )
inlineoverridevirtual

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

Implements gem5::TimingRequestProtocol.

Definition at line 239 of file coherent_xbar.hh.

References panic.

◆ recvTimingResp()

bool gem5::CoherentXBar::SnoopRespPort::recvTimingResp ( PacketPtr  pkt)
inlineoverridevirtual

Receive a timing response from the peer.

Implements gem5::TimingRequestProtocol.

Definition at line 245 of file coherent_xbar.hh.

References panic.

◆ sendRetryResp()

void gem5::CoherentXBar::SnoopRespPort::sendRetryResp ( )
inlineoverridevirtual

Override the sending of retries and pass them on through the mirrored CPU-side port.

Reimplemented from gem5::RequestPort.

Definition at line 232 of file coherent_xbar.hh.

References cpuSidePort, and gem5::ResponsePort::sendRetrySnoopResp().

Member Data Documentation

◆ cpuSidePort

QueuedResponsePort& gem5::CoherentXBar::SnoopRespPort::cpuSidePort
private

The port which we mirror internally.

Definition at line 215 of file coherent_xbar.hh.

Referenced by sendRetryResp().


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

Generated on Tue Sep 21 2021 12:27:24 for gem5 by doxygen 1.8.17