gem5  v21.1.0.2
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gem5::ComputeUnit::DataPort Class Reference

Data access Port. More...

#include <compute_unit.hh>

Inheritance diagram for gem5::ComputeUnit::DataPort:
gem5::RequestPort gem5::Port gem5::AtomicRequestProtocol gem5::TimingRequestProtocol gem5::FunctionalRequestProtocol

Classes

struct  SenderState
 

Public Member Functions

 DataPort (const std::string &_name, ComputeUnit *_cu, PortID id)
 
void processMemReqEvent (PacketPtr pkt)
 
EventFunctionWrappercreateMemReqEvent (PacketPtr pkt)
 
void processMemRespEvent (PacketPtr pkt)
 
EventFunctionWrappercreateMemRespEvent (PacketPtr pkt)
 
- 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...
 
virtual void sendRetryResp ()
 Send a retry to the response port that previously attempted a sendTimingResp to this request port and failed. 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...
 

Public Attributes

bool snoopRangeSent
 
std::deque< std::pair< PacketPtr, GPUDynInstPtr > > retries
 

Protected Member Functions

virtual bool recvTimingResp (PacketPtr pkt)
 Receive a timing response from the peer. More...
 
virtual Tick recvAtomic (PacketPtr pkt)
 
virtual void recvFunctional (PacketPtr pkt)
 
virtual void recvRangeChange ()
 Called to receive an address range change from the peer response port. More...
 
virtual void recvReqRetry ()
 Called by the peer if sendTimingReq was called on this peer (causing recvTimingReq to be called on the peer) and was unsuccessful. More...
 
virtual void getDeviceAddressRanges (AddrRangeList &resp, bool &snoop)
 
- Protected Member Functions inherited from gem5::RequestPort
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

ComputeUnitcomputeUnit
 
- 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

Data access Port.

Definition at line 510 of file compute_unit.hh.

Constructor & Destructor Documentation

◆ DataPort()

gem5::ComputeUnit::DataPort::DataPort ( const std::string &  _name,
ComputeUnit _cu,
PortID  id 
)
inline

Definition at line 513 of file compute_unit.hh.

Member Function Documentation

◆ createMemReqEvent()

EventFunctionWrapper * gem5::ComputeUnit::DataPort::createMemReqEvent ( PacketPtr  pkt)

Definition at line 1557 of file compute_unit.cc.

◆ createMemRespEvent()

EventFunctionWrapper * gem5::ComputeUnit::DataPort::createMemRespEvent ( PacketPtr  pkt)

Definition at line 1565 of file compute_unit.cc.

◆ getDeviceAddressRanges()

virtual void gem5::ComputeUnit::DataPort::getDeviceAddressRanges ( AddrRangeList resp,
bool &  snoop 
)
inlineprotectedvirtual

Definition at line 549 of file compute_unit.hh.

◆ processMemReqEvent()

void gem5::ComputeUnit::DataPort::processMemReqEvent ( PacketPtr  pkt)

◆ processMemRespEvent()

void gem5::ComputeUnit::DataPort::processMemRespEvent ( PacketPtr  pkt)

◆ recvAtomic()

virtual Tick gem5::ComputeUnit::DataPort::recvAtomic ( PacketPtr  pkt)
inlineprotectedvirtual

Definition at line 543 of file compute_unit.hh.

◆ recvFunctional()

virtual void gem5::ComputeUnit::DataPort::recvFunctional ( PacketPtr  pkt)
inlineprotectedvirtual

Definition at line 544 of file compute_unit.hh.

◆ recvRangeChange()

virtual void gem5::ComputeUnit::DataPort::recvRangeChange ( )
inlineprotectedvirtual

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 545 of file compute_unit.hh.

◆ recvReqRetry()

void gem5::ComputeUnit::DataPort::recvReqRetry ( )
protectedvirtual

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

Currently Ruby can return false due to conflicts for the particular cache block or address. Thus other requests should be allowed to pass and the data port should expect multiple retries.

Implements gem5::TimingRequestProtocol.

Definition at line 954 of file compute_unit.cc.

References DPRINTF, gem5::ArmISA::i, gem5::ArmISA::len, and gem5::Packet::req.

◆ recvTimingResp()

bool gem5::ComputeUnit::DataPort::recvTimingResp ( PacketPtr  pkt)
protectedvirtual

Member Data Documentation

◆ computeUnit

ComputeUnit* gem5::ComputeUnit::DataPort::computeUnit
protected

Definition at line 540 of file compute_unit.hh.

Referenced by recvTimingResp().

◆ retries

std::deque<std::pair<PacketPtr, GPUDynInstPtr> > gem5::ComputeUnit::DataPort::retries

Definition at line 537 of file compute_unit.hh.

◆ snoopRangeSent

bool gem5::ComputeUnit::DataPort::snoopRangeSent

Definition at line 516 of file compute_unit.hh.


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

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