gem5  v20.1.0.0
Classes | Public Member Functions | Public Attributes | Protected Member Functions | Protected Attributes | List of all members
ComputeUnit::LDSPort Class Reference

the port intended to communicate between the CU and its LDS More...

#include <compute_unit.hh>

Inheritance diagram for ComputeUnit::LDSPort:
RequestPort Port AtomicRequestProtocol TimingRequestProtocol FunctionalRequestProtocol

Classes

class  SenderState
 SenderState is information carried along with the packet, esp. More...
 

Public Member Functions

 LDSPort (const std::string &_name, ComputeUnit *_cu)
 
bool isStalled () const
 
void stallPort ()
 
void unstallPort ()
 
virtual bool sendTimingReq (PacketPtr pkt)
 attempt to send this packet, either the port is already stalled, the request is nack'd and must stall or the request goes through when a request cannot be sent, add it to the retries queue More...
 
- Public Member Functions inherited from 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 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

std::queue< PacketPtrretries
 here we queue all the requests that were not successfully sent. More...
 

Protected Member Functions

virtual bool recvTimingResp (PacketPtr pkt)
 get the result of packets sent to the LDS when they return 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 ()
 the bus is telling the port that there is now space so retrying stalled requests should work now this allows the port to have a request be nack'd and then have the receiver say when there is space, rather than simply retrying the send every cycle More...
 
- Protected Member Functions inherited from 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 Port
void reportUnbound () const
 
 Port (const std::string &_name, PortID _id)
 Abstract base class for ports. More...
 
- Protected Member Functions inherited from 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 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 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

bool stalled = false
 whether or not it is stalled More...
 
ComputeUnitcomputeUnit
 
- Protected Attributes inherited from RequestPort
SimObjectowner
 
- Protected Attributes inherited from 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

the port intended to communicate between the CU and its LDS

Definition at line 905 of file compute_unit.hh.

Constructor & Destructor Documentation

◆ LDSPort()

ComputeUnit::LDSPort::LDSPort ( const std::string &  _name,
ComputeUnit _cu 
)
inline

Definition at line 908 of file compute_unit.hh.

Member Function Documentation

◆ isStalled()

bool ComputeUnit::LDSPort::isStalled ( ) const
inline

Definition at line 913 of file compute_unit.hh.

References stalled.

◆ recvAtomic()

virtual Tick ComputeUnit::LDSPort::recvAtomic ( PacketPtr  pkt)
inlineprotectedvirtual

Definition at line 959 of file compute_unit.hh.

◆ recvFunctional()

virtual void ComputeUnit::LDSPort::recvFunctional ( PacketPtr  pkt)
inlineprotectedvirtual

Definition at line 962 of file compute_unit.hh.

◆ recvRangeChange()

virtual void ComputeUnit::LDSPort::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 RequestPort.

Definition at line 967 of file compute_unit.hh.

◆ recvReqRetry()

void ComputeUnit::LDSPort::recvReqRetry ( )
protectedvirtual

the bus is telling the port that there is now space so retrying stalled requests should work now this allows the port to have a request be nack'd and then have the receiver say when there is space, rather than simply retrying the send every cycle

Implements TimingRequestProtocol.

Definition at line 2623 of file compute_unit.cc.

References DPRINTF, fatal_if, and RequestPort::sendTimingReq().

◆ recvTimingResp()

bool ComputeUnit::LDSPort::recvTimingResp ( PacketPtr  pkt)
protectedvirtual

get the result of packets sent to the LDS when they return

Implements TimingRequestProtocol.

Definition at line 2559 of file compute_unit.cc.

References fatal_if, ComputeUnit::LDSPort::SenderState::getMemInst(), and Packet::senderState.

◆ sendTimingReq()

bool ComputeUnit::LDSPort::sendTimingReq ( PacketPtr  pkt)
virtual

attempt to send this packet, either the port is already stalled, the request is nack'd and must stall or the request goes through when a request cannot be sent, add it to the retries queue

Definition at line 2581 of file compute_unit.cc.

References DPRINTF, fatal_if, ComputeUnit::LDSPort::SenderState::getMemInst(), Packet::req, Packet::senderState, and RequestPort::sendTimingReq().

Referenced by ComputeUnit::sendToLds().

◆ stallPort()

void ComputeUnit::LDSPort::stallPort ( )
inline

Definition at line 914 of file compute_unit.hh.

References stalled.

◆ unstallPort()

void ComputeUnit::LDSPort::unstallPort ( )
inline

Definition at line 915 of file compute_unit.hh.

References stalled.

Member Data Documentation

◆ computeUnit

ComputeUnit* ComputeUnit::LDSPort::computeUnit
protected

Definition at line 953 of file compute_unit.hh.

◆ retries

std::queue<PacketPtr> ComputeUnit::LDSPort::retries

here we queue all the requests that were not successfully sent.

Definition at line 921 of file compute_unit.hh.

◆ stalled

bool ComputeUnit::LDSPort::stalled = false
protected

whether or not it is stalled

Definition at line 951 of file compute_unit.hh.

Referenced by isStalled(), stallPort(), and unstallPort().


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

Generated on Wed Sep 30 2020 14:02:22 for gem5 by doxygen 1.8.17