A cache request port is used for the memory-side port of the cache, and in addition to the basic timing port that only sends response packets through a transmit list, it also offers the ability to schedule and send request packets (requests & writebacks). More...
#include <base.hh>
Inheritance diagram for gem5::BaseCache::CacheRequestPort:
Public Member Functions | |
| void | schedSendEvent (Tick time) |
| Schedule a send of a request packet (from the MSHR). More... | |
 Public Member Functions inherited from gem5::QueuedRequestPort | |
| QueuedRequestPort (const std::string &name, SimObject *owner, ReqPacketQueue &req_queue, SnoopRespPacketQueue &snoop_resp_queue, PortID id=InvalidPortID) | |
| Create a QueuedPort with a given name, owner, and a supplied implementation of two packet queues. More... | |
| virtual | ~QueuedRequestPort () |
| void | schedTimingReq (PacketPtr pkt, Tick when) |
| Schedule the sending of a timing request. More... | |
| void | schedTimingSnoopResp (PacketPtr pkt, Tick when) |
| Schedule the sending of a timing snoop response. More... | |
| bool | trySatisfyFunctional (PacketPtr pkt) |
| Check the list of buffered packets against the supplied functional request. 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... | |
| 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... | |
| Port & | getPeer () |
| 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... | |
Protected Member Functions | |
| CacheRequestPort (const std::string &_name, BaseCache *_cache, ReqPacketQueue &_reqQueue, SnoopRespPacketQueue &_snoopRespQueue) | |
| virtual bool | isSnooping () const |
| Memory-side port always snoops. More... | |
| Protected Member Functions inherited from gem5::QueuedRequestPort | |
| 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... | |
| void | recvRetrySnoopResp () |
| 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::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... | |
| 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... | |
| virtual bool | recvTimingResp (PacketPtr pkt)=0 |
| Receive a timing response from the peer. 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... | |
Additional Inherited Members | |
| Protected Attributes inherited from gem5::QueuedRequestPort | |
| ReqPacketQueue & | reqQueue |
| Packet queue used to store outgoing requests. More... | |
| SnoopRespPacketQueue & | snoopRespQueue |
| Packet queue used to store outgoing snoop responses. More... | |
| 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. 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
A cache request port is used for the memory-side port of the cache, and in addition to the basic timing port that only sends response packets through a transmit list, it also offers the ability to schedule and send request packets (requests & writebacks).
The send event is scheduled through schedSendEvent, and the sendDeferredPacket of the timing port is modified to consider both the transmit list and the requests from the MSHR.
Constructor & Destructor Documentation
◆ CacheRequestPort()
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inlineprotected |
Member Function Documentation
◆ isSnooping()
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inlineprotectedvirtual |
◆ schedSendEvent()
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inline |
Schedule a send of a request packet (from the MSHR).
Note that we could already have a retry outstanding.
Definition at line 161 of file base.hh.
References DPRINTF, gem5::QueuedRequestPort::reqQueue, and gem5::PacketQueue::schedSendEvent().
Referenced by gem5::BaseCache::schedMemSideSendEvent().
The documentation for this class was generated from the following file:
- mem/cache/base.hh