The port on the side that receives requests and sends responses. More...

#include <serial_link.hh>

Inheritance diagram for SerialLink::SerialLinkSlavePort:

Public Member Functions
	SerialLinkSlavePort (const std::string &_name, SerialLink &_serial_link, SerialLinkMasterPort &_masterPort, Cycles _delay, int _resp_limit, const std::vector< AddrRange > &_ranges)
	Constructor for the SerialLinkSlavePort. More...

void	schedTimingResp (PacketPtr pkt, Tick when)
	Queue a response packet to be sent out later and also schedule a send if necessary. More...

void	retryStalledReq ()
	Retry any stalled request that we have failed to accept at an earlier point in time. More...

Public Member Functions inherited from SlavePort
	SlavePort (const std::string &name, SimObject *_owner, PortID id=InvalidPortID)
	Slave port. More...

virtual	~SlavePort ()

bool	isSnooping () const
	Find out if the peer master port is snooping or not. More...

void	sendRangeChange () const
	Called by the owner to send a range change. More...

void	unbind () override
	We let the master port do the work, so these don't do anything. More...

void	bind (Port &peer) override
	Attach to a peer port. More...

Tick	sendAtomicSnoop (PacketPtr pkt)
	Send an atomic snoop request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses. More...

void	sendFunctionalSnoop (PacketPtr pkt) const
	Send a functional snoop 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	sendTimingResp (PacketPtr pkt)
	Attempt to send a timing response to the master port by calling its corresponding receive function. More...

void	sendTimingSnoopReq (PacketPtr pkt)
	Attempt to send a timing snoop request packet to the master port by calling its corresponding receive function. More...

void	sendRetryReq ()
	Send a retry to the master port that previously attempted a sendTimingReq to this slave port and failed. More...

void	sendRetrySnoopResp ()
	Send a retry to the master port that previously attempted a sendTimingSnoopResp to this slave port and failed. More...

Public Member Functions inherited from 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
bool	recvTimingReq (PacketPtr pkt)
	When receiving a timing request from the peer port, pass it to the serial_link. More...

void	recvRespRetry ()
	When receiving a retry request from the peer port, pass it to the serial_link. More...

Tick	recvAtomic (PacketPtr pkt)
	When receiving a Atomic requestfrom the peer port, pass it to the serial_link. More...

void	recvFunctional (PacketPtr pkt)
	When receiving a Functional request from the peer port, pass it to the serial_link. More...

AddrRangeList	getAddrRanges () const
	When receiving a address range request the peer port, pass it to the serial_link. More...

Protected Member Functions inherited from SlavePort
void	slaveUnbind ()
	Called by the master port to unbind. More...

void	slaveBind (MasterPort &master_port)
	Called by the master port to bind. More...

Tick	recvAtomicBackdoor (PacketPtr pkt, MemBackdoorPtr &backdoor) override
	Default implementations. More...

bool	tryTiming (PacketPtr pkt) override
	Availability request from the peer. More...

bool	recvTimingSnoopResp (PacketPtr pkt) override
	Receive a timing snoop response from the peer. More...

Protected Member Functions inherited from Port
	Port (const std::string &_name, PortID _id)
	Abstract base class for ports. More...

Protected Member Functions inherited from AtomicResponseProtocol
Tick	sendSnoop (AtomicRequestProtocol *peer, PacketPtr pkt)
	Send an atomic snoop request packet, where the data is moved and the state is updated in zero time, without interleaving with other memory accesses. More...

Protected Member Functions inherited from TimingResponseProtocol
bool	sendResp (TimingRequestProtocol *peer, PacketPtr pkt)
	Attempt to send a timing response to the peer by calling its corresponding receive function. More...

void	sendSnoopReq (TimingRequestProtocol *peer, PacketPtr pkt)
	Attempt to send a timing snoop request packet to the peer by calling its corresponding receive function. More...

void	sendRetryReq (TimingRequestProtocol *peer)
	Send a retry to the peer that previously attempted a sendTimingReq to this protocol and failed. More...

void	sendRetrySnoopResp (TimingRequestProtocol *peer)
	Send a retry to the peer that previously attempted a sendTimingSnoopResp to this peer and failed. More...

Protected Member Functions inherited from FunctionalResponseProtocol
void	sendSnoop (FunctionalRequestProtocol *peer, PacketPtr pkt) const
	Send a functional snoop 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...

Private Member Functions
bool	respQueueFull () const
	Is this side blocked from accepting new response packets. More...

void	trySendTiming ()
	Handle send event, scheduled when the packet at the head of the response queue is ready to transmit (for timing accesses only). More...

Private Attributes
SerialLink &	serial_link
	The serial_link to which this port belongs. More...

SerialLinkMasterPort &	masterPort
	Master port on the other side of the serial_link. More...

const Cycles	delay
	Minimum request delay though this serial_link. More...

const AddrRangeList	ranges
	Address ranges to pass through the serial_link. More...

std::deque< DeferredPacket >	transmitList
	Response packet queue. More...

unsigned int	outstandingResponses
	Counter to track the outstanding responses. More...

bool	retryReq
	If we should send a retry when space becomes available. More...

unsigned int	respQueueLimit
	Max queue size for reserved responses. More...

EventFunctionWrapper	sendEvent
	Send event for the response queue. More...

Additional Inherited Members
Protected Attributes inherited from SlavePort
SimObject &	owner

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 on the side that receives requests and sends responses.

The slave port has a set of address ranges that it is responsible for. The slave port also has a buffer for the responses not yet sent.

Definition at line 99 of file serial_link.hh.

Constructor & Destructor Documentation

◆ SerialLinkSlavePort()

SerialLink::SerialLinkSlavePort::SerialLinkSlavePort	(	const std::string &	_name,
		SerialLink &	_serial_link,
		SerialLinkMasterPort &	_masterPort,
		Cycles	_delay,
		int	_resp_limit,
		const std::vector< AddrRange > &	_ranges
	)

Constructor for the SerialLinkSlavePort.

Parameters

_name	the port name including the owner
_serial_link	the structural owner
_masterPort	the master port on the other side of the serial_link
_delay	the delay in cycles from receiving to sending
_resp_limit	the size of the response queue
_ranges	a number of address ranges to forward

Definition at line 59 of file serial_link.cc.

References trySendTiming().

Member Function Documentation

◆ getAddrRanges()

AddrRangeList SerialLink::SerialLinkSlavePort::getAddrRanges ( ) const

protectedvirtual

When receiving a address range request the peer port, pass it to the serial_link.

Implements SlavePort.

Definition at line 423 of file serial_link.cc.

References SerialLink::SerialLink().

◆ recvAtomic()

Tick SerialLink::SerialLinkSlavePort::recvAtomic ( PacketPtr pkt )

protectedvirtual

When receiving a Atomic requestfrom the peer port, pass it to the serial_link.

Implements AtomicResponseProtocol.

Definition at line 376 of file serial_link.cc.

References SerialLink::masterPort, and MasterPort::sendAtomic().

◆ recvFunctional()

void SerialLink::SerialLinkSlavePort::recvFunctional ( PacketPtr pkt )

protectedvirtual

When receiving a Functional request from the peer port, pass it to the serial_link.

Implements FunctionalResponseProtocol.

Definition at line 382 of file serial_link.cc.

References ArmISA::i, Packet::makeResponse(), SerialLink::masterPort, SimObject::name(), Packet::popLabel(), Packet::pushLabel(), MasterPort::sendFunctional(), SerialLink::SerialLinkMasterPort::trySatisfyFunctional(), and Packet::trySatisfyFunctional().

◆ recvRespRetry()

void SerialLink::SerialLinkSlavePort::recvRespRetry ( )

protectedvirtual

When receiving a retry request from the peer port, pass it to the serial_link.

Implements TimingResponseProtocol.

Definition at line 370 of file serial_link.cc.

◆ recvTimingReq()

bool SerialLink::SerialLinkSlavePort::recvTimingReq ( PacketPtr pkt )

protectedvirtual

When receiving a timing request from the peer port, pass it to the serial_link.

Implements TimingResponseProtocol.

Definition at line 165 of file serial_link.cc.

References Packet::cacheResponding(), Packet::cmdString(), divCeil(), DPRINTF, Packet::getAddr(), Packet::getSize(), Packet::headerDelay, SerialLink::masterPort, Packet::needsResponse(), Packet::payloadDelay, SerialLink::SerialLinkMasterPort::reqQueueFull(), SerialLink::SerialLinkMasterPort::schedTimingReq(), and ArmISA::t.

◆ respQueueFull()

bool SerialLink::SerialLinkSlavePort::respQueueFull ( ) const

private

Is this side blocked from accepting new response packets.

Returns: true if the reserved space has reached the set limit

Definition at line 120 of file serial_link.cc.

◆ retryStalledReq()

void SerialLink::SerialLinkSlavePort::retryStalledReq ( )

Retry any stalled request that we have failed to accept at an earlier point in time.

This call will do nothing if no request is waiting.

Definition at line 232 of file serial_link.cc.

References DPRINTF.

Referenced by SerialLink::SerialLinkMasterPort::trySendTiming().

◆ schedTimingResp()

void SerialLink::SerialLinkSlavePort::schedTimingResp	(	PacketPtr	pkt,
		Tick	when
	)

Queue a response packet to be sent out later and also schedule a send if necessary.

Parameters

pkt	a response to send out after a delay
when	tick when response packet should be sent

Definition at line 259 of file serial_link.cc.

References ArmISA::sendEvent().

Referenced by SerialLink::SerialLinkMasterPort::recvTimingResp().

◆ trySendTiming()

void SerialLink::SerialLinkSlavePort::trySendTiming ( )

private

Handle send event, scheduled when the packet at the head of the response queue is ready to transmit (for timing accesses only).

Definition at line 316 of file serial_link.cc.

References curTick(), divCeil(), DPRINTF, Packet::getAddr(), Packet::getSize(), SerialLink::masterPort, SerialLink::SerialLinkMasterPort::reqQueueFull(), ArmISA::sendEvent(), ArmISA::t, and SerialLink::DeferredPacket::tick.

Referenced by SerialLinkSlavePort().

Member Data Documentation

◆ delay

const Cycles SerialLink::SerialLinkSlavePort::delay

private

Minimum request delay though this serial_link.

Definition at line 113 of file serial_link.hh.

◆ masterPort

SerialLinkMasterPort& SerialLink::SerialLinkSlavePort::masterPort

private

Master port on the other side of the serial_link.

Definition at line 110 of file serial_link.hh.

◆ outstandingResponses

unsigned int SerialLink::SerialLinkSlavePort::outstandingResponses

private

Counter to track the outstanding responses.

Definition at line 127 of file serial_link.hh.

◆ ranges

const AddrRangeList SerialLink::SerialLinkSlavePort::ranges

private

Address ranges to pass through the serial_link.

Definition at line 116 of file serial_link.hh.

◆ respQueueLimit

unsigned int SerialLink::SerialLinkSlavePort::respQueueLimit

private

Max queue size for reserved responses.

Definition at line 133 of file serial_link.hh.

◆ retryReq

bool SerialLink::SerialLinkSlavePort::retryReq

private

If we should send a retry when space becomes available.

Definition at line 130 of file serial_link.hh.

◆ sendEvent

EventFunctionWrapper SerialLink::SerialLinkSlavePort::sendEvent

private

Send event for the response queue.

Definition at line 150 of file serial_link.hh.

◆ serial_link

SerialLink& SerialLink::SerialLinkSlavePort::serial_link

private

The serial_link to which this port belongs.

Definition at line 105 of file serial_link.hh.

◆ transmitList

std::deque<DeferredPacket> SerialLink::SerialLinkSlavePort::transmitList

private

Response packet queue.

Response packets are held in this queue for a specified delay to model the processing delay of the serial_link. We use a deque as we need to iterate over the items for functional accesses.

Definition at line 124 of file serial_link.hh.

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

mem/serial_link.hh
mem/serial_link.cc

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SerialLinkSlavePort()

Member Function Documentation

◆ getAddrRanges()

◆ recvAtomic()

◆ recvFunctional()

◆ recvRespRetry()

◆ recvTimingReq()

◆ respQueueFull()

◆ retryStalledReq()

◆ schedTimingResp()

◆ trySendTiming()

Member Data Documentation

◆ delay

◆ masterPort

◆ outstandingResponses

◆ ranges

◆ respQueueLimit

◆ retryReq

◆ sendEvent

◆ serial_link

◆ transmitList