Port on the side that forwards requests and receives responses. More...

#include <bridge.hh>

Inheritance diagram for Bridge::BridgeMasterPort:

Public Member Functions
	BridgeMasterPort (const std::string &_name, Bridge &_bridge, BridgeSlavePort &_slavePort, Cycles _delay, int _req_limit)
	Constructor for the BridgeMasterPort. More...

bool	reqQueueFull () const
	Is this side blocked from accepting new request packets. More...

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

bool	checkFunctional (PacketPtr pkt)
	Check a functional request against the packets in our request queue. More...

Public Member Functions inherited from MasterPort
	MasterPort (const std::string &name, MemObject *owner, PortID id=InvalidPortID)
	Master port. More...

virtual	~MasterPort ()

void	bind (BaseSlavePort &slave_port)
	Bind this master port to a slave port. More...

void	unbind ()
	Unbind this master port and the associated slave port. 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...

void	sendFunctional (PacketPtr pkt)
	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 slave port by calling its corresponding receive function. More...

bool	sendTimingSnoopResp (PacketPtr pkt)
	Attempt to send a timing snoop response packet to the slave port by calling its corresponding receive function. More...

virtual void	sendRetryResp ()
	Send a retry to the slave port that previously attempted a sendTimingResp to this master port and failed. More...

virtual bool	isSnooping () const
	Determine if this master port is snooping or not. More...

AddrRangeList	getAddrRanges () const
	Get the address ranges of the connected slave 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...

Public Member Functions inherited from BaseMasterPort
BaseSlavePort &	getSlavePort () const

bool	isConnected () const

Public Member Functions inherited from Port
const std::string	name () const
	Return port name (for DPRINTF). More...

PortID	getId () const
	Get the port id. More...

Protected Member Functions
bool	recvTimingResp (PacketPtr pkt)
	When receiving a timing request from the peer port, pass it to the bridge. More...

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

Protected Member Functions inherited from MasterPort
virtual Tick	recvAtomicSnoop (PacketPtr pkt)
	Receive an atomic snoop request packet from the slave port. More...

virtual void	recvFunctionalSnoop (PacketPtr pkt)
	Receive a functional snoop request packet from the slave port. More...

virtual void	recvTimingSnoopReq (PacketPtr pkt)
	Receive a timing snoop request from the slave port. More...

virtual void	recvRetrySnoopResp ()
	Called by the slave port if sendTimingSnoopResp was called on this master port (causing recvTimingSnoopResp to be called on the slave port) and was unsuccesful. More...

virtual void	recvRangeChange ()
	Called to receive an address range change from the peer slave port. More...

Protected Member Functions inherited from BaseMasterPort
	BaseMasterPort (const std::string &name, MemObject *owner, PortID id=InvalidPortID)

virtual	~BaseMasterPort ()

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

virtual	~Port ()
	Virtual destructor due to inheritance. More...

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

Private Attributes
Bridge &	bridge
	The bridge to which this port belongs. More...

BridgeSlavePort &	slavePort
	The slave port on the other side of the bridge. More...

const Cycles	delay
	Minimum delay though this bridge. More...

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

const unsigned int	reqQueueLimit
	Max queue size for request packets. More...

EventWrapper< BridgeMasterPort,&BridgeMasterPort::trySendTiming >	sendEvent
	Send event for the request queue. More...

Additional Inherited Members
Protected Attributes inherited from BaseMasterPort
BaseSlavePort *	_baseSlavePort

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...

MemObject &	owner
	A reference to the MemObject that owns this port. More...

Detailed Description

Port on the side that forwards requests and receives responses.

The master port has a buffer for the requests not yet sent.

Definition at line 223 of file bridge.hh.

Constructor & Destructor Documentation

Bridge::BridgeMasterPort::BridgeMasterPort	(	const std::string &	_name,
		Bridge &	_bridge,
		BridgeSlavePort &	_slavePort,
		Cycles	_delay,
		int	_req_limit
	)

Constructor for the BridgeMasterPort.

Parameters

_name	the port name including the owner
_bridge	the structural owner
_slavePort	the slave port on the other side of the bridge
_delay	the delay in cycles from receiving to sending
_req_limit	the size of the request queue

Definition at line 69 of file bridge.cc.

Member Function Documentation

bool Bridge::BridgeMasterPort::checkFunctional ( PacketPtr pkt )

Check a functional request against the packets in our request queue.

Parameters

pkt	packet to check against

Returns: true if we find a match

Definition at line 381 of file bridge.cc.

References Packet::checkFunctional(), ArmISA::i, and Packet::makeResponse().

Referenced by Bridge::BridgeSlavePort::recvFunctional().

void Bridge::BridgeMasterPort::recvReqRetry ( )

protectedvirtual

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

Implements MasterPort.

Definition at line 336 of file bridge.cc.

bool Bridge::BridgeMasterPort::recvTimingResp ( PacketPtr pkt )

protectedvirtual

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

Implements MasterPort.

Definition at line 131 of file bridge.cc.

References Packet::cmdString(), DPRINTF, Packet::getAddr(), Packet::headerDelay, Packet::payloadDelay, Bridge::BridgeSlavePort::schedTimingResp(), and Bridge::slavePort.

bool Bridge::BridgeMasterPort::reqQueueFull ( ) const

Is this side blocked from accepting new request packets.

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

Definition at line 125 of file bridge.cc.

Referenced by Bridge::BridgeSlavePort::recvTimingReq(), and Bridge::BridgeSlavePort::trySendTiming().

void Bridge::BridgeMasterPort::schedTimingReq	(	PacketPtr	pkt,
		Tick	when
	)

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

Parameters

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

Definition at line 223 of file bridge.cc.

Referenced by Bridge::BridgeSlavePort::recvTimingReq().

void Bridge::BridgeMasterPort::trySendTiming ( )

private

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

Definition at line 254 of file bridge.cc.

References curTick(), DPRINTF, Packet::getAddr(), Bridge::BridgeSlavePort::retryStalledReq(), Bridge::slavePort, and Bridge::DeferredPacket::tick.

Member Data Documentation

Bridge& Bridge::BridgeMasterPort::bridge

private

The bridge to which this port belongs.

Definition at line 229 of file bridge.hh.

const Cycles Bridge::BridgeMasterPort::delay

private

Minimum delay though this bridge.

Definition at line 237 of file bridge.hh.

const unsigned int Bridge::BridgeMasterPort::reqQueueLimit

private

Max queue size for request packets.

Definition at line 248 of file bridge.hh.

EventWrapper<BridgeMasterPort, &BridgeMasterPort::trySendTiming> Bridge::BridgeMasterPort::sendEvent

private

Send event for the request queue.

Definition at line 259 of file bridge.hh.

BridgeSlavePort& Bridge::BridgeMasterPort::slavePort

private

The slave port on the other side of the bridge.

Definition at line 234 of file bridge.hh.

std::deque<DeferredPacket> Bridge::BridgeMasterPort::transmitList

private

Request packet queue.

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

Definition at line 245 of file bridge.hh.

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

mem/bridge.hh
mem/bridge.cc

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation