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< * Source port identifier set on a request packet to enable
< * appropriate routing of the responses. The source port
< * identifier is set by any multiplexing component, e.g. a
< * crossbar, as the timing responses need this information to be
< * routed back to the appropriate port at a later point in
< * time. The field can be updated (over-written) as the request
< * packet passes through additional multiplexing components, and
< * it is their responsibility to remember the original source port
< * identifier, for example by using an appropriate sender
< * state. The latter is done in the cache and bridge.
< */
< PortID src;
<
< /**
< * Destination port identifier that is present on all response
< * packets that passed through a multiplexing component as a
< * request packet. The source port identifier is turned into a
< * destination port identifier when the packet is turned into a
< * response, and the destination is used, e.g. by the crossbar, to
< * select the appropriate path through the interconnect.
< */
< PortID dest;
<
< /**
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< /// Accessor function to get the source index of the packet.
< PortID getSrc() const { return src; }
< /// Accessor function to set the source index of the packet.
< void setSrc(PortID _src) { src = _src; }
<
< /// Accessor function for the destination index of the packet.
< PortID getDest() const { return dest; }
< /// Accessor function to set the destination index of the packet.
< void setDest(PortID _dest) { dest = _dest; }
< /// Reset destination field, e.g. to turn a response into a request again.
< void clearDest() { dest = InvalidPortID; }
<
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< size(0), src(InvalidPortID), dest(InvalidPortID),
< bytesValidStart(0), bytesValidEnd(0),
---
> size(0), bytesValidStart(0), bytesValidEnd(0),
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< src(InvalidPortID), dest(InvalidPortID),
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< src(pkt->src), dest(pkt->dest),
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< * returning as a response to that request. The source field is
< * turned into the destination, and subsequently cleared. Note
< * that the latter is not necessary for atomic requests, but
< * causes no harm as neither field is valid.
---
> * returning as a response to that request.
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<
< dest = src;
< src = InvalidPortID;