packet.hh (10567:926802ed1536) packet.hh (10569:ffd46545b284)
1/*
2 * Copyright (c) 2012-2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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260
261 public:
262 typedef MemCmd::Command Command;
263
264 /// The command field of the packet.
265 MemCmd cmd;
266
267 /// A pointer to the original request.
1/*
2 * Copyright (c) 2012-2014 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software

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260
261 public:
262 typedef MemCmd::Command Command;
263
264 /// The command field of the packet.
265 MemCmd cmd;
266
267 /// A pointer to the original request.
268 RequestPtr req;
268 const RequestPtr req;
269
270 private:
271 /**
272 * A pointer to the data being transfered. It can be differnt
273 * sizes at each level of the heirarchy so it belongs in the
274 * packet, not request. This may or may not be populated when a
275 * responder recieves the packet. If not populated it memory should
276 * be allocated.

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595 cmd = MemCmd::ReadReq;
596 }
597
598 /**
599 * Constructor. Note that a Request object must be constructed
600 * first, but the Requests's physical address and size fields need
601 * not be valid. The command must be supplied.
602 */
269
270 private:
271 /**
272 * A pointer to the data being transfered. It can be differnt
273 * sizes at each level of the heirarchy so it belongs in the
274 * packet, not request. This may or may not be populated when a
275 * responder recieves the packet. If not populated it memory should
276 * be allocated.

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595 cmd = MemCmd::ReadReq;
596 }
597
598 /**
599 * Constructor. Note that a Request object must be constructed
600 * first, but the Requests's physical address and size fields need
601 * not be valid. The command must be supplied.
602 */
603 Packet(Request *_req, MemCmd _cmd)
603 Packet(const RequestPtr _req, MemCmd _cmd)
604 : cmd(_cmd), req(_req), data(nullptr), addr(0), _isSecure(false),
605 size(0), src(InvalidPortID), dest(InvalidPortID),
606 bytesValidStart(0), bytesValidEnd(0),
607 firstWordDelay(0), lastWordDelay(0),
608 senderState(NULL)
609 {
610 if (req->hasPaddr()) {
611 addr = req->getPaddr();

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618 }
619 }
620
621 /**
622 * Alternate constructor if you are trying to create a packet with
623 * a request that is for a whole block, not the address from the
624 * req. this allows for overriding the size/addr of the req.
625 */
604 : cmd(_cmd), req(_req), data(nullptr), addr(0), _isSecure(false),
605 size(0), src(InvalidPortID), dest(InvalidPortID),
606 bytesValidStart(0), bytesValidEnd(0),
607 firstWordDelay(0), lastWordDelay(0),
608 senderState(NULL)
609 {
610 if (req->hasPaddr()) {
611 addr = req->getPaddr();

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618 }
619 }
620
621 /**
622 * Alternate constructor if you are trying to create a packet with
623 * a request that is for a whole block, not the address from the
624 * req. this allows for overriding the size/addr of the req.
625 */
626 Packet(Request *_req, MemCmd _cmd, int _blkSize)
626 Packet(const RequestPtr _req, MemCmd _cmd, int _blkSize)
627 : cmd(_cmd), req(_req), data(nullptr), addr(0), _isSecure(false),
628 src(InvalidPortID), dest(InvalidPortID),
629 bytesValidStart(0), bytesValidEnd(0),
630 firstWordDelay(0), lastWordDelay(0),
631 senderState(NULL)
632 {
633 if (req->hasPaddr()) {
634 addr = req->getPaddr() & ~(_blkSize - 1);

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641
642 /**
643 * Alternate constructor for copying a packet. Copy all fields
644 * *except* if the original packet's data was dynamic, don't copy
645 * that, as we can't guarantee that the new packet's lifetime is
646 * less than that of the original packet. In this case the new
647 * packet should allocate its own data.
648 */
627 : cmd(_cmd), req(_req), data(nullptr), addr(0), _isSecure(false),
628 src(InvalidPortID), dest(InvalidPortID),
629 bytesValidStart(0), bytesValidEnd(0),
630 firstWordDelay(0), lastWordDelay(0),
631 senderState(NULL)
632 {
633 if (req->hasPaddr()) {
634 addr = req->getPaddr() & ~(_blkSize - 1);

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641
642 /**
643 * Alternate constructor for copying a packet. Copy all fields
644 * *except* if the original packet's data was dynamic, don't copy
645 * that, as we can't guarantee that the new packet's lifetime is
646 * less than that of the original packet. In this case the new
647 * packet should allocate its own data.
648 */
649 Packet(Packet *pkt, bool clearFlags = false)
649 Packet(PacketPtr pkt, bool clearFlags = false)
650 : cmd(pkt->cmd), req(pkt->req),
651 data(pkt->flags.isSet(STATIC_DATA) ? pkt->data : NULL),
652 addr(pkt->addr), _isSecure(pkt->_isSecure), size(pkt->size),
653 src(pkt->src), dest(pkt->dest),
654 bytesValidStart(pkt->bytesValidStart),
655 bytesValidEnd(pkt->bytesValidEnd),
656 firstWordDelay(pkt->firstWordDelay),
657 lastWordDelay(pkt->lastWordDelay),

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691 }
692
693 /**
694 * Constructor-like methods that return Packets based on Request objects.
695 * Will call refineCommand() to fine-tune the Packet type if it's not a
696 * vanilla read or write.
697 */
698 static PacketPtr
650 : cmd(pkt->cmd), req(pkt->req),
651 data(pkt->flags.isSet(STATIC_DATA) ? pkt->data : NULL),
652 addr(pkt->addr), _isSecure(pkt->_isSecure), size(pkt->size),
653 src(pkt->src), dest(pkt->dest),
654 bytesValidStart(pkt->bytesValidStart),
655 bytesValidEnd(pkt->bytesValidEnd),
656 firstWordDelay(pkt->firstWordDelay),
657 lastWordDelay(pkt->lastWordDelay),

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691 }
692
693 /**
694 * Constructor-like methods that return Packets based on Request objects.
695 * Will call refineCommand() to fine-tune the Packet type if it's not a
696 * vanilla read or write.
697 */
698 static PacketPtr
699 createRead(Request *req)
699 createRead(const RequestPtr req)
700 {
701 PacketPtr pkt = new Packet(req, MemCmd::ReadReq);
702 pkt->refineCommand();
703 return pkt;
704 }
705
706 static PacketPtr
700 {
701 PacketPtr pkt = new Packet(req, MemCmd::ReadReq);
702 pkt->refineCommand();
703 return pkt;
704 }
705
706 static PacketPtr
707 createWrite(Request *req)
707 createWrite(const RequestPtr req)
708 {
709 PacketPtr pkt = new Packet(req, MemCmd::WriteReq);
710 pkt->refineCommand();
711 return pkt;
712 }
713
714 /**
715 * clean up packet variables

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720 // delete the request object here, since the requester will
721 // never get the chance.
722 if (req && isRequest() && !needsResponse())
723 delete req;
724 deleteData();
725 }
726
727 /**
708 {
709 PacketPtr pkt = new Packet(req, MemCmd::WriteReq);
710 pkt->refineCommand();
711 return pkt;
712 }
713
714 /**
715 * clean up packet variables

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720 // delete the request object here, since the requester will
721 // never get the chance.
722 if (req && isRequest() && !needsResponse())
723 delete req;
724 deleteData();
725 }
726
727 /**
728 * Reinitialize packet address and size from the associated
729 * Request object, and reset other fields that may have been
730 * modified by a previous transaction. Typically called when a
731 * statically allocated Request/Packet pair is reused for multiple
732 * transactions.
733 */
734 void
735 reinitFromRequest()
736 {
737 assert(req->hasPaddr());
738 flags = 0;
739 addr = req->getPaddr();
740 _isSecure = req->isSecure();
741 size = req->getSize();
742
743 src = InvalidPortID;
744 dest = InvalidPortID;
745 bytesValidStart = 0;
746 bytesValidEnd = 0;
747 firstWordDelay = 0;
748 lastWordDelay = 0;
749
750 flags.set(VALID_ADDR|VALID_SIZE);
751 deleteData();
752 }
753
754 /**
755 * Take a request packet and modify it in place to be suitable for
756 * returning as a response to that request. The source field is
757 * turned into the destination, and subsequently cleared. Note
758 * that the latter is not necessary for atomic requests, but
759 * causes no harm as neither field is valid.
760 */
761 void
762 makeResponse()

--- 239 unchanged lines hidden --- 		728 * Take a request packet and modify it in place to be suitable for
729 * returning as a response to that request. The source field is
730 * turned into the destination, and subsequently cleared. Note
731 * that the latter is not necessary for atomic requests, but
732 * causes no harm as neither field is valid.
733 */
734 void
735 makeResponse()

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