packet.hh (12652:bae1a1865204) packet.hh (12749:223c83ed9979)
1/*
2 * Copyright (c) 2012-2018 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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315 typedef MemCmd::Command Command;
316
317 /// The command field of the packet.
318 MemCmd cmd;
319
320 const PacketId id;
321
322 /// A pointer to the original request.
1/*
2 * Copyright (c) 2012-2018 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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315 typedef MemCmd::Command Command;
316
317 /// The command field of the packet.
318 MemCmd cmd;
319
320 const PacketId id;
321
322 /// A pointer to the original request.
323 const RequestPtr req;
323 RequestPtr req;
324
325 private:
326 /**
327 * A pointer to the data being transferred. It can be different
328 * sizes at each level of the hierarchy so it belongs to the
329 * packet, not request. This may or may not be populated when a
330 * responder receives the packet. If not populated memory should
331 * be allocated.

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740 cmd = MemCmd::ReadReq;
741 }
742
743 /**
744 * Constructor. Note that a Request object must be constructed
745 * first, but the Requests's physical address and size fields need
746 * not be valid. The command must be supplied.
747 */
324
325 private:
326 /**
327 * A pointer to the data being transferred. It can be different
328 * sizes at each level of the hierarchy so it belongs to the
329 * packet, not request. This may or may not be populated when a
330 * responder receives the packet. If not populated memory should
331 * be allocated.

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740 cmd = MemCmd::ReadReq;
741 }
742
743 /**
744 * Constructor. Note that a Request object must be constructed
745 * first, but the Requests's physical address and size fields need
746 * not be valid. The command must be supplied.
747 */
748 Packet(const RequestPtr _req, MemCmd _cmd)
749 : cmd(_cmd), id((PacketId)_req), req(_req), data(nullptr), addr(0),
750 _isSecure(false), size(0), headerDelay(0), snoopDelay(0),
748 Packet(const RequestPtr &_req, MemCmd _cmd)
749 : cmd(_cmd), id((PacketId)_req.get()), req(_req), data(nullptr),
750 addr(0), _isSecure(false), size(0), headerDelay(0), snoopDelay(0),
751 payloadDelay(0), senderState(NULL)
752 {
753 if (req->hasPaddr()) {
754 addr = req->getPaddr();
755 flags.set(VALID_ADDR);
756 _isSecure = req->isSecure();
757 }
758 if (req->hasSize()) {
759 size = req->getSize();
760 flags.set(VALID_SIZE);
761 }
762 }
763
764 /**
765 * Alternate constructor if you are trying to create a packet with
766 * a request that is for a whole block, not the address from the
767 * req. this allows for overriding the size/addr of the req.
768 */
751 payloadDelay(0), senderState(NULL)
752 {
753 if (req->hasPaddr()) {
754 addr = req->getPaddr();
755 flags.set(VALID_ADDR);
756 _isSecure = req->isSecure();
757 }
758 if (req->hasSize()) {
759 size = req->getSize();
760 flags.set(VALID_SIZE);
761 }
762 }
763
764 /**
765 * Alternate constructor if you are trying to create a packet with
766 * a request that is for a whole block, not the address from the
767 * req. this allows for overriding the size/addr of the req.
768 */
769 Packet(const RequestPtr _req, MemCmd _cmd, int _blkSize, PacketId _id = 0)
770 : cmd(_cmd), id(_id ? _id : (PacketId)_req), req(_req), data(nullptr),
771 addr(0), _isSecure(false), headerDelay(0), snoopDelay(0),
772 payloadDelay(0), senderState(NULL)
769 Packet(const RequestPtr &_req, MemCmd _cmd, int _blkSize, PacketId _id = 0)
770 : cmd(_cmd), id(_id ? _id : (PacketId)_req.get()), req(_req),
771 data(nullptr), addr(0), _isSecure(false), headerDelay(0),
772 snoopDelay(0), payloadDelay(0), senderState(NULL)
773 {
774 if (req->hasPaddr()) {
775 addr = req->getPaddr() & ~(_blkSize - 1);
776 flags.set(VALID_ADDR);
777 _isSecure = req->isSecure();
778 }
779 size = _blkSize;
780 flags.set(VALID_SIZE);

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818 }
819 }
820 }
821
822 /**
823 * Generate the appropriate read MemCmd based on the Request flags.
824 */
825 static MemCmd
773 {
774 if (req->hasPaddr()) {
775 addr = req->getPaddr() & ~(_blkSize - 1);
776 flags.set(VALID_ADDR);
777 _isSecure = req->isSecure();
778 }
779 size = _blkSize;
780 flags.set(VALID_SIZE);

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818 }
819 }
820 }
821
822 /**
823 * Generate the appropriate read MemCmd based on the Request flags.
824 */
825 static MemCmd
826 makeReadCmd(const RequestPtr req)
826 makeReadCmd(const RequestPtr &req)
827 {
828 if (req->isLLSC())
829 return MemCmd::LoadLockedReq;
830 else if (req->isPrefetch())
831 return MemCmd::SoftPFReq;
832 else
833 return MemCmd::ReadReq;
834 }
835
836 /**
837 * Generate the appropriate write MemCmd based on the Request flags.
838 */
839 static MemCmd
827 {
828 if (req->isLLSC())
829 return MemCmd::LoadLockedReq;
830 else if (req->isPrefetch())
831 return MemCmd::SoftPFReq;
832 else
833 return MemCmd::ReadReq;
834 }
835
836 /**
837 * Generate the appropriate write MemCmd based on the Request flags.
838 */
839 static MemCmd
840 makeWriteCmd(const RequestPtr req)
840 makeWriteCmd(const RequestPtr &req)
841 {
842 if (req->isLLSC())
843 return MemCmd::StoreCondReq;
844 else if (req->isSwap())
845 return MemCmd::SwapReq;
846 else if (req->isCacheInvalidate()) {
847 return req->isCacheClean() ? MemCmd::CleanInvalidReq :
848 MemCmd::InvalidateReq;
849 } else if (req->isCacheClean()) {
850 return MemCmd::CleanSharedReq;
851 } else
852 return MemCmd::WriteReq;
853 }
854
855 /**
856 * Constructor-like methods that return Packets based on Request objects.
857 * Fine-tune the MemCmd type if it's not a vanilla read or write.
858 */
859 static PacketPtr
841 {
842 if (req->isLLSC())
843 return MemCmd::StoreCondReq;
844 else if (req->isSwap())
845 return MemCmd::SwapReq;
846 else if (req->isCacheInvalidate()) {
847 return req->isCacheClean() ? MemCmd::CleanInvalidReq :
848 MemCmd::InvalidateReq;
849 } else if (req->isCacheClean()) {
850 return MemCmd::CleanSharedReq;
851 } else
852 return MemCmd::WriteReq;
853 }
854
855 /**
856 * Constructor-like methods that return Packets based on Request objects.
857 * Fine-tune the MemCmd type if it's not a vanilla read or write.
858 */
859 static PacketPtr
860 createRead(const RequestPtr req)
860 createRead(const RequestPtr &req)
861 {
862 return new Packet(req, makeReadCmd(req));
863 }
864
865 static PacketPtr
861 {
862 return new Packet(req, makeReadCmd(req));
863 }
864
865 static PacketPtr
866 createWrite(const RequestPtr req)
866 createWrite(const RequestPtr &req)
867 {
868 return new Packet(req, makeWriteCmd(req));
869 }
870
871 /**
872 * clean up packet variables
873 */
874 ~Packet()
875 {
867 {
868 return new Packet(req, makeWriteCmd(req));
869 }
870
871 /**
872 * clean up packet variables
873 */
874 ~Packet()
875 {
876 // Delete the request object if this is a request packet which
877 // does not need a response, because the requester will not get
878 // a chance. If the request packet needs a response then the
879 // request will be deleted on receipt of the response
880 // packet. We also make sure to never delete the request for
881 // express snoops, even for cases when responses are not
882 // needed (CleanEvict and Writeback), since the snoop packet
883 // re-uses the same request.
884 if (req && isRequest() && !needsResponse() &&
885 !isExpressSnoop()) {
886 delete req;
887 }
888 deleteData();
889 }
890
891 /**
892 * Take a request packet and modify it in place to be suitable for
893 * returning as a response to that request.
894 */
895 void

--- 361 unchanged lines hidden --- 		876 deleteData();
877 }
878
879 /**
880 * Take a request packet and modify it in place to be suitable for
881 * returning as a response to that request.
882 */
883 void

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