packet.hh (8737:770ccf3af571) packet.hh (8949:3fa1ee293096)
1/*
1/*
2 * Copyright (c) 2012 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
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
2 * Copyright (c) 2006 The Regents of The University of Michigan
3 * Copyright (c) 2010 Advanced Micro Devices, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions are
8 * met: redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer;

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312 Tick time;
313
314 /// The time at which the packet will be fully transmitted
315 Tick finishTime;
316
317 /// The time at which the first chunk of the packet will be transmitted
318 Tick firstWordTime;
319
14 * Copyright (c) 2006 The Regents of The University of Michigan
15 * Copyright (c) 2010 Advanced Micro Devices, Inc.
16 * All rights reserved.
17 *
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions are
20 * met: redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer;

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324 Tick time;
325
326 /// The time at which the packet will be fully transmitted
327 Tick finishTime;
328
329 /// The time at which the first chunk of the packet will be transmitted
330 Tick firstWordTime;
331
320 /// The special destination address indicating that the packet
321 /// should be routed based on its address.
322 static const NodeID Broadcast = -1;
323
324 /**
325 * A virtual base opaque structure used to hold state associated
326 * with the packet but specific to the sending device (e.g., an
327 * MSHR). A pointer to this state is returned in the packet's
328 * response so that the sender can quickly look up the state
329 * needed to process it. A specific subclass would be derived
330 * from this to carry state specific to a particular sending
331 * device.

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473 /// Reset source field, e.g. to retransmit packet on different bus.
474 void clearSrc() { flags.clear(VALID_SRC); }
475
476 bool isDestValid() { return flags.isSet(VALID_DST); }
477 /// Accessor function for the destination index of the packet.
478 NodeID getDest() const { assert(flags.isSet(VALID_DST)); return dest; }
479 /// Accessor function to set the destination index of the packet.
480 void setDest(NodeID _dest) { dest = _dest; flags.set(VALID_DST); }
332 /**
333 * A virtual base opaque structure used to hold state associated
334 * with the packet but specific to the sending device (e.g., an
335 * MSHR). A pointer to this state is returned in the packet's
336 * response so that the sender can quickly look up the state
337 * needed to process it. A specific subclass would be derived
338 * from this to carry state specific to a particular sending
339 * device.

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481 /// Reset source field, e.g. to retransmit packet on different bus.
482 void clearSrc() { flags.clear(VALID_SRC); }
483
484 bool isDestValid() { return flags.isSet(VALID_DST); }
485 /// Accessor function for the destination index of the packet.
486 NodeID getDest() const { assert(flags.isSet(VALID_DST)); return dest; }
487 /// Accessor function to set the destination index of the packet.
488 void setDest(NodeID _dest) { dest = _dest; flags.set(VALID_DST); }
489 /// Reset destination field, e.g. to turn a response into a request again.
490 void clearDest() { flags.clear(VALID_DST); }
481
482 Addr getAddr() const { assert(flags.isSet(VALID_ADDR)); return addr; }
483 unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; }
484 Addr getOffset(int blkSize) const { return getAddr() & (Addr)(blkSize - 1); }
485
486 /**
487 * It has been determined that the SC packet should successfully update
488 * memory. Therefore, convert this SC packet to a normal write.

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508 }
509
510 /**
511 * Constructor. Note that a Request object must be constructed
512 * first, but the Requests's physical address and size fields need
513 * not be valid. The command and destination addresses must be
514 * supplied.
515 */
491
492 Addr getAddr() const { assert(flags.isSet(VALID_ADDR)); return addr; }
493 unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; }
494 Addr getOffset(int blkSize) const { return getAddr() & (Addr)(blkSize - 1); }
495
496 /**
497 * It has been determined that the SC packet should successfully update
498 * memory. Therefore, convert this SC packet to a normal write.

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518 }
519
520 /**
521 * Constructor. Note that a Request object must be constructed
522 * first, but the Requests's physical address and size fields need
523 * not be valid. The command and destination addresses must be
524 * supplied.
525 */
516 Packet(Request *_req, MemCmd _cmd, NodeID _dest)
517 : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL),
518 dest(_dest), bytesValidStart(0), bytesValidEnd(0),
526 Packet(Request *_req, MemCmd _cmd)
527 : cmd(_cmd), req(_req), data(NULL),
528 bytesValidStart(0), bytesValidEnd(0),
519 time(curTick()), senderState(NULL)
520 {
521 if (req->hasPaddr()) {
522 addr = req->getPaddr();
523 flags.set(VALID_ADDR);
524 }
525 if (req->hasSize()) {
526 size = req->getSize();
527 flags.set(VALID_SIZE);
528 }
529 }
530
531 /**
532 * Alternate constructor if you are trying to create a packet with
533 * a request that is for a whole block, not the address from the
534 * req. this allows for overriding the size/addr of the req.
535 */
529 time(curTick()), senderState(NULL)
530 {
531 if (req->hasPaddr()) {
532 addr = req->getPaddr();
533 flags.set(VALID_ADDR);
534 }
535 if (req->hasSize()) {
536 size = req->getSize();
537 flags.set(VALID_SIZE);
538 }
539 }
540
541 /**
542 * Alternate constructor if you are trying to create a packet with
543 * a request that is for a whole block, not the address from the
544 * req. this allows for overriding the size/addr of the req.
545 */
536 Packet(Request *_req, MemCmd _cmd, NodeID _dest, int _blkSize)
537 : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL),
538 dest(_dest), bytesValidStart(0), bytesValidEnd(0),
546 Packet(Request *_req, MemCmd _cmd, int _blkSize)
547 : cmd(_cmd), req(_req), data(NULL),
548 bytesValidStart(0), bytesValidEnd(0),
539 time(curTick()), senderState(NULL)
540 {
541 if (req->hasPaddr()) {
542 addr = req->getPaddr() & ~(_blkSize - 1);
543 flags.set(VALID_ADDR);
544 }
545 size = _blkSize;
546 flags.set(VALID_SIZE);

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654 * need a response can be NACKED, so verify that that is true.
655 */
656 void
657 reinitNacked()
658 {
659 assert(wasNacked());
660 cmd = origCmd;
661 assert(needsResponse());
549 time(curTick()), senderState(NULL)
550 {
551 if (req->hasPaddr()) {
552 addr = req->getPaddr() & ~(_blkSize - 1);
553 flags.set(VALID_ADDR);
554 }
555 size = _blkSize;
556 flags.set(VALID_SIZE);

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664 * need a response can be NACKED, so verify that that is true.
665 */
666 void
667 reinitNacked()
668 {
669 assert(wasNacked());
670 cmd = origCmd;
671 assert(needsResponse());
662 setDest(Broadcast);
672 clearDest();
663 }
664
665 void
666 setSize(unsigned size)
667 {
668 assert(!flags.isSet(VALID_SIZE));
669
670 this->size = size;

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674
675 void
676 setSize(unsigned size)
677 {
678 assert(!flags.isSet(VALID_SIZE));
679
680 this->size = size;

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