packet.hh revision 6227:a17798f2a52c
1/* 2 * Copyright (c) 2006 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Ron Dreslinski 29 * Steve Reinhardt 30 * Ali Saidi 31 */ 32 33/** 34 * @file 35 * Declaration of the Packet class. 36 */ 37 38#ifndef __MEM_PACKET_HH__ 39#define __MEM_PACKET_HH__ 40 41#include <cassert> 42#include <list> 43#include <bitset> 44 45#include "base/cast.hh" 46#include "base/compiler.hh" 47#include "base/fast_alloc.hh" 48#include "base/flags.hh" 49#include "base/misc.hh" 50#include "base/printable.hh" 51#include "base/types.hh" 52#include "mem/request.hh" 53#include "sim/core.hh" 54 55struct Packet; 56typedef Packet *PacketPtr; 57typedef uint8_t* PacketDataPtr; 58typedef std::list<PacketPtr> PacketList; 59 60class MemCmd 61{ 62 friend class Packet; 63 64 public: 65 /** 66 * List of all commands associated with a packet. 67 */ 68 enum Command 69 { 70 InvalidCmd, 71 ReadReq, 72 ReadResp, 73 ReadRespWithInvalidate, 74 WriteReq, 75 WriteResp, 76 Writeback, 77 SoftPFReq, 78 HardPFReq, 79 SoftPFResp, 80 HardPFResp, 81 WriteInvalidateReq, 82 WriteInvalidateResp, 83 UpgradeReq, 84 UpgradeResp, 85 ReadExReq, 86 ReadExResp, 87 LoadLockedReq, 88 StoreCondReq, 89 StoreCondResp, 90 SwapReq, 91 SwapResp, 92 MessageReq, 93 MessageResp, 94 // Error responses 95 // @TODO these should be classified as responses rather than 96 // requests; coding them as requests initially for backwards 97 // compatibility 98 NetworkNackError, // nacked at network layer (not by protocol) 99 InvalidDestError, // packet dest field invalid 100 BadAddressError, // memory address invalid 101 // Fake simulator-only commands 102 PrintReq, // Print state matching address 103 NUM_MEM_CMDS 104 }; 105 106 private: 107 /** 108 * List of command attributes. 109 */ 110 enum Attribute 111 { 112 IsRead, //!< Data flows from responder to requester 113 IsWrite, //!< Data flows from requester to responder 114 IsPrefetch, //!< Not a demand access 115 IsInvalidate, 116 NeedsExclusive, //!< Requires exclusive copy to complete in-cache 117 IsRequest, //!< Issued by requester 118 IsResponse, //!< Issue by responder 119 NeedsResponse, //!< Requester needs response from target 120 IsSWPrefetch, 121 IsHWPrefetch, 122 IsLlsc, //!< Alpha/MIPS LL or SC access 123 HasData, //!< There is an associated payload 124 IsError, //!< Error response 125 IsPrint, //!< Print state matching address (for debugging) 126 NUM_COMMAND_ATTRIBUTES 127 }; 128 129 /** 130 * Structure that defines attributes and other data associated 131 * with a Command. 132 */ 133 struct CommandInfo 134 { 135 /// Set of attribute flags. 136 const std::bitset<NUM_COMMAND_ATTRIBUTES> attributes; 137 /// Corresponding response for requests; InvalidCmd if no 138 /// response is applicable. 139 const Command response; 140 /// String representation (for printing) 141 const std::string str; 142 }; 143 144 /// Array to map Command enum to associated info. 145 static const CommandInfo commandInfo[]; 146 147 private: 148 149 Command cmd; 150 151 bool 152 testCmdAttrib(MemCmd::Attribute attrib) const 153 { 154 return commandInfo[cmd].attributes[attrib] != 0; 155 } 156 157 public: 158 159 bool isRead() const { return testCmdAttrib(IsRead); } 160 bool isWrite() const { return testCmdAttrib(IsWrite); } 161 bool isRequest() const { return testCmdAttrib(IsRequest); } 162 bool isResponse() const { return testCmdAttrib(IsResponse); } 163 bool needsExclusive() const { return testCmdAttrib(NeedsExclusive); } 164 bool needsResponse() const { return testCmdAttrib(NeedsResponse); } 165 bool isInvalidate() const { return testCmdAttrib(IsInvalidate); } 166 bool hasData() const { return testCmdAttrib(HasData); } 167 bool isReadWrite() const { return isRead() && isWrite(); } 168 bool isLLSC() const { return testCmdAttrib(IsLlsc); } 169 bool isError() const { return testCmdAttrib(IsError); } 170 bool isPrint() const { return testCmdAttrib(IsPrint); } 171 172 const Command 173 responseCommand() const 174 { 175 return commandInfo[cmd].response; 176 } 177 178 /// Return the string to a cmd given by idx. 179 const std::string &toString() const { return commandInfo[cmd].str; } 180 int toInt() const { return (int)cmd; } 181 182 MemCmd(Command _cmd) : cmd(_cmd) { } 183 MemCmd(int _cmd) : cmd((Command)_cmd) { } 184 MemCmd() : cmd(InvalidCmd) { } 185 186 bool operator==(MemCmd c2) const { return (cmd == c2.cmd); } 187 bool operator!=(MemCmd c2) const { return (cmd != c2.cmd); } 188}; 189 190/** 191 * A Packet is used to encapsulate a transfer between two objects in 192 * the memory system (e.g., the L1 and L2 cache). (In contrast, a 193 * single Request travels all the way from the requester to the 194 * ultimate destination and back, possibly being conveyed by several 195 * different Packets along the way.) 196 */ 197class Packet : public FastAlloc, public Printable 198{ 199 public: 200 typedef uint32_t FlagsType; 201 typedef ::Flags<FlagsType> Flags; 202 typedef short NodeID; 203 204 private: 205 static const FlagsType PUBLIC_FLAGS = 0x00000000; 206 static const FlagsType PRIVATE_FLAGS = 0x00007F0F; 207 static const FlagsType COPY_FLAGS = 0x0000000F; 208 209 static const FlagsType SHARED = 0x00000001; 210 // Special control flags 211 /// Special timing-mode atomic snoop for multi-level coherence. 212 static const FlagsType EXPRESS_SNOOP = 0x00000002; 213 /// Does supplier have exclusive copy? 214 /// Useful for multi-level coherence. 215 static const FlagsType SUPPLY_EXCLUSIVE = 0x00000004; 216 // Snoop response flags 217 static const FlagsType MEM_INHIBIT = 0x00000008; 218 /// Are the 'addr' and 'size' fields valid? 219 static const FlagsType VALID_ADDR = 0x00000100; 220 static const FlagsType VALID_SIZE = 0x00000200; 221 /// Is the 'src' field valid? 222 static const FlagsType VALID_SRC = 0x00000400; 223 static const FlagsType VALID_DST = 0x00000800; 224 /// Is the data pointer set to a value that shouldn't be freed 225 /// when the packet is destroyed? 226 static const FlagsType STATIC_DATA = 0x00001000; 227 /// The data pointer points to a value that should be freed when 228 /// the packet is destroyed. 229 static const FlagsType DYNAMIC_DATA = 0x00002000; 230 /// the data pointer points to an array (thus delete []) needs to 231 /// be called on it rather than simply delete. 232 static const FlagsType ARRAY_DATA = 0x00004000; 233 234 Flags flags; 235 236 public: 237 typedef MemCmd::Command Command; 238 239 /// The command field of the packet. 240 MemCmd cmd; 241 242 /// A pointer to the original request. 243 RequestPtr req; 244 245 private: 246 /** 247 * A pointer to the data being transfered. It can be differnt 248 * sizes at each level of the heirarchy so it belongs in the 249 * packet, not request. This may or may not be populated when a 250 * responder recieves the packet. If not populated it memory should 251 * be allocated. 252 */ 253 PacketDataPtr data; 254 255 /// The address of the request. This address could be virtual or 256 /// physical, depending on the system configuration. 257 Addr addr; 258 259 /// The size of the request or transfer. 260 unsigned size; 261 262 /** 263 * Device address (e.g., bus ID) of the source of the 264 * transaction. The source is not responsible for setting this 265 * field; it is set implicitly by the interconnect when the packet 266 * is first sent. 267 */ 268 NodeID src; 269 270 /** 271 * Device address (e.g., bus ID) of the destination of the 272 * transaction. The special value Broadcast indicates that the 273 * packet should be routed based on its address. This field is 274 * initialized in the constructor and is thus always valid (unlike 275 * addr, size, and src). 276 */ 277 NodeID dest; 278 279 /** 280 * The original value of the command field. Only valid when the 281 * current command field is an error condition; in that case, the 282 * previous contents of the command field are copied here. This 283 * field is *not* set on non-error responses. 284 */ 285 MemCmd origCmd; 286 287 public: 288 /// Used to calculate latencies for each packet. 289 Tick time; 290 291 /// The time at which the packet will be fully transmitted 292 Tick finishTime; 293 294 /// The time at which the first chunk of the packet will be transmitted 295 Tick firstWordTime; 296 297 /// The special destination address indicating that the packet 298 /// should be routed based on its address. 299 static const NodeID Broadcast = -1; 300 301 /** 302 * A virtual base opaque structure used to hold state associated 303 * with the packet but specific to the sending device (e.g., an 304 * MSHR). A pointer to this state is returned in the packet's 305 * response so that the sender can quickly look up the state 306 * needed to process it. A specific subclass would be derived 307 * from this to carry state specific to a particular sending 308 * device. 309 */ 310 struct SenderState 311 { 312 virtual ~SenderState() {} 313 }; 314 315 /** 316 * Object used to maintain state of a PrintReq. The senderState 317 * field of a PrintReq should always be of this type. 318 */ 319 class PrintReqState : public SenderState, public FastAlloc 320 { 321 private: 322 /** 323 * An entry in the label stack. 324 */ 325 struct LabelStackEntry 326 { 327 const std::string label; 328 std::string *prefix; 329 bool labelPrinted; 330 LabelStackEntry(const std::string &_label, std::string *_prefix); 331 }; 332 333 typedef std::list<LabelStackEntry> LabelStack; 334 LabelStack labelStack; 335 336 std::string *curPrefixPtr; 337 338 public: 339 std::ostream &os; 340 const int verbosity; 341 342 PrintReqState(std::ostream &os, int verbosity = 0); 343 ~PrintReqState(); 344 345 /** 346 * Returns the current line prefix. 347 */ 348 const std::string &curPrefix() { return *curPrefixPtr; } 349 350 /** 351 * Push a label onto the label stack, and prepend the given 352 * prefix string onto the current prefix. Labels will only be 353 * printed if an object within the label's scope is printed. 354 */ 355 void pushLabel(const std::string &lbl, 356 const std::string &prefix = " "); 357 358 /** 359 * Pop a label off the label stack. 360 */ 361 void popLabel(); 362 363 /** 364 * Print all of the pending unprinted labels on the 365 * stack. Called by printObj(), so normally not called by 366 * users unless bypassing printObj(). 367 */ 368 void printLabels(); 369 370 /** 371 * Print a Printable object to os, because it matched the 372 * address on a PrintReq. 373 */ 374 void printObj(Printable *obj); 375 }; 376 377 /** 378 * This packet's sender state. Devices should use dynamic_cast<> 379 * to cast to the state appropriate to the sender. The intent of 380 * this variable is to allow a device to attach extra information 381 * to a request. A response packet must return the sender state 382 * that was attached to the original request (even if a new packet 383 * is created). 384 */ 385 SenderState *senderState; 386 387 /// Return the string name of the cmd field (for debugging and 388 /// tracing). 389 const std::string &cmdString() const { return cmd.toString(); } 390 391 /// Return the index of this command. 392 inline int cmdToIndex() const { return cmd.toInt(); } 393 394 bool isRead() const { return cmd.isRead(); } 395 bool isWrite() const { return cmd.isWrite(); } 396 bool isRequest() const { return cmd.isRequest(); } 397 bool isResponse() const { return cmd.isResponse(); } 398 bool needsExclusive() const { return cmd.needsExclusive(); } 399 bool needsResponse() const { return cmd.needsResponse(); } 400 bool isInvalidate() const { return cmd.isInvalidate(); } 401 bool hasData() const { return cmd.hasData(); } 402 bool isReadWrite() const { return cmd.isReadWrite(); } 403 bool isLLSC() const { return cmd.isLLSC(); } 404 bool isError() const { return cmd.isError(); } 405 bool isPrint() const { return cmd.isPrint(); } 406 407 // Snoop flags 408 void assertMemInhibit() { flags.set(MEM_INHIBIT); } 409 bool memInhibitAsserted() { return flags.isSet(MEM_INHIBIT); } 410 void assertShared() { flags.set(SHARED); } 411 bool sharedAsserted() { return flags.isSet(SHARED); } 412 413 // Special control flags 414 void setExpressSnoop() { flags.set(EXPRESS_SNOOP); } 415 bool isExpressSnoop() { return flags.isSet(EXPRESS_SNOOP); } 416 void setSupplyExclusive() { flags.set(SUPPLY_EXCLUSIVE); } 417 bool isSupplyExclusive() { return flags.isSet(SUPPLY_EXCLUSIVE); } 418 419 // Network error conditions... encapsulate them as methods since 420 // their encoding keeps changing (from result field to command 421 // field, etc.) 422 void 423 setNacked() 424 { 425 assert(isResponse()); 426 cmd = MemCmd::NetworkNackError; 427 } 428 429 void 430 setBadAddress() 431 { 432 assert(isResponse()); 433 cmd = MemCmd::BadAddressError; 434 } 435 436 bool wasNacked() const { return cmd == MemCmd::NetworkNackError; } 437 bool hadBadAddress() const { return cmd == MemCmd::BadAddressError; } 438 void copyError(Packet *pkt) { assert(pkt->isError()); cmd = pkt->cmd; } 439 440 /// Accessor function to get the source index of the packet. 441 NodeID getSrc() const { assert(flags.isSet(VALID_SRC)); return src; } 442 /// Accessor function to set the source index of the packet. 443 void setSrc(NodeID _src) { src = _src; flags.set(VALID_SRC); } 444 /// Reset source field, e.g. to retransmit packet on different bus. 445 void clearSrc() { flags.clear(VALID_SRC); } 446 447 /// Accessor function for the destination index of the packet. 448 NodeID getDest() const { assert(flags.isSet(VALID_DST)); return dest; } 449 /// Accessor function to set the destination index of the packet. 450 void setDest(NodeID _dest) { dest = _dest; flags.set(VALID_DST); } 451 452 Addr getAddr() const { assert(flags.isSet(VALID_ADDR)); return addr; } 453 unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; } 454 Addr getOffset(int blkSize) const { return getAddr() & (Addr)(blkSize - 1); } 455 456 /** 457 * Constructor. Note that a Request object must be constructed 458 * first, but the Requests's physical address and size fields need 459 * not be valid. The command and destination addresses must be 460 * supplied. 461 */ 462 Packet(Request *_req, MemCmd _cmd, NodeID _dest) 463 : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL), 464 dest(_dest), time(curTick), senderState(NULL) 465 { 466 if (req->hasPaddr()) { 467 addr = req->getPaddr(); 468 flags.set(VALID_ADDR); 469 } 470 if (req->hasSize()) { 471 size = req->getSize(); 472 flags.set(VALID_SIZE); 473 } 474 } 475 476 /** 477 * Alternate constructor if you are trying to create a packet with 478 * a request that is for a whole block, not the address from the 479 * req. this allows for overriding the size/addr of the req. 480 */ 481 Packet(Request *_req, MemCmd _cmd, NodeID _dest, int _blkSize) 482 : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL), 483 dest(_dest), time(curTick), senderState(NULL) 484 { 485 if (req->hasPaddr()) { 486 addr = req->getPaddr() & ~(_blkSize - 1); 487 flags.set(VALID_ADDR); 488 } 489 size = _blkSize; 490 flags.set(VALID_SIZE); 491 } 492 493 /** 494 * Alternate constructor for copying a packet. Copy all fields 495 * *except* if the original packet's data was dynamic, don't copy 496 * that, as we can't guarantee that the new packet's lifetime is 497 * less than that of the original packet. In this case the new 498 * packet should allocate its own data. 499 */ 500 Packet(Packet *pkt, bool clearFlags = false) 501 : cmd(pkt->cmd), req(pkt->req), 502 data(pkt->flags.isSet(STATIC_DATA) ? pkt->data : NULL), 503 addr(pkt->addr), size(pkt->size), src(pkt->src), dest(pkt->dest), 504 time(curTick), senderState(pkt->senderState) 505 { 506 if (!clearFlags) 507 flags.set(pkt->flags & COPY_FLAGS); 508 509 flags.set(pkt->flags & (VALID_ADDR|VALID_SIZE|VALID_SRC|VALID_DST)); 510 flags.set(pkt->flags & STATIC_DATA); 511 } 512 513 /** 514 * clean up packet variables 515 */ 516 ~Packet() 517 { 518 // If this is a request packet for which there's no response, 519 // delete the request object here, since the requester will 520 // never get the chance. 521 if (req && isRequest() && !needsResponse()) 522 delete req; 523 deleteData(); 524 } 525 526 /** 527 * Reinitialize packet address and size from the associated 528 * Request object, and reset other fields that may have been 529 * modified by a previous transaction. Typically called when a 530 * statically allocated Request/Packet pair is reused for multiple 531 * transactions. 532 */ 533 void 534 reinitFromRequest() 535 { 536 assert(req->hasPaddr()); 537 flags = 0; 538 addr = req->getPaddr(); 539 size = req->getSize(); 540 time = req->time(); 541 542 flags.set(VALID_ADDR|VALID_SIZE); 543 deleteData(); 544 } 545 546 /** 547 * Take a request packet and modify it in place to be suitable for 548 * returning as a response to that request. The source and 549 * destination fields are *not* modified, as is appropriate for 550 * atomic accesses. 551 */ 552 void 553 makeResponse() 554 { 555 assert(needsResponse()); 556 assert(isRequest()); 557 origCmd = cmd; 558 cmd = cmd.responseCommand(); 559 560 dest = src; 561 flags.set(VALID_DST, flags.isSet(VALID_SRC)); 562 flags.clear(VALID_SRC); 563 } 564 565 void 566 makeAtomicResponse() 567 { 568 makeResponse(); 569 } 570 571 void 572 makeTimingResponse() 573 { 574 makeResponse(); 575 } 576 577 /** 578 * Take a request packet that has been returned as NACKED and 579 * modify it so that it can be sent out again. Only packets that 580 * need a response can be NACKED, so verify that that is true. 581 */ 582 void 583 reinitNacked() 584 { 585 assert(wasNacked()); 586 cmd = origCmd; 587 assert(needsResponse()); 588 setDest(Broadcast); 589 } 590 591 592 /** 593 * Set the data pointer to the following value that should not be 594 * freed. 595 */ 596 template <typename T> 597 void 598 dataStatic(T *p) 599 { 600 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA)); 601 data = (PacketDataPtr)p; 602 flags.set(STATIC_DATA); 603 } 604 605 /** 606 * Set the data pointer to a value that should have delete [] 607 * called on it. 608 */ 609 template <typename T> 610 void 611 dataDynamicArray(T *p) 612 { 613 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA)); 614 data = (PacketDataPtr)p; 615 flags.set(DYNAMIC_DATA|ARRAY_DATA); 616 } 617 618 /** 619 * set the data pointer to a value that should have delete called 620 * on it. 621 */ 622 template <typename T> 623 void 624 dataDynamic(T *p) 625 { 626 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA)); 627 data = (PacketDataPtr)p; 628 flags.set(DYNAMIC_DATA); 629 } 630 631 /** 632 * get a pointer to the data ptr. 633 */ 634 template <typename T> 635 T* 636 getPtr() 637 { 638 assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA)); 639 return (T*)data; 640 } 641 642 /** 643 * return the value of what is pointed to in the packet. 644 */ 645 template <typename T> 646 T get(); 647 648 /** 649 * set the value in the data pointer to v. 650 */ 651 template <typename T> 652 void set(T v); 653 654 /** 655 * Copy data into the packet from the provided pointer. 656 */ 657 void 658 setData(uint8_t *p) 659 { 660 std::memcpy(getPtr<uint8_t>(), p, getSize()); 661 } 662 663 /** 664 * Copy data into the packet from the provided block pointer, 665 * which is aligned to the given block size. 666 */ 667 void 668 setDataFromBlock(uint8_t *blk_data, int blkSize) 669 { 670 setData(blk_data + getOffset(blkSize)); 671 } 672 673 /** 674 * Copy data from the packet to the provided block pointer, which 675 * is aligned to the given block size. 676 */ 677 void 678 writeData(uint8_t *p) 679 { 680 std::memcpy(p, getPtr<uint8_t>(), getSize()); 681 } 682 683 /** 684 * Copy data from the packet to the memory at the provided pointer. 685 */ 686 void 687 writeDataToBlock(uint8_t *blk_data, int blkSize) 688 { 689 writeData(blk_data + getOffset(blkSize)); 690 } 691 692 /** 693 * delete the data pointed to in the data pointer. Ok to call to 694 * matter how data was allocted. 695 */ 696 void 697 deleteData() 698 { 699 if (flags.isSet(ARRAY_DATA)) 700 delete [] data; 701 else if (flags.isSet(DYNAMIC_DATA)) 702 delete data; 703 704 flags.clear(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA); 705 data = NULL; 706 } 707 708 /** If there isn't data in the packet, allocate some. */ 709 void 710 allocate() 711 { 712 if (data) { 713 assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA)); 714 return; 715 } 716 717 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA)); 718 flags.set(DYNAMIC_DATA|ARRAY_DATA); 719 data = new uint8_t[getSize()]; 720 } 721 722 723 /** 724 * Check a functional request against a memory value represented 725 * by a base/size pair and an associated data array. If the 726 * functional request is a read, it may be satisfied by the memory 727 * value. If the functional request is a write, it may update the 728 * memory value. 729 */ 730 bool checkFunctional(Printable *obj, Addr base, int size, uint8_t *data); 731 732 /** 733 * Check a functional request against a memory value stored in 734 * another packet (i.e. an in-transit request or response). 735 */ 736 bool 737 checkFunctional(PacketPtr other) 738 { 739 uint8_t *data = other->hasData() ? other->getPtr<uint8_t>() : NULL; 740 return checkFunctional(other, other->getAddr(), other->getSize(), 741 data); 742 } 743 744 /** 745 * Push label for PrintReq (safe to call unconditionally). 746 */ 747 void 748 pushLabel(const std::string &lbl) 749 { 750 if (isPrint()) 751 safe_cast<PrintReqState*>(senderState)->pushLabel(lbl); 752 } 753 754 /** 755 * Pop label for PrintReq (safe to call unconditionally). 756 */ 757 void 758 popLabel() 759 { 760 if (isPrint()) 761 safe_cast<PrintReqState*>(senderState)->popLabel(); 762 } 763 764 void print(std::ostream &o, int verbosity = 0, 765 const std::string &prefix = "") const; 766}; 767 768#endif //__MEM_PACKET_HH 769