packet.hh revision 6768
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 bool isSrcValid() { return flags.isSet(VALID_SRC); } 441 /// Accessor function to get the source index of the packet. 442 NodeID getSrc() const { assert(flags.isSet(VALID_SRC)); return src; } 443 /// Accessor function to set the source index of the packet. 444 void setSrc(NodeID _src) { src = _src; flags.set(VALID_SRC); } 445 /// Reset source field, e.g. to retransmit packet on different bus. 446 void clearSrc() { flags.clear(VALID_SRC); } 447 448 bool isDestValid() { return flags.isSet(VALID_DST); } 449 /// Accessor function for the destination index of the packet. 450 NodeID getDest() const { assert(flags.isSet(VALID_DST)); return dest; } 451 /// Accessor function to set the destination index of the packet. 452 void setDest(NodeID _dest) { dest = _dest; flags.set(VALID_DST); } 453 454 Addr getAddr() const { assert(flags.isSet(VALID_ADDR)); return addr; } 455 unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; } 456 Addr getOffset(int blkSize) const { return getAddr() & (Addr)(blkSize - 1); } 457 458 /** 459 * Constructor. Note that a Request object must be constructed 460 * first, but the Requests's physical address and size fields need 461 * not be valid. The command and destination addresses must be 462 * supplied. 463 */ 464 Packet(Request *_req, MemCmd _cmd, NodeID _dest) 465 : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL), 466 dest(_dest), time(curTick), senderState(NULL) 467 { 468 if (req->hasPaddr()) { 469 addr = req->getPaddr(); 470 flags.set(VALID_ADDR); 471 } 472 if (req->hasSize()) { 473 size = req->getSize(); 474 flags.set(VALID_SIZE); 475 } 476 } 477 478 /** 479 * Alternate constructor if you are trying to create a packet with 480 * a request that is for a whole block, not the address from the 481 * req. this allows for overriding the size/addr of the req. 482 */ 483 Packet(Request *_req, MemCmd _cmd, NodeID _dest, int _blkSize) 484 : flags(VALID_DST), cmd(_cmd), req(_req), data(NULL), 485 dest(_dest), time(curTick), senderState(NULL) 486 { 487 if (req->hasPaddr()) { 488 addr = req->getPaddr() & ~(_blkSize - 1); 489 flags.set(VALID_ADDR); 490 } 491 size = _blkSize; 492 flags.set(VALID_SIZE); 493 } 494 495 /** 496 * Alternate constructor for copying a packet. Copy all fields 497 * *except* if the original packet's data was dynamic, don't copy 498 * that, as we can't guarantee that the new packet's lifetime is 499 * less than that of the original packet. In this case the new 500 * packet should allocate its own data. 501 */ 502 Packet(Packet *pkt, bool clearFlags = false) 503 : cmd(pkt->cmd), req(pkt->req), 504 data(pkt->flags.isSet(STATIC_DATA) ? pkt->data : NULL), 505 addr(pkt->addr), size(pkt->size), src(pkt->src), dest(pkt->dest), 506 time(curTick), senderState(pkt->senderState) 507 { 508 if (!clearFlags) 509 flags.set(pkt->flags & COPY_FLAGS); 510 511 flags.set(pkt->flags & (VALID_ADDR|VALID_SIZE|VALID_SRC|VALID_DST)); 512 flags.set(pkt->flags & STATIC_DATA); 513 } 514 515 /** 516 * clean up packet variables 517 */ 518 ~Packet() 519 { 520 // If this is a request packet for which there's no response, 521 // delete the request object here, since the requester will 522 // never get the chance. 523 if (req && isRequest() && !needsResponse()) 524 delete req; 525 deleteData(); 526 } 527 528 /** 529 * Reinitialize packet address and size from the associated 530 * Request object, and reset other fields that may have been 531 * modified by a previous transaction. Typically called when a 532 * statically allocated Request/Packet pair is reused for multiple 533 * transactions. 534 */ 535 void 536 reinitFromRequest() 537 { 538 assert(req->hasPaddr()); 539 flags = 0; 540 addr = req->getPaddr(); 541 size = req->getSize(); 542 time = req->time(); 543 544 flags.set(VALID_ADDR|VALID_SIZE); 545 deleteData(); 546 } 547 548 /** 549 * Take a request packet and modify it in place to be suitable for 550 * returning as a response to that request. The source and 551 * destination fields are *not* modified, as is appropriate for 552 * atomic accesses. 553 */ 554 void 555 makeResponse() 556 { 557 assert(needsResponse()); 558 assert(isRequest()); 559 origCmd = cmd; 560 cmd = cmd.responseCommand(); 561 562 dest = src; 563 flags.set(VALID_DST, flags.isSet(VALID_SRC)); 564 flags.clear(VALID_SRC); 565 } 566 567 void 568 makeAtomicResponse() 569 { 570 makeResponse(); 571 } 572 573 void 574 makeTimingResponse() 575 { 576 makeResponse(); 577 } 578 579 /** 580 * Take a request packet that has been returned as NACKED and 581 * modify it so that it can be sent out again. Only packets that 582 * need a response can be NACKED, so verify that that is true. 583 */ 584 void 585 reinitNacked() 586 { 587 assert(wasNacked()); 588 cmd = origCmd; 589 assert(needsResponse()); 590 setDest(Broadcast); 591 } 592 593 594 /** 595 * Set the data pointer to the following value that should not be 596 * freed. 597 */ 598 template <typename T> 599 void 600 dataStatic(T *p) 601 { 602 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA)); 603 data = (PacketDataPtr)p; 604 flags.set(STATIC_DATA); 605 } 606 607 /** 608 * Set the data pointer to a value that should have delete [] 609 * called on it. 610 */ 611 template <typename T> 612 void 613 dataDynamicArray(T *p) 614 { 615 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA)); 616 data = (PacketDataPtr)p; 617 flags.set(DYNAMIC_DATA|ARRAY_DATA); 618 } 619 620 /** 621 * set the data pointer to a value that should have delete called 622 * on it. 623 */ 624 template <typename T> 625 void 626 dataDynamic(T *p) 627 { 628 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA)); 629 data = (PacketDataPtr)p; 630 flags.set(DYNAMIC_DATA); 631 } 632 633 /** 634 * get a pointer to the data ptr. 635 */ 636 template <typename T> 637 T* 638 getPtr() 639 { 640 assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA)); 641 return (T*)data; 642 } 643 644 /** 645 * return the value of what is pointed to in the packet. 646 */ 647 template <typename T> 648 T get(); 649 650 /** 651 * set the value in the data pointer to v. 652 */ 653 template <typename T> 654 void set(T v); 655 656 /** 657 * Copy data into the packet from the provided pointer. 658 */ 659 void 660 setData(uint8_t *p) 661 { 662 std::memcpy(getPtr<uint8_t>(), p, getSize()); 663 } 664 665 /** 666 * Copy data into the packet from the provided block pointer, 667 * which is aligned to the given block size. 668 */ 669 void 670 setDataFromBlock(uint8_t *blk_data, int blkSize) 671 { 672 setData(blk_data + getOffset(blkSize)); 673 } 674 675 /** 676 * Copy data from the packet to the provided block pointer, which 677 * is aligned to the given block size. 678 */ 679 void 680 writeData(uint8_t *p) 681 { 682 std::memcpy(p, getPtr<uint8_t>(), getSize()); 683 } 684 685 /** 686 * Copy data from the packet to the memory at the provided pointer. 687 */ 688 void 689 writeDataToBlock(uint8_t *blk_data, int blkSize) 690 { 691 writeData(blk_data + getOffset(blkSize)); 692 } 693 694 /** 695 * delete the data pointed to in the data pointer. Ok to call to 696 * matter how data was allocted. 697 */ 698 void 699 deleteData() 700 { 701 if (flags.isSet(ARRAY_DATA)) 702 delete [] data; 703 else if (flags.isSet(DYNAMIC_DATA)) 704 delete data; 705 706 flags.clear(STATIC_DATA|DYNAMIC_DATA|ARRAY_DATA); 707 data = NULL; 708 } 709 710 /** If there isn't data in the packet, allocate some. */ 711 void 712 allocate() 713 { 714 if (data) { 715 assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA)); 716 return; 717 } 718 719 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA)); 720 flags.set(DYNAMIC_DATA|ARRAY_DATA); 721 data = new uint8_t[getSize()]; 722 } 723 724 725 /** 726 * Check a functional request against a memory value represented 727 * by a base/size pair and an associated data array. If the 728 * functional request is a read, it may be satisfied by the memory 729 * value. If the functional request is a write, it may update the 730 * memory value. 731 */ 732 bool checkFunctional(Printable *obj, Addr base, int size, uint8_t *data); 733 734 /** 735 * Check a functional request against a memory value stored in 736 * another packet (i.e. an in-transit request or response). 737 */ 738 bool 739 checkFunctional(PacketPtr other) 740 { 741 uint8_t *data = other->hasData() ? other->getPtr<uint8_t>() : NULL; 742 return checkFunctional(other, other->getAddr(), other->getSize(), 743 data); 744 } 745 746 /** 747 * Push label for PrintReq (safe to call unconditionally). 748 */ 749 void 750 pushLabel(const std::string &lbl) 751 { 752 if (isPrint()) 753 safe_cast<PrintReqState*>(senderState)->pushLabel(lbl); 754 } 755 756 /** 757 * Pop label for PrintReq (safe to call unconditionally). 758 */ 759 void 760 popLabel() 761 { 762 if (isPrint()) 763 safe_cast<PrintReqState*>(senderState)->popLabel(); 764 } 765 766 void print(std::ostream &o, int verbosity = 0, 767 const std::string &prefix = "") const; 768}; 769 770#endif //__MEM_PACKET_HH 771