packet.hh revision 3260
12381SN/A/* 22592SN/A * Copyright (c) 2006 The Regents of The University of Michigan 32381SN/A * All rights reserved. 42381SN/A * 52381SN/A * Redistribution and use in source and binary forms, with or without 62381SN/A * modification, are permitted provided that the following conditions are 72381SN/A * met: redistributions of source code must retain the above copyright 82381SN/A * notice, this list of conditions and the following disclaimer; 92381SN/A * redistributions in binary form must reproduce the above copyright 102381SN/A * notice, this list of conditions and the following disclaimer in the 112381SN/A * documentation and/or other materials provided with the distribution; 122381SN/A * neither the name of the copyright holders nor the names of its 132381SN/A * contributors may be used to endorse or promote products derived from 142381SN/A * this software without specific prior written permission. 152381SN/A * 162381SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172381SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182381SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192381SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202381SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212381SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222381SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232381SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242381SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252381SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262381SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Ron Dreslinski 292665Ssaidi@eecs.umich.edu * Steve Reinhardt 302665Ssaidi@eecs.umich.edu * Ali Saidi 312381SN/A */ 322381SN/A 332381SN/A/** 342381SN/A * @file 352662Sstever@eecs.umich.edu * Declaration of the Packet class. 362381SN/A */ 372381SN/A 382381SN/A#ifndef __MEM_PACKET_HH__ 392381SN/A#define __MEM_PACKET_HH__ 402381SN/A 412392SN/A#include "mem/request.hh" 422980Sgblack@eecs.umich.edu#include "sim/host.hh" 432394SN/A#include "sim/root.hh" 442812Srdreslin@umich.edu#include <list> 452989Ssaidi@eecs.umich.edu#include <cassert> 462394SN/A 472394SN/Astruct Packet; 482394SN/Atypedef Packet* PacketPtr; 492394SN/Atypedef uint8_t* PacketDataPtr; 502812Srdreslin@umich.edutypedef std::list<PacketPtr> PacketList; 512812Srdreslin@umich.edu 522812Srdreslin@umich.edu//Coherence Flags 532812Srdreslin@umich.edu#define NACKED_LINE 1 << 0 542812Srdreslin@umich.edu#define SATISFIED 1 << 1 552812Srdreslin@umich.edu#define SHARED_LINE 1 << 2 562813Srdreslin@umich.edu#define CACHE_LINE_FILL 1 << 3 572813Srdreslin@umich.edu#define COMPRESSED 1 << 4 582813Srdreslin@umich.edu#define NO_ALLOCATE 1 << 5 593074Srdreslin@umich.edu#define SNOOP_COMMIT 1 << 6 602382SN/A 613208Srdreslin@umich.edu//for now. @todo fix later 623214Srdreslin@umich.edu#define NUM_MEM_CMDS 1 << 11 632381SN/A/** 642662Sstever@eecs.umich.edu * A Packet is used to encapsulate a transfer between two objects in 652662Sstever@eecs.umich.edu * the memory system (e.g., the L1 and L2 cache). (In contrast, a 662662Sstever@eecs.umich.edu * single Request travels all the way from the requester to the 672662Sstever@eecs.umich.edu * ultimate destination and back, possibly being conveyed by several 682662Sstever@eecs.umich.edu * different Packets along the way.) 692381SN/A */ 702641Sstever@eecs.umich.educlass Packet 712381SN/A{ 722813Srdreslin@umich.edu public: 732813Srdreslin@umich.edu /** Temporary FLAGS field until cache gets working, this should be in coherence/sender state. */ 742813Srdreslin@umich.edu uint64_t flags; 752813Srdreslin@umich.edu 762566SN/A private: 772662Sstever@eecs.umich.edu /** A pointer to the data being transfered. It can be differnt 782662Sstever@eecs.umich.edu * sizes at each level of the heirarchy so it belongs in the 792662Sstever@eecs.umich.edu * packet, not request. This may or may not be populated when a 802662Sstever@eecs.umich.edu * responder recieves the packet. If not populated it memory 812662Sstever@eecs.umich.edu * should be allocated. 822566SN/A */ 832566SN/A PacketDataPtr data; 842566SN/A 852662Sstever@eecs.umich.edu /** Is the data pointer set to a value that shouldn't be freed 862662Sstever@eecs.umich.edu * when the packet is destroyed? */ 872566SN/A bool staticData; 882662Sstever@eecs.umich.edu /** The data pointer points to a value that should be freed when 892662Sstever@eecs.umich.edu * the packet is destroyed. */ 902566SN/A bool dynamicData; 912662Sstever@eecs.umich.edu /** the data pointer points to an array (thus delete [] ) needs to 922662Sstever@eecs.umich.edu * be called on it rather than simply delete.*/ 932566SN/A bool arrayData; 942566SN/A 952662Sstever@eecs.umich.edu /** The address of the request. This address could be virtual or 962662Sstever@eecs.umich.edu * physical, depending on the system configuration. */ 972381SN/A Addr addr; 982381SN/A 992662Sstever@eecs.umich.edu /** The size of the request or transfer. */ 1002381SN/A int size; 1012381SN/A 1022662Sstever@eecs.umich.edu /** Device address (e.g., bus ID) of the source of the 1032662Sstever@eecs.umich.edu * transaction. The source is not responsible for setting this 1042662Sstever@eecs.umich.edu * field; it is set implicitly by the interconnect when the 1052662Sstever@eecs.umich.edu * packet * is first sent. */ 1062381SN/A short src; 1072381SN/A 1082662Sstever@eecs.umich.edu /** Device address (e.g., bus ID) of the destination of the 1092662Sstever@eecs.umich.edu * transaction. The special value Broadcast indicates that the 1102662Sstever@eecs.umich.edu * packet should be routed based on its address. This field is 1112662Sstever@eecs.umich.edu * initialized in the constructor and is thus always valid 1122662Sstever@eecs.umich.edu * (unlike * addr, size, and src). */ 1132641Sstever@eecs.umich.edu short dest; 1142641Sstever@eecs.umich.edu 1152663Sstever@eecs.umich.edu /** Are the 'addr' and 'size' fields valid? */ 1162663Sstever@eecs.umich.edu bool addrSizeValid; 1172662Sstever@eecs.umich.edu /** Is the 'src' field valid? */ 1182641Sstever@eecs.umich.edu bool srcValid; 1192813Srdreslin@umich.edu 1202641Sstever@eecs.umich.edu 1212641Sstever@eecs.umich.edu public: 1222641Sstever@eecs.umich.edu 1232811Srdreslin@umich.edu /** Used to calculate latencies for each packet.*/ 1242811Srdreslin@umich.edu Tick time; 1252811Srdreslin@umich.edu 1263218Sgblack@eecs.umich.edu /** The time at which the packet will be fully transmitted */ 1273218Sgblack@eecs.umich.edu Tick finishTime; 1283218Sgblack@eecs.umich.edu 1293218Sgblack@eecs.umich.edu /** The time at which the first chunk of the packet will be transmitted */ 1303218Sgblack@eecs.umich.edu Tick firstWordTime; 1313218Sgblack@eecs.umich.edu 1322662Sstever@eecs.umich.edu /** The special destination address indicating that the packet 1332662Sstever@eecs.umich.edu * should be routed based on its address. */ 1342623SN/A static const short Broadcast = -1; 1352623SN/A 1362662Sstever@eecs.umich.edu /** A pointer to the original request. */ 1372641Sstever@eecs.umich.edu RequestPtr req; 1382641Sstever@eecs.umich.edu 1392662Sstever@eecs.umich.edu /** A virtual base opaque structure used to hold coherence-related 1402662Sstever@eecs.umich.edu * state. A specific subclass would be derived from this to 1412662Sstever@eecs.umich.edu * carry state specific to a particular coherence protocol. */ 1422641Sstever@eecs.umich.edu class CoherenceState { 1432641Sstever@eecs.umich.edu public: 1442641Sstever@eecs.umich.edu virtual ~CoherenceState() {} 1452641Sstever@eecs.umich.edu }; 1462641Sstever@eecs.umich.edu 1472662Sstever@eecs.umich.edu /** This packet's coherence state. Caches should use 1482662Sstever@eecs.umich.edu * dynamic_cast<> to cast to the state appropriate for the 1492662Sstever@eecs.umich.edu * system's coherence protocol. */ 1502662Sstever@eecs.umich.edu CoherenceState *coherence; 1512641Sstever@eecs.umich.edu 1522662Sstever@eecs.umich.edu /** A virtual base opaque structure used to hold state associated 1532662Sstever@eecs.umich.edu * with the packet but specific to the sending device (e.g., an 1542662Sstever@eecs.umich.edu * MSHR). A pointer to this state is returned in the packet's 1552662Sstever@eecs.umich.edu * response so that the sender can quickly look up the state 1562662Sstever@eecs.umich.edu * needed to process it. A specific subclass would be derived 1572662Sstever@eecs.umich.edu * from this to carry state specific to a particular sending 1582662Sstever@eecs.umich.edu * device. */ 1592641Sstever@eecs.umich.edu class SenderState { 1602641Sstever@eecs.umich.edu public: 1612641Sstever@eecs.umich.edu virtual ~SenderState() {} 1622641Sstever@eecs.umich.edu }; 1632641Sstever@eecs.umich.edu 1642662Sstever@eecs.umich.edu /** This packet's sender state. Devices should use dynamic_cast<> 1652662Sstever@eecs.umich.edu * to cast to the state appropriate to the sender. */ 1662662Sstever@eecs.umich.edu SenderState *senderState; 1672641Sstever@eecs.umich.edu 1682641Sstever@eecs.umich.edu private: 1692641Sstever@eecs.umich.edu /** List of command attributes. */ 1703158Sgblack@eecs.umich.edu // If you add a new CommandAttribute, make sure to increase NUM_MEM_CMDS 1713158Sgblack@eecs.umich.edu // as well. 1722641Sstever@eecs.umich.edu enum CommandAttribute 1732641Sstever@eecs.umich.edu { 1743260Ssaidi@eecs.umich.edu IsRead = 1 << 0, 1753260Ssaidi@eecs.umich.edu IsWrite = 1 << 1, 1763260Ssaidi@eecs.umich.edu IsPrefetch = 1 << 2, 1773260Ssaidi@eecs.umich.edu IsInvalidate = 1 << 3, 1783260Ssaidi@eecs.umich.edu IsRequest = 1 << 4, 1793260Ssaidi@eecs.umich.edu IsResponse = 1 << 5, 1803260Ssaidi@eecs.umich.edu NeedsResponse = 1 << 6, 1812811Srdreslin@umich.edu IsSWPrefetch = 1 << 7, 1823156Sgblack@eecs.umich.edu IsHWPrefetch = 1 << 8, 1833214Srdreslin@umich.edu IsUpgrade = 1 << 9, 1843260Ssaidi@eecs.umich.edu HasData = 1 << 10 1852641Sstever@eecs.umich.edu }; 1862641Sstever@eecs.umich.edu 1872641Sstever@eecs.umich.edu public: 1882641Sstever@eecs.umich.edu /** List of all commands associated with a packet. */ 1892641Sstever@eecs.umich.edu enum Command 1902641Sstever@eecs.umich.edu { 1912813Srdreslin@umich.edu InvalidCmd = 0, 1923260Ssaidi@eecs.umich.edu ReadReq = IsRead | IsRequest | NeedsResponse, 1933260Ssaidi@eecs.umich.edu WriteReq = IsWrite | IsRequest | NeedsResponse | HasData, 1943260Ssaidi@eecs.umich.edu WriteReqNoAck = IsWrite | IsRequest | HasData, 1953260Ssaidi@eecs.umich.edu ReadResp = IsRead | IsResponse | NeedsResponse | HasData, 1963260Ssaidi@eecs.umich.edu WriteResp = IsWrite | IsResponse | NeedsResponse, 1973158Sgblack@eecs.umich.edu Writeback = IsWrite | IsRequest | HasData, 1982811Srdreslin@umich.edu SoftPFReq = IsRead | IsRequest | IsSWPrefetch | NeedsResponse, 1992811Srdreslin@umich.edu HardPFReq = IsRead | IsRequest | IsHWPrefetch | NeedsResponse, 2003156Sgblack@eecs.umich.edu SoftPFResp = IsRead | IsResponse | IsSWPrefetch 2013158Sgblack@eecs.umich.edu | NeedsResponse | HasData, 2023156Sgblack@eecs.umich.edu HardPFResp = IsRead | IsResponse | IsHWPrefetch 2033260Ssaidi@eecs.umich.edu | NeedsResponse | HasData, 2042812Srdreslin@umich.edu InvalidateReq = IsInvalidate | IsRequest, 2053158Sgblack@eecs.umich.edu WriteInvalidateReq = IsWrite | IsInvalidate | IsRequest | HasData, 2063207Srdreslin@umich.edu UpgradeReq = IsInvalidate | IsRequest | IsUpgrade, 2072855Srdreslin@umich.edu ReadExReq = IsRead | IsInvalidate | IsRequest | NeedsResponse, 2083156Sgblack@eecs.umich.edu ReadExResp = IsRead | IsInvalidate | IsResponse 2093158Sgblack@eecs.umich.edu | NeedsResponse | HasData 2102641Sstever@eecs.umich.edu }; 2112641Sstever@eecs.umich.edu 2122662Sstever@eecs.umich.edu /** Return the string name of the cmd field (for debugging and 2132662Sstever@eecs.umich.edu * tracing). */ 2142641Sstever@eecs.umich.edu const std::string &cmdString() const; 2152381SN/A 2162811Srdreslin@umich.edu /** Reutrn the string to a cmd given by idx. */ 2172811Srdreslin@umich.edu const std::string &cmdIdxToString(Command idx); 2182811Srdreslin@umich.edu 2192811Srdreslin@umich.edu /** Return the index of this command. */ 2202811Srdreslin@umich.edu inline int cmdToIndex() const { return (int) cmd; } 2212811Srdreslin@umich.edu 2222662Sstever@eecs.umich.edu /** The command field of the packet. */ 2232381SN/A Command cmd; 2242381SN/A 2253260Ssaidi@eecs.umich.edu bool isRead() const { return (cmd & IsRead) != 0; } 2263260Ssaidi@eecs.umich.edu bool isWrite() const { return (cmd & IsWrite) != 0; } 2273260Ssaidi@eecs.umich.edu bool isRequest() const { return (cmd & IsRequest) != 0; } 2283260Ssaidi@eecs.umich.edu bool isResponse() const { return (cmd & IsResponse) != 0; } 2293260Ssaidi@eecs.umich.edu bool needsResponse() const { return (cmd & NeedsResponse) != 0; } 2303260Ssaidi@eecs.umich.edu bool isInvalidate() const { return (cmd & IsInvalidate) != 0; } 2313260Ssaidi@eecs.umich.edu bool hasData() const { return (cmd & HasData) != 0; } 2322812Srdreslin@umich.edu 2333260Ssaidi@eecs.umich.edu bool isCacheFill() const { return (flags & CACHE_LINE_FILL) != 0; } 2343260Ssaidi@eecs.umich.edu bool isNoAllocate() const { return (flags & NO_ALLOCATE) != 0; } 2353260Ssaidi@eecs.umich.edu bool isCompressed() const { return (flags & COMPRESSED) != 0; } 2362814Srdreslin@umich.edu 2373039Sstever@eecs.umich.edu bool nic_pkt() { assert("Unimplemented\n" && 0); return false; } 2382641Sstever@eecs.umich.edu 2392662Sstever@eecs.umich.edu /** Possible results of a packet's request. */ 2402641Sstever@eecs.umich.edu enum Result 2412641Sstever@eecs.umich.edu { 2422641Sstever@eecs.umich.edu Success, 2432641Sstever@eecs.umich.edu BadAddress, 2442685Ssaidi@eecs.umich.edu Nacked, 2452641Sstever@eecs.umich.edu Unknown 2462641Sstever@eecs.umich.edu }; 2472641Sstever@eecs.umich.edu 2482662Sstever@eecs.umich.edu /** The result of this packet's request. */ 2492641Sstever@eecs.umich.edu Result result; 2502381SN/A 2512381SN/A /** Accessor function that returns the source index of the packet. */ 2522641Sstever@eecs.umich.edu short getSrc() const { assert(srcValid); return src; } 2532641Sstever@eecs.umich.edu void setSrc(short _src) { src = _src; srcValid = true; } 2542381SN/A 2552381SN/A /** Accessor function that returns the destination index of 2562381SN/A the packet. */ 2572381SN/A short getDest() const { return dest; } 2582641Sstever@eecs.umich.edu void setDest(short _dest) { dest = _dest; } 2592549SN/A 2602663Sstever@eecs.umich.edu Addr getAddr() const { assert(addrSizeValid); return addr; } 2612663Sstever@eecs.umich.edu int getSize() const { assert(addrSizeValid); return size; } 2622883Srdreslin@umich.edu Addr getOffset(int blkSize) const { return addr & (Addr)(blkSize - 1); } 2632813Srdreslin@umich.edu 2642813Srdreslin@umich.edu void addrOverride(Addr newAddr) { assert(addrSizeValid); addr = newAddr; } 2652813Srdreslin@umich.edu void cmdOverride(Command newCmd) { cmd = newCmd; } 2662641Sstever@eecs.umich.edu 2672662Sstever@eecs.umich.edu /** Constructor. Note that a Request object must be constructed 2682662Sstever@eecs.umich.edu * first, but the Requests's physical address and size fields 2692662Sstever@eecs.umich.edu * need not be valid. The command and destination addresses 2702662Sstever@eecs.umich.edu * must be supplied. */ 2712641Sstever@eecs.umich.edu Packet(Request *_req, Command _cmd, short _dest) 2722566SN/A : data(NULL), staticData(false), dynamicData(false), arrayData(false), 2732641Sstever@eecs.umich.edu addr(_req->paddr), size(_req->size), dest(_dest), 2742663Sstever@eecs.umich.edu addrSizeValid(_req->validPaddr), 2752814Srdreslin@umich.edu srcValid(false), 2762641Sstever@eecs.umich.edu req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), 2772662Sstever@eecs.umich.edu result(Unknown) 2782641Sstever@eecs.umich.edu { 2792813Srdreslin@umich.edu flags = 0; 2803018Srdreslin@umich.edu time = curTick; 2812813Srdreslin@umich.edu } 2822813Srdreslin@umich.edu 2832813Srdreslin@umich.edu /** Alternate constructor if you are trying to create a packet with 2842813Srdreslin@umich.edu * a request that is for a whole block, not the address from the req. 2852813Srdreslin@umich.edu * this allows for overriding the size/addr of the req.*/ 2862813Srdreslin@umich.edu Packet(Request *_req, Command _cmd, short _dest, int _blkSize) 2872813Srdreslin@umich.edu : data(NULL), staticData(false), dynamicData(false), arrayData(false), 2882813Srdreslin@umich.edu addr(_req->paddr & ~(_blkSize - 1)), size(_blkSize), 2892814Srdreslin@umich.edu dest(_dest), 2902814Srdreslin@umich.edu addrSizeValid(_req->validPaddr), srcValid(false), 2912813Srdreslin@umich.edu req(_req), coherence(NULL), senderState(NULL), cmd(_cmd), 2922813Srdreslin@umich.edu result(Unknown) 2932813Srdreslin@umich.edu { 2942813Srdreslin@umich.edu flags = 0; 2953018Srdreslin@umich.edu time = curTick; 2962641Sstever@eecs.umich.edu } 2972549SN/A 2982662Sstever@eecs.umich.edu /** Destructor. */ 2992566SN/A ~Packet() 3002566SN/A { deleteData(); } 3012566SN/A 3022662Sstever@eecs.umich.edu /** Reinitialize packet address and size from the associated 3032662Sstever@eecs.umich.edu * Request object, and reset other fields that may have been 3042662Sstever@eecs.umich.edu * modified by a previous transaction. Typically called when a 3052662Sstever@eecs.umich.edu * statically allocated Request/Packet pair is reused for 3062662Sstever@eecs.umich.edu * multiple transactions. */ 3072662Sstever@eecs.umich.edu void reinitFromRequest() { 3082662Sstever@eecs.umich.edu assert(req->validPaddr); 3092663Sstever@eecs.umich.edu addr = req->paddr; 3102663Sstever@eecs.umich.edu size = req->size; 3113018Srdreslin@umich.edu time = req->time; 3122663Sstever@eecs.umich.edu addrSizeValid = true; 3132662Sstever@eecs.umich.edu result = Unknown; 3142662Sstever@eecs.umich.edu if (dynamicData) { 3152662Sstever@eecs.umich.edu deleteData(); 3162662Sstever@eecs.umich.edu dynamicData = false; 3172662Sstever@eecs.umich.edu arrayData = false; 3182662Sstever@eecs.umich.edu } 3192662Sstever@eecs.umich.edu } 3202566SN/A 3212662Sstever@eecs.umich.edu /** Take a request packet and modify it in place to be suitable 3222662Sstever@eecs.umich.edu * for returning as a response to that request. Used for timing 3232662Sstever@eecs.umich.edu * accesses only. For atomic and functional accesses, the 3242662Sstever@eecs.umich.edu * request packet is always implicitly passed back *without* 3253135Srdreslin@umich.edu * modifying the destination fields, so this function 3262662Sstever@eecs.umich.edu * should not be called. */ 3272662Sstever@eecs.umich.edu void makeTimingResponse() { 3282662Sstever@eecs.umich.edu assert(needsResponse()); 3292855Srdreslin@umich.edu assert(isRequest()); 3302662Sstever@eecs.umich.edu int icmd = (int)cmd; 3312855Srdreslin@umich.edu icmd &= ~(IsRequest); 3322662Sstever@eecs.umich.edu icmd |= IsResponse; 3333216Srdreslin@umich.edu if (isRead()) 3343216Srdreslin@umich.edu icmd |= HasData; 3353217Srdreslin@umich.edu if (isWrite()) 3363217Srdreslin@umich.edu icmd &= ~HasData; 3372662Sstever@eecs.umich.edu cmd = (Command)icmd; 3382662Sstever@eecs.umich.edu dest = src; 3392662Sstever@eecs.umich.edu srcValid = false; 3402641Sstever@eecs.umich.edu } 3412641Sstever@eecs.umich.edu 3423135Srdreslin@umich.edu /** Take a request packet and modify it in place to be suitable 3433135Srdreslin@umich.edu * for returning as a response to that request. 3443135Srdreslin@umich.edu */ 3453135Srdreslin@umich.edu void makeAtomicResponse() { 3463135Srdreslin@umich.edu assert(needsResponse()); 3473135Srdreslin@umich.edu assert(isRequest()); 3483135Srdreslin@umich.edu int icmd = (int)cmd; 3493135Srdreslin@umich.edu icmd &= ~(IsRequest); 3503135Srdreslin@umich.edu icmd |= IsResponse; 3513135Srdreslin@umich.edu cmd = (Command)icmd; 3523135Srdreslin@umich.edu } 3533135Srdreslin@umich.edu 3542685Ssaidi@eecs.umich.edu /** Take a request packet that has been returned as NACKED and modify it so 3552685Ssaidi@eecs.umich.edu * that it can be sent out again. Only packets that need a response can be 3562685Ssaidi@eecs.umich.edu * NACKED, so verify that that is true. */ 3572685Ssaidi@eecs.umich.edu void reinitNacked() { 3582685Ssaidi@eecs.umich.edu assert(needsResponse() && result == Nacked); 3592685Ssaidi@eecs.umich.edu dest = Broadcast; 3602685Ssaidi@eecs.umich.edu result = Unknown; 3612685Ssaidi@eecs.umich.edu } 3622685Ssaidi@eecs.umich.edu 3632685Ssaidi@eecs.umich.edu 3642566SN/A /** Set the data pointer to the following value that should not be freed. */ 3652566SN/A template <typename T> 3662592SN/A void dataStatic(T *p); 3672566SN/A 3682566SN/A /** Set the data pointer to a value that should have delete [] called on it. 3692566SN/A */ 3702566SN/A template <typename T> 3712592SN/A void dataDynamicArray(T *p); 3722566SN/A 3732566SN/A /** set the data pointer to a value that should have delete called on it. */ 3742566SN/A template <typename T> 3752592SN/A void dataDynamic(T *p); 3762566SN/A 3772566SN/A /** return the value of what is pointed to in the packet. */ 3782566SN/A template <typename T> 3792592SN/A T get(); 3802566SN/A 3812566SN/A /** get a pointer to the data ptr. */ 3822566SN/A template <typename T> 3832592SN/A T* getPtr(); 3842566SN/A 3852566SN/A /** set the value in the data pointer to v. */ 3862566SN/A template <typename T> 3872592SN/A void set(T v); 3882566SN/A 3892566SN/A /** delete the data pointed to in the data pointer. Ok to call to matter how 3902566SN/A * data was allocted. */ 3912592SN/A void deleteData(); 3922566SN/A 3932566SN/A /** If there isn't data in the packet, allocate some. */ 3942592SN/A void allocate(); 3952568SN/A 3962568SN/A /** Do the packet modify the same addresses. */ 3972592SN/A bool intersect(Packet *p); 3982381SN/A}; 3992381SN/A 4003260Ssaidi@eecs.umich.edu 4013260Ssaidi@eecs.umich.edu/** This function given a functional packet and a timing packet either satisfies 4023260Ssaidi@eecs.umich.edu * the timing packet, or updates the timing packet to reflect the updated state 4033260Ssaidi@eecs.umich.edu * in the timing packet. It returns if the functional packet should continue to 4043260Ssaidi@eecs.umich.edu * traverse the memory hierarchy or not. 4053260Ssaidi@eecs.umich.edu */ 4062630SN/Abool fixPacket(Packet *func, Packet *timing); 4073260Ssaidi@eecs.umich.edu 4083260Ssaidi@eecs.umich.edustd::ostream & operator<<(std::ostream &o, const Packet &p); 4093260Ssaidi@eecs.umich.edu 4102381SN/A#endif //__MEM_PACKET_HH 411