packet.hh revision 5314
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 413348Sbinkertn@umich.edu#include <cassert> 423348Sbinkertn@umich.edu#include <list> 434022Sstever@eecs.umich.edu#include <bitset> 443348Sbinkertn@umich.edu 454024Sbinkertn@umich.edu#include "base/compiler.hh" 464610Ssaidi@eecs.umich.edu#include "base/fast_alloc.hh" 473940Ssaidi@eecs.umich.edu#include "base/misc.hh" 485314Sstever@gmail.com#include "base/printable.hh" 492392SN/A#include "mem/request.hh" 502980Sgblack@eecs.umich.edu#include "sim/host.hh" 514167Sbinkertn@umich.edu#include "sim/core.hh" 522394SN/A 533940Ssaidi@eecs.umich.edu 542394SN/Astruct Packet; 553349Sbinkertn@umich.edutypedef Packet *PacketPtr; 562394SN/Atypedef uint8_t* PacketDataPtr; 572812Srdreslin@umich.edutypedef std::list<PacketPtr> PacketList; 582812Srdreslin@umich.edu 594022Sstever@eecs.umich.educlass MemCmd 604022Sstever@eecs.umich.edu{ 614022Sstever@eecs.umich.edu public: 624022Sstever@eecs.umich.edu 634022Sstever@eecs.umich.edu /** List of all commands associated with a packet. */ 644022Sstever@eecs.umich.edu enum Command 654022Sstever@eecs.umich.edu { 664022Sstever@eecs.umich.edu InvalidCmd, 674022Sstever@eecs.umich.edu ReadReq, 684473Sstever@eecs.umich.edu ReadResp, 694022Sstever@eecs.umich.edu WriteReq, 704022Sstever@eecs.umich.edu WriteResp, 714022Sstever@eecs.umich.edu Writeback, 724022Sstever@eecs.umich.edu SoftPFReq, 734022Sstever@eecs.umich.edu HardPFReq, 744022Sstever@eecs.umich.edu SoftPFResp, 754022Sstever@eecs.umich.edu HardPFResp, 764022Sstever@eecs.umich.edu WriteInvalidateReq, 774022Sstever@eecs.umich.edu WriteInvalidateResp, 784022Sstever@eecs.umich.edu UpgradeReq, 794628Sstever@eecs.umich.edu UpgradeResp, 804022Sstever@eecs.umich.edu ReadExReq, 814022Sstever@eecs.umich.edu ReadExResp, 824626Sstever@eecs.umich.edu LoadLockedReq, 834626Sstever@eecs.umich.edu LoadLockedResp, 844626Sstever@eecs.umich.edu StoreCondReq, 854626Sstever@eecs.umich.edu StoreCondResp, 864040Ssaidi@eecs.umich.edu SwapReq, 874040Ssaidi@eecs.umich.edu SwapResp, 884870Sstever@eecs.umich.edu // Error responses 894870Sstever@eecs.umich.edu // @TODO these should be classified as responses rather than 904870Sstever@eecs.umich.edu // requests; coding them as requests initially for backwards 914870Sstever@eecs.umich.edu // compatibility 924870Sstever@eecs.umich.edu NetworkNackError, // nacked at network layer (not by protocol) 934870Sstever@eecs.umich.edu InvalidDestError, // packet dest field invalid 944870Sstever@eecs.umich.edu BadAddressError, // memory address invalid 955314Sstever@gmail.com // Fake simulator-only commands 965314Sstever@gmail.com PrintReq, // Print state matching address 974022Sstever@eecs.umich.edu NUM_MEM_CMDS 984022Sstever@eecs.umich.edu }; 994022Sstever@eecs.umich.edu 1004022Sstever@eecs.umich.edu private: 1014022Sstever@eecs.umich.edu /** List of command attributes. */ 1024022Sstever@eecs.umich.edu enum Attribute 1034022Sstever@eecs.umich.edu { 1044626Sstever@eecs.umich.edu IsRead, //!< Data flows from responder to requester 1054626Sstever@eecs.umich.edu IsWrite, //!< Data flows from requester to responder 1064626Sstever@eecs.umich.edu IsPrefetch, //!< Not a demand access 1074022Sstever@eecs.umich.edu IsInvalidate, 1084626Sstever@eecs.umich.edu NeedsExclusive, //!< Requires exclusive copy to complete in-cache 1094626Sstever@eecs.umich.edu IsRequest, //!< Issued by requester 1104626Sstever@eecs.umich.edu IsResponse, //!< Issue by responder 1114626Sstever@eecs.umich.edu NeedsResponse, //!< Requester needs response from target 1124022Sstever@eecs.umich.edu IsSWPrefetch, 1134022Sstever@eecs.umich.edu IsHWPrefetch, 1144626Sstever@eecs.umich.edu IsLocked, //!< Alpha/MIPS LL or SC access 1154626Sstever@eecs.umich.edu HasData, //!< There is an associated payload 1164870Sstever@eecs.umich.edu IsError, //!< Error response 1175314Sstever@gmail.com IsPrint, //!< Print state matching address (for debugging) 1184022Sstever@eecs.umich.edu NUM_COMMAND_ATTRIBUTES 1194022Sstever@eecs.umich.edu }; 1204022Sstever@eecs.umich.edu 1214022Sstever@eecs.umich.edu /** Structure that defines attributes and other data associated 1224022Sstever@eecs.umich.edu * with a Command. */ 1234022Sstever@eecs.umich.edu struct CommandInfo { 1244022Sstever@eecs.umich.edu /** Set of attribute flags. */ 1254022Sstever@eecs.umich.edu const std::bitset<NUM_COMMAND_ATTRIBUTES> attributes; 1264022Sstever@eecs.umich.edu /** Corresponding response for requests; InvalidCmd if no 1274022Sstever@eecs.umich.edu * response is applicable. */ 1284022Sstever@eecs.umich.edu const Command response; 1294022Sstever@eecs.umich.edu /** String representation (for printing) */ 1304022Sstever@eecs.umich.edu const std::string str; 1314022Sstever@eecs.umich.edu }; 1324022Sstever@eecs.umich.edu 1334022Sstever@eecs.umich.edu /** Array to map Command enum to associated info. */ 1344022Sstever@eecs.umich.edu static const CommandInfo commandInfo[]; 1354022Sstever@eecs.umich.edu 1364022Sstever@eecs.umich.edu private: 1374022Sstever@eecs.umich.edu 1384022Sstever@eecs.umich.edu Command cmd; 1394022Sstever@eecs.umich.edu 1404022Sstever@eecs.umich.edu bool testCmdAttrib(MemCmd::Attribute attrib) const { 1414022Sstever@eecs.umich.edu return commandInfo[cmd].attributes[attrib] != 0; 1424022Sstever@eecs.umich.edu } 1434022Sstever@eecs.umich.edu 1444022Sstever@eecs.umich.edu public: 1454022Sstever@eecs.umich.edu 1464022Sstever@eecs.umich.edu bool isRead() const { return testCmdAttrib(IsRead); } 1474022Sstever@eecs.umich.edu bool isWrite() const { return testCmdAttrib(IsWrite); } 1484022Sstever@eecs.umich.edu bool isRequest() const { return testCmdAttrib(IsRequest); } 1494022Sstever@eecs.umich.edu bool isResponse() const { return testCmdAttrib(IsResponse); } 1504870Sstever@eecs.umich.edu bool needsExclusive() const { return testCmdAttrib(NeedsExclusive); } 1514022Sstever@eecs.umich.edu bool needsResponse() const { return testCmdAttrib(NeedsResponse); } 1524022Sstever@eecs.umich.edu bool isInvalidate() const { return testCmdAttrib(IsInvalidate); } 1534022Sstever@eecs.umich.edu bool hasData() const { return testCmdAttrib(HasData); } 1544626Sstever@eecs.umich.edu bool isReadWrite() const { return isRead() && isWrite(); } 1554626Sstever@eecs.umich.edu bool isLocked() const { return testCmdAttrib(IsLocked); } 1564870Sstever@eecs.umich.edu bool isError() const { return testCmdAttrib(IsError); } 1575314Sstever@gmail.com bool isPrint() const { return testCmdAttrib(IsPrint); } 1584022Sstever@eecs.umich.edu 1594022Sstever@eecs.umich.edu const Command responseCommand() const { 1604022Sstever@eecs.umich.edu return commandInfo[cmd].response; 1614022Sstever@eecs.umich.edu } 1624022Sstever@eecs.umich.edu 1634022Sstever@eecs.umich.edu /** Return the string to a cmd given by idx. */ 1644022Sstever@eecs.umich.edu const std::string &toString() const { 1654022Sstever@eecs.umich.edu return commandInfo[cmd].str; 1664022Sstever@eecs.umich.edu } 1674022Sstever@eecs.umich.edu 1684022Sstever@eecs.umich.edu int toInt() const { return (int)cmd; } 1694022Sstever@eecs.umich.edu 1704022Sstever@eecs.umich.edu MemCmd(Command _cmd) 1714022Sstever@eecs.umich.edu : cmd(_cmd) 1724022Sstever@eecs.umich.edu { } 1734022Sstever@eecs.umich.edu 1744022Sstever@eecs.umich.edu MemCmd(int _cmd) 1754022Sstever@eecs.umich.edu : cmd((Command)_cmd) 1764022Sstever@eecs.umich.edu { } 1774022Sstever@eecs.umich.edu 1784022Sstever@eecs.umich.edu MemCmd() 1794022Sstever@eecs.umich.edu : cmd(InvalidCmd) 1804022Sstever@eecs.umich.edu { } 1814022Sstever@eecs.umich.edu 1824022Sstever@eecs.umich.edu bool operator==(MemCmd c2) { return (cmd == c2.cmd); } 1834022Sstever@eecs.umich.edu bool operator!=(MemCmd c2) { return (cmd != c2.cmd); } 1844022Sstever@eecs.umich.edu 1854022Sstever@eecs.umich.edu friend class Packet; 1864022Sstever@eecs.umich.edu}; 1874022Sstever@eecs.umich.edu 1882381SN/A/** 1892662Sstever@eecs.umich.edu * A Packet is used to encapsulate a transfer between two objects in 1902662Sstever@eecs.umich.edu * the memory system (e.g., the L1 and L2 cache). (In contrast, a 1912662Sstever@eecs.umich.edu * single Request travels all the way from the requester to the 1922662Sstever@eecs.umich.edu * ultimate destination and back, possibly being conveyed by several 1932662Sstever@eecs.umich.edu * different Packets along the way.) 1942381SN/A */ 1955314Sstever@gmail.comclass Packet : public FastAlloc, public Printable 1962381SN/A{ 1972813Srdreslin@umich.edu public: 1984022Sstever@eecs.umich.edu 1994022Sstever@eecs.umich.edu typedef MemCmd::Command Command; 2004022Sstever@eecs.umich.edu 2014870Sstever@eecs.umich.edu /** The command field of the packet. */ 2024870Sstever@eecs.umich.edu MemCmd cmd; 2034870Sstever@eecs.umich.edu 2044870Sstever@eecs.umich.edu /** A pointer to the original request. */ 2054870Sstever@eecs.umich.edu RequestPtr req; 2064870Sstever@eecs.umich.edu 2072566SN/A private: 2082662Sstever@eecs.umich.edu /** A pointer to the data being transfered. It can be differnt 2092662Sstever@eecs.umich.edu * sizes at each level of the heirarchy so it belongs in the 2102662Sstever@eecs.umich.edu * packet, not request. This may or may not be populated when a 2112662Sstever@eecs.umich.edu * responder recieves the packet. If not populated it memory 2122662Sstever@eecs.umich.edu * should be allocated. 2132566SN/A */ 2142566SN/A PacketDataPtr data; 2152566SN/A 2162662Sstever@eecs.umich.edu /** Is the data pointer set to a value that shouldn't be freed 2172662Sstever@eecs.umich.edu * when the packet is destroyed? */ 2182566SN/A bool staticData; 2192662Sstever@eecs.umich.edu /** The data pointer points to a value that should be freed when 2202662Sstever@eecs.umich.edu * the packet is destroyed. */ 2212566SN/A bool dynamicData; 2222662Sstever@eecs.umich.edu /** the data pointer points to an array (thus delete [] ) needs to 2232662Sstever@eecs.umich.edu * be called on it rather than simply delete.*/ 2242566SN/A bool arrayData; 2252566SN/A 2262662Sstever@eecs.umich.edu /** The address of the request. This address could be virtual or 2272662Sstever@eecs.umich.edu * physical, depending on the system configuration. */ 2282381SN/A Addr addr; 2292381SN/A 2302662Sstever@eecs.umich.edu /** The size of the request or transfer. */ 2312381SN/A int size; 2322381SN/A 2332662Sstever@eecs.umich.edu /** Device address (e.g., bus ID) of the source of the 2342662Sstever@eecs.umich.edu * transaction. The source is not responsible for setting this 2352662Sstever@eecs.umich.edu * field; it is set implicitly by the interconnect when the 2363349Sbinkertn@umich.edu * packet is first sent. */ 2372381SN/A short src; 2382381SN/A 2392662Sstever@eecs.umich.edu /** Device address (e.g., bus ID) of the destination of the 2402662Sstever@eecs.umich.edu * transaction. The special value Broadcast indicates that the 2412662Sstever@eecs.umich.edu * packet should be routed based on its address. This field is 2422662Sstever@eecs.umich.edu * initialized in the constructor and is thus always valid 2432662Sstever@eecs.umich.edu * (unlike * addr, size, and src). */ 2442641Sstever@eecs.umich.edu short dest; 2452641Sstever@eecs.umich.edu 2464870Sstever@eecs.umich.edu /** The original value of the command field. Only valid when the 2474870Sstever@eecs.umich.edu * current command field is an error condition; in that case, the 2484870Sstever@eecs.umich.edu * previous contents of the command field are copied here. This 2494870Sstever@eecs.umich.edu * field is *not* set on non-error responses. 2504870Sstever@eecs.umich.edu */ 2514870Sstever@eecs.umich.edu MemCmd origCmd; 2524870Sstever@eecs.umich.edu 2532663Sstever@eecs.umich.edu /** Are the 'addr' and 'size' fields valid? */ 2542663Sstever@eecs.umich.edu bool addrSizeValid; 2552662Sstever@eecs.umich.edu /** Is the 'src' field valid? */ 2562641Sstever@eecs.umich.edu bool srcValid; 2574870Sstever@eecs.umich.edu bool destValid; 2582813Srdreslin@umich.edu 2594870Sstever@eecs.umich.edu enum Flag { 2604895Sstever@eecs.umich.edu // Snoop response flags 2614626Sstever@eecs.umich.edu MemInhibit, 2624626Sstever@eecs.umich.edu Shared, 2634895Sstever@eecs.umich.edu // Special control flags 2644916Sstever@eecs.umich.edu /// Special timing-mode atomic snoop for multi-level coherence. 2654895Sstever@eecs.umich.edu ExpressSnoop, 2664916Sstever@eecs.umich.edu /// Does supplier have exclusive copy? 2674916Sstever@eecs.umich.edu /// Useful for multi-level coherence. 2684916Sstever@eecs.umich.edu SupplyExclusive, 2694870Sstever@eecs.umich.edu NUM_PACKET_FLAGS 2704626Sstever@eecs.umich.edu }; 2714626Sstever@eecs.umich.edu 2724870Sstever@eecs.umich.edu /** Status flags */ 2734870Sstever@eecs.umich.edu std::bitset<NUM_PACKET_FLAGS> flags; 2742641Sstever@eecs.umich.edu 2752641Sstever@eecs.umich.edu public: 2762641Sstever@eecs.umich.edu 2772811Srdreslin@umich.edu /** Used to calculate latencies for each packet.*/ 2782811Srdreslin@umich.edu Tick time; 2792811Srdreslin@umich.edu 2803218Sgblack@eecs.umich.edu /** The time at which the packet will be fully transmitted */ 2813218Sgblack@eecs.umich.edu Tick finishTime; 2823218Sgblack@eecs.umich.edu 2833218Sgblack@eecs.umich.edu /** The time at which the first chunk of the packet will be transmitted */ 2843218Sgblack@eecs.umich.edu Tick firstWordTime; 2853218Sgblack@eecs.umich.edu 2862662Sstever@eecs.umich.edu /** The special destination address indicating that the packet 2872662Sstever@eecs.umich.edu * should be routed based on its address. */ 2882623SN/A static const short Broadcast = -1; 2892623SN/A 2902662Sstever@eecs.umich.edu /** A virtual base opaque structure used to hold state associated 2912662Sstever@eecs.umich.edu * with the packet but specific to the sending device (e.g., an 2922662Sstever@eecs.umich.edu * MSHR). A pointer to this state is returned in the packet's 2932662Sstever@eecs.umich.edu * response so that the sender can quickly look up the state 2942662Sstever@eecs.umich.edu * needed to process it. A specific subclass would be derived 2952662Sstever@eecs.umich.edu * from this to carry state specific to a particular sending 2962662Sstever@eecs.umich.edu * device. */ 2974610Ssaidi@eecs.umich.edu class SenderState : public FastAlloc { 2982641Sstever@eecs.umich.edu public: 2992641Sstever@eecs.umich.edu virtual ~SenderState() {} 3002641Sstever@eecs.umich.edu }; 3012641Sstever@eecs.umich.edu 3025314Sstever@gmail.com class PrintReqState : public SenderState { 3035314Sstever@gmail.com class LabelStackEntry { 3045314Sstever@gmail.com public: 3055314Sstever@gmail.com const std::string label; 3065314Sstever@gmail.com std::string *prefix; 3075314Sstever@gmail.com bool labelPrinted; 3085314Sstever@gmail.com LabelStackEntry(const std::string &_label, 3095314Sstever@gmail.com std::string *_prefix); 3105314Sstever@gmail.com }; 3115314Sstever@gmail.com 3125314Sstever@gmail.com typedef std::list<LabelStackEntry> LabelStack; 3135314Sstever@gmail.com LabelStack labelStack; 3145314Sstever@gmail.com 3155314Sstever@gmail.com std::string *curPrefixPtr; 3165314Sstever@gmail.com 3175314Sstever@gmail.com public: 3185314Sstever@gmail.com std::ostream &os; 3195314Sstever@gmail.com const int verbosity; 3205314Sstever@gmail.com 3215314Sstever@gmail.com PrintReqState(std::ostream &os, int verbosity = 0); 3225314Sstever@gmail.com ~PrintReqState(); 3235314Sstever@gmail.com 3245314Sstever@gmail.com const std::string &curPrefix() { return *curPrefixPtr; } 3255314Sstever@gmail.com void pushLabel(const std::string &lbl, 3265314Sstever@gmail.com const std::string &prefix = " "); 3275314Sstever@gmail.com void popLabel(); 3285314Sstever@gmail.com void printLabels(); 3295314Sstever@gmail.com void printObj(Printable *obj); 3305314Sstever@gmail.com }; 3315314Sstever@gmail.com 3322662Sstever@eecs.umich.edu /** This packet's sender state. Devices should use dynamic_cast<> 3332662Sstever@eecs.umich.edu * to cast to the state appropriate to the sender. */ 3342662Sstever@eecs.umich.edu SenderState *senderState; 3352641Sstever@eecs.umich.edu 3362662Sstever@eecs.umich.edu /** Return the string name of the cmd field (for debugging and 3372662Sstever@eecs.umich.edu * tracing). */ 3384022Sstever@eecs.umich.edu const std::string &cmdString() const { return cmd.toString(); } 3392811Srdreslin@umich.edu 3402811Srdreslin@umich.edu /** Return the index of this command. */ 3414022Sstever@eecs.umich.edu inline int cmdToIndex() const { return cmd.toInt(); } 3422811Srdreslin@umich.edu 3434022Sstever@eecs.umich.edu bool isRead() const { return cmd.isRead(); } 3444022Sstever@eecs.umich.edu bool isWrite() const { return cmd.isWrite(); } 3454022Sstever@eecs.umich.edu bool isRequest() const { return cmd.isRequest(); } 3464022Sstever@eecs.umich.edu bool isResponse() const { return cmd.isResponse(); } 3474870Sstever@eecs.umich.edu bool needsExclusive() const { return cmd.needsExclusive(); } 3484022Sstever@eecs.umich.edu bool needsResponse() const { return cmd.needsResponse(); } 3494022Sstever@eecs.umich.edu bool isInvalidate() const { return cmd.isInvalidate(); } 3504022Sstever@eecs.umich.edu bool hasData() const { return cmd.hasData(); } 3514040Ssaidi@eecs.umich.edu bool isReadWrite() const { return cmd.isReadWrite(); } 3524626Sstever@eecs.umich.edu bool isLocked() const { return cmd.isLocked(); } 3534870Sstever@eecs.umich.edu bool isError() const { return cmd.isError(); } 3545314Sstever@gmail.com bool isPrint() const { return cmd.isPrint(); } 3552812Srdreslin@umich.edu 3564870Sstever@eecs.umich.edu // Snoop flags 3574870Sstever@eecs.umich.edu void assertMemInhibit() { flags[MemInhibit] = true; } 3584916Sstever@eecs.umich.edu bool memInhibitAsserted() { return flags[MemInhibit]; } 3594870Sstever@eecs.umich.edu void assertShared() { flags[Shared] = true; } 3604870Sstever@eecs.umich.edu bool sharedAsserted() { return flags[Shared]; } 3614870Sstever@eecs.umich.edu 3624895Sstever@eecs.umich.edu // Special control flags 3634895Sstever@eecs.umich.edu void setExpressSnoop() { flags[ExpressSnoop] = true; } 3644895Sstever@eecs.umich.edu bool isExpressSnoop() { return flags[ExpressSnoop]; } 3654916Sstever@eecs.umich.edu void setSupplyExclusive() { flags[SupplyExclusive] = true; } 3664916Sstever@eecs.umich.edu bool isSupplyExclusive() { return flags[SupplyExclusive]; } 3674895Sstever@eecs.umich.edu 3684870Sstever@eecs.umich.edu // Network error conditions... encapsulate them as methods since 3694870Sstever@eecs.umich.edu // their encoding keeps changing (from result field to command 3704870Sstever@eecs.umich.edu // field, etc.) 3714986Ssaidi@eecs.umich.edu void setNacked() { assert(isResponse()); cmd = MemCmd::NetworkNackError; } 3724986Ssaidi@eecs.umich.edu void setBadAddress() { assert(isResponse()); cmd = MemCmd::BadAddressError; } 3734870Sstever@eecs.umich.edu bool wasNacked() { return cmd == MemCmd::NetworkNackError; } 3744870Sstever@eecs.umich.edu bool hadBadAddress() { return cmd == MemCmd::BadAddressError; } 3754986Ssaidi@eecs.umich.edu void copyError(Packet *pkt) { assert(pkt->isError()); cmd = pkt->cmd; } 3762814Srdreslin@umich.edu 3773940Ssaidi@eecs.umich.edu bool nic_pkt() { panic("Unimplemented"); M5_DUMMY_RETURN } 3782641Sstever@eecs.umich.edu 3792381SN/A /** Accessor function that returns the source index of the packet. */ 3804870Sstever@eecs.umich.edu short getSrc() const { assert(srcValid); return src; } 3812641Sstever@eecs.umich.edu void setSrc(short _src) { src = _src; srcValid = true; } 3824626Sstever@eecs.umich.edu /** Reset source field, e.g. to retransmit packet on different bus. */ 3834626Sstever@eecs.umich.edu void clearSrc() { srcValid = false; } 3842381SN/A 3852381SN/A /** Accessor function that returns the destination index of 3862381SN/A the packet. */ 3874870Sstever@eecs.umich.edu short getDest() const { assert(destValid); return dest; } 3884870Sstever@eecs.umich.edu void setDest(short _dest) { dest = _dest; destValid = true; } 3892549SN/A 3902663Sstever@eecs.umich.edu Addr getAddr() const { assert(addrSizeValid); return addr; } 3914870Sstever@eecs.umich.edu int getSize() const { assert(addrSizeValid); return size; } 3922883Srdreslin@umich.edu Addr getOffset(int blkSize) const { return addr & (Addr)(blkSize - 1); } 3932813Srdreslin@umich.edu 3942662Sstever@eecs.umich.edu /** Constructor. Note that a Request object must be constructed 3952662Sstever@eecs.umich.edu * first, but the Requests's physical address and size fields 3962662Sstever@eecs.umich.edu * need not be valid. The command and destination addresses 3972662Sstever@eecs.umich.edu * must be supplied. */ 3984022Sstever@eecs.umich.edu Packet(Request *_req, MemCmd _cmd, short _dest) 3994870Sstever@eecs.umich.edu : cmd(_cmd), req(_req), 4004870Sstever@eecs.umich.edu data(NULL), staticData(false), dynamicData(false), arrayData(false), 4012641Sstever@eecs.umich.edu addr(_req->paddr), size(_req->size), dest(_dest), 4024870Sstever@eecs.umich.edu addrSizeValid(_req->validPaddr), srcValid(false), destValid(true), 4034870Sstever@eecs.umich.edu flags(0), time(curTick), senderState(NULL) 4042641Sstever@eecs.umich.edu { 4052813Srdreslin@umich.edu } 4062813Srdreslin@umich.edu 4072813Srdreslin@umich.edu /** Alternate constructor if you are trying to create a packet with 4082813Srdreslin@umich.edu * a request that is for a whole block, not the address from the req. 4092813Srdreslin@umich.edu * this allows for overriding the size/addr of the req.*/ 4104022Sstever@eecs.umich.edu Packet(Request *_req, MemCmd _cmd, short _dest, int _blkSize) 4114870Sstever@eecs.umich.edu : cmd(_cmd), req(_req), 4124870Sstever@eecs.umich.edu data(NULL), staticData(false), dynamicData(false), arrayData(false), 4134626Sstever@eecs.umich.edu addr(_req->paddr & ~(_blkSize - 1)), size(_blkSize), dest(_dest), 4144870Sstever@eecs.umich.edu addrSizeValid(_req->validPaddr), srcValid(false), destValid(true), 4154870Sstever@eecs.umich.edu flags(0), time(curTick), senderState(NULL) 4162813Srdreslin@umich.edu { 4174626Sstever@eecs.umich.edu } 4184626Sstever@eecs.umich.edu 4194626Sstever@eecs.umich.edu /** Alternate constructor for copying a packet. Copy all fields 4204887Sstever@eecs.umich.edu * *except* if the original packet's data was dynamic, don't copy 4214887Sstever@eecs.umich.edu * that, as we can't guarantee that the new packet's lifetime is 4224887Sstever@eecs.umich.edu * less than that of the original packet. In this case the new 4234887Sstever@eecs.umich.edu * packet should allocate its own data. */ 4244895Sstever@eecs.umich.edu Packet(Packet *origPkt, bool clearFlags = false) 4254870Sstever@eecs.umich.edu : cmd(origPkt->cmd), req(origPkt->req), 4264887Sstever@eecs.umich.edu data(origPkt->staticData ? origPkt->data : NULL), 4274887Sstever@eecs.umich.edu staticData(origPkt->staticData), 4284887Sstever@eecs.umich.edu dynamicData(false), arrayData(false), 4294626Sstever@eecs.umich.edu addr(origPkt->addr), size(origPkt->size), 4304660Sstever@eecs.umich.edu src(origPkt->src), dest(origPkt->dest), 4314870Sstever@eecs.umich.edu addrSizeValid(origPkt->addrSizeValid), 4324870Sstever@eecs.umich.edu srcValid(origPkt->srcValid), destValid(origPkt->destValid), 4334895Sstever@eecs.umich.edu flags(clearFlags ? 0 : origPkt->flags), 4344870Sstever@eecs.umich.edu time(curTick), senderState(origPkt->senderState) 4354626Sstever@eecs.umich.edu { 4362641Sstever@eecs.umich.edu } 4372549SN/A 4382662Sstever@eecs.umich.edu /** Destructor. */ 4392566SN/A ~Packet() 4403665Srdreslin@umich.edu { if (staticData || dynamicData) deleteData(); } 4412566SN/A 4422662Sstever@eecs.umich.edu /** Reinitialize packet address and size from the associated 4432662Sstever@eecs.umich.edu * Request object, and reset other fields that may have been 4442662Sstever@eecs.umich.edu * modified by a previous transaction. Typically called when a 4452662Sstever@eecs.umich.edu * statically allocated Request/Packet pair is reused for 4462662Sstever@eecs.umich.edu * multiple transactions. */ 4472662Sstever@eecs.umich.edu void reinitFromRequest() { 4482662Sstever@eecs.umich.edu assert(req->validPaddr); 4494870Sstever@eecs.umich.edu flags = 0; 4502663Sstever@eecs.umich.edu addr = req->paddr; 4512663Sstever@eecs.umich.edu size = req->size; 4523018Srdreslin@umich.edu time = req->time; 4532663Sstever@eecs.umich.edu addrSizeValid = true; 4542662Sstever@eecs.umich.edu if (dynamicData) { 4552662Sstever@eecs.umich.edu deleteData(); 4562662Sstever@eecs.umich.edu dynamicData = false; 4572662Sstever@eecs.umich.edu arrayData = false; 4582662Sstever@eecs.umich.edu } 4592662Sstever@eecs.umich.edu } 4602566SN/A 4614626Sstever@eecs.umich.edu /** 4624626Sstever@eecs.umich.edu * Take a request packet and modify it in place to be suitable for 4634626Sstever@eecs.umich.edu * returning as a response to that request. The source and 4644626Sstever@eecs.umich.edu * destination fields are *not* modified, as is appropriate for 4654626Sstever@eecs.umich.edu * atomic accesses. 4664626Sstever@eecs.umich.edu */ 4674870Sstever@eecs.umich.edu void makeResponse() 4684626Sstever@eecs.umich.edu { 4692662Sstever@eecs.umich.edu assert(needsResponse()); 4702855Srdreslin@umich.edu assert(isRequest()); 4714986Ssaidi@eecs.umich.edu origCmd = cmd; 4724022Sstever@eecs.umich.edu cmd = cmd.responseCommand(); 4734870Sstever@eecs.umich.edu dest = src; 4744870Sstever@eecs.umich.edu destValid = srcValid; 4752662Sstever@eecs.umich.edu srcValid = false; 4762641Sstever@eecs.umich.edu } 4772641Sstever@eecs.umich.edu 4784870Sstever@eecs.umich.edu void makeAtomicResponse() 4794870Sstever@eecs.umich.edu { 4804870Sstever@eecs.umich.edu makeResponse(); 4814870Sstever@eecs.umich.edu } 4824870Sstever@eecs.umich.edu 4834626Sstever@eecs.umich.edu void makeTimingResponse() 4843348Sbinkertn@umich.edu { 4854870Sstever@eecs.umich.edu makeResponse(); 4863135Srdreslin@umich.edu } 4873135Srdreslin@umich.edu 4883348Sbinkertn@umich.edu /** 4893348Sbinkertn@umich.edu * Take a request packet that has been returned as NACKED and 4903348Sbinkertn@umich.edu * modify it so that it can be sent out again. Only packets that 4913348Sbinkertn@umich.edu * need a response can be NACKED, so verify that that is true. 4923348Sbinkertn@umich.edu */ 4933348Sbinkertn@umich.edu void 4943348Sbinkertn@umich.edu reinitNacked() 4953348Sbinkertn@umich.edu { 4964870Sstever@eecs.umich.edu assert(wasNacked()); 4974870Sstever@eecs.umich.edu cmd = origCmd; 4984870Sstever@eecs.umich.edu assert(needsResponse()); 4994870Sstever@eecs.umich.edu setDest(Broadcast); 5002685Ssaidi@eecs.umich.edu } 5012685Ssaidi@eecs.umich.edu 5022685Ssaidi@eecs.umich.edu 5033348Sbinkertn@umich.edu /** 5043348Sbinkertn@umich.edu * Set the data pointer to the following value that should not be 5053348Sbinkertn@umich.edu * freed. 5062566SN/A */ 5072566SN/A template <typename T> 5083348Sbinkertn@umich.edu void 5093348Sbinkertn@umich.edu dataStatic(T *p) 5103348Sbinkertn@umich.edu { 5113348Sbinkertn@umich.edu if(dynamicData) 5123348Sbinkertn@umich.edu dynamicData = false; 5133348Sbinkertn@umich.edu data = (PacketDataPtr)p; 5143348Sbinkertn@umich.edu staticData = true; 5153348Sbinkertn@umich.edu } 5162566SN/A 5173348Sbinkertn@umich.edu /** 5183348Sbinkertn@umich.edu * Set the data pointer to a value that should have delete [] 5193348Sbinkertn@umich.edu * called on it. 5203348Sbinkertn@umich.edu */ 5212566SN/A template <typename T> 5223348Sbinkertn@umich.edu void 5233348Sbinkertn@umich.edu dataDynamicArray(T *p) 5243348Sbinkertn@umich.edu { 5253348Sbinkertn@umich.edu assert(!staticData && !dynamicData); 5263348Sbinkertn@umich.edu data = (PacketDataPtr)p; 5273348Sbinkertn@umich.edu dynamicData = true; 5283348Sbinkertn@umich.edu arrayData = true; 5293348Sbinkertn@umich.edu } 5303348Sbinkertn@umich.edu 5313348Sbinkertn@umich.edu /** 5323348Sbinkertn@umich.edu * set the data pointer to a value that should have delete called 5333348Sbinkertn@umich.edu * on it. 5343348Sbinkertn@umich.edu */ 5353348Sbinkertn@umich.edu template <typename T> 5363348Sbinkertn@umich.edu void 5373348Sbinkertn@umich.edu dataDynamic(T *p) 5383348Sbinkertn@umich.edu { 5393348Sbinkertn@umich.edu assert(!staticData && !dynamicData); 5403348Sbinkertn@umich.edu data = (PacketDataPtr)p; 5413348Sbinkertn@umich.edu dynamicData = true; 5423348Sbinkertn@umich.edu arrayData = false; 5433348Sbinkertn@umich.edu } 5443348Sbinkertn@umich.edu 5453348Sbinkertn@umich.edu /** get a pointer to the data ptr. */ 5463348Sbinkertn@umich.edu template <typename T> 5473348Sbinkertn@umich.edu T* 5483348Sbinkertn@umich.edu getPtr() 5493348Sbinkertn@umich.edu { 5503348Sbinkertn@umich.edu assert(staticData || dynamicData); 5513348Sbinkertn@umich.edu return (T*)data; 5523348Sbinkertn@umich.edu } 5532566SN/A 5542566SN/A /** return the value of what is pointed to in the packet. */ 5552566SN/A template <typename T> 5562592SN/A T get(); 5572566SN/A 5582566SN/A /** set the value in the data pointer to v. */ 5592566SN/A template <typename T> 5602592SN/A void set(T v); 5612566SN/A 5623348Sbinkertn@umich.edu /** 5634626Sstever@eecs.umich.edu * Copy data into the packet from the provided pointer. 5644626Sstever@eecs.umich.edu */ 5654626Sstever@eecs.umich.edu void setData(uint8_t *p) 5664626Sstever@eecs.umich.edu { 5674626Sstever@eecs.umich.edu std::memcpy(getPtr<uint8_t>(), p, getSize()); 5684626Sstever@eecs.umich.edu } 5694626Sstever@eecs.umich.edu 5704626Sstever@eecs.umich.edu /** 5714626Sstever@eecs.umich.edu * Copy data into the packet from the provided block pointer, 5724626Sstever@eecs.umich.edu * which is aligned to the given block size. 5734626Sstever@eecs.umich.edu */ 5744626Sstever@eecs.umich.edu void setDataFromBlock(uint8_t *blk_data, int blkSize) 5754626Sstever@eecs.umich.edu { 5764626Sstever@eecs.umich.edu setData(blk_data + getOffset(blkSize)); 5774626Sstever@eecs.umich.edu } 5784626Sstever@eecs.umich.edu 5794626Sstever@eecs.umich.edu /** 5804626Sstever@eecs.umich.edu * Copy data from the packet to the provided block pointer, which 5814626Sstever@eecs.umich.edu * is aligned to the given block size. 5824626Sstever@eecs.umich.edu */ 5834626Sstever@eecs.umich.edu void writeData(uint8_t *p) 5844626Sstever@eecs.umich.edu { 5854626Sstever@eecs.umich.edu std::memcpy(p, getPtr<uint8_t>(), getSize()); 5864626Sstever@eecs.umich.edu } 5874626Sstever@eecs.umich.edu 5884626Sstever@eecs.umich.edu /** 5894626Sstever@eecs.umich.edu * Copy data from the packet to the memory at the provided pointer. 5904626Sstever@eecs.umich.edu */ 5914626Sstever@eecs.umich.edu void writeDataToBlock(uint8_t *blk_data, int blkSize) 5924626Sstever@eecs.umich.edu { 5934626Sstever@eecs.umich.edu writeData(blk_data + getOffset(blkSize)); 5944626Sstever@eecs.umich.edu } 5954626Sstever@eecs.umich.edu 5964626Sstever@eecs.umich.edu /** 5973348Sbinkertn@umich.edu * delete the data pointed to in the data pointer. Ok to call to 5983348Sbinkertn@umich.edu * matter how data was allocted. 5993348Sbinkertn@umich.edu */ 6002592SN/A void deleteData(); 6012566SN/A 6022566SN/A /** If there isn't data in the packet, allocate some. */ 6032592SN/A void allocate(); 6042568SN/A 6054626Sstever@eecs.umich.edu /** 6064626Sstever@eecs.umich.edu * Check a functional request against a memory value represented 6074626Sstever@eecs.umich.edu * by a base/size pair and an associated data array. If the 6084626Sstever@eecs.umich.edu * functional request is a read, it may be satisfied by the memory 6094626Sstever@eecs.umich.edu * value. If the functional request is a write, it may update the 6104626Sstever@eecs.umich.edu * memory value. 6114626Sstever@eecs.umich.edu */ 6125314Sstever@gmail.com bool checkFunctional(Printable *obj, Addr base, int size, uint8_t *data); 6134626Sstever@eecs.umich.edu 6144626Sstever@eecs.umich.edu /** 6154626Sstever@eecs.umich.edu * Check a functional request against a memory value stored in 6165314Sstever@gmail.com * another packet (i.e. an in-transit request or response). If 6175314Sstever@gmail.com * possible, the request will be satisfied and transformed 6185314Sstever@gmail.com * in-place into a response (at which point no further checking 6195314Sstever@gmail.com * need be done). 6205314Sstever@gmail.com * 6215314Sstever@gmail.com * @return True if the memory location addressed by the request 6225314Sstever@gmail.com * overlaps with the location addressed by otherPkt. 6234626Sstever@eecs.umich.edu */ 6244626Sstever@eecs.umich.edu bool checkFunctional(PacketPtr otherPkt) { 6255314Sstever@gmail.com return checkFunctional(otherPkt, 6265314Sstever@gmail.com otherPkt->getAddr(), otherPkt->getSize(), 6275314Sstever@gmail.com otherPkt->hasData() ? 6285314Sstever@gmail.com otherPkt->getPtr<uint8_t>() : NULL); 6294626Sstever@eecs.umich.edu } 6305314Sstever@gmail.com 6315314Sstever@gmail.com void pushLabel(const std::string &lbl) { 6325314Sstever@gmail.com if (isPrint()) { 6335314Sstever@gmail.com dynamic_cast<PrintReqState*>(senderState)->pushLabel(lbl); 6345314Sstever@gmail.com } 6355314Sstever@gmail.com } 6365314Sstever@gmail.com 6375314Sstever@gmail.com void popLabel() { 6385314Sstever@gmail.com if (isPrint()) { 6395314Sstever@gmail.com dynamic_cast<PrintReqState*>(senderState)->popLabel(); 6405314Sstever@gmail.com } 6415314Sstever@gmail.com } 6425314Sstever@gmail.com 6435314Sstever@gmail.com void print(std::ostream &o, int verbosity = 0, 6445314Sstever@gmail.com const std::string &prefix = "") const; 6452381SN/A}; 6462381SN/A 6472381SN/A#endif //__MEM_PACKET_HH 648