packet.hh revision 10694:1a6785e37d81
12SN/A/* 28703Sandreas.hansson@arm.com * Copyright (c) 2012-2015 ARM Limited 38703Sandreas.hansson@arm.com * All rights reserved 48703Sandreas.hansson@arm.com * 58703Sandreas.hansson@arm.com * The license below extends only to copyright in the software and shall 68703Sandreas.hansson@arm.com * not be construed as granting a license to any other intellectual 78703Sandreas.hansson@arm.com * property including but not limited to intellectual property relating 88703Sandreas.hansson@arm.com * to a hardware implementation of the functionality of the software 98703Sandreas.hansson@arm.com * licensed hereunder. You may use the software subject to the license 108703Sandreas.hansson@arm.com * terms below provided that you ensure that this notice is replicated 118703Sandreas.hansson@arm.com * unmodified and in its entirety in all distributions of the software, 128703Sandreas.hansson@arm.com * modified or unmodified, in source code or in binary form. 138703Sandreas.hansson@arm.com * 141762SN/A * Copyright (c) 2006 The Regents of The University of Michigan 157897Shestness@cs.utexas.edu * Copyright (c) 2010 Advanced Micro Devices, Inc. 162SN/A * All rights reserved. 172SN/A * 182SN/A * Redistribution and use in source and binary forms, with or without 192SN/A * modification, are permitted provided that the following conditions are 202SN/A * met: redistributions of source code must retain the above copyright 212SN/A * notice, this list of conditions and the following disclaimer; 222SN/A * redistributions in binary form must reproduce the above copyright 232SN/A * notice, this list of conditions and the following disclaimer in the 242SN/A * documentation and/or other materials provided with the distribution; 252SN/A * neither the name of the copyright holders nor the names of its 262SN/A * contributors may be used to endorse or promote products derived from 272SN/A * this software without specific prior written permission. 282SN/A * 292SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 302SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 312SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 322SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 332SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 342SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 352SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 362SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 372SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 382SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 392SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 402665Ssaidi@eecs.umich.edu * 412665Ssaidi@eecs.umich.edu * Authors: Ron Dreslinski 422665Ssaidi@eecs.umich.edu * Steve Reinhardt 432665Ssaidi@eecs.umich.edu * Ali Saidi 447897Shestness@cs.utexas.edu * Andreas Hansson 452SN/A */ 462SN/A 472SN/A/** 482SN/A * @file 492SN/A * Declaration of the Packet class. 502SN/A */ 519645SAndreas.Sandberg@ARM.com 5275SN/A#ifndef __MEM_PACKET_HH__ 532SN/A#define __MEM_PACKET_HH__ 542439SN/A 552439SN/A#include <bitset> 56603SN/A#include <cassert> 57603SN/A#include <list> 584762Snate@binkert.org 598769Sgblack@eecs.umich.edu#include "base/cast.hh" 608852Sandreas.hansson@arm.com#include "base/compiler.hh" 618703Sandreas.hansson@arm.com#include "base/flags.hh" 622520SN/A#include "base/misc.hh" 638931Sandreas.hansson@arm.com#include "base/printable.hh" 644762Snate@binkert.org#include "base/types.hh" 656658Snate@binkert.org#include "mem/request.hh" 661634SN/A#include "sim/core.hh" 678769Sgblack@eecs.umich.edu 688769Sgblack@eecs.umich.educlass Packet; 691634SN/Atypedef Packet *PacketPtr; 70803SN/Atypedef uint8_t* PacketDataPtr; 718769Sgblack@eecs.umich.edutypedef std::list<PacketPtr> PacketList; 722SN/A 738703Sandreas.hansson@arm.comclass MemCmd 742SN/A{ 758703Sandreas.hansson@arm.com friend class Packet; 768703Sandreas.hansson@arm.com 778703Sandreas.hansson@arm.com public: 788703Sandreas.hansson@arm.com /** 798703Sandreas.hansson@arm.com * List of all commands associated with a packet. 808703Sandreas.hansson@arm.com */ 818703Sandreas.hansson@arm.com enum Command 828922Swilliam.wang@arm.com { 838703Sandreas.hansson@arm.com InvalidCmd, 848703Sandreas.hansson@arm.com ReadReq, 858703Sandreas.hansson@arm.com ReadResp, 868703Sandreas.hansson@arm.com ReadRespWithInvalidate, 878703Sandreas.hansson@arm.com WriteReq, 888703Sandreas.hansson@arm.com WriteResp, 898703Sandreas.hansson@arm.com Writeback, 908922Swilliam.wang@arm.com SoftPFReq, 918703Sandreas.hansson@arm.com HardPFReq, 928975Sandreas.hansson@arm.com SoftPFResp, 938703Sandreas.hansson@arm.com HardPFResp, 948922Swilliam.wang@arm.com WriteInvalidateReq, 958922Swilliam.wang@arm.com WriteInvalidateResp, 968703Sandreas.hansson@arm.com UpgradeReq, 978703Sandreas.hansson@arm.com SCUpgradeReq, // Special "weak" upgrade for StoreCond 988703Sandreas.hansson@arm.com UpgradeResp, 998703Sandreas.hansson@arm.com SCUpgradeFailReq, // Failed SCUpgradeReq in MSHR (never sent) 100603SN/A UpgradeFailResp, // Valid for SCUpgradeReq only 1012901Ssaidi@eecs.umich.edu ReadExReq, 1028703Sandreas.hansson@arm.com ReadExResp, 1038706Sandreas.hansson@arm.com LoadLockedReq, 1048706Sandreas.hansson@arm.com StoreCondReq, 1058706Sandreas.hansson@arm.com StoreCondFailReq, // Failed StoreCondReq in MSHR (never sent) 1068706Sandreas.hansson@arm.com StoreCondResp, 1078706Sandreas.hansson@arm.com SwapReq, 1088706Sandreas.hansson@arm.com SwapResp, 1098852Sandreas.hansson@arm.com MessageReq, 1108703Sandreas.hansson@arm.com MessageResp, 1118703Sandreas.hansson@arm.com // Error responses 1128703Sandreas.hansson@arm.com // @TODO these should be classified as responses rather than 1138703Sandreas.hansson@arm.com // requests; coding them as requests initially for backwards 1148852Sandreas.hansson@arm.com // compatibility 1158703Sandreas.hansson@arm.com InvalidDestError, // packet dest field invalid 1168922Swilliam.wang@arm.com BadAddressError, // memory address invalid 1178703Sandreas.hansson@arm.com FunctionalReadError, // unable to fulfill functional read 1188703Sandreas.hansson@arm.com FunctionalWriteError, // unable to fulfill functional write 1198703Sandreas.hansson@arm.com // Fake simulator-only commands 1208703Sandreas.hansson@arm.com PrintReq, // Print state matching address 1219294Sandreas.hansson@arm.com FlushReq, //request for a cache flush 1229294Sandreas.hansson@arm.com InvalidationReq, // request for address to be invalidated from lsq 1238703Sandreas.hansson@arm.com NUM_MEM_CMDS 1249524SAndreas.Sandberg@ARM.com }; 1252902Ssaidi@eecs.umich.edu 1269524SAndreas.Sandberg@ARM.com private: 1279524SAndreas.Sandberg@ARM.com /** 1289524SAndreas.Sandberg@ARM.com * List of command attributes. 1299524SAndreas.Sandberg@ARM.com */ 1309524SAndreas.Sandberg@ARM.com enum Attribute 1319524SAndreas.Sandberg@ARM.com { 1329524SAndreas.Sandberg@ARM.com IsRead, //!< Data flows from responder to requester 1339524SAndreas.Sandberg@ARM.com IsWrite, //!< Data flows from requester to responder 1349524SAndreas.Sandberg@ARM.com IsUpgrade, 1359524SAndreas.Sandberg@ARM.com IsInvalidate, 1369524SAndreas.Sandberg@ARM.com NeedsExclusive, //!< Requires exclusive copy to complete in-cache 1379524SAndreas.Sandberg@ARM.com IsRequest, //!< Issued by requester 1389524SAndreas.Sandberg@ARM.com IsResponse, //!< Issue by responder 1394762Snate@binkert.org NeedsResponse, //!< Requester needs response from target 1402901Ssaidi@eecs.umich.edu IsSWPrefetch, 1419524SAndreas.Sandberg@ARM.com IsHWPrefetch, 1429524SAndreas.Sandberg@ARM.com IsLlsc, //!< Alpha/MIPS LL or SC access 1439524SAndreas.Sandberg@ARM.com HasData, //!< There is an associated payload 1449524SAndreas.Sandberg@ARM.com IsError, //!< Error response 1459524SAndreas.Sandberg@ARM.com IsPrint, //!< Print state matching address (for debugging) 1469524SAndreas.Sandberg@ARM.com IsFlush, //!< Flush the address from caches 1479524SAndreas.Sandberg@ARM.com NUM_COMMAND_ATTRIBUTES 1489524SAndreas.Sandberg@ARM.com }; 1499524SAndreas.Sandberg@ARM.com 1509524SAndreas.Sandberg@ARM.com /** 1519524SAndreas.Sandberg@ARM.com * Structure that defines attributes and other data associated 1529524SAndreas.Sandberg@ARM.com * with a Command. 1539524SAndreas.Sandberg@ARM.com */ 1549524SAndreas.Sandberg@ARM.com struct CommandInfo 1559524SAndreas.Sandberg@ARM.com { 1569524SAndreas.Sandberg@ARM.com /// Set of attribute flags. 1579524SAndreas.Sandberg@ARM.com const std::bitset<NUM_COMMAND_ATTRIBUTES> attributes; 1589524SAndreas.Sandberg@ARM.com /// Corresponding response for requests; InvalidCmd if no 1599524SAndreas.Sandberg@ARM.com /// response is applicable. 1609524SAndreas.Sandberg@ARM.com const Command response; 1619524SAndreas.Sandberg@ARM.com /// String representation (for printing) 1629524SAndreas.Sandberg@ARM.com const std::string str; 1639524SAndreas.Sandberg@ARM.com }; 1649524SAndreas.Sandberg@ARM.com 1659524SAndreas.Sandberg@ARM.com /// Array to map Command enum to associated info. 1669524SAndreas.Sandberg@ARM.com static const CommandInfo commandInfo[]; 1679524SAndreas.Sandberg@ARM.com 1689524SAndreas.Sandberg@ARM.com private: 1699524SAndreas.Sandberg@ARM.com 1709524SAndreas.Sandberg@ARM.com Command cmd; 1719524SAndreas.Sandberg@ARM.com 1729524SAndreas.Sandberg@ARM.com bool 1739524SAndreas.Sandberg@ARM.com testCmdAttrib(MemCmd::Attribute attrib) const 1749524SAndreas.Sandberg@ARM.com { 1759524SAndreas.Sandberg@ARM.com return commandInfo[cmd].attributes[attrib] != 0; 1769524SAndreas.Sandberg@ARM.com } 1779524SAndreas.Sandberg@ARM.com 1782901Ssaidi@eecs.umich.edu public: 1794762Snate@binkert.org 1809524SAndreas.Sandberg@ARM.com bool isRead() const { return testCmdAttrib(IsRead); } 1812901Ssaidi@eecs.umich.edu bool isWrite() const { return testCmdAttrib(IsWrite); } 1829814Sandreas.hansson@arm.com bool isUpgrade() const { return testCmdAttrib(IsUpgrade); } 1839814Sandreas.hansson@arm.com bool isRequest() const { return testCmdAttrib(IsRequest); } 1849814Sandreas.hansson@arm.com bool isResponse() const { return testCmdAttrib(IsResponse); } 1859814Sandreas.hansson@arm.com bool needsExclusive() const { return testCmdAttrib(NeedsExclusive); } 1869814Sandreas.hansson@arm.com bool needsResponse() const { return testCmdAttrib(NeedsResponse); } 1872SN/A bool isInvalidate() const { return testCmdAttrib(IsInvalidate); } 1882SN/A bool isWriteInvalidate() const { return testCmdAttrib(IsWrite) && 1892680Sktlim@umich.edu testCmdAttrib(IsInvalidate); } 1905714Shsul@eecs.umich.edu 1911806SN/A /** 1926221Snate@binkert.org * Check if this particular packet type carries payload data. Note 1935713Shsul@eecs.umich.edu * that this does not reflect if the data pointer of the packet is 1945713Shsul@eecs.umich.edu * valid or not. 1955713Shsul@eecs.umich.edu */ 1965713Shsul@eecs.umich.edu bool hasData() const { return testCmdAttrib(HasData); } 1975714Shsul@eecs.umich.edu bool isLLSC() const { return testCmdAttrib(IsLlsc); } 1981806SN/A bool isSWPrefetch() const { return testCmdAttrib(IsSWPrefetch); } 1996227Snate@binkert.org bool isHWPrefetch() const { return testCmdAttrib(IsHWPrefetch); } 2005714Shsul@eecs.umich.edu bool isPrefetch() const { return testCmdAttrib(IsSWPrefetch) || 2011806SN/A testCmdAttrib(IsHWPrefetch); } 202180SN/A bool isError() const { return testCmdAttrib(IsError); } 2036029Ssteve.reinhardt@amd.com bool isPrint() const { return testCmdAttrib(IsPrint); } 2046029Ssteve.reinhardt@amd.com bool isFlush() const { return testCmdAttrib(IsFlush); } 2056029Ssteve.reinhardt@amd.com 2066029Ssteve.reinhardt@amd.com const Command 2078765Sgblack@eecs.umich.edu responseCommand() const 2088765Sgblack@eecs.umich.edu { 2092378SN/A return commandInfo[cmd].response; 2102378SN/A } 2112520SN/A 2122520SN/A /// Return the string to a cmd given by idx. 2138852Sandreas.hansson@arm.com const std::string &toString() const { return commandInfo[cmd].str; } 2148852Sandreas.hansson@arm.com int toInt() const { return (int)cmd; } 2152520SN/A 2161885SN/A MemCmd(Command _cmd) : cmd(_cmd) { } 2171070SN/A MemCmd(int _cmd) : cmd((Command)_cmd) { } 218954SN/A MemCmd() : cmd(InvalidCmd) { } 2191070SN/A 2201070SN/A bool operator==(MemCmd c2) const { return (cmd == c2.cmd); } 2211070SN/A bool operator!=(MemCmd c2) const { return (cmd != c2.cmd); } 2221070SN/A}; 2231070SN/A 2241070SN/A/** 2251070SN/A * A Packet is used to encapsulate a transfer between two objects in 2261070SN/A * the memory system (e.g., the L1 and L2 cache). (In contrast, a 2271070SN/A * single Request travels all the way from the requester to the 2281070SN/A * ultimate destination and back, possibly being conveyed by several 2291070SN/A * different Packets along the way.) 2301070SN/A */ 2317580SAli.Saidi@arm.comclass Packet : public Printable 2327580SAli.Saidi@arm.com{ 2337580SAli.Saidi@arm.com public: 2347580SAli.Saidi@arm.com typedef uint32_t FlagsType; 2357580SAli.Saidi@arm.com typedef ::Flags<FlagsType> Flags; 2367580SAli.Saidi@arm.com 2377580SAli.Saidi@arm.com private: 2387580SAli.Saidi@arm.com static const FlagsType PUBLIC_FLAGS = 0x00000000; 2394997Sgblack@eecs.umich.edu static const FlagsType PRIVATE_FLAGS = 0x00007F0F; 2407770SAli.Saidi@ARM.com static const FlagsType COPY_FLAGS = 0x0000000F; 2414997Sgblack@eecs.umich.edu 2424997Sgblack@eecs.umich.edu static const FlagsType SHARED = 0x00000001; 2434997Sgblack@eecs.umich.edu // Special control flags 2444997Sgblack@eecs.umich.edu /// Special timing-mode atomic snoop for multi-level coherence. 2457770SAli.Saidi@ARM.com static const FlagsType EXPRESS_SNOOP = 0x00000002; 2464997Sgblack@eecs.umich.edu /// Does supplier have exclusive copy? 2474997Sgblack@eecs.umich.edu /// Useful for multi-level coherence. 2488931Sandreas.hansson@arm.com static const FlagsType SUPPLY_EXCLUSIVE = 0x00000004; 2498931Sandreas.hansson@arm.com // Snoop response flags 2508931Sandreas.hansson@arm.com static const FlagsType MEM_INHIBIT = 0x00000008; 2515795Ssaidi@eecs.umich.edu /// Are the 'addr' and 'size' fields valid? 2528931Sandreas.hansson@arm.com static const FlagsType VALID_ADDR = 0x00000100; 2535795Ssaidi@eecs.umich.edu static const FlagsType VALID_SIZE = 0x00000200; 2545795Ssaidi@eecs.umich.edu /// Is the data pointer set to a value that shouldn't be freed 2558931Sandreas.hansson@arm.com /// when the packet is destroyed? 2568931Sandreas.hansson@arm.com static const FlagsType STATIC_DATA = 0x00001000; 2578931Sandreas.hansson@arm.com /// The data pointer points to a value that should be freed when 2588931Sandreas.hansson@arm.com /// the packet is destroyed. The pointer is assumed to be pointing 2598931Sandreas.hansson@arm.com /// to an array, and delete [] is consequently called 2608931Sandreas.hansson@arm.com static const FlagsType DYNAMIC_DATA = 0x00002000; 2618931Sandreas.hansson@arm.com /// suppress the error if this packet encounters a functional 2628931Sandreas.hansson@arm.com /// access failure. 2638931Sandreas.hansson@arm.com static const FlagsType SUPPRESS_FUNC_ERROR = 0x00008000; 2648931Sandreas.hansson@arm.com // Signal prefetch squash through express snoop flag 2655795Ssaidi@eecs.umich.edu static const FlagsType PREFETCH_SNOOP_SQUASH = 0x00010000; 2661885SN/A 2678931Sandreas.hansson@arm.com Flags flags; 2688931Sandreas.hansson@arm.com 2698931Sandreas.hansson@arm.com public: 2704762Snate@binkert.org typedef MemCmd::Command Command; 2719814Sandreas.hansson@arm.com 2729814Sandreas.hansson@arm.com /// The command field of the packet. 2739814Sandreas.hansson@arm.com MemCmd cmd; 2747914SBrad.Beckmann@amd.com 2757914SBrad.Beckmann@amd.com /// A pointer to the original request. 2768666SPrakash.Ramrakhyani@arm.com const RequestPtr req; 2777914SBrad.Beckmann@amd.com 2787914SBrad.Beckmann@amd.com private: 2798832SAli.Saidi@ARM.com /** 2808832SAli.Saidi@ARM.com * A pointer to the data being transfered. It can be differnt 2818832SAli.Saidi@ARM.com * sizes at each level of the heirarchy so it belongs in the 2828832SAli.Saidi@ARM.com * packet, not request. This may or may not be populated when a 2838832SAli.Saidi@ARM.com * responder recieves the packet. If not populated it memory should 2848832SAli.Saidi@ARM.com * be allocated. 2858832SAli.Saidi@ARM.com */ 2867914SBrad.Beckmann@amd.com PacketDataPtr data; 2878832SAli.Saidi@ARM.com 2888832SAli.Saidi@ARM.com /// The address of the request. This address could be virtual or 2898832SAli.Saidi@ARM.com /// physical, depending on the system configuration. 2908832SAli.Saidi@ARM.com Addr addr; 2918832SAli.Saidi@ARM.com 2928832SAli.Saidi@ARM.com /// True if the request targets the secure memory space. 2938832SAli.Saidi@ARM.com bool _isSecure; 2948832SAli.Saidi@ARM.com 2958832SAli.Saidi@ARM.com /// The size of the request or transfer. 2968832SAli.Saidi@ARM.com unsigned size; 2978832SAli.Saidi@ARM.com 2988832SAli.Saidi@ARM.com /** 2998832SAli.Saidi@ARM.com * The original value of the command field. Only valid when the 3008832SAli.Saidi@ARM.com * current command field is an error condition; in that case, the 3018832SAli.Saidi@ARM.com * previous contents of the command field are copied here. This 3028832SAli.Saidi@ARM.com * field is *not* set on non-error responses. 3038832SAli.Saidi@ARM.com */ 3048832SAli.Saidi@ARM.com MemCmd origCmd; 3058832SAli.Saidi@ARM.com 3068832SAli.Saidi@ARM.com /** 3078832SAli.Saidi@ARM.com * These values specify the range of bytes found that satisfy a 3088666SPrakash.Ramrakhyani@arm.com * functional read. 3097914SBrad.Beckmann@amd.com */ 3107914SBrad.Beckmann@amd.com uint16_t bytesValidStart; 3117914SBrad.Beckmann@amd.com uint16_t bytesValidEnd; 3127914SBrad.Beckmann@amd.com 3138666SPrakash.Ramrakhyani@arm.com public: 3147914SBrad.Beckmann@amd.com 3157914SBrad.Beckmann@amd.com /** 3167914SBrad.Beckmann@amd.com * The extra delay from seeing the packet until the header is 3177914SBrad.Beckmann@amd.com * transmitted. This delay is used to communicate the crossbar 3187914SBrad.Beckmann@amd.com * forwarding latency to the neighbouring object (e.g. a cache) 3197914SBrad.Beckmann@amd.com * that actually makes the packet wait. As the delay is relative, 3207914SBrad.Beckmann@amd.com * a 32-bit unsigned should be sufficient. 3217914SBrad.Beckmann@amd.com */ 3227914SBrad.Beckmann@amd.com uint32_t headerDelay; 3237914SBrad.Beckmann@amd.com 3247914SBrad.Beckmann@amd.com /** 3257914SBrad.Beckmann@amd.com * The extra pipelining delay from seeing the packet until the end of 3267914SBrad.Beckmann@amd.com * payload is transmitted by the component that provided it (if 3277914SBrad.Beckmann@amd.com * any). This includes the header delay. Similar to the header 3287914SBrad.Beckmann@amd.com * delay, this is used to make up for the fact that the 3297914SBrad.Beckmann@amd.com * crossbar does not make the packet wait. As the delay is 3307914SBrad.Beckmann@amd.com * relative, a 32-bit unsigned should be sufficient. 3317914SBrad.Beckmann@amd.com */ 3327914SBrad.Beckmann@amd.com uint32_t payloadDelay; 3337914SBrad.Beckmann@amd.com 3347914SBrad.Beckmann@amd.com /** 3357914SBrad.Beckmann@amd.com * A virtual base opaque structure used to hold state associated 3367914SBrad.Beckmann@amd.com * with the packet (e.g., an MSHR), specific to a MemObject that 3377914SBrad.Beckmann@amd.com * sees the packet. A pointer to this state is returned in the 3387914SBrad.Beckmann@amd.com * packet's response so that the MemObject in question can quickly 3397914SBrad.Beckmann@amd.com * look up the state needed to process it. A specific subclass 3407914SBrad.Beckmann@amd.com * would be derived from this to carry state specific to a 3417914SBrad.Beckmann@amd.com * particular sending device. 3427914SBrad.Beckmann@amd.com * 3437914SBrad.Beckmann@amd.com * As multiple MemObjects may add their SenderState throughout the 3447914SBrad.Beckmann@amd.com * memory system, the SenderStates create a stack, where a 3457914SBrad.Beckmann@amd.com * MemObject can add a new Senderstate, as long as the 3462901Ssaidi@eecs.umich.edu * predecessing SenderState is restored when the response comes 3478666SPrakash.Ramrakhyani@arm.com * back. For this reason, the predecessor should always be 3488666SPrakash.Ramrakhyani@arm.com * populated with the current SenderState of a packet before 3498666SPrakash.Ramrakhyani@arm.com * modifying the senderState field in the request packet. 3508666SPrakash.Ramrakhyani@arm.com */ 3518666SPrakash.Ramrakhyani@arm.com struct SenderState 3528666SPrakash.Ramrakhyani@arm.com { 3538666SPrakash.Ramrakhyani@arm.com SenderState* predecessor; 3548666SPrakash.Ramrakhyani@arm.com SenderState() : predecessor(NULL) {} 3551885SN/A virtual ~SenderState() {} 3561885SN/A }; 3571885SN/A 3581885SN/A /** 3591885SN/A * Object used to maintain state of a PrintReq. The senderState 3608769Sgblack@eecs.umich.edu * field of a PrintReq should always be of this type. 3618769Sgblack@eecs.umich.edu */ 3628769Sgblack@eecs.umich.edu class PrintReqState : public SenderState 3638769Sgblack@eecs.umich.edu { 3641885SN/A private: 3659645SAndreas.Sandberg@ARM.com /** 3661885SN/A * An entry in the label stack. 3671885SN/A */ 3681885SN/A struct LabelStackEntry 3699645SAndreas.Sandberg@ARM.com { 3709645SAndreas.Sandberg@ARM.com const std::string label; 3719645SAndreas.Sandberg@ARM.com std::string *prefix; 3729645SAndreas.Sandberg@ARM.com bool labelPrinted; 3739645SAndreas.Sandberg@ARM.com LabelStackEntry(const std::string &_label, std::string *_prefix); 3749645SAndreas.Sandberg@ARM.com }; 3759645SAndreas.Sandberg@ARM.com 3769645SAndreas.Sandberg@ARM.com typedef std::list<LabelStackEntry> LabelStack; 3771885SN/A LabelStack labelStack; 3789645SAndreas.Sandberg@ARM.com 3799645SAndreas.Sandberg@ARM.com std::string *curPrefixPtr; 3809645SAndreas.Sandberg@ARM.com 3811885SN/A public: 3821913SN/A std::ostream &os; 3831885SN/A const int verbosity; 3841885SN/A 3859645SAndreas.Sandberg@ARM.com PrintReqState(std::ostream &os, int verbosity = 0); 3869645SAndreas.Sandberg@ARM.com ~PrintReqState(); 3871885SN/A 3881885SN/A /** 3891885SN/A * Returns the current line prefix. 3901885SN/A */ 3911885SN/A const std::string &curPrefix() { return *curPrefixPtr; } 3921885SN/A 3931885SN/A /** 3949645SAndreas.Sandberg@ARM.com * Push a label onto the label stack, and prepend the given 3951885SN/A * prefix string onto the current prefix. Labels will only be 3969645SAndreas.Sandberg@ARM.com * printed if an object within the label's scope is printed. 3971885SN/A */ 3981885SN/A void pushLabel(const std::string &lbl, 3999645SAndreas.Sandberg@ARM.com const std::string &prefix = " "); 4009645SAndreas.Sandberg@ARM.com 4019645SAndreas.Sandberg@ARM.com /** 4029645SAndreas.Sandberg@ARM.com * Pop a label off the label stack. 4039645SAndreas.Sandberg@ARM.com */ 4049645SAndreas.Sandberg@ARM.com void popLabel(); 4059645SAndreas.Sandberg@ARM.com 4069645SAndreas.Sandberg@ARM.com /** 4079645SAndreas.Sandberg@ARM.com * Print all of the pending unprinted labels on the 4089645SAndreas.Sandberg@ARM.com * stack. Called by printObj(), so normally not called by 4099645SAndreas.Sandberg@ARM.com * users unless bypassing printObj(). 4109645SAndreas.Sandberg@ARM.com */ 4119645SAndreas.Sandberg@ARM.com void printLabels(); 4129645SAndreas.Sandberg@ARM.com 4139645SAndreas.Sandberg@ARM.com /** 4149645SAndreas.Sandberg@ARM.com * Print a Printable object to os, because it matched the 4159645SAndreas.Sandberg@ARM.com * address on a PrintReq. 4169645SAndreas.Sandberg@ARM.com */ 4179645SAndreas.Sandberg@ARM.com void printObj(Printable *obj); 4189645SAndreas.Sandberg@ARM.com }; 4199645SAndreas.Sandberg@ARM.com 4209645SAndreas.Sandberg@ARM.com /** 4219645SAndreas.Sandberg@ARM.com * This packet's sender state. Devices should use dynamic_cast<> 4229645SAndreas.Sandberg@ARM.com * to cast to the state appropriate to the sender. The intent of 4239645SAndreas.Sandberg@ARM.com * this variable is to allow a device to attach extra information 4249645SAndreas.Sandberg@ARM.com * to a request. A response packet must return the sender state 4259645SAndreas.Sandberg@ARM.com * that was attached to the original request (even if a new packet 4269645SAndreas.Sandberg@ARM.com * is created). 4279645SAndreas.Sandberg@ARM.com */ 4289645SAndreas.Sandberg@ARM.com SenderState *senderState; 4299645SAndreas.Sandberg@ARM.com 4309645SAndreas.Sandberg@ARM.com /** 4319645SAndreas.Sandberg@ARM.com * Push a new sender state to the packet and make the current 4329645SAndreas.Sandberg@ARM.com * sender state the predecessor of the new one. This should be 4339645SAndreas.Sandberg@ARM.com * prefered over direct manipulation of the senderState member 4349645SAndreas.Sandberg@ARM.com * variable. 4359645SAndreas.Sandberg@ARM.com * 4369645SAndreas.Sandberg@ARM.com * @param sender_state SenderState to push at the top of the stack 4379645SAndreas.Sandberg@ARM.com */ 4389645SAndreas.Sandberg@ARM.com void pushSenderState(SenderState *sender_state); 4399645SAndreas.Sandberg@ARM.com 4409645SAndreas.Sandberg@ARM.com /** 4419645SAndreas.Sandberg@ARM.com * Pop the top of the state stack and return a pointer to it. This 4429645SAndreas.Sandberg@ARM.com * assumes the current sender state is not NULL. This should be 44377SN/A * preferred over direct manipulation of the senderState member 4446658Snate@binkert.org * variable. 4451070SN/A * 4463960Sgblack@eecs.umich.edu * @return The current top of the stack 4471070SN/A */ 4481070SN/A SenderState *popSenderState(); 4494762Snate@binkert.org 4501070SN/A /** 4512158SN/A * Go through the sender state stack and return the first instance 4522158SN/A * that is of type T (as determined by a dynamic_cast). If there 4531070SN/A * is no sender state of type T, NULL is returned. 4542158SN/A * 4551070SN/A * @return The topmost state of type T 4562SN/A */ 4572SN/A template <typename T> 4587733SAli.Saidi@ARM.com T * findNextSenderState() const 4591129SN/A { 4602158SN/A T *t = NULL; 4612158SN/A SenderState* sender_state = senderState; 4621070SN/A while (t == NULL && sender_state != NULL) { 4632378SN/A t = dynamic_cast<T*>(sender_state); 4641070SN/A sender_state = sender_state->predecessor; 4651070SN/A } 4661070SN/A return t; 4671070SN/A } 4681070SN/A 4691070SN/A /// Return the string name of the cmd field (for debugging and 4701070SN/A /// tracing). 4711070SN/A const std::string &cmdString() const { return cmd.toString(); } 4721070SN/A 4731070SN/A /// Return the index of this command. 4741070SN/A inline int cmdToIndex() const { return cmd.toInt(); } 4751070SN/A 4761070SN/A bool isRead() const { return cmd.isRead(); } 4771070SN/A bool isWrite() const { return cmd.isWrite(); } 4781070SN/A bool isUpgrade() const { return cmd.isUpgrade(); } 4791070SN/A bool isRequest() const { return cmd.isRequest(); } 4801070SN/A bool isResponse() const { return cmd.isResponse(); } 4811070SN/A bool needsExclusive() const { return cmd.needsExclusive(); } 4828601Ssteve.reinhardt@amd.com bool needsResponse() const { return cmd.needsResponse(); } 4838601Ssteve.reinhardt@amd.com bool isInvalidate() const { return cmd.isInvalidate(); } 4848601Ssteve.reinhardt@amd.com bool isWriteInvalidate() const { return cmd.isWriteInvalidate(); } 4852378SN/A bool hasData() const { return cmd.hasData(); } 4865718Shsul@eecs.umich.edu bool isLLSC() const { return cmd.isLLSC(); } 4875713Shsul@eecs.umich.edu bool isError() const { return cmd.isError(); } 4881070SN/A bool isPrint() const { return cmd.isPrint(); } 4891070SN/A bool isFlush() const { return cmd.isFlush(); } 4901070SN/A 4919342SAndreas.Sandberg@arm.com // Snoop flags 4929342SAndreas.Sandberg@arm.com void assertMemInhibit() 4939342SAndreas.Sandberg@arm.com { 4942SN/A assert(isRequest()); 49577SN/A assert(!flags.isSet(MEM_INHIBIT)); 4967897Shestness@cs.utexas.edu flags.set(MEM_INHIBIT); 4977897Shestness@cs.utexas.edu } 4988666SPrakash.Ramrakhyani@arm.com bool memInhibitAsserted() const { return flags.isSet(MEM_INHIBIT); } 4998666SPrakash.Ramrakhyani@arm.com void assertShared() { flags.set(SHARED); } 5007897Shestness@cs.utexas.edu bool sharedAsserted() const { return flags.isSet(SHARED); } 5012SN/A 5022SN/A // Special control flags 5032SN/A void setExpressSnoop() { flags.set(EXPRESS_SNOOP); } 5042SN/A bool isExpressSnoop() const { return flags.isSet(EXPRESS_SNOOP); } 5052SN/A void setSupplyExclusive() { flags.set(SUPPLY_EXCLUSIVE); } 5062SN/A void clearSupplyExclusive() { flags.clear(SUPPLY_EXCLUSIVE); } 5072SN/A bool isSupplyExclusive() const { return flags.isSet(SUPPLY_EXCLUSIVE); } 5082SN/A void setSuppressFuncError() { flags.set(SUPPRESS_FUNC_ERROR); } 5092SN/A bool suppressFuncError() const { return flags.isSet(SUPPRESS_FUNC_ERROR); } 5102SN/A void setPrefetchSquashed() { flags.set(PREFETCH_SNOOP_SQUASH); } 5112158SN/A bool prefetchSquashed() const { return flags.isSet(PREFETCH_SNOOP_SQUASH); } 5129112Smarc.orr@gmail.com 5139112Smarc.orr@gmail.com // Network error conditions... encapsulate them as methods since 5149112Smarc.orr@gmail.com // their encoding keeps changing (from result field to command 5159292Sandreas.hansson@arm.com // field, etc.) 5169292Sandreas.hansson@arm.com void 5179292Sandreas.hansson@arm.com setBadAddress() 5189292Sandreas.hansson@arm.com { 5199292Sandreas.hansson@arm.com assert(isResponse()); 5209292Sandreas.hansson@arm.com cmd = MemCmd::BadAddressError; 5219292Sandreas.hansson@arm.com } 5229292Sandreas.hansson@arm.com 5239292Sandreas.hansson@arm.com bool hadBadAddress() const { return cmd == MemCmd::BadAddressError; } 5249292Sandreas.hansson@arm.com void copyError(Packet *pkt) { assert(pkt->isError()); cmd = pkt->cmd; } 5259292Sandreas.hansson@arm.com 5269292Sandreas.hansson@arm.com Addr getAddr() const { assert(flags.isSet(VALID_ADDR)); return addr; } 5279292Sandreas.hansson@arm.com /** 5289292Sandreas.hansson@arm.com * Update the address of this packet mid-transaction. This is used 5299292Sandreas.hansson@arm.com * by the address mapper to change an already set address to a new 5309292Sandreas.hansson@arm.com * one based on the system configuration. It is intended to remap 5319292Sandreas.hansson@arm.com * an existing address, so it asserts that the current address is 5329292Sandreas.hansson@arm.com * valid. 5339292Sandreas.hansson@arm.com */ 5349292Sandreas.hansson@arm.com void setAddr(Addr _addr) { assert(flags.isSet(VALID_ADDR)); addr = _addr; } 5352158SN/A 5362SN/A unsigned getSize() const { assert(flags.isSet(VALID_SIZE)); return size; } 5372SN/A Addr getOffset(int blkSize) const { return getAddr() & (Addr)(blkSize - 1); } 5389554Sandreas.hansson@arm.com 5399554Sandreas.hansson@arm.com bool isSecure() const 5402SN/A { 541 assert(flags.isSet(VALID_ADDR)); 542 return _isSecure; 543 } 544 545 /** 546 * It has been determined that the SC packet should successfully update 547 * memory. Therefore, convert this SC packet to a normal write. 548 */ 549 void 550 convertScToWrite() 551 { 552 assert(isLLSC()); 553 assert(isWrite()); 554 cmd = MemCmd::WriteReq; 555 } 556 557 /** 558 * When ruby is in use, Ruby will monitor the cache line and thus M5 559 * phys memory should treat LL ops as normal reads. 560 */ 561 void 562 convertLlToRead() 563 { 564 assert(isLLSC()); 565 assert(isRead()); 566 cmd = MemCmd::ReadReq; 567 } 568 569 /** 570 * Constructor. Note that a Request object must be constructed 571 * first, but the Requests's physical address and size fields need 572 * not be valid. The command must be supplied. 573 */ 574 Packet(const RequestPtr _req, MemCmd _cmd) 575 : cmd(_cmd), req(_req), data(nullptr), addr(0), _isSecure(false), 576 size(0), bytesValidStart(0), bytesValidEnd(0), 577 headerDelay(0), payloadDelay(0), 578 senderState(NULL) 579 { 580 if (req->hasPaddr()) { 581 addr = req->getPaddr(); 582 flags.set(VALID_ADDR); 583 _isSecure = req->isSecure(); 584 } 585 if (req->hasSize()) { 586 size = req->getSize(); 587 flags.set(VALID_SIZE); 588 } 589 } 590 591 /** 592 * Alternate constructor if you are trying to create a packet with 593 * a request that is for a whole block, not the address from the 594 * req. this allows for overriding the size/addr of the req. 595 */ 596 Packet(const RequestPtr _req, MemCmd _cmd, int _blkSize) 597 : cmd(_cmd), req(_req), data(nullptr), addr(0), _isSecure(false), 598 bytesValidStart(0), bytesValidEnd(0), 599 headerDelay(0), payloadDelay(0), 600 senderState(NULL) 601 { 602 if (req->hasPaddr()) { 603 addr = req->getPaddr() & ~(_blkSize - 1); 604 flags.set(VALID_ADDR); 605 _isSecure = req->isSecure(); 606 } 607 size = _blkSize; 608 flags.set(VALID_SIZE); 609 } 610 611 /** 612 * Alternate constructor for copying a packet. Copy all fields 613 * *except* if the original packet's data was dynamic, don't copy 614 * that, as we can't guarantee that the new packet's lifetime is 615 * less than that of the original packet. In this case the new 616 * packet should allocate its own data. 617 */ 618 Packet(PacketPtr pkt, bool clear_flags, bool alloc_data) 619 : cmd(pkt->cmd), req(pkt->req), 620 data(nullptr), 621 addr(pkt->addr), _isSecure(pkt->_isSecure), size(pkt->size), 622 bytesValidStart(pkt->bytesValidStart), 623 bytesValidEnd(pkt->bytesValidEnd), 624 headerDelay(pkt->headerDelay), 625 payloadDelay(pkt->payloadDelay), 626 senderState(pkt->senderState) 627 { 628 if (!clear_flags) 629 flags.set(pkt->flags & COPY_FLAGS); 630 631 flags.set(pkt->flags & (VALID_ADDR|VALID_SIZE)); 632 633 // should we allocate space for data, or not, the express 634 // snoops do not need to carry any data as they only serve to 635 // co-ordinate state changes 636 if (alloc_data) { 637 // even if asked to allocate data, if the original packet 638 // holds static data, then the sender will not be doing 639 // any memcpy on receiving the response, thus we simply 640 // carry the pointer forward 641 if (pkt->flags.isSet(STATIC_DATA)) { 642 data = pkt->data; 643 flags.set(STATIC_DATA); 644 } else { 645 allocate(); 646 } 647 } 648 } 649 650 /** 651 * Change the packet type based on request type. 652 */ 653 void 654 refineCommand() 655 { 656 if (cmd == MemCmd::ReadReq) { 657 if (req->isLLSC()) { 658 cmd = MemCmd::LoadLockedReq; 659 } else if (req->isPrefetch()) { 660 cmd = MemCmd::SoftPFReq; 661 } 662 } else if (cmd == MemCmd::WriteReq) { 663 if (req->isLLSC()) { 664 cmd = MemCmd::StoreCondReq; 665 } else if (req->isSwap()) { 666 cmd = MemCmd::SwapReq; 667 } 668 } 669 } 670 671 /** 672 * Constructor-like methods that return Packets based on Request objects. 673 * Will call refineCommand() to fine-tune the Packet type if it's not a 674 * vanilla read or write. 675 */ 676 static PacketPtr 677 createRead(const RequestPtr req) 678 { 679 PacketPtr pkt = new Packet(req, MemCmd::ReadReq); 680 pkt->refineCommand(); 681 return pkt; 682 } 683 684 static PacketPtr 685 createWrite(const RequestPtr req) 686 { 687 PacketPtr pkt = new Packet(req, MemCmd::WriteReq); 688 pkt->refineCommand(); 689 return pkt; 690 } 691 692 /** 693 * clean up packet variables 694 */ 695 ~Packet() 696 { 697 // If this is a request packet for which there's no response, 698 // delete the request object here, since the requester will 699 // never get the chance. 700 if (req && isRequest() && !needsResponse()) 701 delete req; 702 deleteData(); 703 } 704 705 /** 706 * Take a request packet and modify it in place to be suitable for 707 * returning as a response to that request. 708 */ 709 void 710 makeResponse() 711 { 712 assert(needsResponse()); 713 assert(isRequest()); 714 origCmd = cmd; 715 cmd = cmd.responseCommand(); 716 717 // responses are never express, even if the snoop that 718 // triggered them was 719 flags.clear(EXPRESS_SNOOP); 720 } 721 722 void 723 makeAtomicResponse() 724 { 725 makeResponse(); 726 } 727 728 void 729 makeTimingResponse() 730 { 731 makeResponse(); 732 } 733 734 void 735 setFunctionalResponseStatus(bool success) 736 { 737 if (!success) { 738 if (isWrite()) { 739 cmd = MemCmd::FunctionalWriteError; 740 } else { 741 cmd = MemCmd::FunctionalReadError; 742 } 743 } 744 } 745 746 void 747 setSize(unsigned size) 748 { 749 assert(!flags.isSet(VALID_SIZE)); 750 751 this->size = size; 752 flags.set(VALID_SIZE); 753 } 754 755 756 /** 757 * Set the data pointer to the following value that should not be 758 * freed. Static data allows us to do a single memcpy even if 759 * multiple packets are required to get from source to destination 760 * and back. In essence the pointer is set calling dataStatic on 761 * the original packet, and whenever this packet is copied and 762 * forwarded the same pointer is passed on. When a packet 763 * eventually reaches the destination holding the data, it is 764 * copied once into the location originally set. On the way back 765 * to the source, no copies are necessary. 766 */ 767 template <typename T> 768 void 769 dataStatic(T *p) 770 { 771 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA)); 772 data = (PacketDataPtr)p; 773 flags.set(STATIC_DATA); 774 } 775 776 /** 777 * Set the data pointer to the following value that should not be 778 * freed. This version of the function allows the pointer passed 779 * to us to be const. To avoid issues down the line we cast the 780 * constness away, the alternative would be to keep both a const 781 * and non-const data pointer and cleverly choose between 782 * them. Note that this is only allowed for static data. 783 */ 784 template <typename T> 785 void 786 dataStaticConst(const T *p) 787 { 788 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA)); 789 data = const_cast<PacketDataPtr>(p); 790 flags.set(STATIC_DATA); 791 } 792 793 /** 794 * Set the data pointer to a value that should have delete [] 795 * called on it. Dynamic data is local to this packet, and as the 796 * packet travels from source to destination, forwarded packets 797 * will allocate their own data. When a packet reaches the final 798 * destination it will populate the dynamic data of that specific 799 * packet, and on the way back towards the source, memcpy will be 800 * invoked in every step where a new packet was created e.g. in 801 * the caches. Ultimately when the response reaches the source a 802 * final memcpy is needed to extract the data from the packet 803 * before it is deallocated. 804 */ 805 template <typename T> 806 void 807 dataDynamic(T *p) 808 { 809 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA)); 810 data = (PacketDataPtr)p; 811 flags.set(DYNAMIC_DATA); 812 } 813 814 /** 815 * get a pointer to the data ptr. 816 */ 817 template <typename T> 818 T* 819 getPtr() 820 { 821 assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA)); 822 return (T*)data; 823 } 824 825 template <typename T> 826 const T* 827 getConstPtr() const 828 { 829 assert(flags.isSet(STATIC_DATA|DYNAMIC_DATA)); 830 return (const T*)data; 831 } 832 833 /** 834 * return the value of what is pointed to in the packet. 835 */ 836 template <typename T> 837 T get() const; 838 839 /** 840 * set the value in the data pointer to v. 841 */ 842 template <typename T> 843 void set(T v); 844 845 /** 846 * Copy data into the packet from the provided pointer. 847 */ 848 void 849 setData(const uint8_t *p) 850 { 851 // we should never be copying data onto itself, which means we 852 // must idenfity packets with static data, as they carry the 853 // same pointer from source to destination and back 854 assert(p != getPtr<uint8_t>() || flags.isSet(STATIC_DATA)); 855 856 if (p != getPtr<uint8_t>()) 857 // for packet with allocated dynamic data, we copy data from 858 // one to the other, e.g. a forwarded response to a response 859 std::memcpy(getPtr<uint8_t>(), p, getSize()); 860 } 861 862 /** 863 * Copy data into the packet from the provided block pointer, 864 * which is aligned to the given block size. 865 */ 866 void 867 setDataFromBlock(const uint8_t *blk_data, int blkSize) 868 { 869 setData(blk_data + getOffset(blkSize)); 870 } 871 872 /** 873 * Copy data from the packet to the provided block pointer, which 874 * is aligned to the given block size. 875 */ 876 void 877 writeData(uint8_t *p) const 878 { 879 std::memcpy(p, getConstPtr<uint8_t>(), getSize()); 880 } 881 882 /** 883 * Copy data from the packet to the memory at the provided pointer. 884 */ 885 void 886 writeDataToBlock(uint8_t *blk_data, int blkSize) const 887 { 888 writeData(blk_data + getOffset(blkSize)); 889 } 890 891 /** 892 * delete the data pointed to in the data pointer. Ok to call to 893 * matter how data was allocted. 894 */ 895 void 896 deleteData() 897 { 898 if (flags.isSet(DYNAMIC_DATA)) 899 delete [] data; 900 901 flags.clear(STATIC_DATA|DYNAMIC_DATA); 902 data = NULL; 903 } 904 905 /** Allocate memory for the packet. */ 906 void 907 allocate() 908 { 909 assert(flags.noneSet(STATIC_DATA|DYNAMIC_DATA)); 910 flags.set(DYNAMIC_DATA); 911 data = new uint8_t[getSize()]; 912 } 913 914 /** 915 * Check a functional request against a memory value stored in 916 * another packet (i.e. an in-transit request or 917 * response). Returns true if the current packet is a read, and 918 * the other packet provides the data, which is then copied to the 919 * current packet. If the current packet is a write, and the other 920 * packet intersects this one, then we update the data 921 * accordingly. 922 */ 923 bool 924 checkFunctional(PacketPtr other) 925 { 926 // all packets that are carrying a payload should have a valid 927 // data pointer 928 return checkFunctional(other, other->getAddr(), other->isSecure(), 929 other->getSize(), 930 other->hasData() ? 931 other->getPtr<uint8_t>() : NULL); 932 } 933 934 /** 935 * Check a functional request against a memory value represented 936 * by a base/size pair and an associated data array. If the 937 * current packet is a read, it may be satisfied by the memory 938 * value. If the current packet is a write, it may update the 939 * memory value. 940 */ 941 bool 942 checkFunctional(Printable *obj, Addr base, bool is_secure, int size, 943 uint8_t *_data); 944 945 /** 946 * Push label for PrintReq (safe to call unconditionally). 947 */ 948 void 949 pushLabel(const std::string &lbl) 950 { 951 if (isPrint()) 952 safe_cast<PrintReqState*>(senderState)->pushLabel(lbl); 953 } 954 955 /** 956 * Pop label for PrintReq (safe to call unconditionally). 957 */ 958 void 959 popLabel() 960 { 961 if (isPrint()) 962 safe_cast<PrintReqState*>(senderState)->popLabel(); 963 } 964 965 void print(std::ostream &o, int verbosity = 0, 966 const std::string &prefix = "") const; 967 968 /** 969 * A no-args wrapper of print(std::ostream...) 970 * meant to be invoked from DPRINTFs 971 * avoiding string overheads in fast mode 972 * @return string with the request's type and start<->end addresses 973 */ 974 std::string print() const; 975}; 976 977#endif //__MEM_PACKET_HH 978