/* * Copyright (c) 1999-2005 Mark D. Hill and David A. Wood * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer; * redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution; * neither the name of the copyright holders nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * $Id$ * */ // CoherenceRequestType enumeration(CoherenceRequestType, desc="...") { GETX, desc="Get eXclusive"; UPGRADE, desc="UPGRADE to exclusive"; GETS, desc="Get Shared"; GET_INSTR, desc="Get Instruction"; PUTX, desc="Put eXclusive"; PUTS, desc="Put Shared"; INV, desc="INValidate"; INV_S, desc="INValidate the shared version"; L1_DG, desc="L1 cache DownGrade"; WB_ACK, desc="Write Back ACKnowledgment"; EXE_ACK, desc="EXclusivE ACKnowledgment"; } // CoherenceResponseType enumeration(CoherenceResponseType, desc="...") { ACK, desc="ACKnowledgment"; INV_ACK, desc="INValidation ACKnowledgment"; DG_ACK, desc="DownGrade ACKnowledgment"; NACK, desc="Negative ACKnowledgment"; DATA, desc="Data"; DATA_S, desc="Data to L1 cache, then imediately go to shared state"; DATA_I, desc="Data to L1 cache, then imediately go to inv state"; FINALACK, desc=""; } // RequestMsg structure(RequestMsg, desc="...", interface="NetworkMessage") { Address Address, desc="Physical address for this request"; CoherenceRequestType Type, desc="Type of request (GetS, GetX, PutX, etc)"; AccessModeType AccessMode, desc="user/supervisor access type"; MachineID RequestorMachId, desc="What component request"; NetDest Destination, desc="What components receive the request, includes MachineType and num"; DataBlock DataBlk, desc="Data for the cache line (if PUTX)"; int NumPendingExtAcks, desc="Number of acks to wait for"; // Needed for forwarded responses only MessageSizeType MessageSize, desc="size category of the message"; string L1CacheStateStr, desc="describes L1 cache block state"; string L2CacheStateStr, desc="describes L2 cache block state"; PrefetchBit Prefetch, desc="Is this a prefetch request"; } // ResponseMsg structure(ResponseMsg, desc="...", interface="NetworkMessage") { Address Address, desc="Physical address for this request"; CoherenceResponseType Type, desc="Type of response (Ack, Data, etc)"; MachineID SenderMachId, desc="What component sent the data"; NetDest Destination, desc="Node to whom the data is sent"; DataBlock DataBlk, desc="data for the cache line"; int NumPendingExtAcks, desc="Number of acks to wait for"; MessageSizeType MessageSize, desc="size category of the message"; } GenericRequestType convertToGenericType(CoherenceRequestType type) { if(type == CoherenceRequestType:PUTX) { return GenericRequestType:PUTX; } else if(type == CoherenceRequestType:GETS) { return GenericRequestType:GETS; } else if(type == CoherenceRequestType:GET_INSTR) { return GenericRequestType:GET_INSTR; } else if(type == CoherenceRequestType:GETX) { return GenericRequestType:GETX; } else if(type == CoherenceRequestType:UPGRADE) { return GenericRequestType:UPGRADE; } else if(type == CoherenceRequestType:PUTS) { return GenericRequestType:PUTS; } else if(type == CoherenceRequestType:INV) { return GenericRequestType:INV; } else if(type == CoherenceRequestType:INV_S) { return GenericRequestType:INV_S; } else if(type == CoherenceRequestType:L1_DG) { return GenericRequestType:DOWNGRADE; } else if(type == CoherenceRequestType:WB_ACK) { return GenericRequestType:WB_ACK; } else if(type == CoherenceRequestType:EXE_ACK) { return GenericRequestType:EXE_ACK; } else { DEBUG_EXPR(type); error("invalid CoherenceRequestType"); } }