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/*
* 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");
}
}
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