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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: MSI_MOSI_CMP_directory-msg.sm 1.5 05/01/19 15:48:37-06:00 mikem@royal16.cs.wisc.edu $
*
*/
// CoherenceRequestType
enumeration(CoherenceRequestType, desc="...") {
GETX, desc="Get eXclusive";
GETX_ESCAPE, desc="Get eXclusive, while in escape action";
UPGRADE, desc="UPGRADE to exclusive";
GETS, desc="Get Shared";
GETS_ESCAPE, desc="Get Shared, while in escape action";
GET_INSTR, desc="Get Instruction";
GET_INSTR_ESCAPE, desc="Get Instruction, while in escape action";
INV, desc="INValidate, could be NACKed";
INV_ESCAPE, desc="INValidate, cannot be NACKed";
PUTX, desc="replacement message, for writeback to lower caches";
PUTS, desc="clean replacement message, for writeback to lower caches";
REPLACE, desc="replacement message, from lowest cache";
CHECK_WRITE_FILTER, desc="check write filter message";
CHECK_READ_WRITE_FILTER, desc="check both read and write filters message";
}
// CoherenceResponseType
enumeration(CoherenceResponseType, desc="...") {
MEMORY_ACK, desc="Ack from memory controller";
DATA, desc="Data";
DATA_EXCLUSIVE, desc="Data";
L2_DATA, desc="data from L2, in shared mode";
L2_DATA_EXCLUSIVE, desc="data from L2, in exclusive mode";
MEMORY_DATA, desc="Data";
ACK, desc="Generic invalidate ack";
NACK, desc="NACK used to maintain transactional isolation";
WB_ACK, desc="writeback ack";
UNBLOCK, desc="unblock";
EXCLUSIVE_UNBLOCK, desc="exclusive unblock";
UNBLOCK_CANCEL, desc="unblock when trans. request fails";
}
// RequestMsg
structure(RequestMsg, desc="...", interface="NetworkMessage") {
Address Address, desc="Line address for this request";
Address PhysicalAddress, desc="Physical address for this request";
CoherenceRequestType Type, desc="Type of request (GetS, GetX, PutX, etc)";
AccessModeType AccessMode, desc="user/supervisor access type";
MachineID Requestor , desc="What component request";
NetDest Destination, desc="What components receive the request, includes MachineType and num";
MessageSizeType MessageSize, desc="size category of the message";
DataBlock DataBlk, desc="Data for the cache line (if PUTX)";
bool Dirty, default="false", desc="Dirty bit";
PrefetchBit Prefetch, desc="Is this a prefetch request";
uint64 Timestamp, desc="TLR-like Timestamp";
}
// ResponseMsg
structure(ResponseMsg, desc="...", interface="NetworkMessage") {
Address Address, desc="Line address for this request";
Address PhysicalAddress, desc="Physical address for this request";
CoherenceResponseType Type, desc="Type of response (Ack, Data, etc)";
MachineID Sender, desc="What component sent the data";
NetDest Destination, desc="Node to whom the data is sent";
DataBlock DataBlk, desc="Data for the cache line";
bool Dirty, default="false", desc="Dirty bit";
int AckCount, default="0", desc="number of acks in this message";
MessageSizeType MessageSize, desc="size category of the message";
uint64 Timestamp, desc="TLR-like Timestamp";
NetDest Nackers, desc="The nodes which sent NACKs to requestor";
bool Transactional, desc="Whether this address was transactional";
bool RemoveLastOwnerFromDir, desc="To solve some races with PUTX/GETS";
MachineID LastOwnerID, desc="What component sent the data";
}
// TriggerType
enumeration(TriggerType, desc="...") {
ALL_ACKS, desc="When all acks/nacks have been received";
}
// TriggerMsg
structure(TriggerMsg, desc="...", interface="Message") {
Address Address, desc="Line address for this request";
Address PhysicalAddress, desc="Physical address for this request";
TriggerType Type, desc="Type of trigger";
}
/*
GETX, desc="Get eXclusive";
UPGRADE, desc="UPGRADE to exclusive";
GETS, desc="Get Shared";
GET_INSTR, desc="Get Instruction";
INV, desc="INValidate";
PUTX, desc="replacement message, for writeback to lower caches";
REPLACE, desc="replacement message, from lowest cache";
CHECK_WRITE_FILTER, desc="check write filter message";
CHECK_READ_WRITE_FILTER, desc="check both read and write filters message";
*/
GenericRequestType convertToGenericType(CoherenceRequestType type) {
if(type == CoherenceRequestType:PUTX) {
return GenericRequestType:PUTX;
} else if(type == CoherenceRequestType:GETS) {
return GenericRequestType:GETS;
} else if(type == CoherenceRequestType:GETS_ESCAPE) {
return GenericRequestType:GETS;
} else if(type == CoherenceRequestType:GET_INSTR) {
return GenericRequestType:GET_INSTR;
} else if(type == CoherenceRequestType:GET_INSTR_ESCAPE) {
return GenericRequestType:GET_INSTR;
} else if(type == CoherenceRequestType:GETX) {
return GenericRequestType:GETX;
} else if(type == CoherenceRequestType:GETX_ESCAPE) {
return GenericRequestType:GETX;
} else if(type == CoherenceRequestType:UPGRADE) {
return GenericRequestType:UPGRADE;
} else if(type == CoherenceRequestType:INV) {
return GenericRequestType:INV;
} else if( type == CoherenceRequestType:REPLACE) {
return GenericRequestType:REPLACEMENT;
} else {
DEBUG_EXPR(type);
error("invalid CoherenceRequestType");
}
}
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