2f30950143
We eventually plan to replace the m5 cache hierarchy with the GEMS hierarchy, but for now we will make both live alongside eachother.
154 lines
6.8 KiB
Plaintext
154 lines
6.8 KiB
Plaintext
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/*
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* Copyright (c) 1999-2005 Mark D. Hill and David A. Wood
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* $Id: MSI_MOSI_CMP_directory-msg.sm 1.5 05/01/19 15:48:37-06:00 mikem@royal16.cs.wisc.edu $
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*
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*/
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// CoherenceRequestType
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enumeration(CoherenceRequestType, desc="...") {
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GETX, desc="Get eXclusive";
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GETX_ESCAPE, desc="Get eXclusive, while in escape action";
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UPGRADE, desc="UPGRADE to exclusive";
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GETS, desc="Get Shared";
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GETS_ESCAPE, desc="Get Shared, while in escape action";
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GET_INSTR, desc="Get Instruction";
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GET_INSTR_ESCAPE, desc="Get Instruction, while in escape action";
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INV, desc="INValidate, could be NACKed";
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INV_ESCAPE, desc="INValidate, cannot be NACKed";
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PUTX, desc="replacement message, for writeback to lower caches";
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PUTS, desc="clean replacement message, for writeback to lower caches";
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REPLACE, desc="replacement message, from lowest cache";
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CHECK_WRITE_FILTER, desc="check write filter message";
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CHECK_READ_WRITE_FILTER, desc="check both read and write filters message";
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}
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// CoherenceResponseType
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enumeration(CoherenceResponseType, desc="...") {
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MEMORY_ACK, desc="Ack from memory controller";
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DATA, desc="Data";
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DATA_EXCLUSIVE, desc="Data";
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L2_DATA, desc="data from L2, in shared mode";
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L2_DATA_EXCLUSIVE, desc="data from L2, in exclusive mode";
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MEMORY_DATA, desc="Data";
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ACK, desc="Generic invalidate ack";
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NACK, desc="NACK used to maintain transactional isolation";
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WB_ACK, desc="writeback ack";
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UNBLOCK, desc="unblock";
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EXCLUSIVE_UNBLOCK, desc="exclusive unblock";
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UNBLOCK_CANCEL, desc="unblock when trans. request fails";
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}
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// RequestMsg
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structure(RequestMsg, desc="...", interface="NetworkMessage") {
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Address Address, desc="Line address for this request";
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Address PhysicalAddress, desc="Physical address for this request";
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CoherenceRequestType Type, desc="Type of request (GetS, GetX, PutX, etc)";
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AccessModeType AccessMode, desc="user/supervisor access type";
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MachineID Requestor , desc="What component request";
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NetDest Destination, desc="What components receive the request, includes MachineType and num";
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MessageSizeType MessageSize, desc="size category of the message";
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DataBlock DataBlk, desc="Data for the cache line (if PUTX)";
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bool Dirty, default="false", desc="Dirty bit";
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PrefetchBit Prefetch, desc="Is this a prefetch request";
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uint64 Timestamp, desc="TLR-like Timestamp";
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}
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// ResponseMsg
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structure(ResponseMsg, desc="...", interface="NetworkMessage") {
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Address Address, desc="Line address for this request";
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Address PhysicalAddress, desc="Physical address for this request";
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CoherenceResponseType Type, desc="Type of response (Ack, Data, etc)";
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MachineID Sender, desc="What component sent the data";
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NetDest Destination, desc="Node to whom the data is sent";
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DataBlock DataBlk, desc="Data for the cache line";
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bool Dirty, default="false", desc="Dirty bit";
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int AckCount, default="0", desc="number of acks in this message";
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MessageSizeType MessageSize, desc="size category of the message";
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uint64 Timestamp, desc="TLR-like Timestamp";
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NetDest Nackers, desc="The nodes which sent NACKs to requestor";
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bool Transactional, desc="Whether this address was transactional";
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bool RemoveLastOwnerFromDir, desc="To solve some races with PUTX/GETS";
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MachineID LastOwnerID, desc="What component sent the data";
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}
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// TriggerType
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enumeration(TriggerType, desc="...") {
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ALL_ACKS, desc="When all acks/nacks have been received";
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}
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// TriggerMsg
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structure(TriggerMsg, desc="...", interface="Message") {
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Address Address, desc="Line address for this request";
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Address PhysicalAddress, desc="Physical address for this request";
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TriggerType Type, desc="Type of trigger";
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}
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/*
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GETX, desc="Get eXclusive";
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UPGRADE, desc="UPGRADE to exclusive";
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GETS, desc="Get Shared";
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GET_INSTR, desc="Get Instruction";
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INV, desc="INValidate";
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PUTX, desc="replacement message, for writeback to lower caches";
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REPLACE, desc="replacement message, from lowest cache";
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CHECK_WRITE_FILTER, desc="check write filter message";
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CHECK_READ_WRITE_FILTER, desc="check both read and write filters message";
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*/
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GenericRequestType convertToGenericType(CoherenceRequestType type) {
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if(type == CoherenceRequestType:PUTX) {
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return GenericRequestType:PUTX;
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} else if(type == CoherenceRequestType:GETS) {
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return GenericRequestType:GETS;
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} else if(type == CoherenceRequestType:GETS_ESCAPE) {
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return GenericRequestType:GETS;
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} else if(type == CoherenceRequestType:GET_INSTR) {
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return GenericRequestType:GET_INSTR;
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} else if(type == CoherenceRequestType:GET_INSTR_ESCAPE) {
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return GenericRequestType:GET_INSTR;
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} else if(type == CoherenceRequestType:GETX) {
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return GenericRequestType:GETX;
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} else if(type == CoherenceRequestType:GETX_ESCAPE) {
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return GenericRequestType:GETX;
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} else if(type == CoherenceRequestType:UPGRADE) {
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return GenericRequestType:UPGRADE;
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} else if(type == CoherenceRequestType:INV) {
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return GenericRequestType:INV;
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} else if( type == CoherenceRequestType:REPLACE) {
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return GenericRequestType:REPLACEMENT;
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} else {
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DEBUG_EXPR(type);
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error("invalid CoherenceRequestType");
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}
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}
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