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/*
* Copyright (c) 1999-2008 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.
*
* AMD's contributions to the MOESI hammer protocol do not constitute an
* endorsement of its similarity to any AMD products.
*/
// CoherenceRequestType
enumeration(CoherenceRequestType, desc="...") {
GETX, desc="Get eXclusive";
GETS, desc="Get Shared";
MERGED_GETS, desc="Get Shared";
PUT, desc="Put Ownership";
WB_ACK, desc="Writeback ack";
WB_NACK, desc="Writeback neg. ack";
PUTF, desc="PUT on a Flush";
GETF, desc="Issue exclusive for Flushing";
BLOCK_ACK, desc="Dir Block ack";
INV, desc="Invalidate";
}
// CoherenceResponseType
enumeration(CoherenceResponseType, desc="...") {
ACK, desc="ACKnowledgment, responder does not have a copy";
ACK_SHARED, desc="ACKnowledgment, responder has a shared copy";
DATA, desc="Data, responder does not have a copy";
DATA_SHARED, desc="Data, responder has a shared copy";
DATA_EXCLUSIVE, desc="Data, responder was exclusive, gave us a copy, and they went to invalid";
WB_CLEAN, desc="Clean writeback";
WB_DIRTY, desc="Dirty writeback";
WB_EXCLUSIVE_CLEAN, desc="Clean writeback of exclusive data";
WB_EXCLUSIVE_DIRTY, desc="Dirty writeback of exclusive data";
UNBLOCK, desc="Unblock for writeback";
UNBLOCKS, desc="Unblock now in S";
UNBLOCKM, desc="Unblock now in M/O/E";
NULL, desc="Null value";
}
// TriggerType
enumeration(TriggerType, desc="...") {
L2_to_L1, desc="L2 to L1 transfer";
ALL_ACKS, desc="See corresponding event";
ALL_ACKS_OWNER_EXISTS,desc="See corresponding event";
ALL_ACKS_NO_SHARERS, desc="See corresponding event";
ALL_UNBLOCKS, desc="all unblockS received";
}
// TriggerMsg
structure(TriggerMsg, desc="...", interface="Message") {
Addr addr, desc="Physical address for this request";
TriggerType Type, desc="Type of trigger";
bool functionalRead(Packet *pkt) {
// Trigger messages do not hold any data!
return false;
}
bool functionalWrite(Packet *pkt) {
// Trigger messages do not hold any data!
return false;
}
}
// RequestMsg (and also forwarded requests)
structure(RequestMsg, desc="...", interface="Message") {
Addr addr, desc="Physical address for this request";
CoherenceRequestType Type, desc="Type of request (GetS, GetX, PutX, etc)";
MachineID Requestor, desc="Node who initiated the request";
NetDest MergedRequestors, desc="Merge set of read requestors";
NetDest Destination, desc="Multicast destination mask";
MessageSizeType MessageSize, desc="size category of the message";
bool DirectedProbe, default="false", desc="probe filter directed probe";
Cycles InitialRequestTime, default="Cycles(0)",
desc="time the initial requests was sent from the L1Cache";
Cycles ForwardRequestTime, default="Cycles(0)",
desc="time the dir forwarded the request";
int SilentAcks, default="0", desc="silent acks from the full-bit directory";
bool functionalRead(Packet *pkt) {
// Request messages do not hold any data
return false;
}
bool functionalWrite(Packet *pkt) {
// Request messages do not hold any data
return false;
}
}
// ResponseMsg (and also unblock requests)
structure(ResponseMsg, desc="...", interface="Message") {
Addr addr, desc="Physical address for this request";
CoherenceResponseType Type, desc="Type of response (Ack, Data, etc)";
MachineID Sender, desc="Node who sent the data";
MachineID CurOwner, desc="current owner of the block, used for UnblockS responses";
NetDest Destination, desc="Node to whom the data is sent";
DataBlock DataBlk, desc="data for the cache line";
bool Dirty, desc="Is the data dirty (different than memory)?";
int Acks, default="0", desc="How many messages this counts as";
MessageSizeType MessageSize, desc="size category of the message";
Cycles InitialRequestTime, default="Cycles(0)",
desc="time the initial requests was sent from the L1Cache";
Cycles ForwardRequestTime, default="Cycles(0)",
desc="time the dir forwarded the request";
int SilentAcks, default="0", desc="silent acks from the full-bit directory";
bool functionalRead(Packet *pkt) {
// The check below ensures that data is read only from messages that
// actually hold data.
if (Type == CoherenceResponseType:DATA ||
Type == CoherenceResponseType:DATA_SHARED ||
Type == CoherenceResponseType:DATA_EXCLUSIVE ||
Type == CoherenceResponseType:WB_DIRTY ||
Type == CoherenceResponseType:WB_EXCLUSIVE_DIRTY) {
return testAndRead(addr, DataBlk, pkt);
}
return false;
}
bool functionalWrite(Packet *pkt) {
// Message type does not matter since all messages are written.
// If a protocol reads data from a packet that is not supposed
// to hold the data, then the fault lies with the protocol.
return testAndWrite(addr, DataBlk, pkt);
}
}
enumeration(DMARequestType, desc="...", default="DMARequestType_NULL") {
READ, desc="Memory Read";
WRITE, desc="Memory Write";
NULL, desc="Invalid";
}
enumeration(DMAResponseType, desc="...", default="DMAResponseType_NULL") {
DATA, desc="DATA read";
ACK, desc="ACK write";
NULL, desc="Invalid";
}
structure(DMARequestMsg, desc="...", interface="Message") {
DMARequestType Type, desc="Request type (read/write)";
Addr PhysicalAddress, desc="Physical address for this request";
Addr LineAddress, desc="Line address for this request";
MachineID Requestor, desc="Node who initiated the request";
NetDest Destination, desc="Destination";
DataBlock DataBlk, desc="DataBlk attached to this request";
int Len, desc="The length of the request";
MessageSizeType MessageSize, desc="size category of the message";
bool functionalRead(Packet *pkt) {
return testAndRead(LineAddress, DataBlk, pkt);
}
bool functionalWrite(Packet *pkt) {
return testAndWrite(LineAddress, DataBlk, pkt);
}
}
structure(DMAResponseMsg, desc="...", interface="Message") {
DMAResponseType Type, desc="Response type (DATA/ACK)";
Addr PhysicalAddress, desc="Physical address for this request";
Addr LineAddress, desc="Line address for this request";
NetDest Destination, desc="Destination";
DataBlock DataBlk, desc="DataBlk attached to this request";
MessageSizeType MessageSize, desc="size category of the message";
bool functionalRead(Packet *pkt) {
return testAndRead(LineAddress, DataBlk, pkt);
}
bool functionalWrite(Packet *pkt) {
return testAndWrite(LineAddress, DataBlk, pkt);
}
}
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