diff options
Diffstat (limited to 'src/mem/protocol/MOESI_hammer-dir.sm')
| -rw-r--r-- | src/mem/protocol/MOESI_hammer-dir.sm | 549 |
1 files changed, 487 insertions, 62 deletions
diff --git a/src/mem/protocol/MOESI_hammer-dir.sm b/src/mem/protocol/MOESI_hammer-dir.sm index d967c813c..ae282ba3a 100644 --- a/src/mem/protocol/MOESI_hammer-dir.sm +++ b/src/mem/protocol/MOESI_hammer-dir.sm @@ -35,8 +35,10 @@ machine(Directory, "AMD Hammer-like protocol") : DirectoryMemory * directory, + CacheMemory * probeFilter, MemoryControl * memBuffer, - int memory_controller_latency = 2 + int memory_controller_latency = 2, + bool probe_filter_enabled = false { MessageBuffer forwardFromDir, network="To", virtual_network="3", ordered="false"; @@ -56,9 +58,16 @@ machine(Directory, "AMD Hammer-like protocol") // STATES enumeration(State, desc="Directory states", default="Directory_State_E") { // Base states - NO, desc="Not Owner"; - O, desc="Owner"; - E, desc="Exclusive Owner (we can provide the data in exclusive)"; + NX, desc="Not Owner, probe filter entry exists, block in O at Owner"; + NO, desc="Not Owner, probe filter entry exists, block in E/M at Owner"; + S, desc="Data clean, probe filter entry exists pointing to the current owner"; + O, desc="Data clean, probe filter entry exists"; + E, desc="Exclusive Owner, no probe filter entry"; + + O_R, desc="Was data Owner, replacing probe filter entry"; + S_R, desc="Was Not Owner or Sharer, replacing probe filter entry"; + NO_R, desc="Was Not Owner or Sharer, replacing probe filter entry"; + NO_B, "NO^B", desc="Not Owner, Blocked"; O_B, "O^B", desc="Owner, Blocked"; NO_B_W, desc="Not Owner, Blocked, waiting for Dram"; @@ -83,11 +92,16 @@ machine(Directory, "AMD Hammer-like protocol") GETS, desc="A GETS arrives"; PUT, desc="A PUT arrives"; Unblock, desc="An unblock message arrives"; + UnblockS, desc="An unblock message arrives"; + UnblockM, desc="An unblock message arrives"; Writeback_Clean, desc="The final part of a PutX (no data)"; Writeback_Dirty, desc="The final part of a PutX (data)"; Writeback_Exclusive_Clean, desc="The final part of a PutX (no data, exclusive)"; Writeback_Exclusive_Dirty, desc="The final part of a PutX (data, exclusive)"; + // Probe filter + Pf_Replacement, desc="probe filter replacement"; + // DMA requests DMA_READ, desc="A DMA Read memory request"; DMA_WRITE, desc="A DMA Write memory request"; @@ -100,10 +114,12 @@ machine(Directory, "AMD Hammer-like protocol") Ack, desc="Received an ack message"; Shared_Ack, desc="Received an ack message, responder has a shared copy"; Shared_Data, desc="Received a data message, responder has a shared copy"; + Data, desc="Received a data message, responder had a owner or exclusive copy, they gave it to us"; Exclusive_Data, desc="Received a data message, responder had an exclusive copy, they gave it to us"; // Triggers - All_acks_and_data, desc="Received all required data and message acks"; + All_acks_and_shared_data, desc="Received shared data and message acks"; + All_acks_and_owner_data, desc="Received shared data and message acks"; All_acks_and_data_no_sharers, desc="Received all acks and no other processor has a shared copy"; } @@ -115,18 +131,27 @@ machine(Directory, "AMD Hammer-like protocol") DataBlock DataBlk, desc="data for the block"; } + // ProbeFilterEntry + structure(PfEntry, desc="...", interface="AbstractCacheEntry") { + State PfState, desc="Directory state"; + MachineID Owner, desc="Owner node"; + DataBlock DataBlk, desc="data for the block"; + } + // TBE entries for DMA requests structure(TBE, desc="TBE entries for outstanding DMA requests") { Address PhysicalAddress, desc="physical address"; State TBEState, desc="Transient State"; CoherenceResponseType ResponseType, desc="The type for the subsequent response message"; + int Acks, default="0", desc="The number of acks that the waiting response represents"; DataBlock DmaDataBlk, desc="DMA Data to be written. Partial blocks need to merged with system memory"; DataBlock DataBlk, desc="The current view of system memory"; int Len, desc="..."; MachineID DmaRequestor, desc="DMA requestor"; int NumPendingMsgs, desc="Number of pending acks/messages"; - bool CacheDirty, desc="Indicates whether a cache has responded with dirty data"; - bool Sharers, desc="Indicates whether a cache has indicated it is currently a sharer"; + bool CacheDirty, default="false", desc="Indicates whether a cache has responded with dirty data"; + bool Sharers, default="false", desc="Indicates whether a cache has indicated it is currently a sharer"; + bool Owned, default="false", desc="Indicates whether a cache has indicated it is currently a sharer"; } external_type(TBETable) { @@ -144,10 +169,21 @@ machine(Directory, "AMD Hammer-like protocol") return static_cast(Entry, directory[addr]); } + PfEntry getPfEntry(Address addr), return_by_ref="yes" { + return static_cast(PfEntry, probeFilter[addr]); + } + State getState(Address addr) { if (TBEs.isPresent(addr)) { return TBEs[addr].TBEState; } else { + if (probe_filter_enabled) { + if (probeFilter.isTagPresent(addr)) { + assert(getPfEntry(addr).PfState == getDirectoryEntry(addr).DirectoryState); + } else { + assert(getDirectoryEntry(addr).DirectoryState == State:E); + } + } return getDirectoryEntry(addr).DirectoryState; } } @@ -156,9 +192,31 @@ machine(Directory, "AMD Hammer-like protocol") if (TBEs.isPresent(addr)) { TBEs[addr].TBEState := state; } + if (probe_filter_enabled) { + if (probeFilter.isTagPresent(addr)) { + getPfEntry(addr).PfState := state; + } + if (state == State:NX || state == State:NO || state == State:S || state == State:O) { + assert(probeFilter.isTagPresent(addr)); + } + } + if (state == State:E || state == State:NX || state == State:NO || state == State:S || + state == State:O) { + assert(TBEs.isPresent(addr) == false); + } getDirectoryEntry(addr).DirectoryState := state; } + Event cache_request_to_event(CoherenceRequestType type) { + if (type == CoherenceRequestType:GETS) { + return Event:GETS; + } else if (type == CoherenceRequestType:GETX) { + return Event:GETX; + } else { + error("Invalid CoherenceRequestType"); + } + } + MessageBuffer triggerQueue, ordered="true"; // ** OUT_PORTS ** @@ -180,7 +238,9 @@ machine(Directory, "AMD Hammer-like protocol") if (triggerQueue_in.isReady()) { peek(triggerQueue_in, TriggerMsg) { if (in_msg.Type == TriggerType:ALL_ACKS) { - trigger(Event:All_acks_and_data, in_msg.Address); + trigger(Event:All_acks_and_owner_data, in_msg.Address); + } else if (in_msg.Type == TriggerType:ALL_ACKS_OWNER_EXISTS) { + trigger(Event:All_acks_and_shared_data, in_msg.Address); } else if (in_msg.Type == TriggerType:ALL_ACKS_NO_SHARERS) { trigger(Event:All_acks_and_data_no_sharers, in_msg.Address); } else { @@ -195,6 +255,10 @@ machine(Directory, "AMD Hammer-like protocol") peek(unblockNetwork_in, ResponseMsg) { if (in_msg.Type == CoherenceResponseType:UNBLOCK) { trigger(Event:Unblock, in_msg.Address); + } else if (in_msg.Type == CoherenceResponseType:UNBLOCKS) { + trigger(Event:UnblockS, in_msg.Address); + } else if (in_msg.Type == CoherenceResponseType:UNBLOCKM) { + trigger(Event:UnblockM, in_msg.Address); } else if (in_msg.Type == CoherenceResponseType:WB_CLEAN) { trigger(Event:Writeback_Clean, in_msg.Address); } else if (in_msg.Type == CoherenceResponseType:WB_DIRTY) { @@ -220,8 +284,9 @@ machine(Directory, "AMD Hammer-like protocol") trigger(Event:Shared_Ack, in_msg.Address); } else if (in_msg.Type == CoherenceResponseType:DATA_SHARED) { trigger(Event:Shared_Data, in_msg.Address); - } else if (in_msg.Type == CoherenceResponseType:DATA_EXCLUSIVE || - in_msg.Type == CoherenceResponseType:DATA) { + } else if (in_msg.Type == CoherenceResponseType:DATA) { + trigger(Event:Data, in_msg.Address); + } else if (in_msg.Type == CoherenceResponseType:DATA_EXCLUSIVE) { trigger(Event:Exclusive_Data, in_msg.Address); } else { error("Unexpected message"); @@ -247,14 +312,22 @@ machine(Directory, "AMD Hammer-like protocol") in_port(requestQueue_in, RequestMsg, requestToDir) { if (requestQueue_in.isReady()) { peek(requestQueue_in, RequestMsg) { - if (in_msg.Type == CoherenceRequestType:GETS) { - trigger(Event:GETS, in_msg.Address); - } else if (in_msg.Type == CoherenceRequestType:GETX) { - trigger(Event:GETX, in_msg.Address); - } else if (in_msg.Type == CoherenceRequestType:PUT) { + if (in_msg.Type == CoherenceRequestType:PUT) { trigger(Event:PUT, in_msg.Address); } else { - error("Invalid message"); + if (probe_filter_enabled) { + if (probeFilter.isTagPresent(in_msg.Address)) { + trigger(cache_request_to_event(in_msg.Type), in_msg.Address); + } else { + if (probeFilter.cacheAvail(in_msg.Address)) { + trigger(cache_request_to_event(in_msg.Type), in_msg.Address); + } else { + trigger(Event:Pf_Replacement, probeFilter.cacheProbe(in_msg.Address)); + } + } + } else { + trigger(cache_request_to_event(in_msg.Type), in_msg.Address); + } } } } @@ -278,6 +351,31 @@ machine(Directory, "AMD Hammer-like protocol") // Actions + action(r_setMRU, "\rr", desc="manually set the MRU bit for pf entry" ) { + if (probe_filter_enabled) { + assert(probeFilter.isTagPresent(address)); + probeFilter.setMRU(address); + } + } + + action(auno_assertUnblockerNotOwner, "auno", desc="assert unblocker not owner") { + if (probe_filter_enabled) { + assert(probeFilter.isTagPresent(address)); + peek(unblockNetwork_in, ResponseMsg) { + assert(getPfEntry(address).Owner != in_msg.Sender); + } + } + } + + action(uo_updateOwnerIfPf, "uo", desc="update owner") { + if (probe_filter_enabled) { + assert(probeFilter.isTagPresent(address)); + peek(unblockNetwork_in, ResponseMsg) { + getPfEntry(address).Owner := in_msg.Sender; + } + } + } + action(a_sendWriteBackAck, "a", desc="Send writeback ack to requestor") { peek(requestQueue_in, RequestMsg) { enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { @@ -302,6 +400,27 @@ machine(Directory, "AMD Hammer-like protocol") } } + action(pfa_probeFilterAllocate, "pfa", desc="Allocate ProbeFilterEntry") { + if (probe_filter_enabled) { + peek(requestQueue_in, RequestMsg) { + probeFilter.allocate(address, new PfEntry); + getPfEntry(in_msg.Address).Owner := in_msg.Requestor; + } + } + } + + action(pfd_probeFilterDeallocate, "pfd", desc="Deallocate ProbeFilterEntry") { + if (probe_filter_enabled) { + probeFilter.deallocate(address); + } + } + + action(ppfd_possibleProbeFilterDeallocate, "ppfd", desc="Deallocate ProbeFilterEntry") { + if (probe_filter_enabled && probeFilter.isTagPresent(address)) { + probeFilter.deallocate(address); + } + } + action(v_allocateTBE, "v", desc="Allocate TBE") { peek(requestQueue_in, RequestMsg) { TBEs.allocate(address); @@ -330,10 +449,30 @@ machine(Directory, "AMD Hammer-like protocol") } } + action(pa_setPendingMsgsToAll, "pa", desc="set pending msgs to all") { + TBEs[address].NumPendingMsgs := machineCount(MachineType:L1Cache); + } + + action(po_setPendingMsgsToOne, "po", desc="set pending msgs to one") { + TBEs[address].NumPendingMsgs := 1; + } + action(w_deallocateTBE, "w", desc="Deallocate TBE") { TBEs.deallocate(address); } + action(sa_setAcksToOne, "sa", desc="Forwarded request, set the ack amount to one") { + TBEs[address].Acks := 1; + } + + action(saa_setAcksToAllIfPF, "saa", desc="Non-forwarded request, set the ack amount to all") { + if (probe_filter_enabled) { + TBEs[address].Acks := machineCount(MachineType:L1Cache); + } else { + TBEs[address].Acks := 1; + } + } + action(m_decrementNumberOfMessages, "m", desc="Decrement the number of messages for which we're waiting") { peek(responseToDir_in, ResponseMsg) { assert(in_msg.Acks > 0); @@ -357,7 +496,11 @@ machine(Directory, "AMD Hammer-like protocol") enqueue(triggerQueue_out, TriggerMsg) { out_msg.Address := address; if (TBEs[address].Sharers) { - out_msg.Type := TriggerType:ALL_ACKS; + if (TBEs[address].Owned) { + out_msg.Type := TriggerType:ALL_ACKS_OWNER_EXISTS; + } else { + out_msg.Type := TriggerType:ALL_ACKS; + } } else { out_msg.Type := TriggerType:ALL_ACKS_NO_SHARERS; } @@ -365,6 +508,22 @@ machine(Directory, "AMD Hammer-like protocol") } } + action(spa_setPendingAcksToZeroIfPF, "spa", desc="if probe filter, no need to wait for acks") { + if (probe_filter_enabled) { + TBEs[address].NumPendingMsgs := 0; + } + } + + action(sc_signalCompletionIfPF, "sc", desc="indicate that we should skip waiting for cpu acks") { + if (TBEs[address].NumPendingMsgs == 0) { + assert(probe_filter_enabled); + enqueue(triggerQueue_out, TriggerMsg) { + out_msg.Address := address; + out_msg.Type := TriggerType:ALL_ACKS_NO_SHARERS; + } + } + } + action(d_sendData, "d", desc="Send data to requestor") { peek(memQueue_in, MemoryMsg) { enqueue(responseNetwork_out, ResponseMsg, latency="1") { @@ -373,8 +532,11 @@ machine(Directory, "AMD Hammer-like protocol") out_msg.Sender := machineID; out_msg.Destination.add(in_msg.OriginalRequestorMachId); out_msg.DataBlk := in_msg.DataBlk; + DEBUG_EXPR(out_msg.DataBlk); out_msg.Dirty := false; // By definition, the block is now clean - out_msg.Acks := 1; + out_msg.Acks := TBEs[address].Acks; + DEBUG_EXPR(out_msg.Acks); + assert(out_msg.Acks > 0); out_msg.MessageSize := MessageSizeType:Response_Data; } } @@ -440,6 +602,11 @@ machine(Directory, "AMD Hammer-like protocol") TBEs[address].Sharers := true; } + action(so_setOwnerBit, "so", desc="We saw other sharers") { + TBEs[address].Sharers := true; + TBEs[address].Owned := true; + } + action(qf_queueMemoryFetchRequest, "qf", desc="Queue off-chip fetch request") { peek(requestQueue_in, RequestMsg) { enqueue(memQueue_out, MemoryMsg, latency="1") { @@ -468,8 +635,8 @@ machine(Directory, "AMD Hammer-like protocol") } } - action(f_forwardRequest, "f", desc="Forward requests") { - if (machineCount(MachineType:L1Cache) > 1) { + action(fn_forwardRequestIfNecessary, "fn", desc="Forward requests if necessary") { + if ((machineCount(MachineType:L1Cache) > 1) && (TBEs[address].Acks <= 1)) { peek(requestQueue_in, RequestMsg) { enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { out_msg.Address := address; @@ -483,34 +650,105 @@ machine(Directory, "AMD Hammer-like protocol") } } - action(f_forwardWriteFromDma, "fw", desc="Forward requests") { - peek(dmaRequestQueue_in, DMARequestMsg) { + action(ia_invalidateAllRequest, "ia", desc="invalidate all copies") { + if (machineCount(MachineType:L1Cache) > 1) { enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { out_msg.Address := address; - out_msg.Type := CoherenceRequestType:GETX; - // - // Send to all L1 caches, since the requestor is the memory controller - // itself - // + out_msg.Type := CoherenceRequestType:INV; out_msg.Requestor := machineID; - out_msg.Destination.broadcast(MachineType:L1Cache); + out_msg.Destination.broadcast(MachineType:L1Cache); // Send to all L1 caches out_msg.MessageSize := MessageSizeType:Broadcast_Control; } } } - action(f_forwardReadFromDma, "fr", desc="Forward requests") { - peek(dmaRequestQueue_in, DMARequestMsg) { + action(io_invalidateOwnerRequest, "io", desc="invalidate all copies") { + if (machineCount(MachineType:L1Cache) > 1) { enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { out_msg.Address := address; - out_msg.Type := CoherenceRequestType:GETS; - // - // Send to all L1 caches, since the requestor is the memory controller - // itself - // + out_msg.Type := CoherenceRequestType:INV; out_msg.Requestor := machineID; - out_msg.Destination.broadcast(MachineType:L1Cache); - out_msg.MessageSize := MessageSizeType:Broadcast_Control; + out_msg.Destination.add(getPfEntry(address).Owner); + out_msg.MessageSize := MessageSizeType:Request_Control; + out_msg.DirectedProbe := true; + } + } + } + + action(fb_forwardRequestBcast, "fb", desc="Forward requests to all nodes") { + if (machineCount(MachineType:L1Cache) > 1) { + peek(requestQueue_in, RequestMsg) { + enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { + out_msg.Address := address; + out_msg.Type := in_msg.Type; + out_msg.Requestor := in_msg.Requestor; + out_msg.Destination.broadcast(MachineType:L1Cache); // Send to all L1 caches + out_msg.Destination.remove(in_msg.Requestor); // Don't include the original requestor + out_msg.MessageSize := MessageSizeType:Broadcast_Control; + } + } + } + } + + action(fc_forwardRequestConditionalOwner, "fc", desc="Forward request to one or more nodes") { + assert(machineCount(MachineType:L1Cache) > 1); + if (probe_filter_enabled) { + peek(requestQueue_in, RequestMsg) { + enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { + out_msg.Address := address; + out_msg.Type := in_msg.Type; + out_msg.Requestor := in_msg.Requestor; + out_msg.Destination.add(getPfEntry(address).Owner); + out_msg.MessageSize := MessageSizeType:Request_Control; + out_msg.DirectedProbe := true; + } + } + } else { + peek(requestQueue_in, RequestMsg) { + enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { + out_msg.Address := address; + out_msg.Type := in_msg.Type; + out_msg.Requestor := in_msg.Requestor; + out_msg.Destination.broadcast(MachineType:L1Cache); // Send to all L1 caches + out_msg.Destination.remove(in_msg.Requestor); // Don't include the original requestor + out_msg.MessageSize := MessageSizeType:Broadcast_Control; + } + } + } + } + + action(f_forwardWriteFromDma, "fw", desc="Forward requests") { + if (TBEs[address].NumPendingMsgs > 0) { + peek(dmaRequestQueue_in, DMARequestMsg) { + enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { + out_msg.Address := address; + out_msg.Type := CoherenceRequestType:GETX; + // + // Send to all L1 caches, since the requestor is the memory controller + // itself + // + out_msg.Requestor := machineID; + out_msg.Destination.broadcast(MachineType:L1Cache); + out_msg.MessageSize := MessageSizeType:Broadcast_Control; + } + } + } + } + + action(f_forwardReadFromDma, "fr", desc="Forward requests") { + if (TBEs[address].NumPendingMsgs > 0) { + peek(dmaRequestQueue_in, DMARequestMsg) { + enqueue(forwardNetwork_out, RequestMsg, latency=memory_controller_latency) { + out_msg.Address := address; + out_msg.Type := CoherenceRequestType:GETS; + // + // Send to all L1 caches, since the requestor is the memory controller + // itself + // + out_msg.Requestor := machineID; + out_msg.Destination.broadcast(MachineType:L1Cache); + out_msg.MessageSize := MessageSizeType:Broadcast_Control; + } } } } @@ -554,6 +792,14 @@ machine(Directory, "AMD Hammer-like protocol") } } + action(wr_writeResponseDataToMemory, "wr", desc="Write response data to memory") { + peek(responseToDir_in, ResponseMsg) { + getDirectoryEntry(address).DataBlk := in_msg.DataBlk; + DEBUG_EXPR(in_msg.Address); + DEBUG_EXPR(in_msg.DataBlk); + } + } + action(l_writeDataToMemory, "l", desc="Write PUTX/PUTO data to memory") { peek(unblockNetwork_in, ResponseMsg) { assert(in_msg.Dirty); @@ -565,14 +811,31 @@ machine(Directory, "AMD Hammer-like protocol") } action(dwt_writeDmaDataFromTBE, "dwt", desc="DMA Write data to memory from TBE") { + DEBUG_EXPR(getDirectoryEntry(address).DataBlk); getDirectoryEntry(address).DataBlk := TBEs[address].DataBlk; + DEBUG_EXPR(getDirectoryEntry(address).DataBlk); getDirectoryEntry(address).DataBlk.copyPartial(TBEs[address].DmaDataBlk, addressOffset(TBEs[address].PhysicalAddress), TBEs[address].Len); + DEBUG_EXPR(getDirectoryEntry(address).DataBlk); + } + + action(wdt_writeDataFromTBE, "wdt", desc="DMA Write data to memory from TBE") { + DEBUG_EXPR(getDirectoryEntry(address).DataBlk); + getDirectoryEntry(address).DataBlk := TBEs[address].DataBlk; + DEBUG_EXPR(getDirectoryEntry(address).DataBlk); } action(a_assertCacheData, "ac", desc="Assert that a cache provided the data") { assert(TBEs[address].CacheDirty); } + action(ano_assertNotOwner, "ano", desc="Assert that request is not current owner") { + if (probe_filter_enabled) { + peek(requestQueue_in, RequestMsg) { + assert(getPfEntry(address).Owner != in_msg.Requestor); + } + } + } + action(l_queueMemoryWBRequest, "lq", desc="Write PUTX data to memory") { peek(unblockNetwork_in, ResponseMsg) { enqueue(memQueue_out, MemoryMsg, latency="1") { @@ -616,75 +879,152 @@ machine(Directory, "AMD Hammer-like protocol") // Transitions out of E state transition(E, GETX, NO_B_W) { + pfa_probeFilterAllocate; v_allocateTBE; rx_recordExclusiveInTBE; + saa_setAcksToAllIfPF; qf_queueMemoryFetchRequest; - f_forwardRequest; + fn_forwardRequestIfNecessary; i_popIncomingRequestQueue; } transition(E, GETS, NO_B_W) { + pfa_probeFilterAllocate; v_allocateTBE; rx_recordExclusiveInTBE; + saa_setAcksToAllIfPF; qf_queueMemoryFetchRequest; - f_forwardRequest; + fn_forwardRequestIfNecessary; i_popIncomingRequestQueue; } transition(E, DMA_READ, NO_DR_B_W) { vd_allocateDmaRequestInTBE; qd_queueMemoryRequestFromDmaRead; + spa_setPendingAcksToZeroIfPF; f_forwardReadFromDma; p_popDmaRequestQueue; } + transition(E, DMA_WRITE, NO_DW_B_W) { + vd_allocateDmaRequestInTBE; + spa_setPendingAcksToZeroIfPF; + sc_signalCompletionIfPF; + f_forwardWriteFromDma; + p_popDmaRequestQueue; + } + // Transitions out of O state transition(O, GETX, NO_B_W) { + r_setMRU; v_allocateTBE; r_recordDataInTBE; + sa_setAcksToOne; qf_queueMemoryFetchRequest; - f_forwardRequest; + fb_forwardRequestBcast; i_popIncomingRequestQueue; } + // This transition is dumb, if a shared copy exists on-chip, then that should + // provide data, not slow off-chip dram. The problem is that the current + // caches don't provide data in S state transition(O, GETS, O_B_W) { + r_setMRU; v_allocateTBE; r_recordDataInTBE; + saa_setAcksToAllIfPF; qf_queueMemoryFetchRequest; - f_forwardRequest; + fn_forwardRequestIfNecessary; i_popIncomingRequestQueue; } transition(O, DMA_READ, O_DR_B_W) { vd_allocateDmaRequestInTBE; + spa_setPendingAcksToZeroIfPF; qd_queueMemoryRequestFromDmaRead; f_forwardReadFromDma; p_popDmaRequestQueue; } - transition({E, O, NO}, DMA_WRITE, NO_DW_B_W) { + transition(O, Pf_Replacement, O_R) { + v_allocateTBE; + pa_setPendingMsgsToAll; + ia_invalidateAllRequest; + pfd_probeFilterDeallocate; + } + + transition(S, Pf_Replacement, S_R) { + v_allocateTBE; + pa_setPendingMsgsToAll; + ia_invalidateAllRequest; + pfd_probeFilterDeallocate; + } + + transition(NO, Pf_Replacement, NO_R) { + v_allocateTBE; + po_setPendingMsgsToOne; + io_invalidateOwnerRequest; + pfd_probeFilterDeallocate; + } + + transition(NX, Pf_Replacement, NO_R) { + v_allocateTBE; + pa_setPendingMsgsToAll; + ia_invalidateAllRequest; + pfd_probeFilterDeallocate; + } + + transition({O, S, NO, NX}, DMA_WRITE, NO_DW_B_W) { vd_allocateDmaRequestInTBE; f_forwardWriteFromDma; p_popDmaRequestQueue; } // Transitions out of NO state + transition(NX, GETX, NO_B) { + r_setMRU; + fb_forwardRequestBcast; + i_popIncomingRequestQueue; + } + + // Transitions out of NO state transition(NO, GETX, NO_B) { - f_forwardRequest; + r_setMRU; + ano_assertNotOwner; + fc_forwardRequestConditionalOwner; i_popIncomingRequestQueue; } - transition(NO, GETS, NO_B) { - f_forwardRequest; + transition(S, GETX, NO_B) { + r_setMRU; + fb_forwardRequestBcast; i_popIncomingRequestQueue; } - transition(NO, PUT, WB) { + transition(S, GETS, NO_B) { + r_setMRU; + ano_assertNotOwner; + fb_forwardRequestBcast; + i_popIncomingRequestQueue; + } + + transition({NX, NO}, GETS, NO_B) { + r_setMRU; + ano_assertNotOwner; + fc_forwardRequestConditionalOwner; + i_popIncomingRequestQueue; + } + + transition({NO, NX, S}, PUT, WB) { + // + // note that the PUT requestor may not be the current owner if an invalidate + // raced with PUT + // a_sendWriteBackAck; i_popIncomingRequestQueue; } - transition(NO, DMA_READ, NO_DR_B_D) { + transition({NO, NX, S}, DMA_READ, NO_DR_B_D) { vd_allocateDmaRequestInTBE; f_forwardReadFromDma; p_popDmaRequestQueue; @@ -699,23 +1039,28 @@ machine(Directory, "AMD Hammer-like protocol") // Blocked transient states transition({NO_B, O_B, NO_DR_B_W, NO_DW_B_W, NO_B_W, NO_DR_B_D, NO_DR_B, O_DR_B, O_B_W, O_DR_B_W, NO_DW_W, - NO_W, O_W, WB, WB_E_W, WB_O_W}, - {GETS, GETX, PUT}) { + NO_W, O_W, WB, WB_E_W, WB_O_W, O_R, S_R, NO_R}, + {GETS, GETX, PUT, Pf_Replacement}) { zz_recycleRequest; } transition({NO_B, O_B, NO_DR_B_W, NO_DW_B_W, NO_B_W, NO_DR_B_D, NO_DR_B, O_DR_B, O_B_W, O_DR_B_W, NO_DW_W, - NO_W, O_W, WB, WB_E_W, WB_O_W}, + NO_W, O_W, WB, WB_E_W, WB_O_W, O_R, S_R, NO_R}, {DMA_READ, DMA_WRITE}) { y_recycleDmaRequestQueue; } - transition(NO_B, Unblock, NO) { + transition(NO_B, UnblockS, NX) { j_popIncomingUnblockQueue; } - transition(O_B, Unblock, O) { + transition(NO_B, UnblockM, NO) { + uo_updateOwnerIfPf; + j_popIncomingUnblockQueue; + } + + transition(O_B, UnblockS, O) { j_popIncomingUnblockQueue; } @@ -744,7 +1089,32 @@ machine(Directory, "AMD Hammer-like protocol") n_popResponseQueue; } - transition(NO_DR_B_W, Ack) { + transition({O_R, S_R, NO_R}, Ack) { + m_decrementNumberOfMessages; + o_checkForCompletion; + n_popResponseQueue; + } + + transition(S_R, Data) { + wr_writeResponseDataToMemory; + m_decrementNumberOfMessages; + o_checkForCompletion; + n_popResponseQueue; + } + + transition(NO_R, {Data, Exclusive_Data}) { + wr_writeResponseDataToMemory; + m_decrementNumberOfMessages; + o_checkForCompletion; + n_popResponseQueue; + } + + transition({O_R, S_R, NO_R}, All_acks_and_data_no_sharers, E) { + w_deallocateTBE; + g_popTriggerQueue; + } + + transition({NO_DR_B_W, O_DR_B_W}, Ack) { m_decrementNumberOfMessages; n_popResponseQueue; } @@ -755,6 +1125,19 @@ machine(Directory, "AMD Hammer-like protocol") n_popResponseQueue; } + transition(O_DR_B, Shared_Ack) { + m_decrementNumberOfMessages; + so_setOwnerBit; + o_checkForCompletion; + n_popResponseQueue; + } + + transition(O_DR_B_W, Shared_Ack) { + m_decrementNumberOfMessages; + so_setOwnerBit; + n_popResponseQueue; + } + transition({NO_DR_B, NO_DR_B_D}, Shared_Ack) { m_decrementNumberOfMessages; r_setSharerBit; @@ -765,7 +1148,7 @@ machine(Directory, "AMD Hammer-like protocol") transition(NO_DR_B_W, Shared_Data) { r_recordCacheData; m_decrementNumberOfMessages; - r_setSharerBit; + so_setOwnerBit; o_checkForCompletion; n_popResponseQueue; } @@ -773,48 +1156,82 @@ machine(Directory, "AMD Hammer-like protocol") transition({NO_DR_B, NO_DR_B_D}, Shared_Data) { r_recordCacheData; m_decrementNumberOfMessages; - r_setSharerBit; + so_setOwnerBit; o_checkForCompletion; n_popResponseQueue; } - transition(NO_DR_B_W, Exclusive_Data) { + transition(NO_DR_B_W, {Exclusive_Data, Data}) { r_recordCacheData; m_decrementNumberOfMessages; n_popResponseQueue; } - transition({NO_DR_B, NO_DR_B_D, NO_DW_B_W}, Exclusive_Data) { + transition({NO_DR_B, NO_DR_B_D, NO_DW_B_W}, {Exclusive_Data, Data}) { r_recordCacheData; m_decrementNumberOfMessages; o_checkForCompletion; n_popResponseQueue; } - transition(NO_DR_B, All_acks_and_data, O) { + transition(NO_DR_B, All_acks_and_owner_data, O) { + // + // Note that the DMA consistency model allows us to send the DMA device + // a response as soon as we receive valid data and prior to receiving + // all acks. However, to simplify the protocol we wait for all acks. + // + dt_sendDmaDataFromTbe; + wdt_writeDataFromTBE; + w_deallocateTBE; + g_popTriggerQueue; + } + + transition(NO_DR_B, All_acks_and_shared_data, S) { // // Note that the DMA consistency model allows us to send the DMA device // a response as soon as we receive valid data and prior to receiving // all acks. However, to simplify the protocol we wait for all acks. // dt_sendDmaDataFromTbe; + wdt_writeDataFromTBE; w_deallocateTBE; g_popTriggerQueue; } - transition(NO_DR_B_D, All_acks_and_data, O) { + transition(NO_DR_B_D, All_acks_and_owner_data, O) { // // Note that the DMA consistency model allows us to send the DMA device // a response as soon as we receive valid data and prior to receiving // all acks. However, to simplify the protocol we wait for all acks. // dt_sendDmaDataFromTbe; + wdt_writeDataFromTBE; + w_deallocateTBE; + g_popTriggerQueue; + } + + transition(NO_DR_B_D, All_acks_and_shared_data, S) { + // + // Note that the DMA consistency model allows us to send the DMA device + // a response as soon as we receive valid data and prior to receiving + // all acks. However, to simplify the protocol we wait for all acks. + // + dt_sendDmaDataFromTbe; + wdt_writeDataFromTBE; + w_deallocateTBE; + g_popTriggerQueue; + } + + transition(O_DR_B, All_acks_and_owner_data, O) { + wdt_writeDataFromTBE; w_deallocateTBE; g_popTriggerQueue; } - transition(O_DR_B, All_acks_and_data_no_sharers, O) { + transition(O_DR_B, All_acks_and_data_no_sharers, E) { + wdt_writeDataFromTBE; w_deallocateTBE; + pfd_probeFilterDeallocate; g_popTriggerQueue; } @@ -825,7 +1242,9 @@ machine(Directory, "AMD Hammer-like protocol") // all acks. However, to simplify the protocol we wait for all acks. // dt_sendDmaDataFromTbe; + wdt_writeDataFromTBE; w_deallocateTBE; + ppfd_possibleProbeFilterDeallocate; g_popTriggerQueue; } @@ -837,7 +1256,9 @@ machine(Directory, "AMD Hammer-like protocol") // all acks. However, to simplify the protocol we wait for all acks. // dt_sendDmaDataFromTbe; + wdt_writeDataFromTBE; w_deallocateTBE; + ppfd_possibleProbeFilterDeallocate; g_popTriggerQueue; } @@ -850,6 +1271,7 @@ machine(Directory, "AMD Hammer-like protocol") transition(NO_DW_W, Memory_Ack, E) { da_sendDmaAck; w_deallocateTBE; + ppfd_possibleProbeFilterDeallocate; l_popMemQueue; } @@ -859,11 +1281,11 @@ machine(Directory, "AMD Hammer-like protocol") l_popMemQueue; } - transition(NO_B_W, Unblock, NO_W) { + transition(NO_B_W, {UnblockM, UnblockS}, NO_W) { j_popIncomingUnblockQueue; } - transition(O_B_W, Unblock, O_W) { + transition(O_B_W, UnblockS, O_W) { j_popIncomingUnblockQueue; } @@ -891,6 +1313,7 @@ machine(Directory, "AMD Hammer-like protocol") } transition(WB_E_W, Memory_Ack, E) { + pfd_probeFilterDeallocate; l_popMemQueue; } @@ -905,10 +1328,12 @@ machine(Directory, "AMD Hammer-like protocol") transition(WB, Writeback_Exclusive_Clean, E) { ll_checkIncomingWriteback; + pfd_probeFilterDeallocate; j_popIncomingUnblockQueue; } transition(WB, Unblock, NO) { + auno_assertUnblockerNotOwner; j_popIncomingUnblockQueue; } } |