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-rw-r--r--src/mem/protocol/MOESI_hammer-cache.sm138
-rw-r--r--src/mem/protocol/MOESI_hammer-msg.sm1
2 files changed, 128 insertions, 11 deletions
diff --git a/src/mem/protocol/MOESI_hammer-cache.sm b/src/mem/protocol/MOESI_hammer-cache.sm
index bb9b8b772..44ae479c7 100644
--- a/src/mem/protocol/MOESI_hammer-cache.sm
+++ b/src/mem/protocol/MOESI_hammer-cache.sm
@@ -39,7 +39,8 @@ machine(L1Cache, "AMD Hammer-like protocol")
CacheMemory * L1DcacheMemory,
CacheMemory * L2cacheMemory,
int cache_response_latency = 10,
- int issue_latency = 2
+ int issue_latency = 2,
+ int l2_cache_hit_latency = 10
{
// NETWORK BUFFERS
@@ -72,6 +73,11 @@ machine(L1Cache, "AMD Hammer-like protocol")
OI, "OI", desc="Issued PutO, waiting for ack";
MI, "MI", desc="Issued PutX, waiting for ack";
II, "II", desc="Issued PutX/O, saw Other_GETS or Other_GETX, waiting for ack";
+ IT, "IT", desc="Invalid block transferring to L1";
+ ST, "ST", desc="S block transferring to L1";
+ OT, "OT", desc="O block transferring to L1";
+ MT, "MT", desc="M block transferring to L1";
+ MMT, "MMT", desc="MM block transferring to L1";
}
// EVENTS
@@ -81,8 +87,9 @@ machine(L1Cache, "AMD Hammer-like protocol")
Store, desc="Store request from the processor";
L2_Replacement, desc="L2 Replacement";
L1_to_L2, desc="L1 to L2 transfer";
- L2_to_L1D, desc="L2 to L1-Data transfer";
- L2_to_L1I, desc="L2 to L1-Instruction transfer";
+ Trigger_L2_to_L1D, desc="Trigger L2 to L1-Data transfer";
+ Trigger_L2_to_L1I, desc="Trigger L2 to L1-Instruction transfer";
+ Complete_L2_to_L1, desc="L2 to L1 transfer completed";
// Requests
Other_GETX, desc="A GetX from another processor";
@@ -251,7 +258,9 @@ machine(L1Cache, "AMD Hammer-like protocol")
in_port(triggerQueue_in, TriggerMsg, triggerQueue) {
if (triggerQueue_in.isReady()) {
peek(triggerQueue_in, TriggerMsg) {
- if (in_msg.Type == TriggerType:ALL_ACKS) {
+ if (in_msg.Type == TriggerType:L2_to_L1) {
+ trigger(Event:Complete_L2_to_L1, in_msg.Address);
+ } else if (in_msg.Type == TriggerType:ALL_ACKS) {
trigger(Event:All_acks, in_msg.Address);
} else if (in_msg.Type == TriggerType:ALL_ACKS_NO_SHARERS) {
trigger(Event:All_acks_no_sharers, in_msg.Address);
@@ -334,7 +343,7 @@ machine(L1Cache, "AMD Hammer-like protocol")
// L1 does't have the line, but we have space for it in the L1
if (L2cacheMemory.isTagPresent(in_msg.LineAddress)) {
// L2 has it (maybe not with the right permissions)
- trigger(Event:L2_to_L1I, in_msg.LineAddress);
+ trigger(Event:Trigger_L2_to_L1I, in_msg.LineAddress);
} else {
// We have room, the L2 doesn't have it, so the L1 fetches the line
trigger(mandatory_request_type_to_event(in_msg.Type), in_msg.LineAddress);
@@ -371,7 +380,7 @@ machine(L1Cache, "AMD Hammer-like protocol")
// L1 does't have the line, but we have space for it in the L1
if (L2cacheMemory.isTagPresent(in_msg.LineAddress)) {
// L2 has it (maybe not with the right permissions)
- trigger(Event:L2_to_L1D, in_msg.LineAddress);
+ trigger(Event:Trigger_L2_to_L1D, in_msg.LineAddress);
} else {
// We have room, the L2 doesn't have it, so the L1 fetches the line
trigger(mandatory_request_type_to_event(in_msg.Type), in_msg.LineAddress);
@@ -594,6 +603,13 @@ machine(L1Cache, "AMD Hammer-like protocol")
responseToCache_in.dequeue();
}
+ action(ll_L2toL1Transfer, "ll", desc="") {
+ enqueue(triggerQueue_out, TriggerMsg, latency=l2_cache_hit_latency) {
+ out_msg.Address := address;
+ out_msg.Type := TriggerType:L2_to_L1;
+ }
+ }
+
action(o_checkForCompletion, "o", desc="Check if we have received all the messages required for completion") {
if (TBEs[address].NumPendingMsgs == 0) {
enqueue(triggerQueue_out, TriggerMsg) {
@@ -766,7 +782,7 @@ machine(L1Cache, "AMD Hammer-like protocol")
//*****************************************************
// Transitions for Load/Store/L2_Replacement from transient states
- transition({IM, SM, ISM, OM, IS, SS, OI, MI, II}, {Store, L2_Replacement}) {
+ transition({IM, SM, ISM, OM, IS, SS, OI, MI, II, IT, ST, OT, MT, MMT}, {Store, L2_Replacement}) {
zz_recycleMandatoryQueue;
}
@@ -774,14 +790,18 @@ machine(L1Cache, "AMD Hammer-like protocol")
zz_recycleMandatoryQueue;
}
- transition({IM, IS, OI, MI, II}, {Load, Ifetch}) {
+ transition({IM, IS, OI, MI, II, IT, ST, OT, MT, MMT}, {Load, Ifetch}) {
zz_recycleMandatoryQueue;
}
- transition({IM, SM, ISM, OM, IS, SS, MM_W, M_W, OI, MI, II}, L1_to_L2) {
+ transition({IM, SM, ISM, OM, IS, SS, MM_W, M_W, OI, MI, II, IT, ST, OT, MT, MMT}, L1_to_L2) {
zz_recycleMandatoryQueue;
}
+ transition({IT, ST, OT, MT, MMT}, {Other_GETX, Other_GETS}) {
+ // stall
+ }
+
// Transitions moving data between the L1 and L2 caches
transition({I, S, O, M, MM}, L1_to_L2) {
vv_allocateL2CacheBlock;
@@ -789,18 +809,114 @@ machine(L1Cache, "AMD Hammer-like protocol")
gg_deallocateL1CacheBlock;
}
- transition({I, S, O, M, MM}, L2_to_L1D) {
+ transition(I, Trigger_L2_to_L1D, IT) {
ii_allocateL1DCacheBlock;
tt_copyFromL2toL1; // Not really needed for state I
uu_profileMiss;
rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(S, Trigger_L2_to_L1D, ST) {
+ ii_allocateL1DCacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(O, Trigger_L2_to_L1D, OT) {
+ ii_allocateL1DCacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(M, Trigger_L2_to_L1D, MT) {
+ ii_allocateL1DCacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(MM, Trigger_L2_to_L1D, MMT) {
+ ii_allocateL1DCacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
}
- transition({I, S, O, M, MM}, L2_to_L1I) {
+ transition(I, Trigger_L2_to_L1I, IT) {
jj_allocateL1ICacheBlock;
tt_copyFromL2toL1; // Not really needed for state I
uu_profileMiss;
rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(S, Trigger_L2_to_L1I, ST) {
+ jj_allocateL1ICacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(O, Trigger_L2_to_L1I, OT) {
+ jj_allocateL1ICacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(M, Trigger_L2_to_L1I, MT) {
+ jj_allocateL1ICacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(MM, Trigger_L2_to_L1I, MMT) {
+ jj_allocateL1ICacheBlock;
+ tt_copyFromL2toL1;
+ uu_profileMiss;
+ rr_deallocateL2CacheBlock;
+ zz_recycleMandatoryQueue;
+ ll_L2toL1Transfer;
+ }
+
+ transition(IT, Complete_L2_to_L1, I) {
+ j_popTriggerQueue;
+ }
+
+ transition(ST, Complete_L2_to_L1, S) {
+ j_popTriggerQueue;
+ }
+
+ transition(OT, Complete_L2_to_L1, O) {
+ j_popTriggerQueue;
+ }
+
+ transition(MT, Complete_L2_to_L1, M) {
+ j_popTriggerQueue;
+ }
+
+ transition(MMT, Complete_L2_to_L1, MM) {
+ j_popTriggerQueue;
}
// Transitions from Idle
diff --git a/src/mem/protocol/MOESI_hammer-msg.sm b/src/mem/protocol/MOESI_hammer-msg.sm
index 5d8226eb6..4856178a1 100644
--- a/src/mem/protocol/MOESI_hammer-msg.sm
+++ b/src/mem/protocol/MOESI_hammer-msg.sm
@@ -55,6 +55,7 @@ enumeration(CoherenceResponseType, desc="...") {
// TriggerType
enumeration(TriggerType, desc="...") {
+ L2_to_L1, desc="L2 to L1 transfer";
ALL_ACKS, desc="See corresponding event";
ALL_ACKS_NO_SHARERS, desc="See corresponding event";
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 00:25:46 +0000