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Make probeCopy have same behavior as probeDowngrade

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This commit is contained in:
Henry Cook 2016-07-18 18:22:49 -07:00 committed by Howard Mao
parent 9eeb1112d4
commit e406d1bd73
1 changed files with 23 additions and 20 deletions
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43
uncore/src/main/scala/coherence/Policies.scala
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@ -158,7 +158,7 @@ class MICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
def getReleaseType(incoming: HasProbeType, meta: ClientMetadata): UInt =
MuxLookup(incoming.p_type, releaseInvalidateAck, Array(
probeInvalidate -> getReleaseType(M_FLUSH, meta),
probeCopy -> getReleaseType(M_CLEAN, meta)))
probeCopy -> getReleaseType(M_FLUSH, meta)))
def clientMetadataOnHit(cmd: UInt, meta: ClientMetadata) = meta
@ -250,8 +250,8 @@ class MEICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
def getReleaseType(incoming: HasProbeType, meta: ClientMetadata): UInt =
MuxLookup(incoming.p_type, releaseInvalidateAck, Array(
probeInvalidate -> getReleaseType(M_FLUSH, meta),
probeDowngrade -> getReleaseType(M_PRODUCE, meta),
probeCopy -> getReleaseType(M_CLEAN, meta)))
probeDowngrade -> getReleaseType(M_FLUSH, meta),
probeCopy -> getReleaseType(M_FLUSH, meta)))
def clientMetadataOnHit(cmd: UInt, meta: ClientMetadata) =
ClientMetadata(Mux(isWrite(cmd), clientExclusiveDirty, meta.state))(meta.p)
@ -271,8 +271,8 @@ class MEICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
ClientMetadata(
MuxLookup(incoming.p_type, meta.state, Array(
probeInvalidate -> clientInvalid,
probeDowngrade -> clientExclusiveClean,
probeCopy -> meta.state)))(meta.p)
probeDowngrade -> clientInvalid,
probeCopy -> clientInvalid)))(meta.p)
// Manager states and functions:
val nManagerStates = 0 // We don't actually need any states for this protocol
@ -353,7 +353,7 @@ class MSICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
MuxLookup(incoming.p_type, releaseInvalidateAck, Array(
probeInvalidate -> getReleaseType(M_FLUSH, meta),
probeDowngrade -> getReleaseType(M_PRODUCE, meta),
probeCopy -> getReleaseType(M_CLEAN, meta)))
probeCopy -> getReleaseType(M_PRODUCE, meta)))
def clientMetadataOnHit(cmd: UInt, meta: ClientMetadata) =
ClientMetadata(Mux(isWrite(cmd), clientExclusiveDirty, meta.state))(meta.p)
@ -378,7 +378,7 @@ class MSICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
MuxLookup(incoming.p_type, meta.state, Array(
probeInvalidate -> clientInvalid,
probeDowngrade -> clientShared,
probeCopy -> meta.state)))(meta.p)
probeCopy -> clientShared)))(meta.p)
// Manager states and functions:
val nManagerStates = 0 // TODO: We could add a Shared state to avoid probing
@ -471,7 +471,7 @@ class MESICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
MuxLookup(incoming.p_type, releaseInvalidateAck, Array(
probeInvalidate -> getReleaseType(M_FLUSH, meta),
probeDowngrade -> getReleaseType(M_PRODUCE, meta),
probeCopy -> getReleaseType(M_CLEAN, meta)))
probeCopy -> getReleaseType(M_PRODUCE, meta)))
def clientMetadataOnHit(cmd: UInt, meta: ClientMetadata) =
ClientMetadata(Mux(isWrite(cmd), clientExclusiveDirty, meta.state))(meta.p)
@ -498,7 +498,7 @@ class MESICoherence(dir: DirectoryRepresentation) extends CoherencePolicy(dir) {
MuxLookup(incoming.p_type, meta.state, Array(
probeInvalidate -> clientInvalid,
probeDowngrade -> clientShared,
probeCopy -> meta.state)))(meta.p)
probeCopy -> clientShared)))(meta.p)
// Manager states and functions:
val nManagerStates = 0 // TODO: We could add a Shared state to avoid probing
@ -598,9 +598,10 @@ class MigratoryCoherence(dir: DirectoryRepresentation) extends CoherencePolicy(d
releaseInvalidateAckMigratory, releaseInvalidateAck),
probeInvalidateOthers -> Mux(clientSharedByTwo === meta.state,
releaseInvalidateAckMigratory, releaseInvalidateAck),
probeDowngrade -> Mux(meta.state =/= clientInvalid,
releaseDowngradeAckHasCopy, releaseDowngradeAck),
probeCopy -> releaseCopyAck))
probeDowngrade -> Mux(meta.state =/= clientInvalid,
releaseDowngradeAckHasCopy, releaseDowngradeAck),
probeCopy -> Mux(meta.state =/= clientInvalid,
releaseDowngradeAckHasCopy, releaseDowngradeAck)))
Mux(dirty, with_data, without_data)
}
@ -631,18 +632,20 @@ class MigratoryCoherence(dir: DirectoryRepresentation) extends CoherencePolicy(d
grantReadMigratory -> Mux(isWrite(cmd),
clientMigratoryDirty, clientMigratoryClean)))))(meta.p)
def clientMetadataOnProbe(incoming: HasProbeType, meta: ClientMetadata) =
def clientMetadataOnProbe(incoming: HasProbeType, meta: ClientMetadata) = {
val downgradeState = MuxLookup(meta.state, clientShared, Array(
clientExclusiveClean -> clientSharedByTwo,
clientExclusiveDirty -> clientSharedByTwo,
clientSharedByTwo -> clientShared,
clientMigratoryClean -> clientSharedByTwo,
clientMigratoryDirty -> clientInvalid))
ClientMetadata(
MuxLookup(incoming.p_type, meta.state, Array(
probeInvalidate -> clientInvalid,
probeInvalidateOthers -> clientInvalid,
probeCopy -> meta.state,
probeDowngrade -> MuxLookup(meta.state, clientShared, Array(
clientExclusiveClean -> clientSharedByTwo,
clientExclusiveDirty -> clientSharedByTwo,
clientSharedByTwo -> clientShared,
clientMigratoryClean -> clientSharedByTwo,
clientMigratoryDirty -> clientInvalid)))))(meta.p)
probeDowngrade -> downgradeState,
probeCopy -> downgradeState)))(meta.p)
}
// Manager states and functions:
val nManagerStates = 0 // TODO: we could add some states to reduce the number of message types