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unified coherence trait functions

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This commit is contained in:
Henry Cook 2012-03-06 17:33:11 -08:00
parent 1e02618cc8
commit 35ffb80911
1 changed files with 10 additions and 2 deletions
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12
uncore/coherence.scala
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@ -126,7 +126,15 @@ trait ThreeStateIncoherence extends CoherencePolicy {
val (read, write) = cpuCmdToRW(cmd) val (read, write) = cpuCmdToRW(cmd)
Mux(write, tileDirty, state) Mux(write, tileDirty, state)
} }
def newTransactionOnMiss(cmd: Bits, state: UFix): UFix = X_INIT_READ_EXCLUSIVE
def newStateOnTransactionRep(cmd: Bits, incoming: TransactionReply, outstanding: TransactionInit): UFix = {
val (read, write) = cpuCmdToRW(cmd)
Mux(write, tileDirty, tileClean)
}
def needsSecondaryXact(cmd: Bits, outstanding: TransactionInit): Bool = Bool(false)
def newStateOnProbeReq(incoming: ProbeRequest, state: UFix): Bits = state
def probeReplyHasData (reply: ProbeReply): Bool = Bool(false)
def transactionInitHasData (init: TransactionInit): Bool = (init.t_type != X_INIT_WRITE_UNCACHED)
} }
trait FourStateCoherence extends CoherencePolicy { trait FourStateCoherence extends CoherencePolicy {
@ -162,7 +170,7 @@ trait FourStateCoherence extends CoherencePolicy {
val (read, write) = cpuCmdToRW(cmd) val (read, write) = cpuCmdToRW(cmd)
Mux(write, X_INIT_READ_EXCLUSIVE, X_INIT_READ_SHARED) Mux(write, X_INIT_READ_EXCLUSIVE, X_INIT_READ_SHARED)
} }
def newStateOnTransactionRep(incoming: TransactionReply, outstanding: TransactionInit): UFix = { def newStateOnTransactionRep(cmd: Bits, incoming: TransactionReply, outstanding: TransactionInit): UFix = {
MuxLookup(incoming.t_type, tileInvalid, Array( MuxLookup(incoming.t_type, tileInvalid, Array(
X_REP_READ_SHARED -> tileShared, X_REP_READ_SHARED -> tileShared,
X_REP_READ_EXCLUSIVE -> Mux(outstanding.t_type === X_INIT_READ_EXCLUSIVE, tileExclusiveDirty, tileExclusiveClean), X_REP_READ_EXCLUSIVE -> Mux(outstanding.t_type === X_INIT_READ_EXCLUSIVE, tileExclusiveDirty, tileExclusiveClean),