1
0

unified coherence trait functions

This commit is contained in:
Henry Cook 2012-03-06 17:33:11 -08:00
parent 3dd404dcf4
commit 47a2097507

View File

@ -126,7 +126,15 @@ trait ThreeStateIncoherence extends CoherencePolicy {
val (read, write) = cpuCmdToRW(cmd)
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 {
@ -162,7 +170,7 @@ trait FourStateCoherence extends CoherencePolicy {
val (read, write) = cpuCmdToRW(cmd)
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(
X_REP_READ_SHARED -> tileShared,
X_REP_READ_EXCLUSIVE -> Mux(outstanding.t_type === X_INIT_READ_EXCLUSIVE, tileExclusiveDirty, tileExclusiveClean),