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tilelink2: clarify use of Isolation

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This commit is contained in:
Wesley W. Terpstra 2016-10-07 15:01:47 -07:00
parent 76388117bb
commit 97af07eb3e
1 changed files with 5 additions and 3 deletions
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8
src/main/scala/uncore/tilelink2/Isolation.scala
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@ -6,6 +6,7 @@ import Chisel._
import chisel3.internal.sourceinfo.SourceInfo
import diplomacy._
// READ the comments in the TLIsolation object before you instantiate this module
class TLIsolation(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt) extends LazyModule
{
val node = TLAsyncIdentityNode()
@ -67,9 +68,10 @@ class TLIsolation(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt) extends
object TLIsolation
{
// applied to the TL source node; y.node := TLIsolation(fOut, fIn)(x.node)
// f should insert an isolation gate between the input UInt and its result
// fOut is applied for data flowing from client to manager
// fIn is applied for data flowing from manager to client
// f* should insert an isolation gate between the input UInt and its result
// fOut is applied to data flowing from client to manager
// fIn is applied to data flowing from manager to client
// **** WARNING: the isolation functions must bring the values to 0 ****
def apply(fOut: (Bool, UInt) => UInt, fIn: (Bool, UInt) => UInt)(x: TLAsyncOutwardNode)(implicit sourceInfo: SourceInfo): (TLAsyncOutwardNode, () => (Bool, Bool)) = {
val iso = LazyModule(new TLIsolation(fOut, fIn))
iso.node := x