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Splitter: reuse TLCustom node instead of special diplomacy case

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This commit is contained in:
Wesley W. Terpstra
2017-09-13 13:44:06 -07:00
parent 6fa5250e1f
commit 53f6999ea8
3 changed files with 31 additions and 49 deletions
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8
src/main/scala/tilelink/Nodes.scala
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@ -95,14 +95,6 @@ case class TLNexusNode(
implicit valName: ValName)
extends NexusNode(TLImp)(clientFn, managerFn, numClientPorts, numManagerPorts)
case class TLSplitterNode(
clientFn: SplitterArg[TLClientPortParameters] => Seq[TLClientPortParameters],
managerFn: SplitterArg[TLManagerPortParameters] => Seq[TLManagerPortParameters],
numClientPorts: Range.Inclusive = 0 to 999,
numManagerPorts: Range.Inclusive = 0 to 999)(
implicit valName: ValName)
extends SplitterNode(TLImp)(clientFn, managerFn, numClientPorts, numManagerPorts)
abstract class TLCustomNode(
numClientPorts: Range.Inclusive,
numManagerPorts: Range.Inclusive)(

31
src/main/scala/tilelink/Splitter.scala
View File

@ -6,6 +6,37 @@ import Chisel._
import freechips.rocketchip.config.Parameters
import freechips.rocketchip.diplomacy._
case class SplitterArg[T](newSize: Int, ports: Seq[T])
case class TLSplitterNode(
clientFn: SplitterArg[TLClientPortParameters] => Seq[TLClientPortParameters],
managerFn: SplitterArg[TLManagerPortParameters] => Seq[TLManagerPortParameters],
numClientPorts: Range.Inclusive = 0 to 999,
numManagerPorts: Range.Inclusive = 0 to 999)(
implicit valName: ValName)
extends TLCustomNode(numClientPorts, numManagerPorts)
{
val externalIn = true
val externalOut = true
def resolveStar(iKnown: Int, oKnown: Int, iStars: Int, oStars: Int): (Int, Int) = {
require (oKnown == 0, s"${name} (a splitter) appears right of a := or :*=; use a :=* instead${lazyModule.line}")
require (iStars == 0, s"${name} (a splitter) cannot appear left of a :*=; did you mean :=*?${lazyModule.line}")
(0, iKnown)
}
def mapParamsD(n: Int, p: Seq[TLClientPortParameters]): Seq[TLClientPortParameters] = {
require (p.size == 0 || n % p.size == 0, s"Diplomacy bug; splitter inputs do not divide outputs")
val out = clientFn(SplitterArg(n, p))
require (out.size == n, s"${name} created the wrong number of outputs from inputs${lazyModule.line}")
out
}
def mapParamsU(n: Int, p: Seq[TLManagerPortParameters]): Seq[TLManagerPortParameters] = {
require (n == 0 || p.size % n == 0, s"Diplomacy bug; splitter outputs indivisable by inputs")
val out = managerFn(SplitterArg(n, p))
require (out.size == n, s"${name} created the wrong number of inputs from outputs${lazyModule.line}")
out
}
}
class TLSplitter(policy: TLArbiter.Policy = TLArbiter.roundRobin)(implicit p: Parameters) extends LazyModule
{
val node = TLSplitterNode(