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ahb: new diplomacy-based AHB bus definition

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This commit is contained in:
Wesley W. Terpstra
2016-12-07 17:27:58 -08:00
committed by Henry Cook
parent 1bd8a2e239
commit 01b0f6a52b
7 changed files with 454 additions and 0 deletions
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src/main/scala/uncore/ahb/Nodes.scala Normal file
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// See LICENSE.SiFive for license details.
package uncore.ahb
import Chisel._
import chisel3.internal.sourceinfo.SourceInfo
import config._
import diplomacy._
object AHBImp extends NodeImp[AHBMasterPortParameters, AHBSlavePortParameters, AHBEdgeParameters, AHBEdgeParameters, AHBBundle]
{
def edgeO(pd: AHBMasterPortParameters, pu: AHBSlavePortParameters): AHBEdgeParameters = AHBEdgeParameters(pd, pu)
def edgeI(pd: AHBMasterPortParameters, pu: AHBSlavePortParameters): AHBEdgeParameters = AHBEdgeParameters(pd, pu)
def bundleO(eo: Seq[AHBEdgeParameters]): Vec[AHBBundle] = {
require (!eo.isEmpty)
Vec(eo.size, AHBBundle(eo.map(_.bundle).reduce(_.union(_))))
}
def bundleI(ei: Seq[AHBEdgeParameters]): Vec[AHBBundle] = {
require (!ei.isEmpty)
Vec(ei.size, AHBBundle(ei.map(_.bundle).reduce(_.union(_))))
}
def colour = "#00ccff" // bluish
override def labelI(ei: AHBEdgeParameters) = (ei.slave.beatBytes * 8).toString
override def labelO(eo: AHBEdgeParameters) = (eo.slave.beatBytes * 8).toString
def connect(bo: => AHBBundle, bi: => AHBBundle, ei: => AHBEdgeParameters)(implicit p: Parameters, sourceInfo: SourceInfo): (Option[LazyModule], () => Unit) = {
(None, () => { bi <> bo })
}
override def mixO(pd: AHBMasterPortParameters, node: OutwardNode[AHBMasterPortParameters, AHBSlavePortParameters, AHBBundle]): AHBMasterPortParameters =
pd.copy(masters = pd.masters.map { c => c.copy (nodePath = node +: c.nodePath) })
override def mixI(pu: AHBSlavePortParameters, node: InwardNode[AHBMasterPortParameters, AHBSlavePortParameters, AHBBundle]): AHBSlavePortParameters =
pu.copy(slaves = pu.slaves.map { m => m.copy (nodePath = node +: m.nodePath) })
}
// Nodes implemented inside modules
case class AHBIdentityNode() extends IdentityNode(AHBImp)
case class AHBMasterNode(portParams: AHBMasterPortParameters, numPorts: Range.Inclusive = 1 to 1)
extends SourceNode(AHBImp)(portParams, numPorts)
case class AHBSlaveNode(portParams: AHBSlavePortParameters, numPorts: Range.Inclusive = 1 to 1)
extends SinkNode(AHBImp)(portParams, numPorts)
case class AHBAdapterNode(
masterFn: Seq[AHBMasterPortParameters] => AHBMasterPortParameters,
slaveFn: Seq[AHBSlavePortParameters] => AHBSlavePortParameters,
numMasterPorts: Range.Inclusive = 1 to 1,
numSlavePorts: Range.Inclusive = 1 to 1)
extends InteriorNode(AHBImp)(masterFn, slaveFn, numMasterPorts, numSlavePorts)
// Nodes passed from an inner module
case class AHBOutputNode() extends OutputNode(AHBImp)
case class AHBInputNode() extends InputNode(AHBImp)
// Nodes used for external ports
case class AHBBlindOutputNode(portParams: AHBSlavePortParameters) extends BlindOutputNode(AHBImp)(portParams)
case class AHBBlindInputNode(portParams: AHBMasterPortParameters) extends BlindInputNode(AHBImp)(portParams)
case class AHBInternalOutputNode(portParams: AHBSlavePortParameters) extends InternalOutputNode(AHBImp)(portParams)
case class AHBInternalInputNode(portParams: AHBMasterPortParameters) extends InternalInputNode(AHBImp)(portParams)