91 lines
2.6 KiB
Scala
91 lines
2.6 KiB
Scala
// See LICENSE.SiFive for license details.
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package uncore.apb
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import Chisel._
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import config._
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import diplomacy._
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import scala.math.max
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case class APBSlaveParameters(
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address: Seq[AddressSet],
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resources: Seq[Resource] = Nil,
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regionType: RegionType.T = RegionType.GET_EFFECTS,
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executable: Boolean = false, // processor can execute from this memory
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nodePath: Seq[BaseNode] = Seq(),
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supportsWrite: Boolean = true,
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supportsRead: Boolean = true)
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{
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address.foreach { a => require (a.finite) }
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address.combinations(2).foreach { case Seq(x,y) => require (!x.overlaps(y)) }
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val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
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val maxAddress = address.map(_.max).max
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val minAlignment = address.map(_.alignment).min
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}
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case class APBSlavePortParameters(
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slaves: Seq[APBSlaveParameters],
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beatBytes: Int)
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{
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require (!slaves.isEmpty)
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require (isPow2(beatBytes))
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val maxAddress = slaves.map(_.maxAddress).max
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lazy val routingMask = AddressDecoder(slaves.map(_.address))
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def findSafe(address: UInt) = Vec(slaves.map(_.address.map(_.contains(address)).reduce(_ || _)))
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def findFast(address: UInt) = Vec(slaves.map(_.address.map(_.widen(~routingMask)).distinct.map(_.contains(address)).reduce(_ || _)))
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// Require disjoint ranges for addresses
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slaves.combinations(2).foreach { case Seq(x,y) =>
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x.address.foreach { a => y.address.foreach { b =>
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require (!a.overlaps(b))
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} }
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}
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}
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case class APBMasterParameters(
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nodePath: Seq[BaseNode] = Seq())
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{
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val name = nodePath.lastOption.map(_.lazyModule.name).getOrElse("disconnected")
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}
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case class APBMasterPortParameters(
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masters: Seq[APBMasterParameters])
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case class APBBundleParameters(
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addrBits: Int,
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dataBits: Int)
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{
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require (dataBits >= 8)
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require (addrBits >= 1)
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require (isPow2(dataBits))
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// Bring the globals into scope
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val protBits = APBParameters.protBits
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def union(x: APBBundleParameters) =
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APBBundleParameters(
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max(addrBits, x.addrBits),
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max(dataBits, x.dataBits))
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}
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object APBBundleParameters
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{
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val emptyBundleParams = APBBundleParameters(addrBits = 1, dataBits = 8)
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def union(x: Seq[APBBundleParameters]) = x.foldLeft(emptyBundleParams)((x,y) => x.union(y))
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def apply(master: APBMasterPortParameters, slave: APBSlavePortParameters) =
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new APBBundleParameters(
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addrBits = log2Up(slave.maxAddress+1),
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dataBits = slave.beatBytes * 8)
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}
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case class APBEdgeParameters(
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master: APBMasterPortParameters,
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slave: APBSlavePortParameters)
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{
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val bundle = APBBundleParameters(master, slave)
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}
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