source and build files. source code pulled from uncore and zscale repos
This commit is contained in:
parent
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19
junctions/build.sbt
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19
junctions/build.sbt
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organization := "edu.berkeley.cs"
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version := "1.0"
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name := "junctions"
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scalaVersion := "2.10.2"
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// Provide a managed dependency on chisel if -DchiselVersion="" is supplied on the command line.
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libraryDependencies ++= (Seq("chisel").map {
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dep: String => sys.props.get(dep + "Version") map { "edu.berkeley.cs" %% dep % _ }}).flatten
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site.settings
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site.includeScaladoc()
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ghpages.settings
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git.remoteRepo := "git@github.com:ucb-bar/junctions.git"
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5
junctions/project/plugins.sbt
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5
junctions/project/plugins.sbt
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resolvers += "jgit-repo" at "http://download.eclipse.org/jgit/maven"
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addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.5.3")
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addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "0.8.1")
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250
junctions/src/main/scala/hasti.scala
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250
junctions/src/main/scala/hasti.scala
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package junctions
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import Chisel._
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abstract trait HASTIConstants
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{
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val SZ_HTRANS = 2
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val HTRANS_IDLE = UInt(0, SZ_HTRANS)
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val HTRANS_BUSY = UInt(1, SZ_HTRANS)
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val HTRANS_NONSEQ = UInt(2, SZ_HTRANS)
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val HTRANS_SEQ = UInt(3, SZ_HTRANS)
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val SZ_HBURST = 3
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val HBURST_SINGLE = UInt(0, SZ_HBURST)
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val HBURST_INCR = UInt(1, SZ_HBURST)
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val HBURST_WRAP4 = UInt(2, SZ_HBURST)
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val HBURST_INCR4 = UInt(3, SZ_HBURST)
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val HBURST_WRAP8 = UInt(4, SZ_HBURST)
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val HBURST_INCR8 = UInt(5, SZ_HBURST)
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val HBURST_WRAP16 = UInt(6, SZ_HBURST)
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val HBURST_INCR16 = UInt(7, SZ_HBURST)
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val SZ_HRESP = 1
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val HRESP_OKAY = UInt(0, SZ_HRESP)
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val HRESP_ERROR = UInt(1, SZ_HRESP)
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val SZ_HSIZE = 3
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val SZ_HPROT = 4
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// TODO: Parameterize
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val SZ_HADDR = 32
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val SZ_HDATA = 32
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def dgate(valid: Bool, b: Bits) = Fill(b.getWidth, valid) & b
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}
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class HASTIMasterIO extends Bundle
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{
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val haddr = UInt(OUTPUT, SZ_HADDR)
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val hwrite = Bool(OUTPUT)
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val hsize = UInt(OUTPUT, SZ_HSIZE)
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val hburst = UInt(OUTPUT, SZ_HBURST)
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val hprot = UInt(OUTPUT, SZ_HPROT)
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val htrans = UInt(OUTPUT, SZ_HTRANS)
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val hmastlock = Bool(OUTPUT)
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val hwdata = Bits(OUTPUT, SZ_HDATA)
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val hrdata = Bits(INPUT, SZ_HDATA)
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val hready = Bool(INPUT)
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val hresp = UInt(INPUT, SZ_HRESP)
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}
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class HASTISlaveIO extends Bundle
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{
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val haddr = UInt(INPUT, SZ_HADDR)
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val hwrite = Bool(INPUT)
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val hsize = UInt(INPUT, SZ_HSIZE)
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val hburst = UInt(INPUT, SZ_HBURST)
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val hprot = UInt(INPUT, SZ_HPROT)
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val htrans = UInt(INPUT, SZ_HTRANS)
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val hmastlock = Bool(INPUT)
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val hwdata = Bits(INPUT, SZ_HDATA)
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val hrdata = Bits(OUTPUT, SZ_HDATA)
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val hsel = Bool(INPUT)
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val hreadyin = Bool(INPUT)
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val hreadyout = Bool(OUTPUT)
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val hresp = UInt(OUTPUT, SZ_HRESP)
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}
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class HASTIBus(amap: Seq[UInt=>Bool]) extends Module
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{
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val io = new Bundle {
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val master = new HASTIMasterIO().flip
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val slaves = Vec.fill(amap.size){new HASTISlaveIO}.flip
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}
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// skid buffer
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val skb_valid = Reg(init = Bool(false))
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val skb_haddr = Reg(UInt(width = SZ_HADDR))
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val skb_hwrite = Reg(Bool())
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val skb_hsize = Reg(UInt(width = SZ_HSIZE))
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val skb_hburst = Reg(UInt(width = SZ_HBURST))
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val skb_hprot = Reg(UInt(width = SZ_HPROT))
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val skb_htrans = Reg(UInt(width = SZ_HTRANS))
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val skb_hmastlock = Reg(Bool())
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val skb_hwdata = Reg(UInt(width = SZ_HDATA))
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val master_haddr = Mux(skb_valid, skb_haddr, io.master.haddr)
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val master_hwrite = Mux(skb_valid, skb_hwrite, io.master.hwrite)
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val master_hsize = Mux(skb_valid, skb_hsize, io.master.hsize)
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val master_hburst = Mux(skb_valid, skb_hburst, io.master.hburst)
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val master_hprot = Mux(skb_valid, skb_hprot, io.master.hprot)
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val master_htrans = Mux(skb_valid, skb_htrans, io.master.htrans)
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val master_hmastlock = Mux(skb_valid, skb_hmastlock, io.master.hmastlock)
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val master_hwdata = Mux(skb_valid, skb_hwdata, io.master.hwdata)
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val hsels = PriorityEncoderOH(
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(io.slaves zip amap) map { case (s, afn) => {
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s.haddr := master_haddr
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s.hwrite := master_hwrite
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s.hsize := master_hsize
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s.hburst := master_hburst
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s.hprot := master_hprot
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s.htrans := master_htrans
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s.hmastlock := master_hmastlock
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s.hwdata := master_hwdata
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afn(master_haddr) && master_htrans.orR
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}})
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(io.slaves zip hsels) foreach { case (s, hsel) => {
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s.hsel := hsel
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s.hreadyin := skb_valid || io.master.hready
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} }
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val s1_hsels = Vec.fill(amap.size){Reg(init = Bool(false))}
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val hreadyouts = io.slaves.map(_.hreadyout)
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val master_hready = s1_hsels.reduce(_||_) === Bool(false) || Mux1H(s1_hsels, hreadyouts)
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when (master_hready) {
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val skid = s1_hsels.reduce(_||_) && (hsels zip hreadyouts).map{ case (s, r) => s && !r }.reduce(_||_)
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skb_valid := skid
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when (skid) {
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skb_haddr := io.master.haddr
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skb_hwrite := io.master.hwrite
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skb_hsize := io.master.hsize
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skb_hburst := io.master.hburst
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skb_hprot := io.master.hprot
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skb_htrans := io.master.htrans
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skb_hmastlock := io.master.hmastlock
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}
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(s1_hsels zip hsels) foreach { case (s1, s) =>
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s1 := s
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}
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}
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io.master.hready := !skb_valid && master_hready
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io.master.hrdata := Mux1H(s1_hsels, io.slaves.map(_.hrdata))
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io.master.hresp := Mux1H(s1_hsels, io.slaves.map(_.hresp))
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}
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class HASTISlaveMux(n: Int) extends Module
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{
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val io = new Bundle {
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val ins = Vec.fill(n){new HASTISlaveIO}
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val out = new HASTISlaveIO().flip
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}
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// skid buffers
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val skb_valid = Vec.fill(n){Reg(init = Bool(false))}
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val skb_haddr = Vec.fill(n){Reg(UInt(width = SZ_HADDR))}
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val skb_hwrite = Vec.fill(n){Reg(Bool())}
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val skb_hsize = Vec.fill(n){Reg(UInt(width = SZ_HSIZE))}
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val skb_hburst = Vec.fill(n){Reg(UInt(width = SZ_HBURST))}
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val skb_hprot = Vec.fill(n){Reg(UInt(width = SZ_HPROT))}
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val skb_htrans = Vec.fill(n){Reg(UInt(width = SZ_HTRANS))}
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val skb_hmastlock = Vec.fill(n){Reg(Bool())}
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val requests = (io.ins zip skb_valid) map { case (in, v) => in.hsel && in.hreadyin || v }
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val grants = PriorityEncoderOH(requests)
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val s1_grants = Vec.fill(n){Reg(init = Bool(true))}
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(s1_grants zip grants) foreach { case (g1, g) =>
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when (io.out.hreadyout) { g1 := g }
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}
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def sel[T <: Data](in: Vec[T], s1: Vec[T]) =
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Vec((skb_valid zip s1 zip in) map { case ((v, s), in) => Mux(v, s, in) })
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io.out.haddr := Mux1H(grants, sel(Vec(io.ins.map(_.haddr)), skb_haddr))
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io.out.hwrite := Mux1H(grants, sel(Vec(io.ins.map(_.hwrite)), skb_hwrite))
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io.out.hsize := Mux1H(grants, sel(Vec(io.ins.map(_.hsize)), skb_hsize))
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io.out.hburst := Mux1H(grants, sel(Vec(io.ins.map(_.hburst)), skb_hburst))
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io.out.hprot := Mux1H(grants, sel(Vec(io.ins.map(_.hprot)), skb_hprot))
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io.out.htrans := Mux1H(grants, sel(Vec(io.ins.map(_.htrans)), skb_htrans))
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io.out.hmastlock := Mux1H(grants, sel(Vec(io.ins.map(_.hmastlock)), skb_hmastlock))
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io.out.hsel := grants.reduce(_||_)
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(io.ins zipWithIndex) map { case (in, i) => {
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when (io.out.hreadyout) {
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when (grants(i)) {
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skb_valid(i) := Bool(false)
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}
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when (!grants(i) && !skb_valid(i)) {
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val valid = in.hsel && in.hreadyin
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skb_valid(i) := valid
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when (valid) { // clock-gate
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skb_haddr(i) := in.haddr
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skb_hwrite(i) := in.hwrite
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skb_hsize(i) := in.hsize
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skb_hburst(i) := in.hburst
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skb_hprot(i) := in.hprot
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skb_htrans(i) := in.htrans
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skb_hmastlock(i) := in.hmastlock
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}
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}
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}
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} }
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io.out.hwdata := Mux1H(s1_grants, io.ins.map(_.hwdata))
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io.out.hreadyin := io.out.hreadyout
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(io.ins zipWithIndex) foreach { case (in, i) => {
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val g1 = s1_grants(i)
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in.hrdata := dgate(g1, io.out.hrdata)
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in.hreadyout := io.out.hreadyout && (!skb_valid(i) || g1)
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in.hresp := dgate(g1, io.out.hresp)
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} }
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}
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class HASTIXbar(nMasters: Int, addressMap: Seq[UInt=>Bool]) extends Module
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{
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val io = new Bundle {
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val masters = Vec.fill(nMasters){new HASTIMasterIO}.flip
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val slaves = Vec.fill(addressMap.size){new HASTISlaveIO}.flip
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}
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val buses = List.fill(nMasters){Module(new HASTIBus(addressMap))}
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val muxes = List.fill(addressMap.size){Module(new HASTISlaveMux(nMasters))}
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(buses.map(b => b.io.master) zip io.masters) foreach { case (b, m) => b <> m }
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(muxes.map(m => m.io.out) zip io.slaves ) foreach { case (x, s) => x <> s }
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for (m <- 0 until nMasters; s <- 0 until addressMap.size) yield {
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buses(m).io.slaves(s) <> muxes(s).io.ins(m)
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}
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}
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class HASTISlaveToMaster extends Module
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{
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val io = new Bundle {
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val in = new HASTISlaveIO
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val out = new HASTIMasterIO
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}
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io.out.haddr := io.in.haddr
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io.out.hwrite := io.in.hwrite
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io.out.hsize := io.in.hsize
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io.out.hburst := io.in.hburst
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io.out.hprot := io.in.hprot
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io.out.htrans := Mux(io.in.hsel && io.in.hreadyin, io.in.htrans, HTRANS_IDLE)
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io.out.hmastlock := io.in.hmastlock
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io.out.hwdata := io.in.hwdata
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io.in.hrdata := io.out.hrdata
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io.in.hreadyout := io.out.hready
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io.in.hresp := io.out.hresp
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}
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374
junctions/src/main/scala/memserdes.scala
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374
junctions/src/main/scala/memserdes.scala
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@ -0,0 +1,374 @@
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// See LICENSE for license details.
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package junctions
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import Chisel._
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import scala.math._
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case object PAddrBits extends Field[Int]
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case object VAddrBits extends Field[Int]
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case object PgIdxBits extends Field[Int]
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case object PgLevels extends Field[Int]
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case object PgLevelBits extends Field[Int]
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case object ASIdBits extends Field[Int]
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case object PPNBits extends Field[Int]
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case object VPNBits extends Field[Int]
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case object MIFAddrBits extends Field[Int]
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case object MIFDataBits extends Field[Int]
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case object MIFTagBits extends Field[Int]
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case object MIFDataBeats extends Field[Int]
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trait MIFParameters extends UsesParameters {
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val mifTagBits = params(MIFTagBits)
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val mifAddrBits = params(MIFAddrBits)
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val mifDataBits = params(MIFDataBits)
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val mifDataBeats = params(MIFDataBeats)
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}
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abstract class MIFBundle extends Bundle with MIFParameters
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abstract class MIFModule extends Module with MIFParameters
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trait HasMemData extends MIFBundle {
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val data = Bits(width = mifDataBits)
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}
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trait HasMemAddr extends MIFBundle {
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val addr = UInt(width = mifAddrBits)
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}
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trait HasMemTag extends MIFBundle {
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val tag = UInt(width = mifTagBits)
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}
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class MemReqCmd extends HasMemAddr with HasMemTag {
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val rw = Bool()
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}
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class MemTag extends HasMemTag
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class MemData extends HasMemData
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class MemResp extends HasMemData with HasMemTag
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class MemIO extends Bundle {
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val req_cmd = Decoupled(new MemReqCmd)
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val req_data = Decoupled(new MemData)
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val resp = Decoupled(new MemResp).flip
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}
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class MemPipeIO extends Bundle {
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val req_cmd = Decoupled(new MemReqCmd)
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val req_data = Decoupled(new MemData)
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val resp = Valid(new MemResp).flip
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}
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class MemSerializedIO(w: Int) extends Bundle {
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val req = Decoupled(Bits(width = w))
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val resp = Valid(Bits(width = w)).flip
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}
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class MemSerdes(w: Int) extends MIFModule
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{
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val io = new Bundle {
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val wide = new MemIO().flip
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val narrow = new MemSerializedIO(w)
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}
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val abits = io.wide.req_cmd.bits.toBits.getWidth
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val dbits = io.wide.req_data.bits.toBits.getWidth
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val rbits = io.wide.resp.bits.getWidth
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val out_buf = Reg(Bits())
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val in_buf = Reg(Bits())
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val s_idle :: s_read_addr :: s_write_addr :: s_write_idle :: s_write_data :: Nil = Enum(UInt(), 5)
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val state = Reg(init=s_idle)
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val send_cnt = Reg(init=UInt(0, log2Up((max(abits, dbits)+w-1)/w)))
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val data_send_cnt = Reg(init=UInt(0, log2Up(mifDataBeats)))
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val adone = io.narrow.req.ready && send_cnt === UInt((abits-1)/w)
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val ddone = io.narrow.req.ready && send_cnt === UInt((dbits-1)/w)
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when (io.narrow.req.valid && io.narrow.req.ready) {
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send_cnt := send_cnt + UInt(1)
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out_buf := out_buf >> UInt(w)
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}
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when (io.wide.req_cmd.valid && io.wide.req_cmd.ready) {
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out_buf := io.wide.req_cmd.bits.toBits
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}
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when (io.wide.req_data.valid && io.wide.req_data.ready) {
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out_buf := io.wide.req_data.bits.toBits
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}
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io.wide.req_cmd.ready := state === s_idle
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io.wide.req_data.ready := state === s_write_idle
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io.narrow.req.valid := state === s_read_addr || state === s_write_addr || state === s_write_data
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io.narrow.req.bits := out_buf
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when (state === s_idle && io.wide.req_cmd.valid) {
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state := Mux(io.wide.req_cmd.bits.rw, s_write_addr, s_read_addr)
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}
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when (state === s_read_addr && adone) {
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state := s_idle
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send_cnt := UInt(0)
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}
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when (state === s_write_addr && adone) {
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state := s_write_idle
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send_cnt := UInt(0)
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}
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when (state === s_write_idle && io.wide.req_data.valid) {
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state := s_write_data
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}
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when (state === s_write_data && ddone) {
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data_send_cnt := data_send_cnt + UInt(1)
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state := Mux(data_send_cnt === UInt(mifDataBeats-1), s_idle, s_write_idle)
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send_cnt := UInt(0)
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}
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||||
val recv_cnt = Reg(init=UInt(0, log2Up((rbits+w-1)/w)))
|
||||
val data_recv_cnt = Reg(init=UInt(0, log2Up(mifDataBeats)))
|
||||
val resp_val = Reg(init=Bool(false))
|
||||
|
||||
resp_val := Bool(false)
|
||||
when (io.narrow.resp.valid) {
|
||||
recv_cnt := recv_cnt + UInt(1)
|
||||
when (recv_cnt === UInt((rbits-1)/w)) {
|
||||
recv_cnt := UInt(0)
|
||||
data_recv_cnt := data_recv_cnt + UInt(1)
|
||||
resp_val := Bool(true)
|
||||
}
|
||||
in_buf := Cat(io.narrow.resp.bits, in_buf((rbits+w-1)/w*w-1,w))
|
||||
}
|
||||
|
||||
io.wide.resp.valid := resp_val
|
||||
io.wide.resp.bits := io.wide.resp.bits.fromBits(in_buf)
|
||||
}
|
||||
|
||||
class MemDesserIO(w: Int) extends Bundle {
|
||||
val narrow = new MemSerializedIO(w).flip
|
||||
val wide = new MemIO
|
||||
}
|
||||
|
||||
class MemDesser(w: Int) extends Module // test rig side
|
||||
{
|
||||
val io = new MemDesserIO(w)
|
||||
val abits = io.wide.req_cmd.bits.toBits.getWidth
|
||||
val dbits = io.wide.req_data.bits.toBits.getWidth
|
||||
val rbits = io.wide.resp.bits.getWidth
|
||||
val mifDataBeats = params(MIFDataBeats)
|
||||
|
||||
require(dbits >= abits && rbits >= dbits)
|
||||
val recv_cnt = Reg(init=UInt(0, log2Up((rbits+w-1)/w)))
|
||||
val data_recv_cnt = Reg(init=UInt(0, log2Up(mifDataBeats)))
|
||||
val adone = io.narrow.req.valid && recv_cnt === UInt((abits-1)/w)
|
||||
val ddone = io.narrow.req.valid && recv_cnt === UInt((dbits-1)/w)
|
||||
val rdone = io.narrow.resp.valid && recv_cnt === UInt((rbits-1)/w)
|
||||
|
||||
val s_cmd_recv :: s_cmd :: s_data_recv :: s_data :: s_reply :: Nil = Enum(UInt(), 5)
|
||||
val state = Reg(init=s_cmd_recv)
|
||||
|
||||
val in_buf = Reg(Bits())
|
||||
when (io.narrow.req.valid && io.narrow.req.ready || io.narrow.resp.valid) {
|
||||
recv_cnt := recv_cnt + UInt(1)
|
||||
in_buf := Cat(io.narrow.req.bits, in_buf((rbits+w-1)/w*w-1,w))
|
||||
}
|
||||
io.narrow.req.ready := state === s_cmd_recv || state === s_data_recv
|
||||
|
||||
when (state === s_cmd_recv && adone) {
|
||||
state := s_cmd
|
||||
recv_cnt := UInt(0)
|
||||
}
|
||||
when (state === s_cmd && io.wide.req_cmd.ready) {
|
||||
state := Mux(io.wide.req_cmd.bits.rw, s_data_recv, s_reply)
|
||||
}
|
||||
when (state === s_data_recv && ddone) {
|
||||
state := s_data
|
||||
recv_cnt := UInt(0)
|
||||
}
|
||||
when (state === s_data && io.wide.req_data.ready) {
|
||||
state := s_data_recv
|
||||
when (data_recv_cnt === UInt(mifDataBeats-1)) {
|
||||
state := s_cmd_recv
|
||||
}
|
||||
data_recv_cnt := data_recv_cnt + UInt(1)
|
||||
}
|
||||
when (rdone) { // state === s_reply
|
||||
when (data_recv_cnt === UInt(mifDataBeats-1)) {
|
||||
state := s_cmd_recv
|
||||
}
|
||||
recv_cnt := UInt(0)
|
||||
data_recv_cnt := data_recv_cnt + UInt(1)
|
||||
}
|
||||
|
||||
val req_cmd = in_buf >> UInt(((rbits+w-1)/w - (abits+w-1)/w)*w)
|
||||
io.wide.req_cmd.valid := state === s_cmd
|
||||
io.wide.req_cmd.bits := io.wide.req_cmd.bits.fromBits(req_cmd)
|
||||
|
||||
io.wide.req_data.valid := state === s_data
|
||||
io.wide.req_data.bits.data := in_buf >> UInt(((rbits+w-1)/w - (dbits+w-1)/w)*w)
|
||||
|
||||
val dataq = Module(new Queue(new MemResp, mifDataBeats))
|
||||
dataq.io.enq <> io.wide.resp
|
||||
dataq.io.deq.ready := recv_cnt === UInt((rbits-1)/w)
|
||||
|
||||
io.narrow.resp.valid := dataq.io.deq.valid
|
||||
io.narrow.resp.bits := dataq.io.deq.bits.toBits >> (recv_cnt * UInt(w))
|
||||
}
|
||||
|
||||
class HellaFlowQueue[T <: Data](val entries: Int)(data: => T) extends Module
|
||||
{
|
||||
val io = new QueueIO(data, entries)
|
||||
require(entries > 1)
|
||||
|
||||
val do_flow = Wire(Bool())
|
||||
val do_enq = io.enq.fire() && !do_flow
|
||||
val do_deq = io.deq.fire() && !do_flow
|
||||
|
||||
val maybe_full = Reg(init=Bool(false))
|
||||
val enq_ptr = Counter(do_enq, entries)._1
|
||||
val (deq_ptr, deq_done) = Counter(do_deq, entries)
|
||||
when (do_enq != do_deq) { maybe_full := do_enq }
|
||||
|
||||
val ptr_match = enq_ptr === deq_ptr
|
||||
val empty = ptr_match && !maybe_full
|
||||
val full = ptr_match && maybe_full
|
||||
val atLeastTwo = full || enq_ptr - deq_ptr >= UInt(2)
|
||||
do_flow := empty && io.deq.ready
|
||||
|
||||
val ram = SeqMem(data, entries)
|
||||
when (do_enq) { ram.write(enq_ptr, io.enq.bits) }
|
||||
|
||||
val ren = io.deq.ready && (atLeastTwo || !io.deq.valid && !empty)
|
||||
val raddr = Mux(io.deq.valid, Mux(deq_done, UInt(0), deq_ptr + UInt(1)), deq_ptr)
|
||||
val ram_out_valid = Reg(next = ren)
|
||||
|
||||
io.deq.valid := Mux(empty, io.enq.valid, ram_out_valid)
|
||||
io.enq.ready := !full
|
||||
io.deq.bits := Mux(empty, io.enq.bits, ram.read(raddr, ren))
|
||||
}
|
||||
|
||||
class HellaQueue[T <: Data](val entries: Int)(data: => T) extends Module
|
||||
{
|
||||
val io = new QueueIO(data, entries)
|
||||
|
||||
val fq = Module(new HellaFlowQueue(entries)(data))
|
||||
io.enq <> fq.io.enq
|
||||
io.deq <> Queue(fq.io.deq, 1, pipe = true)
|
||||
}
|
||||
|
||||
object HellaQueue
|
||||
{
|
||||
def apply[T <: Data](enq: DecoupledIO[T], entries: Int) = {
|
||||
val q = Module((new HellaQueue(entries)) { enq.bits })
|
||||
q.io.enq.valid := enq.valid // not using <> so that override is allowed
|
||||
q.io.enq.bits := enq.bits
|
||||
enq.ready := q.io.enq.ready
|
||||
q.io.deq
|
||||
}
|
||||
}
|
||||
|
||||
class MemIOArbiter(val arbN: Int) extends MIFModule {
|
||||
val io = new Bundle {
|
||||
val inner = Vec.fill(arbN){new MemIO}.flip
|
||||
val outer = new MemIO
|
||||
}
|
||||
|
||||
if(arbN > 1) {
|
||||
val cmd_arb = Module(new RRArbiter(new MemReqCmd, arbN))
|
||||
val choice_q = Module(new Queue(cmd_arb.io.chosen, 4))
|
||||
val (data_cnt, data_done) = Counter(io.outer.req_data.fire(), mifDataBeats)
|
||||
|
||||
io.inner.map(_.req_cmd).zipWithIndex.zip(cmd_arb.io.in).map{ case ((req, id), arb) => {
|
||||
arb.valid := req.valid
|
||||
arb.bits := req.bits
|
||||
arb.bits.tag := Cat(req.bits.tag, UInt(id))
|
||||
req.ready := arb.ready
|
||||
}}
|
||||
io.outer.req_cmd.bits := cmd_arb.io.out.bits
|
||||
io.outer.req_cmd.valid := cmd_arb.io.out.valid && choice_q.io.enq.ready
|
||||
cmd_arb.io.out.ready := io.outer.req_cmd.ready && choice_q.io.enq.ready
|
||||
choice_q.io.enq.bits := cmd_arb.io.chosen
|
||||
choice_q.io.enq.valid := cmd_arb.io.out.fire() && cmd_arb.io.out.bits.rw
|
||||
|
||||
io.outer.req_data.bits := io.inner(choice_q.io.deq.bits).req_data.bits
|
||||
io.outer.req_data.valid := io.inner(choice_q.io.deq.bits).req_data.valid && choice_q.io.deq.valid
|
||||
io.inner.map(_.req_data.ready).zipWithIndex.foreach {
|
||||
case(r, i) => r := UInt(i) === choice_q.io.deq.bits && choice_q.io.deq.valid
|
||||
}
|
||||
choice_q.io.deq.ready := data_done
|
||||
|
||||
io.outer.resp.ready := Bool(false)
|
||||
for (i <- 0 until arbN) {
|
||||
io.inner(i).resp.valid := Bool(false)
|
||||
when(io.outer.resp.bits.tag(log2Up(arbN)-1,0).toUInt === UInt(i)) {
|
||||
io.inner(i).resp.valid := io.outer.resp.valid
|
||||
io.outer.resp.ready := io.inner(i).resp.ready
|
||||
}
|
||||
io.inner(i).resp.bits := io.outer.resp.bits
|
||||
io.inner(i).resp.bits.tag := io.outer.resp.bits.tag >> UInt(log2Up(arbN))
|
||||
}
|
||||
} else { io.inner.head <> io.outer }
|
||||
}
|
||||
|
||||
object MemIOMemPipeIOConverter {
|
||||
def apply(in: MemPipeIO): MemIO = {
|
||||
val out = Wire(new MemIO())
|
||||
in.resp.valid := out.resp.valid
|
||||
in.resp.bits := out.resp.bits
|
||||
out.resp.ready := Bool(true)
|
||||
out.req_cmd.valid := in.req_cmd.valid
|
||||
out.req_cmd.bits := in.req_cmd.bits
|
||||
in.req_cmd.ready := out.req_cmd.ready
|
||||
out.req_data.valid := in.req_data.valid
|
||||
out.req_data.bits := in.req_data.bits
|
||||
in.req_data.ready := out.req_data.ready
|
||||
out
|
||||
}
|
||||
}
|
||||
|
||||
class MemPipeIOMemIOConverter(numRequests: Int) extends MIFModule {
|
||||
val io = new Bundle {
|
||||
val cpu = new MemIO().flip
|
||||
val mem = new MemPipeIO
|
||||
}
|
||||
|
||||
val numEntries = numRequests * mifDataBeats
|
||||
val size = log2Down(numEntries) + 1
|
||||
|
||||
val inc = Wire(Bool())
|
||||
val dec = Wire(Bool())
|
||||
val count = Reg(init=UInt(numEntries, size))
|
||||
val watermark = count >= UInt(mifDataBeats)
|
||||
|
||||
when (inc && !dec) {
|
||||
count := count + UInt(1)
|
||||
}
|
||||
when (!inc && dec) {
|
||||
count := count - UInt(mifDataBeats)
|
||||
}
|
||||
when (inc && dec) {
|
||||
count := count - UInt(mifDataBeats-1)
|
||||
}
|
||||
|
||||
val cmdq_mask = io.cpu.req_cmd.bits.rw || watermark
|
||||
|
||||
io.mem.req_cmd.valid := io.cpu.req_cmd.valid && cmdq_mask
|
||||
io.cpu.req_cmd.ready := io.mem.req_cmd.ready && cmdq_mask
|
||||
io.mem.req_cmd.bits := io.cpu.req_cmd.bits
|
||||
|
||||
io.mem.req_data <> io.cpu.req_data
|
||||
|
||||
// Have separate queues to allow for different mem implementations
|
||||
val resp_data_q = Module((new HellaQueue(numEntries)) { new MemData })
|
||||
resp_data_q.io.enq.valid := io.mem.resp.valid
|
||||
resp_data_q.io.enq.bits.data := io.mem.resp.bits.data
|
||||
|
||||
val resp_tag_q = Module((new HellaQueue(numEntries)) { new MemTag })
|
||||
resp_tag_q.io.enq.valid := io.mem.resp.valid
|
||||
resp_tag_q.io.enq.bits.tag := io.mem.resp.bits.tag
|
||||
|
||||
io.cpu.resp.valid := resp_data_q.io.deq.valid && resp_tag_q.io.deq.valid
|
||||
io.cpu.resp.bits.data := resp_data_q.io.deq.bits.data
|
||||
io.cpu.resp.bits.tag := resp_tag_q.io.deq.bits.tag
|
||||
resp_data_q.io.deq.ready := io.cpu.resp.ready
|
||||
resp_tag_q.io.deq.ready := io.cpu.resp.ready
|
||||
|
||||
inc := resp_data_q.io.deq.fire() && resp_tag_q.io.deq.fire()
|
||||
dec := io.mem.req_cmd.fire() && !io.mem.req_cmd.bits.rw
|
||||
}
|
141
junctions/src/main/scala/nasti.scala
Normal file
141
junctions/src/main/scala/nasti.scala
Normal file
@ -0,0 +1,141 @@
|
||||
// See LICENSE for license details.
|
||||
|
||||
package junctions
|
||||
import Chisel._
|
||||
import scala.math.max
|
||||
|
||||
case object NASTIDataBits extends Field[Int]
|
||||
case object NASTIAddrBits extends Field[Int]
|
||||
case object NASTIIdBits extends Field[Int]
|
||||
|
||||
trait NASTIParameters extends UsesParameters {
|
||||
val nastiXDataBits = params(NASTIDataBits)
|
||||
val nastiWStrobeBits = nastiXDataBits / 8
|
||||
val nastiXAddrBits = params(NASTIAddrBits)
|
||||
val nastiWIdBits = params(NASTIIdBits)
|
||||
val nastiRIdBits = params(NASTIIdBits)
|
||||
val nastiXIdBits = max(nastiWIdBits, nastiRIdBits)
|
||||
val nastiXUserBits = 1
|
||||
val nastiAWUserBits = nastiXUserBits
|
||||
val nastiWUserBits = nastiXUserBits
|
||||
val nastiBUserBits = nastiXUserBits
|
||||
val nastiARUserBits = nastiXUserBits
|
||||
val nastiRUserBits = nastiXUserBits
|
||||
val nastiXLenBits = 8
|
||||
val nastiXSizeBits = 3
|
||||
val nastiXBurstBits = 2
|
||||
val nastiXCacheBits = 4
|
||||
val nastiXProtBits = 3
|
||||
val nastiXQosBits = 4
|
||||
val nastiXRegionBits = 4
|
||||
val nastiXRespBits = 2
|
||||
|
||||
def bytesToXSize(bytes: UInt) = MuxLookup(bytes, UInt("b111"), Array(
|
||||
UInt(1) -> UInt(0),
|
||||
UInt(2) -> UInt(1),
|
||||
UInt(4) -> UInt(2),
|
||||
UInt(8) -> UInt(3),
|
||||
UInt(16) -> UInt(4),
|
||||
UInt(32) -> UInt(5),
|
||||
UInt(64) -> UInt(6),
|
||||
UInt(128) -> UInt(7)))
|
||||
}
|
||||
|
||||
abstract class NASTIBundle extends Bundle with NASTIParameters
|
||||
abstract class NASTIModule extends Module with NASTIParameters
|
||||
|
||||
trait NASTIChannel extends NASTIBundle
|
||||
trait NASTIMasterToSlaveChannel extends NASTIChannel
|
||||
trait NASTISlaveToMasterChannel extends NASTIChannel
|
||||
|
||||
class NASTIMasterIO extends Bundle {
|
||||
val aw = Decoupled(new NASTIWriteAddressChannel)
|
||||
val w = Decoupled(new NASTIWriteDataChannel)
|
||||
val b = Decoupled(new NASTIWriteResponseChannel).flip
|
||||
val ar = Decoupled(new NASTIReadAddressChannel)
|
||||
val r = Decoupled(new NASTIReadDataChannel).flip
|
||||
}
|
||||
|
||||
class NASTISlaveIO extends NASTIMasterIO { flip() }
|
||||
|
||||
trait HasNASTIMetadata extends NASTIBundle {
|
||||
val addr = UInt(width = nastiXAddrBits)
|
||||
val len = UInt(width = nastiXLenBits)
|
||||
val size = UInt(width = nastiXSizeBits)
|
||||
val burst = UInt(width = nastiXBurstBits)
|
||||
val lock = Bool()
|
||||
val cache = UInt(width = nastiXCacheBits)
|
||||
val prot = UInt(width = nastiXProtBits)
|
||||
val qos = UInt(width = nastiXQosBits)
|
||||
val region = UInt(width = nastiXRegionBits)
|
||||
}
|
||||
|
||||
trait HasNASTIData extends NASTIBundle {
|
||||
val data = UInt(width = nastiXDataBits)
|
||||
val last = Bool()
|
||||
}
|
||||
|
||||
class NASTIAddressChannel extends NASTIMasterToSlaveChannel with HasNASTIMetadata
|
||||
|
||||
class NASTIResponseChannel extends NASTISlaveToMasterChannel {
|
||||
val resp = UInt(width = nastiXRespBits)
|
||||
}
|
||||
|
||||
class NASTIWriteAddressChannel extends NASTIAddressChannel {
|
||||
val id = UInt(width = nastiWIdBits)
|
||||
val user = UInt(width = nastiAWUserBits)
|
||||
}
|
||||
|
||||
class NASTIWriteDataChannel extends NASTIMasterToSlaveChannel with HasNASTIData {
|
||||
val strb = UInt(width = nastiWStrobeBits)
|
||||
val user = UInt(width = nastiWUserBits)
|
||||
}
|
||||
|
||||
class NASTIWriteResponseChannel extends NASTIResponseChannel {
|
||||
val id = UInt(width = nastiWIdBits)
|
||||
val user = UInt(width = nastiBUserBits)
|
||||
}
|
||||
|
||||
class NASTIReadAddressChannel extends NASTIAddressChannel {
|
||||
val id = UInt(width = nastiRIdBits)
|
||||
val user = UInt(width = nastiARUserBits)
|
||||
}
|
||||
|
||||
class NASTIReadDataChannel extends NASTIResponseChannel with HasNASTIData {
|
||||
val id = UInt(width = nastiRIdBits)
|
||||
val user = UInt(width = nastiRUserBits)
|
||||
}
|
||||
|
||||
class MemIONASTISlaveIOConverter(cacheBlockOffsetBits: Int) extends MIFModule with NASTIParameters {
|
||||
val io = new Bundle {
|
||||
val nasti = new NASTISlaveIO
|
||||
val mem = new MemIO
|
||||
}
|
||||
|
||||
require(mifDataBits == nastiXDataBits, "Data sizes between LLC and MC don't agree")
|
||||
val (mif_cnt_out, mif_wrap_out) = Counter(io.mem.resp.fire(), mifDataBeats)
|
||||
|
||||
io.mem.req_cmd.bits.addr := Mux(io.nasti.aw.valid, io.nasti.aw.bits.addr, io.nasti.ar.bits.addr) >>
|
||||
UInt(cacheBlockOffsetBits)
|
||||
io.mem.req_cmd.bits.tag := Mux(io.nasti.aw.valid, io.nasti.aw.bits.id, io.nasti.ar.bits.id)
|
||||
io.mem.req_cmd.bits.rw := io.nasti.aw.valid
|
||||
io.mem.req_cmd.valid := (io.nasti.aw.valid && io.nasti.b.ready) || io.nasti.ar.valid
|
||||
io.nasti.ar.ready := io.mem.req_cmd.ready && !io.nasti.aw.valid
|
||||
io.nasti.aw.ready := io.mem.req_cmd.ready && io.nasti.b.ready
|
||||
|
||||
io.nasti.b.valid := io.nasti.aw.valid && io.mem.req_cmd.ready
|
||||
io.nasti.b.bits.id := io.nasti.aw.bits.id
|
||||
io.nasti.b.bits.resp := UInt(0)
|
||||
|
||||
io.nasti.w.ready := io.mem.req_data.ready
|
||||
io.mem.req_data.valid := io.nasti.w.valid
|
||||
io.mem.req_data.bits.data := io.nasti.w.bits.data
|
||||
assert(!io.nasti.w.valid || io.nasti.w.bits.strb.andR, "MemIO must write full cache line")
|
||||
|
||||
io.nasti.r.valid := io.mem.resp.valid
|
||||
io.nasti.r.bits.data := io.mem.resp.bits.data
|
||||
io.nasti.r.bits.last := mif_wrap_out
|
||||
io.nasti.r.bits.id := io.mem.resp.bits.tag
|
||||
io.nasti.r.bits.resp := UInt(0)
|
||||
io.mem.resp.ready := io.nasti.r.ready
|
||||
}
|
1
junctions/src/main/scala/package.scala
Normal file
1
junctions/src/main/scala/package.scala
Normal file
@ -0,0 +1 @@
|
||||
package object junctions extends HASTIConstants with POCIConstants
|
88
junctions/src/main/scala/poci.scala
Normal file
88
junctions/src/main/scala/poci.scala
Normal file
@ -0,0 +1,88 @@
|
||||
package junctions
|
||||
|
||||
import Chisel._
|
||||
|
||||
abstract trait POCIConstants
|
||||
{
|
||||
val SZ_PADDR = 32
|
||||
val SZ_PDATA = 32
|
||||
}
|
||||
|
||||
class POCIIO extends Bundle
|
||||
{
|
||||
val paddr = UInt(OUTPUT, SZ_PADDR)
|
||||
val pwrite = Bool(OUTPUT)
|
||||
val psel = Bool(OUTPUT)
|
||||
val penable = Bool(OUTPUT)
|
||||
val pwdata = UInt(OUTPUT, SZ_PDATA)
|
||||
val prdata = UInt(INPUT, SZ_PDATA)
|
||||
val pready = Bool(INPUT)
|
||||
val pslverr = Bool(INPUT)
|
||||
}
|
||||
|
||||
class HASTItoPOCIBridge extends Module
|
||||
{
|
||||
val io = new Bundle {
|
||||
val in = new HASTISlaveIO
|
||||
val out = new POCIIO
|
||||
}
|
||||
|
||||
val s_idle :: s_setup :: s_access :: Nil = Enum(UInt(), 3)
|
||||
val state = Reg(init = s_idle)
|
||||
val transfer = io.in.hsel & io.in.hreadyin & io.in.htrans(1)
|
||||
|
||||
switch (state) {
|
||||
is (s_idle) {
|
||||
when (transfer) { state := s_setup }
|
||||
}
|
||||
is (s_setup) {
|
||||
state := s_access
|
||||
}
|
||||
is (s_access) {
|
||||
when (io.out.pready & ~transfer) { state := s_idle }
|
||||
when (io.out.pready & transfer) { state := s_setup }
|
||||
when (~io.out.pready) { state := s_access }
|
||||
}
|
||||
}
|
||||
|
||||
val haddr_reg = Reg(UInt(width = SZ_PADDR))
|
||||
val hwrite_reg = Reg(UInt(width = 1))
|
||||
when (transfer) {
|
||||
haddr_reg := io.in.haddr
|
||||
hwrite_reg := io.in.hwrite
|
||||
}
|
||||
|
||||
io.out.paddr := haddr_reg
|
||||
io.out.pwrite := hwrite_reg(0)
|
||||
io.out.psel := (state != s_idle)
|
||||
io.out.penable := (state === s_access)
|
||||
io.out.pwdata := io.in.hwdata
|
||||
io.in.hrdata := io.out.prdata
|
||||
io.in.hreadyout := ((state === s_access) & io.out.pready) | (state === s_idle)
|
||||
io.in.hresp := io.out.pslverr
|
||||
}
|
||||
|
||||
class POCIBus(amap: Seq[UInt=>Bool]) extends Module
|
||||
{
|
||||
val io = new Bundle {
|
||||
val master = new POCIIO().flip
|
||||
val slaves = Vec.fill(amap.size){new POCIIO}
|
||||
}
|
||||
|
||||
val psels = PriorityEncoderOH(
|
||||
(io.slaves zip amap) map { case (s, afn) => {
|
||||
s.paddr := io.master.paddr
|
||||
s.pwrite := io.master.pwrite
|
||||
s.pwdata := io.master.pwdata
|
||||
afn(io.master.paddr) && io.master.psel
|
||||
}})
|
||||
|
||||
(io.slaves zip psels) foreach { case (s, psel) => {
|
||||
s.psel := psel
|
||||
s.penable := io.master.penable && psel
|
||||
} }
|
||||
|
||||
io.master.prdata := Mux1H(psels, io.slaves.map(_.prdata))
|
||||
io.master.pready := Mux1H(psels, io.slaves.map(_.pready))
|
||||
io.master.pslverr := Mux1H(psels, io.slaves.map(_.pslverr))
|
||||
}
|
70
junctions/src/main/scala/slowio.scala
Normal file
70
junctions/src/main/scala/slowio.scala
Normal file
@ -0,0 +1,70 @@
|
||||
// See LICENSE for license details.
|
||||
|
||||
package junctions
|
||||
import Chisel._
|
||||
|
||||
class SlowIO[T <: Data](val divisor_max: Int)(data: => T) extends Module
|
||||
{
|
||||
val io = new Bundle {
|
||||
val out_fast = Decoupled(data).flip
|
||||
val out_slow = Decoupled(data)
|
||||
val in_fast = Decoupled(data)
|
||||
val in_slow = Decoupled(data).flip
|
||||
val clk_slow = Bool(OUTPUT)
|
||||
val set_divisor = Valid(Bits(width = 32)).flip
|
||||
val divisor = Bits(OUTPUT, 32)
|
||||
}
|
||||
|
||||
require(divisor_max >= 8 && divisor_max <= 65536 && isPow2(divisor_max))
|
||||
val divisor = Reg(init=UInt(divisor_max-1))
|
||||
val d_shadow = Reg(init=UInt(divisor_max-1))
|
||||
val hold = Reg(init=UInt(divisor_max/4-1))
|
||||
val h_shadow = Reg(init=UInt(divisor_max/4-1))
|
||||
when (io.set_divisor.valid) {
|
||||
d_shadow := io.set_divisor.bits(log2Up(divisor_max)-1, 0).toUInt
|
||||
h_shadow := io.set_divisor.bits(log2Up(divisor_max)-1+16, 16).toUInt
|
||||
}
|
||||
io.divisor := hold << UInt(16) | divisor
|
||||
|
||||
val count = Reg{UInt(width = log2Up(divisor_max))}
|
||||
val myclock = Reg{Bool()}
|
||||
count := count + UInt(1)
|
||||
|
||||
val rising = count === (divisor >> UInt(1))
|
||||
val falling = count === divisor
|
||||
val held = count === (divisor >> UInt(1)) + hold
|
||||
|
||||
when (falling) {
|
||||
divisor := d_shadow
|
||||
hold := h_shadow
|
||||
count := UInt(0)
|
||||
myclock := Bool(false)
|
||||
}
|
||||
when (rising) {
|
||||
myclock := Bool(true)
|
||||
}
|
||||
|
||||
val in_slow_rdy = Reg(init=Bool(false))
|
||||
val out_slow_val = Reg(init=Bool(false))
|
||||
val out_slow_bits = Reg(data)
|
||||
|
||||
val fromhost_q = Module(new Queue(data,1))
|
||||
fromhost_q.io.enq.valid := rising && (io.in_slow.valid && in_slow_rdy || this.reset)
|
||||
fromhost_q.io.enq.bits := io.in_slow.bits
|
||||
fromhost_q.io.deq <> io.in_fast
|
||||
|
||||
val tohost_q = Module(new Queue(data,1))
|
||||
tohost_q.io.enq <> io.out_fast
|
||||
tohost_q.io.deq.ready := rising && io.out_slow.ready && out_slow_val
|
||||
|
||||
when (held) {
|
||||
in_slow_rdy := fromhost_q.io.enq.ready
|
||||
out_slow_val := tohost_q.io.deq.valid
|
||||
out_slow_bits := Mux(this.reset, fromhost_q.io.deq.bits, tohost_q.io.deq.bits)
|
||||
}
|
||||
|
||||
io.in_slow.ready := in_slow_rdy
|
||||
io.out_slow.valid := out_slow_val
|
||||
io.out_slow.bits := out_slow_bits
|
||||
io.clk_slow := myclock
|
||||
}
|
Loading…
Reference in New Issue
Block a user