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SpinalHDL-lib
There is a newer version: 1.10.2a
package spinal.lib.bus.amba4.axi

import spinal.core._
import spinal.lib._
import spinal.lib.bus.amba4.axis.Axi4Stream.Axi4StreamBundle
import spinal.lib.bus.bsb.{Bsb, BsbTransaction}



object Axi4ToAxi4Shared{
  def apply(axi : Axi4): Axi4Shared ={
    val axiShared = new Axi4Shared(axi.config)
    val arbiter = StreamArbiterFactory().roundRobin.build(new Axi4Ax(axi.config, axi.config.arwUserWidth),2)
    arbiter.io.inputs(0) << axi.ar.asInstanceOf[Stream[Axi4Ax]]
    arbiter.io.inputs(1) << axi.aw.asInstanceOf[Stream[Axi4Ax]]

    axiShared.arw.arbitrationFrom(arbiter.io.output)
    axiShared.arw.payload.assignSomeByName(arbiter.io.output.payload)
    axiShared.arw.write := arbiter.io.chosenOH(1)
    axi.w >> axiShared.w
    axi.b << axiShared.b
    axi.r << axiShared.r
    axiShared
  }

  def main(args: Array[String]) {
    SpinalVhdl(new Component{
      val axi = slave(Axi4(Axi4Config(32,32,2)))
      val axiShared = master(Axi4ToAxi4Shared(axi))
    })
  }
}

object  Axi4SpecRenamer{
  def apply[T <: Bundle with Axi4Bus](that : T): T ={
    def doIt = {
      that.flatten.foreach((bt) => {
        bt.setName(bt.getName().replace("_payload_",""))
        bt.setName(bt.getName().replace("_valid","valid"))
        bt.setName(bt.getName().replace("_ready","ready"))
        if(bt.getName().startsWith("io_")) bt.setName(bt.getName().replaceFirst("io_",""))
      })
    }
    if(Component.current == that.component)
      that.component.addPrePopTask(() => {doIt})
    else
      doIt

    that
  }

  def apply[T <: Data](that : Stream[T]): Stream[T] = {
    that.payload match {
      case bsb: BsbTransaction => {
        def doIt = {
          bsb.data.overrideLocalName("tdata")
          bsb.mask.overrideLocalName("tkeep")
          bsb.source.overrideLocalName("tid")
          bsb.sink.overrideLocalName("tdest")
          bsb.last.overrideLocalName("tlast")
          that.flatten.foreach((bt) => {
            bt.setName(bt.getName().replace("payload_",""))
            bt.setName(bt.getName().replace("valid","tvalid"))
            bt.setName(bt.getName().replace("ready","tready"))
            if(bt.getName().startsWith("io_")) bt.setName(bt.getName().replaceFirst("io_",""))
          })
        }
        if(Component.current == that.component)
          that.component.addPrePopTask(() => {doIt})
        else
          doIt
      }
      case axis: Axi4StreamBundle => {
        def doIt = {
          axis.data.overrideLocalName("tdata")
          (axis.id != null)    generate axis.id.overrideLocalName("tid")
          (axis.strb != null)  generate axis.strb.overrideLocalName("tstrb")
          (axis.keep != null)  generate axis.keep.overrideLocalName("tkeep")
          (axis.last != null)  generate axis.last.overrideLocalName("tlast")
          (axis.dest != null)  generate axis.dest.overrideLocalName("tdest")
          (axis.user != null)  generate axis.user.overrideLocalName("tuser")
          that.flatten.foreach((bt) => {
            bt.setName(bt.getName().replace("payload_", ""))
            bt.setName(bt.getName().replace("valid", "tvalid"))
            bt.setName(bt.getName().replace("ready", "tready"))
            if(bt.getName().startsWith("io_")) bt.setName(bt.getName().replaceFirst("io_",""))
          })
        }
        if(Component.current == that.component)
          that.component.addPrePopTask(() => {doIt})
        else
          doIt
      }
    }

    that
  }

  def main(args: Array[String]) {
    SpinalVhdl(new Component{
      val c = Axi4Config(32,32,4)
      val masters = new Bundle{
        def setup[T <: Bundle with IMasterSlave with Axi4Bus](that : T) = Axi4SpecRenamer(master(that))
        val rw = setup(Axi4(c))
        val ro = setup(Axi4ReadOnly(c))
        val wo = setup(Axi4WriteOnly(c))
        val srw = setup(Axi4Shared(c))
      }
      val slaves = new Bundle{
        def setup[T <: Bundle with IMasterSlave with Axi4Bus](that : T) = Axi4SpecRenamer(slave(that))
        val rw = setup(Axi4(c))
        val ro = setup(Axi4ReadOnly(c))
        val wo = setup(Axi4WriteOnly(c))
        val srw = setup(Axi4Shared(c))
      }

      masters.rw <> slaves.rw
      masters.ro <> slaves.ro
      masters.wo <> slaves.wo
      masters.srw <> slaves.srw

    }.setDefinitionName("TopLevel"))
  }
}