rocketchip: match simulated memory width to ExtMem.beatBytes

src/main/scala/groundtest/BusMasterTest.scala

@@ -21,7 +21,7 @@ class ExampleBusMaster(implicit val p: Parameters) extends Module
     with HasTileLinkParameters {
   val mmioParams = p.alterPartial({ case TLId => p(InnerTLId) })
   val memParams = p.alterPartial({ case TLId => p(OuterTLId) })
-  val memStart = p(ExtMemBase)
+  val memStart = p(ExtMem).base
   val memStartBlock = memStart >> p(CacheBlockOffsetBits)
 
   val io = new Bundle {
@@ -70,7 +70,7 @@ class BusMasterTest(implicit p: Parameters) extends GroundTest()(p)
        s_req_check :: s_resp_check :: s_done :: Nil) = Enum(Bits(), 8)
   val state = Reg(init = s_idle)
 
-  val busMasterBlock = p(ExtBusBase) >> p(CacheBlockOffsetBits)
+  val busMasterBlock = p(ExtBus).base >> p(CacheBlockOffsetBits)
   val start_acq = Put(
     client_xact_id = UInt(0),
     addr_block = UInt(busMasterBlock),

src/main/scala/groundtest/Configs.scala

@@ -106,7 +106,7 @@ class WithComparator extends Config(
     case BuildGroundTest =>
       (p: Parameters) => Module(new ComparatorCore()(p))
     case ComparatorKey => ComparatorParameters(
-      targets    = Seq(site(ExtMemBase), testRamAddr),
+      targets    = Seq(site(ExtMem).base, testRamAddr),
       width      = 8,
       operations = 1000,
       atomics    = site(UseAtomics),
@@ -136,7 +136,7 @@ class WithMemtest extends Config(
     }
     case GeneratorKey => TrafficGeneratorParameters(
       maxRequests = 128,
-      startAddress = BigInt(site(ExtMemBase)))
+      startAddress = BigInt(site(ExtMem).base))
     case BuildGroundTest =>
       (p: Parameters) => Module(new GeneratorTest()(p))
     case _ => throw new CDEMatchError

src/main/scala/groundtest/Regression.scala

@@ -20,7 +20,7 @@ class RegressionIO(implicit val p: Parameters) extends ParameterizedBundle()(p)
 
 abstract class Regression(implicit val p: Parameters)
     extends Module with HasTileLinkParameters with HasAddrMapParameters {
-  val memStart = p(ExtMemBase)
+  val memStart = p(ExtMem).base
   val memStartBlock = memStart >> p(CacheBlockOffsetBits)
   val io = new RegressionIO
 

src/main/scala/groundtest/TestHarness.scala

@@ -16,15 +16,10 @@ class TestHarness(q: Parameters) extends Module {
   io.success := dut.io.success
 
   if (dut.io.mem_axi4.nonEmpty) {
-    val memSize = p(ExtMemSize)
+    val memSize = p(ExtMem).size
     require(memSize % dut.io.mem_axi4.size == 0)
-    for (axi <- dut.io.mem_axi4.map(_(0))) {
+    for (axi <- dut.io.mem_axi4) {
-      val mem = Module(new SimAXIMem(memSize / dut.io.mem_axi4.size))
+      Module(LazyModule(new SimAXIMem(memSize / dut.io.mem_axi4.size)).module).io.axi <> axi
-      mem.io.axi.ar <> axi.ar
-      mem.io.axi.aw <> axi.aw
-      mem.io.axi.w  <> axi.w
-      axi.r <> LatencyPipe(mem.io.axi.r, p(SimMemLatency))
-      axi.b <> LatencyPipe(mem.io.axi.b, p(SimMemLatency))
     }
   }
 }

src/main/scala/groundtest/Tile.scala

@@ -5,7 +5,7 @@ import rocket._
 import uncore.tilelink._
 import uncore.agents.CacheName
 import uncore.tilelink2._
-import rocketchip.ExtMemBase
+import rocketchip.ExtMem
 import diplomacy._
 import scala.util.Random
 import scala.collection.mutable.ListBuffer
@@ -30,7 +30,7 @@ trait HasGroundTestParameters {
   val nUncached = tileSettings.uncached
   val nCached = tileSettings.cached
   val nPTW = tileSettings.ptw
-  val memStart = p(ExtMemBase)
+  val memStart = p(ExtMem).base
   val memStartBlock = memStart >> p(CacheBlockOffsetBits)
 }
 

src/main/scala/rocketchip/Configs.scala

@@ -23,16 +23,8 @@ class BasePlatformConfig extends Config(
     (pname,site,here) =>  {
       type PF = PartialFunction[Any,Any]
       def findBy(sname:Any):Any = here[PF](site[Any](sname))(pname)
-      lazy val edgeDataBits = site(EdgeDataBits)
-      lazy val edgeDataBeats = (8 * site(CacheBlockBytes)) / edgeDataBits
       pname match {
         //Memory Parameters
-        case EdgeDataBits => 64
-        case EdgeIDBits => 5
-        case NastiKey => NastiParameters(
-          dataBits = edgeDataBits,
-          addrBits = site(PAddrBits),
-          idBits = site(EdgeIDBits))
         case TLEmitMonitors => true
         case NExtTopInterrupts => 2
         case SOCBusConfig => site(L1toL2Config)
@@ -40,23 +32,10 @@ class BasePlatformConfig extends Config(
         case PeripheryBusArithmetic => true
         // Note that PLIC asserts that this is > 0.
         case IncludeJtagDTM => false
-        case NExtBusAXIChannels => 0
-        case HastiId => "Ext"
-        case HastiKey("TL") =>
-          HastiParameters(
-            addrBits = site(PAddrBits),
-            dataBits = site(TLKey(site(TLId))).dataBits / site(TLKey(site(TLId))).dataBeats)
-        case HastiKey("Ext") =>
-          HastiParameters(
-            addrBits = site(PAddrBits),
-            dataBits = edgeDataBits)
         case NMemoryChannels => Dump("N_MEM_CHANNELS", 1)
-        case ExtMemBase => Dump("MEM_BASE", 0x80000000L)
+        case ExtMem => AXIMasterConfig(0x80000000L, 0x10000000L, 8, 4)
-        case ExtMemSize => Dump("MEM_SIZE", 0x10000000L)
+        case ExtBus => AXIMasterConfig(0x60000000L, 0x20000000L, 8, 4)
-        case ExtBusBase => 0x60000000L
-        case ExtBusSize => 0x20000000L
         case RTCPeriod => 100 // gives 10 MHz RTC assuming 1 GHz uncore clock
-        case SimMemLatency => 0
         case _ => throw new CDEMatchError
       }
     }
@@ -91,7 +70,7 @@ class WithNMemoryChannels(n: Int) extends Config(
 
 class WithExtMemSize(n: Long) extends Config(
   (pname,site,here) => pname match {
-    case ExtMemSize => Dump("MEM_SIZE", n)
+    case ExtMem => site(ExtMem).copy(size = n)
     case _ => throw new CDEMatchError
   }
 )
@@ -122,7 +101,7 @@ class RoccExampleConfig extends Config(new WithRoccExample ++ new BaseConfig)
 
 class WithEdgeDataBits(dataBits: Int) extends Config(
   (pname, site, here) => pname match {
-    case EdgeDataBits => dataBits
+    case ExtMem => site(ExtMem).copy(beatBytes = dataBits/8)
     case _ => throw new CDEMatchError
   })
 

src/main/scala/rocketchip/Periphery.scala

@@ -19,13 +19,10 @@ import rocket.XLen
 import scala.math.max
 import coreplex._
 
-/** External Bus controls */
-case object NExtBusAXIChannels extends Field[Int]
 /** Specifies the size of external memory */
-case object ExtMemSize extends Field[Long]
+case class AXIMasterConfig(base: Long, size: Long, beatBytes: Int, idBits: Int)
-case object ExtMemBase extends Field[Long]
+case object ExtMem extends Field[AXIMasterConfig]
-case object ExtBusSize extends Field[Long]
+case object ExtBus extends Field[AXIMasterConfig]
-case object ExtBusBase extends Field[Long]
 /** Specifies the number of external interrupts */
 case object NExtTopInterrupts extends Field[Int]
 /** Source of RTC. First bundle is TopIO.extra, Second bundle is periphery.io.extra  **/
@@ -36,10 +33,6 @@ case object PeripheryBusArithmetic extends Field[Boolean]
 /* Specifies the SOC-bus configuration */
 case object SOCBusConfig extends Field[TLBusConfig]
 
-/* Specifies the data and id width at the chip boundary */
-case object EdgeDataBits extends Field[Int]
-case object EdgeIDBits extends Field[Int]
-
 /** Utility trait for quick access to some relevant parameters */
 trait HasPeripheryParameters {
   implicit val p: Parameters
@@ -81,13 +74,12 @@ trait PeripheryExtInterruptsModule {
 trait PeripheryMasterAXI4Mem {
   this: BaseTop[BaseCoreplex] with TopNetwork =>
 
-  val base = p(ExtMemBase)
+  private val config = p(ExtMem)
-  val size = p(ExtMemSize)
+  private val channels = coreplexMem.size
-  val channels = coreplexMem.size
 
   val mem_axi4 = coreplexMem.zipWithIndex.map { case (node, i) =>
-    val c_size = size/channels
+    val c_size = config.size/channels
-    val c_base = base + c_size*i
+    val c_base = config.base + c_size*i
 
     val axi4 = AXI4BlindOutputNode(AXI4SlavePortParameters(
       slaves = Seq(AXI4SlaveParameters(
@@ -97,11 +89,11 @@ trait PeripheryMasterAXI4Mem {
         supportsWrite = TransferSizes(1, 256), // The slave supports 1-256 byte transfers
         supportsRead  = TransferSizes(1, 256),
         interleavedId = Some(0))),             // slave does not interleave read responses
-      beatBytes = 8)) // 64-bit AXI interface
+      beatBytes = config.beatBytes))
 
     axi4 :=
       // AXI4Fragmenter(lite=false, maxInFlight = 20)( // beef device up to support awlen = 0xff
-      TLToAXI4(idBits = 4)(                     // use idBits = 0 for AXI4-Lite
+      TLToAXI4(idBits = config.idBits)(         // use idBits = 0 for AXI4-Lite
       TLWidthWidget(coreplex.l1tol2_beatBytes)( // convert width before attaching to the l1tol2
       node))
 
@@ -129,18 +121,19 @@ trait PeripheryMasterAXI4MemModule {
 trait PeripheryMasterAXI4MMIO {
   this: TopNetwork =>
 
+  private val config = p(ExtBus)
   val mmio_axi4 = AXI4BlindOutputNode(AXI4SlavePortParameters(
     slaves = Seq(AXI4SlaveParameters(
-      address       = List(AddressSet(BigInt(p(ExtBusBase)), p(ExtBusSize)-1)),
+      address       = List(AddressSet(BigInt(config.base), config.size-1)),
       executable    = true,                  // Can we run programs on this memory?
       supportsWrite = TransferSizes(1, 256), // The slave supports 1-256 byte transfers
       supportsRead  = TransferSizes(1, 256),
       interleavedId = Some(0))),             // slave does not interleave read responses
-    beatBytes = 8)) // 64-bit AXI interface
+    beatBytes = config.beatBytes))
 
   mmio_axi4 :=
     // AXI4Fragmenter(lite=false, maxInFlight = 20)( // beef device up to support awlen = 0xff
-    TLToAXI4(idBits = 4)(                  // use idBits = 0 for AXI4-Lite
+    TLToAXI4(idBits = config.idBits)(      // use idBits = 0 for AXI4-Lite
     TLWidthWidget(socBusConfig.beatBytes)( // convert width before attaching to socBus
     socBus.node))
 }

src/main/scala/rocketchip/TestHarness.scala

@@ -7,11 +7,9 @@ import cde.{Parameters, Field}
 import junctions._
 import diplomacy._
 import coreplex._
-import junctions.NastiConstants._
+import uncore.axi4._
-import util.LatencyPipe
 
 case object BuildExampleTop extends Field[Parameters => ExampleTop[coreplex.BaseCoreplex]]
-case object SimMemLatency extends Field[Int]
 
 class TestHarness(q: Parameters) extends Module {
   val io = new Bundle {
@@ -24,79 +22,31 @@ class TestHarness(q: Parameters) extends Module {
     int := Bool(false)
 
   if (dut.io.mem_axi4.nonEmpty) {
-    val memSize = p(ExtMemSize)
+    val memSize = p(ExtMem).size
     require(memSize % dut.io.mem_axi4.size == 0)
-    for (axi <- dut.io.mem_axi4.map(_(0))) {
+    for (axi <- dut.io.mem_axi4) {
-      val mem = Module(new SimAXIMem(memSize / dut.io.mem_axi4.size))
+      Module(LazyModule(new SimAXIMem(memSize / dut.io.mem_axi4.size)).module).io.axi <> axi
-      mem.io.axi.ar <> axi.ar
-      mem.io.axi.aw <> axi.aw
-      mem.io.axi.w  <> axi.w
-      axi.r <> LatencyPipe(mem.io.axi.r, p(SimMemLatency))
-      axi.b <> LatencyPipe(mem.io.axi.b, p(SimMemLatency))
     }
   }
 
   val dtm = Module(new SimDTM).connect(clock, reset, dut.io.debug, io.success)
 
-  for (mmio_axi <- dut.io.mmio_axi) {
+  val mmio_sim = Module(LazyModule(new SimAXIMem(4096)).module)
-    val slave = Module(new NastiErrorSlave)
+  mmio_sim.io.axi <> dut.io.mmio_axi
-    slave.io <> mmio_axi
 }
 
-}
+class SimAXIMem(size: BigInt)(implicit p: Parameters) extends LazyModule {
+  val config = p(ExtMem)
 
-class SimAXIMem(size: BigInt)(implicit p: Parameters) extends NastiModule()(p) {
+  val node = AXI4BlindInputNode(AXI4MasterPortParameters(Seq(AXI4MasterParameters(IdRange(0, 1 << config.idBits)))))
+  val sram = LazyModule(new AXI4RAM(AddressSet(0, size-1), beatBytes = config.beatBytes))
+  sram.node := AXI4Buffer()(AXI4Fragmenter(maxInFlight = 4)(node))
+
+  lazy val module = new LazyModuleImp(this) {
     val io = new Bundle {
-    val axi = new NastiIO().flip
+      val axi = node.bundleIn
     }
-
-  val rValid = Reg(init = Bool(false))
-  val ar = RegEnable(io.axi.ar.bits, io.axi.ar.fire())
-  io.axi.ar.ready := !rValid
-  when (io.axi.ar.fire()) { rValid := Bool(true) }
-  when (io.axi.r.fire()) {
-    assert(ar.burst === NastiConstants.BURST_INCR)
-    ar.addr := ar.addr + (UInt(1) << ar.size)
-    ar.len := ar.len - UInt(1)
-    when (ar.len === UInt(0)) { rValid := Bool(false) }
   }
-
-  val w = io.axi.w.bits
-  require((size * 8) % nastiXDataBits == 0)
-  val depth = (size * 8) / nastiXDataBits
-  val mem = Mem(depth.toInt, w.data)
-
-  val wValid = Reg(init = Bool(false))
-  val bValid = Reg(init = Bool(false))
-  val aw = RegEnable(io.axi.aw.bits, io.axi.aw.fire())
-  io.axi.aw.ready := !wValid && !bValid
-  io.axi.w.ready := wValid
-  when (io.axi.b.fire()) { bValid := Bool(false) }
-  when (io.axi.aw.fire()) { wValid := Bool(true) }
-  when (io.axi.w.fire()) {
-    assert(aw.burst === NastiConstants.BURST_INCR)
-    aw.addr := aw.addr + (UInt(1) << aw.size)
-    aw.len := aw.len - UInt(1)
-    when (aw.len === UInt(0)) {
-      wValid := Bool(false)
-      bValid := Bool(true)
-    }
-
-    def row = mem((aw.addr >> log2Ceil(nastiXDataBits/8))(log2Ceil(depth)-1, 0))
-    val mask = FillInterleaved(8, w.strb)
-    val newData = mask & w.data | ~mask & row
-    row := newData
-  }
-
-  io.axi.b.valid := bValid
-  io.axi.b.bits.id := aw.id
-  io.axi.b.bits.resp := RESP_OKAY
-
-  io.axi.r.valid := rValid
-  io.axi.r.bits.id := ar.id
-  io.axi.r.bits.data := mem((ar.addr >> log2Ceil(nastiXDataBits/8))(log2Ceil(depth)-1, 0))
-  io.axi.r.bits.resp := RESP_OKAY
-  io.axi.r.bits.last := ar.len === UInt(0)
 }
 
 class SimDTM(implicit p: Parameters) extends BlackBox {