Merge pull request #595 from ucb-bar/ignore-tl-c

Ignore TL-C

src/main/scala/rocket/ICache.scala

@@ -156,6 +156,7 @@ class ICacheModule(outer: ICache) extends LazyModuleImp(outer)
                     fromSource = UInt(0),
                     toAddress = (refill_addr >> blockOffBits) << blockOffBits,
                     lgSize = lgCacheBlockBytes)._2
+  tl_out.b.ready := Bool(true)
   tl_out.c.valid := Bool(false)
   tl_out.e.valid := Bool(false)
 

src/main/scala/uncore/tilelink2/Monitor.scala

@@ -295,10 +295,16 @@ class TLMonitor(args: TLMonitorArgs) extends TLMonitorBase(args)
 
   def legalizeFormat(bundle: TLBundleSnoop, edge: TLEdge)(implicit sourceInfo: SourceInfo) = {
     when (bundle.a.valid) { legalizeFormatA(bundle.a.bits, edge) }
-    when (bundle.b.valid) { legalizeFormatB(bundle.b.bits, edge) }
-    when (bundle.c.valid) { legalizeFormatC(bundle.c.bits, edge) }
     when (bundle.d.valid) { legalizeFormatD(bundle.d.bits, edge) }
-    when (bundle.e.valid) { legalizeFormatE(bundle.e.bits, edge) }
+    if (edge.client.anySupportProbe && edge.manager.anySupportAcquireB) {
+      when (bundle.b.valid) { legalizeFormatB(bundle.b.bits, edge) }
+      when (bundle.c.valid) { legalizeFormatC(bundle.c.bits, edge) }
+      when (bundle.e.valid) { legalizeFormatE(bundle.e.bits, edge) }
+    } else {
+      assert (!bundle.b.valid, "'B' channel valid and not TL-C" + extra)
+      assert (!bundle.c.valid, "'C' channel valid and not TL-C" + extra)
+      assert (!bundle.e.valid, "'E' channel valid and not TL-C" + extra)
+    }
   }
 
   def legalizeMultibeatA(a: DecoupledSnoop[TLBundleA], edge: TLEdge)(implicit sourceInfo: SourceInfo) {
@@ -398,9 +404,11 @@ class TLMonitor(args: TLMonitorArgs) extends TLMonitorBase(args)
 
   def legalizeMultibeat(bundle: TLBundleSnoop, edge: TLEdge)(implicit sourceInfo: SourceInfo) {
     legalizeMultibeatA(bundle.a, edge)
-    legalizeMultibeatB(bundle.b, edge)
-    legalizeMultibeatC(bundle.c, edge)
     legalizeMultibeatD(bundle.d, edge)
+    if (edge.client.anySupportProbe && edge.manager.anySupportAcquireB) {
+      legalizeMultibeatB(bundle.b, edge)
+      legalizeMultibeatC(bundle.c, edge)
+    }
   }
 
   def legalizeSourceUnique(bundle: TLBundleSnoop, edge: TLEdge)(implicit sourceInfo: SourceInfo) {

src/main/scala/uncore/tilelink2/Xbar.scala

@@ -103,24 +103,50 @@ class TLXbar(policy: TLArbiter.Policy = TLArbiter.lowestIndexFirst)(implicit p:
     val in = Wire(Vec(io.in.size, TLBundle(wide_bundle)))
     for (i <- 0 until in.size) {
       val r = inputIdRanges(i)
-      in(i) <> io.in(i)
+
-      // prefix sources
+      in(i).a <> io.in(i).a
+      io.in(i).d <> in(i).d
       in(i).a.bits.source := io.in(i).a.bits.source | UInt(r.start)
-      in(i).c.bits.source := io.in(i).c.bits.source | UInt(r.start)
-      // defix sources
-      io.in(i).b.bits.source := trim(in(i).b.bits.source, r.size)
       io.in(i).d.bits.source := trim(in(i).d.bits.source, r.size)
+
+      if (node.edgesIn(i).client.anySupportProbe && node.edgesOut.exists(_.manager.anySupportAcquireB)) {
+        in(i).c <> io.in(i).c
+        in(i).e <> io.in(i).e
+        io.in(i).b <> in(i).b
+        in(i).c.bits.source := io.in(i).c.bits.source | UInt(r.start)
+        io.in(i).b.bits.source := trim(in(i).b.bits.source, r.size)
+      } else {
+        in(i).c.valid := Bool(false)
+        in(i).e.valid := Bool(false)
+        in(i).b.ready := Bool(false)
+        io.in(i).c.ready := Bool(true)
+        io.in(i).e.ready := Bool(true)
+        io.in(i).b.valid := Bool(false)
+      }
     }
 
     // Transform output bundle sinks (sources use global namespace on both sides)
     val out = Wire(Vec(io.out.size, TLBundle(wide_bundle)))
     for (i <- 0 until out.size) {
       val r = outputIdRanges(i)
-      io.out(i) <> out(i)
+
-      // prefix sinks
+      io.out(i).a <> out(i).a
+      out(i).d <> io.out(i).d
       out(i).d.bits.sink := io.out(i).d.bits.sink | UInt(r.start)
-      // defix sinks
+
-      io.out(i).e.bits.sink := trim(out(i).e.bits.sink, r.size)
+      if (node.edgesOut(i).manager.anySupportAcquireB && node.edgesIn.exists(_.client.anySupportProbe)) {
+        io.out(i).c <> out(i).c
+        io.out(i).e <> out(i).e
+        out(i).b <> io.out(i).b
+        io.out(i).e.bits.sink := trim(out(i).e.bits.sink, r.size)
+      } else {
+        out(i).c.ready := Bool(false)
+        out(i).e.ready := Bool(false)
+        out(i).b.valid := Bool(false)
+        io.out(i).c.valid := Bool(false)
+        io.out(i).e.valid := Bool(false)
+        io.out(i).b.ready := Bool(true)
+      }
     }
 
     val addressA = (in zip node.edgesIn) map { case (i, e) => e.address(i.a.bits) }