fixing bufferless broadcast hub

regression/Makefile

@@ -44,13 +44,14 @@ $(error Set SUITE to the regression suite you want to run)
 endif
 
 ifeq ($(SUITE),RocketSuite)
-CONFIGS=DefaultConfig DefaultL2Config RoccExampleConfig SplitL2MetadataTestConfig
+CONFIGS=DefaultConfig DefaultL2Config DefaultBufferlessConfig RoccExampleConfig
 endif
 
 ifeq ($(SUITE),GroundtestSuite)
-CONFIGS=MemtestConfig FancyMemtestConfig \
-	BroadcastRegressionTestConfig CacheRegressionTestConfig \
-	ComparatorConfig ComparatorL2Config UnitTestConfig
+CONFIGS=MemtestConfig MemtestBufferlessConfig FancyMemtestConfig \
+	BroadcastRegressionTestConfig BufferlessRegressionTestConfig CacheRegressionTestConfig \
+	ComparatorConfig ComparatorBufferlessConfig ComparatorL2Config \
+	UnitTestConfig
 endif
 
 # These are the named regression targets.  While it's expected you run them in

src/main/scala/Configs.scala

@@ -366,6 +366,14 @@ class WithL2Cache extends Config(
   knobValues = { case "L2_WAYS" => 8; case "L2_CAPACITY_IN_KB" => 2048; case "L2_SPLIT_METADATA" => false; case _ => throw new CDEMatchError }
 )
 
+class WithBufferlessBroadcastHub extends Config(
+  (pname, site, here) => pname match {
+    case BuildL2CoherenceManager => (id: Int, p: Parameters) =>
+      Module(new BufferlessBroadcastHub()(p.alterPartial({
+        case InnerTLId => "L1toL2"
+        case OuterTLId => "L2toMC" })))
+  })
+
 class WithPLRU extends Config(
   (pname, site, here) => pname match {
     case L2Replacer => () => new SeqPLRU(site(NSets), site(NWays))
@@ -388,6 +396,9 @@ class DefaultL2Config extends Config(new WithL2Cache ++ new BaseConfig)
 class DefaultL2FPGAConfig extends Config(
   new WithL2Capacity(64) ++ new WithL2Cache ++ new DefaultFPGAConfig)
 
+class DefaultBufferlessConfig extends Config(
+  new WithBufferlessBroadcastHub ++ new BaseConfig)
+
 class PLRUL2Config extends Config(new WithPLRU ++ new DefaultL2Config)
 
 class WithRV32 extends Config(

src/main/scala/TestConfigs.scala

@@ -195,14 +195,20 @@ class ComparatorConfig extends Config(new WithComparator ++ new GroundTestConfig
 class ComparatorL2Config extends Config(
   new WithAtomics ++ new WithPrefetches ++
   new WithL2Cache ++ new ComparatorConfig)
+class ComparatorBufferlessConfig extends Config(
+  new WithBufferlessBroadcastHub ++ new ComparatorConfig)
 class GroundTestConfig extends Config(new WithGroundTest ++ new BaseConfig)
 class MemtestConfig extends Config(new WithMemtest ++ new GroundTestConfig)
 class MemtestL2Config extends Config(
   new WithMemtest ++ new WithL2Cache ++ new GroundTestConfig)
+class MemtestBufferlessConfig extends Config(
+  new WithMemtest ++ new WithBufferlessBroadcastHub ++ new GroundTestConfig)
 class CacheFillTestConfig extends Config(
   new WithCacheFillTest ++ new WithPLRU ++ new WithL2Cache ++ new GroundTestConfig)
 class BroadcastRegressionTestConfig extends Config(
   new WithBroadcastRegressionTest ++ new GroundTestConfig)
+class BufferlessRegressionTestConfig extends Config(
+  new WithBufferlessBroadcastHub ++ new BroadcastRegressionTestConfig)
 class CacheRegressionTestConfig extends Config(
   new WithCacheRegressionTest ++ new WithL2Cache ++ new GroundTestConfig)
 class DmaTestConfig extends Config(new WithDmaTest ++ new WithL2Cache ++ new GroundTestConfig)
@@ -223,11 +229,12 @@ class WithNUncachedGenerators(n: Int) extends Config(
     case _ => throw new CDEMatchError
   })
 
+// Test ALL the things
 class FancyMemtestConfig extends Config(
   new WithNCachedGenerators(1) ++ new WithNUncachedGenerators(2) ++
-  new WithNCores(2) ++
+  new WithNCores(2) ++ new WithMemtest ++
   new WithNMemoryChannels(2) ++ new WithNBanksPerMemChannel(4) ++
-  new WithMemtest ++ new WithL2Cache ++ new GroundTestConfig)
+  new WithSplitL2Metadata ++ new WithL2Cache ++ new GroundTestConfig)
 
 class MIF128BitComparatorConfig extends Config(
   new WithMIFDataBits(128) ++ new ComparatorConfig)