diff --git a/project/plugins.sbt b/project/plugins.sbt
index 1ea11ab6..c0abe1e6 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -4,8 +4,10 @@ addSbtPlugin("com.typesafe.sbt" % "sbt-ghpages" % "0.5.3")
 
 addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "0.8.1")
 
-addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.6.1")
+addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "0.7.0")
 
 addSbtPlugin("org.xerial.sbt" % "sbt-pack" % "0.8.0")
 
 addSbtPlugin("com.eed3si9n" % "sbt-unidoc" % "0.3.3")
+
+addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.5.1")
diff --git a/src/main/scala/coreplex/Configs.scala b/src/main/scala/coreplex/Configs.scala
index 46865cde..e4560811 100644
--- a/src/main/scala/coreplex/Configs.scala
+++ b/src/main/scala/coreplex/Configs.scala
@@ -151,10 +151,12 @@ class WithBufferlessBroadcastHub extends Config((site, here, up) => {
  * DO NOT use this configuration.
  */
 class WithStatelessBridge extends Config((site, here, up) => {
-  case BankedL2Key => up(BankedL2Key, site).copy(coherenceManager = { case (q, _) =>
-    implicit val p = q
+  case BankedL2Key => up(BankedL2Key, site).copy(coherenceManager = { coreplex =>
+    implicit val p = coreplex.p
     val cork = LazyModule(new TLCacheCork(unsafe = true))
-    (cork.node, cork.node)
+    val ww = LazyModule(new TLWidthWidget(coreplex.sbusBeatBytes))
+    ww.node :*= cork.node
+    (cork.node, ww.node, () => None)
   })
 })
 
diff --git a/src/main/scala/coreplex/MemoryBus.scala b/src/main/scala/coreplex/MemoryBus.scala
index 4127426a..908194ee 100644
--- a/src/main/scala/coreplex/MemoryBus.scala
+++ b/src/main/scala/coreplex/MemoryBus.scala
@@ -22,12 +22,13 @@ case object BroadcastKey extends Field(BroadcastParams())
 case class BankedL2Params(
   nMemoryChannels:  Int = 1,
   nBanksPerChannel: Int = 1,
-  coherenceManager: (Parameters, HasMemoryBus) => (TLInwardNode, TLOutwardNode) = { case (q, _) =>
-    implicit val p = q
-    val MemoryBusParams(_, blockBytes, _, _) = p(MemoryBusKey)
+  coherenceManager: HasMemoryBus => (TLInwardNode, TLOutwardNode, () => Option[Bool]) = { coreplex =>
+    implicit val p = coreplex.p
     val BroadcastParams(nTrackers, bufferless) = p(BroadcastKey)
-    val bh = LazyModule(new TLBroadcast(blockBytes, nTrackers, bufferless))
-    (bh.node, bh.node)
+    val bh = LazyModule(new TLBroadcast(coreplex.memBusBlockBytes, nTrackers, bufferless))
+    val ww = LazyModule(new TLWidthWidget(coreplex.sbusBeatBytes))
+    ww.node :*= bh.node
+    (bh.node, ww.node, () => None)
   }) {
   val nBanks = nMemoryChannels*nBanksPerChannel
 }
@@ -53,24 +54,25 @@ class MemoryBus(params: MemoryBusParams)(implicit p: Parameters) extends TLBusWr
 
 trait HasMemoryBus extends HasSystemBus with HasPeripheryBus with HasInterruptBus {
   private val mbusParams = p(MemoryBusKey)
-  private val MemoryBusParams(beatBytes, blockBytes, _, _) = mbusParams
   private val l2Params = p(BankedL2Key)
+  val MemoryBusParams(memBusBeatBytes, memBusBlockBytes, _, _) = mbusParams
   val BankedL2Params(nMemoryChannels, nBanksPerChannel, coherenceManager) = l2Params
   val nBanks = l2Params.nBanks
-  val cacheBlockBytes = blockBytes
+  val cacheBlockBytes = memBusBlockBytes
+  private val (in, out, halt) = coherenceManager(this)
+  def memBusCanCauseHalt: () => Option[Bool] = halt
 
   require (isPow2(nMemoryChannels) || nMemoryChannels == 0)
   require (isPow2(nBanksPerChannel))
-  require (isPow2(blockBytes))
+  require (isPow2(memBusBlockBytes))
 
-  private val (in, out) = coherenceManager(p, this)
-  private val mask = ~BigInt((nBanks-1) * blockBytes)
+  private val mask = ~BigInt((nBanks-1) * memBusBlockBytes)
   val memBuses = Seq.tabulate(nMemoryChannels) { channel =>
     val mbus = new MemoryBus(mbusParams)
     for (bank <- 0 until nBanksPerChannel) {
       val offset = (bank * nMemoryChannels) + channel
       ForceFanout(a = true) { implicit p => in := sbus.toMemoryBus }
-      mbus.fromCoherenceManager := TLFilter(TLFilter.Mmask(AddressSet(offset * blockBytes, mask)))(out)
+      mbus.fromCoherenceManager := TLFilter(TLFilter.Mmask(AddressSet(offset * memBusBlockBytes, mask)))(out)
     }
     mbus
   }
diff --git a/src/main/scala/coreplex/RocketCoreplex.scala b/src/main/scala/coreplex/RocketCoreplex.scala
index 6bac3fd4..52c84473 100644
--- a/src/main/scala/coreplex/RocketCoreplex.scala
+++ b/src/main/scala/coreplex/RocketCoreplex.scala
@@ -84,7 +84,11 @@ trait HasRocketTiles extends HasSystemBus
     lip.foreach { coreIntXbar.intnode := _ }                // lip
     wrapper.coreIntNode   := coreIntXbar.intnode
 
-    wrapper.intOutputNode.foreach { plic.intnode := _ }
+    wrapper.intOutputNode.foreach { case int =>
+      val rocketIntXing = LazyModule(new IntXing(wrapper.outputInterruptXingLatency))
+      rocketIntXing.intnode := int
+      plic.intnode := rocketIntXing.intnode
+    }
 
     wrapper
   }
diff --git a/src/main/scala/rocket/CSR.scala b/src/main/scala/rocket/CSR.scala
index 17c35993..c3a05712 100644
--- a/src/main/scala/rocket/CSR.scala
+++ b/src/main/scala/rocket/CSR.scala
@@ -151,11 +151,12 @@ class PerfCounterIO(implicit p: Parameters) extends CoreBundle
 
 class TracedInstruction(implicit p: Parameters) extends CoreBundle {
   val valid = Bool()
-  val addr = UInt(width = coreMaxAddrBits)
+  val iaddr = UInt(width = coreMaxAddrBits)
   val insn = UInt(width = iLen)
   val priv = UInt(width = 3)
   val exception = Bool()
-  val cause = UInt(width = 1 + log2Ceil(xLen))
+  val interrupt = Bool()
+  val cause = UInt(width = log2Ceil(xLen))
   val tval = UInt(width = coreMaxAddrBits max iLen)
 }
 
@@ -519,7 +520,7 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
   assert(!reg_singleStepped || io.retire === UInt(0))
 
   val epc = ~(~io.pc | (coreInstBytes-1))
-  val write_badaddr = cause isOneOf (Causes.illegal_instruction, Causes.breakpoint,
+  val write_badaddr = exception && cause.isOneOf(Causes.illegal_instruction, Causes.breakpoint,
     Causes.misaligned_load, Causes.misaligned_store,
     Causes.load_access, Causes.store_access, Causes.fetch_access,
     Causes.load_page_fault, Causes.store_page_fault, Causes.fetch_page_fault)
@@ -771,9 +772,10 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
     t.exception := io.retire >= i && exception
     t.valid := io.retire > i || t.exception
     t.insn := insn
-    t.addr := io.pc
+    t.iaddr := io.pc
     t.priv := Cat(reg_debug, reg_mstatus.prv)
-    t.cause := Cat(cause(xLen-1), cause(log2Ceil(xLen)-1, 0))
+    t.cause := cause
+    t.interrupt := cause(xLen-1)
     t.tval := badaddr_value
   }
 
diff --git a/src/main/scala/rocket/DCache.scala b/src/main/scala/rocket/DCache.scala
index f38a0394..7f3b3b63 100644
--- a/src/main/scala/rocket/DCache.scala
+++ b/src/main/scala/rocket/DCache.scala
@@ -11,7 +11,8 @@ import freechips.rocketchip.tilelink._
 import freechips.rocketchip.util._
 import TLMessages._
 
-class DCacheErrors(implicit p: Parameters) extends L1HellaCacheBundle()(p) {
+class DCacheErrors(implicit p: Parameters) extends L1HellaCacheBundle()(p)
+    with CanHaveErrors {
   val correctable = (cacheParams.tagECC.canCorrect || cacheParams.dataECC.canCorrect).option(Valid(UInt(width = paddrBits)))
   val uncorrectable = (cacheParams.tagECC.canDetect || cacheParams.dataECC.canDetect).option(Valid(UInt(width = paddrBits)))
   val bus = Valid(UInt(width = paddrBits))
@@ -41,9 +42,9 @@ class DCacheDataArray(implicit p: Parameters) extends L1HellaCacheModule()(p) {
   val wMask = if (nWays == 1) eccMask else (0 until nWays).flatMap(i => eccMask.map(_ && io.req.bits.way_en(i)))
   val wWords = io.req.bits.wdata.grouped(encBits * (wordBits / eccBits))
   val addr = io.req.bits.addr >> rowOffBits
-  val dcache_data_arrays = Seq.fill(rowBytes / wordBytes) { SeqMem(nSets * refillCycles, Vec(nWays * (wordBits / eccBits), UInt(width = encBits))) }
-  val rdata = for ((array, i) <- dcache_data_arrays zipWithIndex) yield {
-    val valid = io.req.valid && (Bool(dcache_data_arrays.size == 1) || io.req.bits.wordMask(i))
+  val data_arrays = Seq.fill(rowBytes / wordBytes) { SeqMem(nSets * refillCycles, Vec(nWays * (wordBits / eccBits), UInt(width = encBits))) }
+  val rdata = for ((array, i) <- data_arrays zipWithIndex) yield {
+    val valid = io.req.valid && (Bool(data_arrays.size == 1) || io.req.bits.wordMask(i))
     when (valid && io.req.bits.write) {
       val wData = wWords(i).grouped(encBits)
       array.write(addr, Vec((0 until nWays).flatMap(i => wData)), wMask)
@@ -78,7 +79,7 @@ class DCacheModule(outer: DCache) extends HellaCacheModule(outer) {
   // tags
   val replacer = cacheParams.replacement
   val metaArb = Module(new Arbiter(new DCacheMetadataReq, 8))
-  val dcache_tag_array = SeqMem(nSets, Vec(nWays, UInt(width = tECC.width(metaArb.io.out.bits.data.getWidth))))
+  val tag_array = SeqMem(nSets, Vec(nWays, UInt(width = tECC.width(metaArb.io.out.bits.data.getWidth))))
 
   // data
   val data = Module(new DCacheDataArray)
@@ -188,9 +189,9 @@ class DCacheModule(outer: DCache) extends HellaCacheModule(outer) {
       when (metaReq.valid && metaReq.bits.write) {
         val wdata = tECC.encode(metaReq.bits.data.asUInt)
         val wmask = if (nWays == 1) Seq(true.B) else metaReq.bits.way_en.toBools
-        dcache_tag_array.write(metaIdx, Vec.fill(nWays)(wdata), wmask)
+        tag_array.write(metaIdx, Vec.fill(nWays)(wdata), wmask)
       }
-      val s1_meta = dcache_tag_array.read(metaIdx, metaReq.valid && !metaReq.bits.write)
+      val s1_meta = tag_array.read(metaIdx, metaReq.valid && !metaReq.bits.write)
       val s1_meta_uncorrected = s1_meta.map(tECC.decode(_).uncorrected.asTypeOf(new L1Metadata))
       val s1_tag = s1_paddr >> untagBits
       val s1_meta_hit_way = s1_meta_uncorrected.map(r => r.coh.isValid() && r.tag === s1_tag).asUInt
diff --git a/src/main/scala/rocket/ICache.scala b/src/main/scala/rocket/ICache.scala
index ce66c642..094cb7fc 100644
--- a/src/main/scala/rocket/ICache.scala
+++ b/src/main/scala/rocket/ICache.scala
@@ -36,7 +36,9 @@ class ICacheReq(implicit p: Parameters) extends CoreBundle()(p) with HasL1ICache
   val addr = UInt(width = vaddrBits)
 }
 
-class ICacheErrors(implicit p: Parameters) extends CoreBundle()(p) with HasL1ICacheParameters {
+class ICacheErrors(implicit p: Parameters) extends CoreBundle()(p)
+    with HasL1ICacheParameters
+    with CanHaveErrors {
   val correctable = (cacheParams.tagECC.canDetect || cacheParams.dataECC.canDetect).option(Valid(UInt(width = paddrBits)))
   val uncorrectable = (cacheParams.itimAddr.nonEmpty && cacheParams.dataECC.canDetect).option(Valid(UInt(width = paddrBits)))
 }
@@ -174,12 +176,12 @@ class ICacheModule(outer: ICache) extends LazyModuleImp(outer)
     v
   }
 
-  val icache_tag_array = SeqMem(nSets, Vec(nWays, UInt(width = tECC.width(1 + tagBits))))
-  val tag_rdata = icache_tag_array.read(s0_vaddr(untagBits-1,blockOffBits), !refill_done && s0_valid)
+  val tag_array = SeqMem(nSets, Vec(nWays, UInt(width = tECC.width(1 + tagBits))))
+  val tag_rdata = tag_array.read(s0_vaddr(untagBits-1,blockOffBits), !refill_done && s0_valid)
   val accruedRefillError = Reg(Bool())
   when (refill_done) {
     val enc_tag = tECC.encode(Cat(tl_out.d.bits.error, refill_tag))
-    icache_tag_array.write(refill_idx, Vec.fill(nWays)(enc_tag), Seq.tabulate(nWays)(repl_way === _))
+    tag_array.write(refill_idx, Vec.fill(nWays)(enc_tag), Seq.tabulate(nWays)(repl_way === _))
   }
 
   val vb_array = Reg(init=Bits(0, nSets*nWays))
@@ -220,8 +222,8 @@ class ICacheModule(outer: ICache) extends LazyModuleImp(outer)
   assert(!(s1_valid || s1_slaveValid) || PopCount(s1_tag_hit zip s1_tag_disparity map { case (h, d) => h && !d }) <= 1)
 
   require(tl_out.d.bits.data.getWidth % wordBits == 0)
-  val icache_data_arrays = Seq.fill(tl_out.d.bits.data.getWidth / wordBits) { SeqMem(nSets * refillCycles, Vec(nWays, UInt(width = dECC.width(wordBits)))) }
-  for ((data_array, i) <- icache_data_arrays zipWithIndex) {
+  val data_arrays = Seq.fill(tl_out.d.bits.data.getWidth / wordBits) { SeqMem(nSets * refillCycles, Vec(nWays, UInt(width = dECC.width(wordBits)))) }
+  for ((data_array, i) <- data_arrays zipWithIndex) {
     def wordMatch(addr: UInt) = addr.extract(log2Ceil(tl_out.d.bits.data.getWidth/8)-1, log2Ceil(wordBits/8)) === i
     def row(addr: UInt) = addr(untagBits-1, blockOffBits-log2Ceil(refillCycles))
     val s0_ren = (s0_valid && wordMatch(s0_vaddr)) || (s0_slaveValid && wordMatch(s0_slaveAddr))
diff --git a/src/main/scala/rocket/NBDcache.scala b/src/main/scala/rocket/NBDcache.scala
index 9cf462c3..8d9899d4 100644
--- a/src/main/scala/rocket/NBDcache.scala
+++ b/src/main/scala/rocket/NBDcache.scala
@@ -628,12 +628,12 @@ class DataArray(implicit p: Parameters) extends L1HellaCacheModule()(p) {
       val resp = Wire(Vec(rowWords, Bits(width = encRowBits)))
       val r_raddr = RegEnable(io.read.bits.addr, io.read.valid)
       for (i <- 0 until resp.size) {
-        val nbdcache_data_array = SeqMem(nSets*refillCycles, Vec(rowWords, Bits(width=encDataBits)))
+        val array = SeqMem(nSets*refillCycles, Vec(rowWords, Bits(width=encDataBits)))
         when (wway_en.orR && io.write.valid && io.write.bits.wmask(i)) {
           val data = Vec.fill(rowWords)(io.write.bits.data(encDataBits*(i+1)-1,encDataBits*i))
-          nbdcache_data_array.write(waddr, data, wway_en.toBools)
+          array.write(waddr, data, wway_en.toBools)
         }
-        resp(i) := nbdcache_data_array.read(raddr, rway_en.orR && io.read.valid).asUInt
+        resp(i) := array.read(raddr, rway_en.orR && io.read.valid).asUInt
       }
       for (dw <- 0 until rowWords) {
         val r = Vec(resp.map(_(encDataBits*(dw+1)-1,encDataBits*dw)))
@@ -645,12 +645,12 @@ class DataArray(implicit p: Parameters) extends L1HellaCacheModule()(p) {
     }
   } else {
     for (w <- 0 until nWays) {
-      val nbdcache_data_array = SeqMem(nSets*refillCycles, Vec(rowWords, Bits(width=encDataBits)))
+      val array = SeqMem(nSets*refillCycles, Vec(rowWords, Bits(width=encDataBits)))
       when (io.write.bits.way_en(w) && io.write.valid) {
         val data = Vec.tabulate(rowWords)(i => io.write.bits.data(encDataBits*(i+1)-1,encDataBits*i))
-        nbdcache_data_array.write(waddr, data, io.write.bits.wmask.toBools)
+        array.write(waddr, data, io.write.bits.wmask.toBools)
       }
-      io.resp(w) := nbdcache_data_array.read(raddr, io.read.bits.way_en(w) && io.read.valid).asUInt
+      io.resp(w) := array.read(raddr, io.read.bits.way_en(w) && io.read.valid).asUInt
     }
   }
 
diff --git a/src/main/scala/rocket/RocketCore.scala b/src/main/scala/rocket/RocketCore.scala
index 9ed8fea9..25e293fc 100644
--- a/src/main/scala/rocket/RocketCore.scala
+++ b/src/main/scala/rocket/RocketCore.scala
@@ -675,16 +675,16 @@ class Rocket(implicit p: Parameters) extends CoreModule()(p)
 
     when (t.valid) {
       when (wfd) {
-        printf ("%d 0x%x (0x%x) f%d p%d 0xXXXXXXXXXXXXXXXX\n", t.priv, t.addr, t.insn, rd, rd+UInt(32))
+        printf ("%d 0x%x (0x%x) f%d p%d 0xXXXXXXXXXXXXXXXX\n", t.priv, t.iaddr, t.insn, rd, rd+UInt(32))
       }
       .elsewhen (wxd && rd =/= UInt(0) && has_data) {
-        printf ("%d 0x%x (0x%x) x%d 0x%x\n", t.priv, t.addr, t.insn, rd, rf_wdata)
+        printf ("%d 0x%x (0x%x) x%d 0x%x\n", t.priv, t.iaddr, t.insn, rd, rf_wdata)
       }
       .elsewhen (wxd && rd =/= UInt(0) && !has_data) {
-        printf ("%d 0x%x (0x%x) x%d p%d 0xXXXXXXXXXXXXXXXX\n", t.priv, t.addr, t.insn, rd, rd)
+        printf ("%d 0x%x (0x%x) x%d p%d 0xXXXXXXXXXXXXXXXX\n", t.priv, t.iaddr, t.insn, rd, rd)
       }
       .otherwise {
-        printf ("%d 0x%x (0x%x)\n", t.priv, t.addr, t.insn)
+        printf ("%d 0x%x (0x%x)\n", t.priv, t.iaddr, t.insn)
       }
     }
 
@@ -694,7 +694,7 @@ class Rocket(implicit p: Parameters) extends CoreModule()(p)
   }
   else {
     printf("C%d: %d [%d] pc=[%x] W[r%d=%x][%d] R[r%d=%x] R[r%d=%x] inst=[%x] DASM(%x)\n",
-         io.hartid, csr.io.time(31,0), csr.io.trace(0).valid, csr.io.trace(0).addr(vaddrBitsExtended-1, 0),
+         io.hartid, csr.io.time(31,0), csr.io.trace(0).valid, csr.io.trace(0).iaddr(vaddrBitsExtended-1, 0),
          Mux(rf_wen && !(wb_set_sboard && wb_wen), rf_waddr, UInt(0)), rf_wdata, rf_wen,
          wb_reg_inst(19,15), Reg(next=Reg(next=ex_rs(0))),
          wb_reg_inst(24,20), Reg(next=Reg(next=ex_rs(1))),
diff --git a/src/main/scala/tile/RocketTile.scala b/src/main/scala/tile/RocketTile.scala
index f36dbdc0..376a2620 100644
--- a/src/main/scala/tile/RocketTile.scala
+++ b/src/main/scala/tile/RocketTile.scala
@@ -20,6 +20,7 @@ case class RocketTileParams(
     dataScratchpadBytes: Int = 0,
     boundaryBuffers: Boolean = false,
     trace: Boolean = false,
+    hcfOnUncorrectable: Boolean = false,
     name: Option[String] = Some("tile"),
     externalMasterBuffers: Int = 0,
     externalSlaveBuffers: Int = 0) extends TileParams {
@@ -131,6 +132,9 @@ class RocketTile(val rocketParams: RocketTileParams, val hartid: Int)(implicit p
 class RocketTileBundle(outer: RocketTile) extends BaseTileBundle(outer)
     with HasExternalInterruptsBundle
     with CanHaveScratchpadBundle
+    with CanHaltAndCatchFire {
+  val halt_and_catch_fire = outer.rocketParams.hcfOnUncorrectable.option(Bool(OUTPUT))
+}
 
 class RocketTileModule(outer: RocketTile) extends BaseTileModule(outer, () => new RocketTileBundle(outer))
     with HasExternalInterruptsModule
@@ -138,9 +142,12 @@ class RocketTileModule(outer: RocketTile) extends BaseTileModule(outer, () => ne
     with CanHaveScratchpadModule {
 
   val core = Module(p(BuildCore)(outer.p))
+  val uncorrectable = RegInit(Bool(false))
+
   decodeCoreInterrupts(core.io.interrupts) // Decode the interrupt vector
   core.io.hartid := io.hartid // Pass through the hartid
   io.trace.foreach { _ := core.io.trace }
+  io.halt_and_catch_fire.foreach { _ := uncorrectable }
   outer.frontend.module.io.cpu <> core.io.imem
   outer.frontend.module.io.reset_vector := io.reset_vector
   outer.frontend.module.io.hartid := io.hartid
@@ -154,6 +161,12 @@ class RocketTileModule(outer: RocketTile) extends BaseTileModule(outer, () => ne
   core.io.rocc.busy := roccCore.busy
   core.io.rocc.interrupt := roccCore.interrupt
 
+  when(!uncorrectable) { uncorrectable :=
+    List(outer.frontend.module.io.errors, outer.dcache.module.io.errors)
+      .flatMap { e => e.uncorrectable.map(_.valid) }
+      .reduceOption(_||_)
+      .getOrElse(false.B)
+  }
 
   // TODO eliminate this redundancy
   val h = dcachePorts.size
@@ -200,25 +213,26 @@ abstract class RocketTileWrapper(rtp: RocketTileParams, hartid: Int)(implicit p:
 
   def outputInterruptXingLatency: Int
 
-  rocket.intOutputNode.foreach { rocketIntOutputNode =>
-    val outXing = LazyModule(new IntXing(outputInterruptXingLatency))
-    intOutputNode.get := outXing.intnode
-    outXing.intnode := rocketIntOutputNode
-  }
+  intOutputNode.foreach { _ := rocket.intOutputNode.get }
 
   lazy val module = new LazyModuleImp(this) {
-    val io = new CoreBundle with HasExternallyDrivenTileConstants with CanHaveInstructionTracePort {
+    val io = new CoreBundle
+        with HasExternallyDrivenTileConstants
+        with CanHaveInstructionTracePort
+        with CanHaltAndCatchFire {
       val master = masterNode.bundleOut
       val slave = slaveNode.bundleIn
       val outputInterrupts = intOutputNode.map(_.bundleOut)
       val asyncInterrupts  = asyncIntNode.bundleIn
       val periphInterrupts = periphIntNode.bundleIn
       val coreInterrupts   = coreIntNode.bundleIn
+      val halt_and_catch_fire = rocket.module.io.halt_and_catch_fire.map(_.cloneType)
     }
     // signals that do not change based on crossing type:
     rocket.module.io.hartid := io.hartid
     rocket.module.io.reset_vector := io.reset_vector
     io.trace.foreach { _ := rocket.module.io.trace.get }
+    io.halt_and_catch_fire.foreach { _ := rocket.module.io.halt_and_catch_fire.get }
   }
 }
 
diff --git a/src/main/scala/util/ECC.scala b/src/main/scala/util/ECC.scala
index b947f175..6245513f 100644
--- a/src/main/scala/util/ECC.scala
+++ b/src/main/scala/util/ECC.scala
@@ -173,3 +173,8 @@ class SECDEDTest extends Module
   io.correctable := d.correctable
   io.uncorrectable := d.uncorrectable
 }
+
+trait CanHaveErrors extends Bundle {
+  val correctable: Option[ValidIO[UInt]]
+  val uncorrectable: Option[ValidIO[UInt]]
+}
diff --git a/src/main/scala/util/Misc.scala b/src/main/scala/util/Misc.scala
index 16fb4f98..86590d1b 100644
--- a/src/main/scala/util/Misc.scala
+++ b/src/main/scala/util/Misc.scala
@@ -26,6 +26,10 @@ trait Clocked extends Bundle {
   val reset = Bool()  
 }
 
+trait CanHaltAndCatchFire extends Bundle {
+  val halt_and_catch_fire: Option[Bool]
+}
+
 object DecoupledHelper {
   def apply(rvs: Bool*) = new DecoupledHelper(rvs)
 }
diff --git a/vsrc/AsyncResetReg.v b/vsrc/AsyncResetReg.v
index 47703f6a..aee4b639 100644
--- a/vsrc/AsyncResetReg.v
+++ b/vsrc/AsyncResetReg.v
@@ -54,7 +54,9 @@ module AsyncResetReg (
 `endif
 `ifdef RANDOMIZE_REG_INIT
       _RAND = {1{$random}};
-      q = _RAND[0];
+      if (~rst) begin
+         q = _RAND[0];
+      end
 `endif
    end
 `endif //  `ifdef RANDOMIZE
diff --git a/vsrc/plusarg_reader.v b/vsrc/plusarg_reader.v
index c3eb6513..0d245f9e 100644
--- a/vsrc/plusarg_reader.v
+++ b/vsrc/plusarg_reader.v
@@ -2,7 +2,7 @@
 
 // No default parameter values are intended, nor does IEEE 1800-2012 require them (clause A.2.4 param_assignment),
 // but Incisive demands them. These default values should never be used.
-module plusarg_reader #(FORMAT="borked=%d", DEFAULT=0) (
+module plusarg_reader #(parameter FORMAT="borked=%d", DEFAULT=0) (
    output [31:0] out
 );