Debug Controls (#639)

* debug: Bump OpenOCD version to one that drives resets and sets cmderr appropriately.

* debug: Export the dmactive and ndreset signals to the top level and drive reset as intended in the TestHarness.

regression/Makefile

@@ -218,7 +218,7 @@ stamps/%/emulator-torture-$(TORTURE_CONFIG).stamp: stamps/%/emulator-debug.stamp
 #OPENOCD_HEAD ?= riscv
 OPENOCD_INSTALL ?= $(abspath $(TOP))/openocd-install
 #OPENOCD_VERSION = $(shell git ls-remote http://github.com/sifive/openocd.git $(OPENOCD_HEAD) | awk '{print $$1}')
-OPENOCD_VERSION = 7df6804934c13590fffb98012a3728225bd21c99
+OPENOCD_VERSION = c7a204b93abbbc286486967588449e7773fe09ac
 
 OPENOCD_DIR = $(OPENOCD_INSTALL)_$(OPENOCD_VERSION)/
 

src/main/scala/coreplex/RISCVPlatform.scala

@@ -37,6 +37,8 @@ trait CoreplexRISCVPlatformBundle extends CoreplexNetworkBundle {
   val debug = new ClockedDMIIO().flip
   val rtcToggle = Bool(INPUT)
   val resetVector = UInt(INPUT, p(XLen))
+  val ndreset = Bool(OUTPUT)
+  val dmactive = Bool(OUTPUT)
 }
 
 trait CoreplexRISCVPlatformModule extends CoreplexNetworkModule {
@@ -47,10 +49,8 @@ trait CoreplexRISCVPlatformModule extends CoreplexNetworkModule {
   // TODO in inheriting traits: Set this to something meaningful, e.g. "component is in reset or powered down"
   val nDebugComponents = outer.debug.intnode.bundleOut.size
   outer.debug.module.io.ctrl.debugUnavail := Vec.fill(nDebugComponents){Bool(false)}
-  // TODO in inheriting traits: Use these values in your power and reset controls.
-  // TODO Or move these signals to Coreplex Top Level
-  // ... := outer.debug.module.io.ctrl.dmactive
-  // ... := outer.debug.module.io.ctrl.ndreset
+  io.dmactive := outer.debug.module.io.ctrl.dmactive
+  io.ndreset := outer.debug.module.io.ctrl.ndreset
 
   // Synchronize the rtc into the coreplex
   val rtcSync = ShiftRegister(io.rtcToggle, 3)

src/main/scala/rocketchip/RISCVPlatform.scala

@@ -80,6 +80,8 @@ trait PeripheryDebugBundle extends HasTopLevelNetworksBundle {
   val jtag        = (p(IncludeJtagDTM)).option(new JTAGIO(hasTRSTn = false).flip)
   val jtag_reset  = (p(IncludeJtagDTM)).option(Bool(INPUT))
 
+  val ndreset = Bool(OUTPUT)
+  val dmactive = Bool(OUTPUT)
 }
 
 trait PeripheryDebugModule extends HasTopLevelNetworksModule {
@@ -100,6 +102,10 @@ trait PeripheryDebugModule extends HasTopLevelNetworksModule {
     outer.coreplex.module.io.debug.dmiClock := io.jtag.get.TCK
     outer.coreplex.module.io.debug.dmiReset := ResetCatchAndSync(io.jtag.get.TCK, io.jtag_reset.get, "dmiResetCatch")
   }
+
+  io.ndreset  := outer.coreplex.module.io.ndreset
+  io.dmactive := outer.coreplex.module.io.dmactive
+
 }
 
 /// Real-time clock is based on RTCPeriod relative to Top clock

src/main/scala/rocketchip/TestHarness.scala

@@ -14,7 +14,10 @@ class TestHarness()(implicit p: Parameters) extends Module {
   val io = new Bundle {
     val success = Bool(OUTPUT)
   }
+
   val dut = Module(LazyModule(new ExampleRocketTop).module)
+  dut.reset := reset | dut.io.ndreset
+
 
   dut.io.interrupts := UInt(0)
 

src/main/scala/uncore/devices/debug/Debug.scala

@@ -215,7 +215,7 @@ class DebugInternalBundle ()(implicit val p: Parameters) extends ParameterizedBu
 class DebugCtrlBundle (nComponents: Int)(implicit val p: Parameters) extends ParameterizedBundle()(p) {
   val debugUnavail    = Vec(nComponents, Bool()).asInput
   val ndreset         = Bool(OUTPUT)
-  val debugActive     = Bool(OUTPUT)
+  val dmactive        = Bool(OUTPUT)
 }
 
 //*****************************************
@@ -404,7 +404,7 @@ class TLDebugModuleOuter(device: Device)(implicit p: Parameters) extends LazyMod
     io.innerCtrl.bits.resumereq := DMCONTROLWrData.resumereq
 
     io.ctrl.ndreset := DMCONTROLReg.ndmreset
-    io.ctrl.debugActive := DMCONTROLReg.dmactive
+    io.ctrl.dmactive := DMCONTROLReg.dmactive
 
   }
 }
@@ -1109,7 +1109,7 @@ class TLDebugModule(implicit p: Parameters) extends LazyModule {
     dmOuter.module.clock := io.dmi.dmiClock
 
     dmInner.module.io.innerCtrl    := dmOuter.module.io.innerCtrl
-    dmInner.module.io.dmactive     := dmOuter.module.io.ctrl.debugActive
+    dmInner.module.io.dmactive     := dmOuter.module.io.ctrl.dmactive
     dmInner.module.io.debugUnavail := io.ctrl.debugUnavail
 
     io.ctrl <> dmOuter.module.io.ctrl