devices: switch to using node-style API (#44)

[sifive-blocks.git] / src / main / scala / devices / mockaon / MockAONPeriphery.scala

diff --git a/src/main/scala/devices/mockaon/MockAONPeriphery.scala b/src/main/scala/devices/mockaon/MockAONPeriphery.scala
index 8b6303e2ffb32f03abe1e8cecfe88aef2548216c..f7f563bc77e9d8fea1f5188fff3782c22abf10a5 100644 (file)
--- a/src/main/scala/devices/mockaon/MockAONPeriphery.scala
+++ b/src/main/scala/devices/mockaon/MockAONPeriphery.scala
@@ -3,11 +3,13 @@ package sifive.blocks.devices.mockaon
 
 import Chisel._
 import freechips.rocketchip.config.Field
+import freechips.rocketchip.util.SynchronizerShiftReg
 import freechips.rocketchip.coreplex.{HasPeripheryBus, HasInterruptBus}
 import freechips.rocketchip.devices.debug.HasPeripheryDebug
 import freechips.rocketchip.devices.tilelink.HasPeripheryClint
-import freechips.rocketchip.diplomacy.{LazyModule, LazyMultiIOModuleImp}
-import freechips.rocketchip.tilelink.{IntXing, TLAsyncCrossingSource}
+import freechips.rocketchip.diplomacy.{LazyModule, LazyModuleImp}
+import freechips.rocketchip.tilelink.{TLAsyncCrossingSource}
+import freechips.rocketchip.interrupts._
 import freechips.rocketchip.util.ResetCatchAndSync
 
 case object PeripheryMockAONKey extends Field[MockAONParams]
@@ -20,8 +22,8 @@ trait HasPeripheryMockAON extends HasPeripheryBus
   // are in the proper clock domain.
   val mockAONParams= p(PeripheryMockAONKey)
   val aon = LazyModule(new MockAONWrapper(pbus.beatBytes, mockAONParams))
-  aon.node := pbus.toAsyncVariableWidthSlaves(sync = 3)
-  ibus.fromAsync := aon.intnode
+  aon.node := TLAsyncCrossingSource() := pbus.toVariableWidthSlaves
+  ibus.fromSync := IntSyncCrossingSink() := aon.intnode
 }
 
 trait HasPeripheryMockAONBundle {
@@ -31,7 +33,7 @@ trait HasPeripheryMockAONBundle {
   }
 }
 
-trait HasPeripheryMockAONModuleImp extends LazyMultiIOModuleImp with HasPeripheryMockAONBundle {
+trait HasPeripheryMockAONModuleImp extends LazyModuleImp with HasPeripheryMockAONBundle {
   val outer: HasPeripheryMockAON
   val aon = IO(new MockAONWrapperBundle)
 
@@ -42,7 +44,12 @@ trait HasPeripheryMockAONModuleImp extends LazyMultiIOModuleImp with HasPeripher
   outer.aon.module.clock := Bool(false).asClock
   outer.aon.module.reset := Bool(true)
 
-  outer.clint.module.io.rtcTick := outer.aon.module.io.rtc.asUInt.toBool
+  // Synchronize the external toggle into the clint
+  val rtc_sync = SynchronizerShiftReg(outer.aon.module.io.rtc.asUInt.toBool, 3, Some("rtc"))
+  val rtc_last = Reg(init = Bool(false), next=rtc_sync)
+  val rtc_tick = Reg(init = Bool(false), next=(rtc_sync & (~rtc_last)))
+
+  outer.clint.module.io.rtcTick := rtc_tick
 
   outer.aon.module.io.ndreset := outer.debug.module.io.ctrl.ndreset
 }