看门狗特性

src/main/scala/backBoard/shin/ShinTop.scala

@@ -387,10 +387,45 @@ trait ShinTopSlave{ this: ShinTopBase =>
 }
 
 
+trait ShinTopWatchDog{ this: ShinTopBase =>
 
 
+  val isWdtSMEnable = for( _ <- 0 until 16 ) yield { RegInit(false.B) }
+  val wdtSMCnt = for( _ <- 0 until 16 ) yield { Reg(UInt(32.W)) }
+
+  for( i <- 0 until 8 ){
+    when( smUnit(i).io.enq ){
+      isWdtSMEnable(2*i) := false.B
+    } .elsewhen( ~isWdtSMEnable(2*i) & smUnit(i).io.sram_w.enw & interface.io.cReg.wdtEnable.extract(i+1) ){
+      isWdtSMEnable(2*i) := true.B
+    }
+
+    when( smUnit(i).io.deq ){
+      isWdtSMEnable(2*i + 1) := false.B
+    } .elsewhen( ~isWdtSMEnable(2*i + 1) & smUnit(i).io.sram_r.enr & interface.io.cReg.wdtEnable.extract(i+1) ){
+      isWdtSMEnable(2*i + 1) := true.B
+    }
+  }
+
+  for( i <- 0 until 16 ){
+    when( isWdtSMEnable(i) & (wdtSMCnt(i) < interface.io.cReg.wdtTarCnt(i+1)) ){
+      wdtSMCnt(i) := wdtSMCnt(i) + 1.U
+    } .elsewhen( ~isWdtSMEnable(i) ){
+      wdtSMCnt(i) := 0.U
+    }
+
+    assert( wdtSMCnt(i) <= interface.io.cReg.wdtTarCnt(i+1), "Assert Failed! wdtSMCnt is larger than wdtTarCnt, Special situation?" )
+    
+    interface.io.wdtTrigger(i+1) := wdtSMCnt(i) === interface.io.cReg.wdtTarCnt(i+1)
+  }
+  interface.io.wdtTrigger(0) := slaveParser.io.isRecWdtTrigger
+
+
+}
+
 
 
 class ShinTop extends ShinTopBase
 with ShinTopMaster
 with ShinTopSlave
+with ShinTopWatchDog