Initial Commit

1 files changed, 17 insertions, 0 deletions

diff --git a/VexRiscv/src/main/scala/vexriscv/plugin/SingleInstructionLimiterPlugin.scala b/VexRiscv/src/main/scala/vexriscv/plugin/SingleInstructionLimiterPlugin.scala
new file mode 100644
index 0000000..c6c9706
--- /dev/null
+++ b/VexRiscv/src/main/scala/vexriscv/plugin/SingleInstructionLimiterPlugin.scala
@@ -0,0 +1,17 @@
+package vexriscv.plugin
+
+import vexriscv._
+import spinal.core._
+import spinal.lib._
+
+
+class SingleInstructionLimiterPlugin() extends Plugin[VexRiscv] {
+  override def build(pipeline: VexRiscv): Unit = {
+    import pipeline._
+    import pipeline.config._
+    val fetcher = pipeline.service(classOf[IBusFetcher])
+    when(fetcher.incoming() || List(decode,execute,memory,writeBack).map(_.arbitration.isValid).orR) {
+      fetcher.haltIt()
+    }
+  }
+}