CSR: mark misa as unwritable (#213)

OSCPU · Nov 6, 2024 · 61923a1 · 61923a1
1 parent 5dafeda
commit 61923a1
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/main/scala/nutcore/backend/fu/CSR.scala b/src/main/scala/nutcore/backend/fu/CSR.scala
@@ -449,7 +449,7 @@ class CSR(implicit val p: NutCoreConfig) extends NutCoreModule with HasCSRConst{
 
     // Machine Trap Setup
     MaskedRegMap(Mstatus, mstatus, mstatusWMask, mstatusUpdateSideEffect),
-    MaskedRegMap(Misa, misa), // now MXL, EXT is not changeable
+    MaskedRegMap(Misa, misa, 0.U, MaskedRegMap.Unwritable),
     MaskedRegMap(Medeleg, medeleg, "hbbff".U(64.W)),
     MaskedRegMap(Mideleg, mideleg, "h222".U(64.W)),
     MaskedRegMap(Mie, mie),