CSR: add mconfigptr and default to zero (#3446)

Priv spec 1.12 requires that `mconfigptr` must be implemented. (cherry picked from commit 113eb12)
chipsalliance · Jul 25, 2023 · 7533edb · 7533edb
1 parent 836be7a
commit 7533edb
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/main/scala/rocket/CSR.scala b/src/main/scala/rocket/CSR.scala
@@ -837,8 +837,8 @@ class CSRFile(
     read_mapping += CSRs.vstvec -> read_vstvec
   }
 
-  // mimpid, marchid, and mvendorid are 0 unless overridden by customCSRs
-  Seq(CSRs.mimpid, CSRs.marchid, CSRs.mvendorid).foreach(id => read_mapping.getOrElseUpdate(id, 0.U))
+  // mimpid, marchid, mvendorid, and mconfigptr are 0 unless overridden by customCSRs
+  Seq(CSRs.mimpid, CSRs.marchid, CSRs.mvendorid, CSRs.mconfigptr).foreach(id => read_mapping.getOrElseUpdate(id, 0.U))
 
   val decoded_addr = {
     val addr = Cat(io.status.v, io.rw.addr)