ppcopcodes: Make MQ read only on non-601 CPUs.

2024-03-02 01:45:24 -08:00 · 2024-03-02 01:45:24 -08:00 · 094f44e92c
parent 566706dd62
commit 094f44e92c
1 changed files with 3 additions and 1 deletions
--- a/cpu/ppc/ppcopcodes.cpp
+++ b/cpu/ppc/ppcopcodes.cpp
@ -927,7 +927,9 @@ void dppc_interpreter::ppc_mtspr() {
    }
 #endif

-    if (ref_spr == SPR::PVR) { // prevent writes to the read-only PVR
+    if (ref_spr == SPR::PVR || (
+        ref_spr == SPR::MQ && !is_601
+    )) { // prevent writes to the read-only registers
        return;
    }