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-rw-r--r--target-sparc/op_helper.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/target-sparc/op_helper.c b/target-sparc/op_helper.c
index aaacfc484e..ef3504fad1 100644
--- a/target-sparc/op_helper.c
+++ b/target-sparc/op_helper.c
@@ -1745,6 +1745,7 @@ uint64_t helper_ld_asi(target_ulong addr, int asi, int size, int sign)
     case 0x31: // Turbosparc RAM snoop
     case 0x32: // Turbosparc page table descriptor diagnostic
     case 0x39: /* data cache diagnostic register */
+    case 0x4c: /* SuperSPARC MMU Breakpoint Action register */
         ret = 0;
         break;
     case 0x38: /* SuperSPARC MMU Breakpoint Control Registers */