diff --git a/src/occ_gpe0/firdata/scom_util.c b/src/occ_gpe0/firdata/scom_util.c
index 2546107b..d7169639 100644
--- a/src/occ_gpe0/firdata/scom_util.c
+++ b/src/occ_gpe0/firdata/scom_util.c
@@ -303,6 +303,7 @@ int32_t translate_addr( SCOM_Trgt_t i_trgt, uint64_t i_addr, uint64_t * o_addr )
         uint8_t l_chiplet_id = ( 2 == l_chip_unit_num ) ? N1_CHIPLET_ID : N3_CHIPLET_ID ;
         set_chiplet_id( l_chiplet_id, o_addr );
         uint8_t l_sat_id = get_sat_id( i_addr );
+        uint8_t l_ring = get_ring(i_addr) & 0xF;
 
         // Covers the following addresses:
         // NPU0: 05011000 to 050113FF
diff --git a/src/occ_gpe0/firdata/scom_util.h b/src/occ_gpe0/firdata/scom_util.h
index 278f3047..9a367c3f 100644
--- a/src/occ_gpe0/firdata/scom_util.h
+++ b/src/occ_gpe0/firdata/scom_util.h
@@ -89,6 +89,14 @@ typedef enum
     P9A_MC_USTL_CHAN3_SAT_ID = 0xB,   ///< USTL registers channel 3
 } p9a_mc_sat_id_t;
 
+typedef enum
+{
+    N3_NPU_0_RING_ID      = 0x5,
+    P9A_NPU_2_RING_ID     = 0x7,
+    P9A_NPU_2_FIR_RING_ID = 0x8,
+    P9A_NPU_0_FIR_RING_ID = 0xF,
+} p9a_npu_ring_id_t;
+
 /** @brief  Performs a hardware scom on a regular register.
  *  @param  i_trgt The SCOM target.
  *  @param  i_addr 32-bit SCOM address.