IGU_CMD_E2_PROD_UPD_BASE
u32 addr_encode = IGU_CMD_E2_PROD_UPD_BASE + idu_sb_id;
(IGU_CMD_E2_PROD_UPD_BASE + MAX_SB_PER_PORT * NUM_OF_PORTS_PER_PATH - 1)
u32 addr_encode = IGU_CMD_E2_PROD_UPD_BASE + igu_sb_id;