diff --git a/interface/arm_interface.h b/interface/arm_interface.h
index 066c642..52c5109 100644
--- a/interface/arm_interface.h
+++ b/interface/arm_interface.h
@@ -102,7 +102,9 @@ int32_t  osp_get_cfg_file(char* name, uint64_t *paddr, uint32_t *psize);
 int32_t  get_clock_module_status(volatile clock_module_status_s* clk_module_status_ptr);
 int32_t  set_clk_mode(clk_flag_e pseudo_flag);
 
-
+/* arm csu function  */
+int arm_csu_dma_1D_transfer(uint64_t addrSrc, uint64_t addrDst, uint32_t dataLen);
+int arm_csu_wait_done(uint8_t tag);
 
 #endif /* __ARM_INTERFACE_H__  */