diff --git a/ddk/build/build_rust_drv.sh b/ddk/build/build_rust_drv.sh
index 0297031..88ef0a1 100755
--- a/ddk/build/build_rust_drv.sh
+++ b/ddk/build/build_rust_drv.sh
@@ -24,7 +24,7 @@ cur_dir=$(cd "$(dirname "$0")"; pwd)
 echo "build_rust_drv.sh is at dir: $cur_dir"
 name=$1
 std=$2
-features=$4
+features=$3
 
 function clean() {
     rm -rf ./target
@@ -44,7 +44,7 @@ function build_rust_drv() {
     rust_so="$release_path/lib$name.so"
     combile_so="$release_path/libcombine.so"
     case "$std" in
-    "core") cargo +$os build $features -Z build-std=core --target=$target --release
+    "core") cargo +$os build $features --target=$target --release
         ;;
     "std") cargo +$os build $features --target=$target --release
         ;;
diff --git a/ddk/rust_drv_apis/src/lib.rs b/ddk/rust_drv_apis/src/lib.rs
index b8bd0c8..f9b8a8d 100644
--- a/ddk/rust_drv_apis/src/lib.rs
+++ b/ddk/rust_drv_apis/src/lib.rs
@@ -19,6 +19,7 @@ pub mod hwi_api;
 pub mod io_api;
 pub mod map_api;
 pub mod mem_copy_api;
+pub mod reg_api;
 pub mod share_mem_api;
 
 pub use framework::tee_defines::TeeResult;
diff --git a/ddk/rust_drv_apis/src/reg_api/mod.rs b/ddk/rust_drv_apis/src/reg_api/mod.rs
new file mode 100644
index 0000000..27943ab
--- /dev/null
+++ b/ddk/rust_drv_apis/src/reg_api/mod.rs
@@ -0,0 +1,20 @@
+// Copyright (C) 2023 Huawei Technologies Co., Ltd.
+// Licensed under the Mulan PSL v2.
+// You can use this software according to the terms and conditions of the Mulan
+// PSL v2.
+// You may obtain a copy of Mulan PSL v2 at:
+//     http://license.coscl.org.cn/MulanPSL2
+// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY
+// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+// See the Mulan PSL v2 for more details.
+mod reg_api_ffi;
+
+#[repr(C)]
+pub struct RegApi {}
+
+impl RegApi {
+    pub fn read_mpidr_el1() -> i64 {
+        unsafe { reg_api_ffi::drv_read_mpidr_el1() }
+    }
+}
diff --git a/ddk/rust_drv_apis/src/reg_api/reg_api_ffi.rs b/ddk/rust_drv_apis/src/reg_api/reg_api_ffi.rs
new file mode 100644
index 0000000..2e97eae
--- /dev/null
+++ b/ddk/rust_drv_apis/src/reg_api/reg_api_ffi.rs
@@ -0,0 +1,22 @@
+// Copyright (C) 2023 Huawei Technologies Co., Ltd.
+// Licensed under the Mulan PSL v2.
+// You can use this software according to the terms and conditions of the Mulan
+// PSL v2.
+// You may obtain a copy of Mulan PSL v2 at:
+//     http://license.coscl.org.cn/MulanPSL2
+// THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY
+// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
+// NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+// See the Mulan PSL v2 for more details.
+
+extern "C" {
+    ///
+    /// read mpidr el1 for cpu
+    ///
+    /// # Parameters
+    /// None
+    ///
+    /// # Return
+    /// mpidr el1
+    pub fn drv_read_mpidr_el1() -> i64;
+}
diff --git a/sdk/build/pack-TA/build_rust_ta.sh b/sdk/build/pack-TA/build_rust_ta.sh
index 35dd62c..0b07b1e 100755
--- a/sdk/build/pack-TA/build_rust_ta.sh
+++ b/sdk/build/pack-TA/build_rust_ta.sh
@@ -46,7 +46,7 @@ function build_rust_ta() {
     rust_so="$release_path/lib$name.so"
     combile_so="$release_path/libcombine.so"
     case "$std" in
-    "core") cargo +$os build $features -Z build-std=core --target=$target --release
+    "core") cargo +$os build $features --target=$target --release
         ;;
     "std") cargo +$os build $features --target=$target --release
         ;;