diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..3312f1f
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
index 6ebf56f..50f5122 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,9 @@ Rust version of THU [uCore OS](https://github.com/chyyuu/ucore_os_lab/).
 
 Going to be the next generation teaching operating system.
 
-Support arch: x86_64, RISCV32I, AArch64 (WIP).
+Supported architectures: x86_64, RISCV32IMA(S/M), AArch64
+
+Tested boards: QEMU, Raspberry Pi 3B+
 
 [Dev docs](https://rucore.gitbook.io/rust-os-docs/) (in Chinese)