diff --git a/os/src/console.rs b/os/src/console.rs
index 31614c64..5c8daaf7 100644
--- a/os/src/console.rs
+++ b/os/src/console.rs
@@ -1,4 +1,8 @@
-use crate::drivers::chardev::{CharDevice, UART};
+use crate::drivers::chardev::CharDevice;
+#[cfg(feature = "board_qemu")]
+use crate::drivers::chardev::UART;
+#[cfg(feature = "board_k210")]
+use crate::sbi::console_putchar;
 use core::fmt::{self, Write};
 
 struct Stdout;
@@ -6,7 +10,10 @@ struct Stdout;
 impl Write for Stdout {
     fn write_str(&mut self, s: &str) -> fmt::Result {
         for c in s.chars() {
+            #[cfg(feature = "board_qemu")]
             UART.write(c as u8);
+            #[cfg(feature = "board_k210")]
+            console_putchar(c as usize);
         }
         Ok(())
     }
diff --git a/os/src/drivers/chardev/mod.rs b/os/src/drivers/chardev/mod.rs
index 28665769..2a04f8ed 100644
--- a/os/src/drivers/chardev/mod.rs
+++ b/os/src/drivers/chardev/mod.rs
@@ -1,17 +1,17 @@
 mod ns16550a;
 
-pub use ns16550a::NS16550a;
-
+#[cfg(feature = "board_qemu")]
 use crate::board::CharDeviceImpl;
 use alloc::sync::Arc;
 use lazy_static::*;
+pub use ns16550a::NS16550a;
 
 pub trait CharDevice {
     fn read(&self) -> u8;
     fn write(&self, ch: u8);
     fn handle_irq(&self);
 }
-
+#[cfg(feature = "board_qemu")]
 lazy_static! {
     pub static ref UART: Arc<CharDeviceImpl> = Arc::new(CharDeviceImpl::new());
 }
diff --git a/os/src/drivers/mod.rs b/os/src/drivers/mod.rs
index 337c76d9..4ecf8a9d 100644
--- a/os/src/drivers/mod.rs
+++ b/os/src/drivers/mod.rs
@@ -1,9 +1,14 @@
 pub mod block;
 pub mod chardev;
+#[cfg(feature = "board_qemu")]
 pub mod gpu;
+#[cfg(feature = "board_qemu")]
 pub mod input;
 pub mod plic;
 pub use block::BLOCK_DEVICE;
+#[cfg(feature = "board_qemu")]
 pub use chardev::UART;
+#[cfg(feature = "board_qemu")]
 pub use gpu::*;
+#[cfg(feature = "board_qemu")]
 pub use input::*;
diff --git a/os/src/fs/stdio.rs b/os/src/fs/stdio.rs
index 7326822d..33af6033 100644
--- a/os/src/fs/stdio.rs
+++ b/os/src/fs/stdio.rs
@@ -1,6 +1,12 @@
 use super::File;
-use crate::drivers::chardev::{CharDevice, UART};
+use crate::drivers::chardev::CharDevice;
+#[cfg(feature = "board_qemu")]
+use crate::drivers::chardev::UART;
 use crate::mm::UserBuffer;
+#[cfg(feature = "board_k210")]
+use crate::sbi::console_getchar;
+#[cfg(feature = "board_k210")]
+use crate::task::suspend_current_and_run_next;
 
 pub struct Stdin;
 pub struct Stdout;
@@ -12,6 +18,7 @@ impl File for Stdin {
     fn writable(&self) -> bool {
         false
     }
+    #[cfg(feature = "board_qemu")]
     fn read(&self, mut user_buf: UserBuffer) -> usize {
         assert_eq!(user_buf.len(), 1);
         //println!("before UART.read() in Stdin::read()");
@@ -21,6 +28,27 @@ impl File for Stdin {
         }
         1
     }
+    #[cfg(feature = "board_k210")]
+    fn read(&self, mut user_buf: UserBuffer) -> usize {
+        assert_eq!(user_buf.len(), 1);
+        // busy loop
+        let mut c: usize;
+        loop {
+            c = console_getchar();
+            if c == 0 {
+                suspend_current_and_run_next();
+                continue;
+            } else {
+                break;
+            }
+        }
+        let ch = c as u8;
+        unsafe {
+            user_buf.buffers[0].as_mut_ptr().write_volatile(ch);
+        }
+        1
+    }
+
     fn write(&self, _user_buf: UserBuffer) -> usize {
         panic!("Cannot write to stdin!");
     }
diff --git a/os/src/main.rs b/os/src/main.rs
index 3b84c24d..014b0299 100644
--- a/os/src/main.rs
+++ b/os/src/main.rs
@@ -2,7 +2,7 @@
 #![no_main]
 #![feature(panic_info_message)]
 #![feature(alloc_error_handler)]
-
+#[cfg(feature = "board_qemu")]
 use crate::drivers::{GPU_DEVICE, KEYBOARD_DEVICE, MOUSE_DEVICE};
 
 extern crate alloc;
@@ -22,6 +22,7 @@ mod console;
 mod config;
 mod drivers;
 mod fs;
+#[cfg(feature = "board_qemu")]
 mod gui;
 mod lang_items;
 mod mm;
@@ -60,10 +61,13 @@ pub fn rust_main() -> ! {
     clear_bss();
     mm::init();
     println!("KERN: init gpu");
+    #[cfg(feature = "board_qemu")]
     GPU_DEVICE.clone();
     println!("KERN: init keyboard");
+    #[cfg(feature = "board_qemu")]
     KEYBOARD_DEVICE.clone();
     println!("KERN: init mouse");
+    #[cfg(feature = "board_qemu")]
     MOUSE_DEVICE.clone();
     println!("KERN: init trap");
     trap::init();
diff --git a/os/src/sbi.rs b/os/src/sbi.rs
index 50fcd975..a218ec8b 100644
--- a/os/src/sbi.rs
+++ b/os/src/sbi.rs
@@ -40,9 +40,13 @@ pub fn console_getchar() -> usize {
     sbi_call(SBI_CONSOLE_GETCHAR, 0, 0, 0)
 }
 
+#[cfg(feature = "board_qemu")]
 use crate::board::QEMUExit;
 pub fn shutdown(exit_code: usize) -> ! {
-    //sbi_call(SBI_SHUTDOWN, exit_code, 0, 0);
+    #[cfg(feature = "board_k210")]
+    sbi_call(SBI_SHUTDOWN, exit_code, 0, 0);
+    #[cfg(feature = "board_qemu")]
     crate::board::QEMU_EXIT_HANDLE.exit_failure();
+    #[cfg(feature = "board_k210")]
     panic!("It should shutdown!");
 }
diff --git a/os/src/syscall/mod.rs b/os/src/syscall/mod.rs
index 5d8660f9..70a1f167 100644
--- a/os/src/syscall/mod.rs
+++ b/os/src/syscall/mod.rs
@@ -27,18 +27,22 @@ const SYSCALL_CONDVAR_SIGNAL: usize = 1031;
 const SYSCALL_CONDVAR_WAIT: usize = 1032;
 const SYSCALL_CREATE_DESKTOP: usize = 2000;
 mod fs;
+#[cfg(feature = "board_qemu")]
 mod gui;
 mod process;
 mod sync;
 mod thread;
-
+#[cfg(feature = "board_qemu")]
 pub use self::gui::create_desktop;
 use fs::*;
+
+#[cfg(feature = "board_qemu")]
 pub use gui::PAD;
 use process::*;
 use sync::*;
 use thread::*;
 
+#[cfg(feature = "board_qemu")]
 pub fn syscall(syscall_id: usize, args: [usize; 3]) -> isize {
     match syscall_id {
         SYSCALL_DUP => sys_dup(args[0]),
@@ -72,3 +76,37 @@ pub fn syscall(syscall_id: usize, args: [usize; 3]) -> isize {
         _ => panic!("Unsupported syscall_id: {}", syscall_id),
     }
 }
+
+#[cfg(feature = "board_k210")]
+pub fn syscall(syscall_id: usize, args: [usize; 3]) -> isize {
+    match syscall_id {
+        SYSCALL_DUP => sys_dup(args[0]),
+        SYSCALL_OPEN => sys_open(args[0] as *const u8, args[1] as u32),
+        SYSCALL_CLOSE => sys_close(args[0]),
+        SYSCALL_PIPE => sys_pipe(args[0] as *mut usize),
+        SYSCALL_READ => sys_read(args[0], args[1] as *const u8, args[2]),
+        SYSCALL_WRITE => sys_write(args[0], args[1] as *const u8, args[2]),
+        SYSCALL_EXIT => sys_exit(args[0] as i32),
+        SYSCALL_SLEEP => sys_sleep(args[0]),
+        SYSCALL_YIELD => sys_yield(),
+        SYSCALL_KILL => sys_kill(args[0], args[1] as u32),
+        SYSCALL_GET_TIME => sys_get_time(),
+        SYSCALL_GETPID => sys_getpid(),
+        SYSCALL_FORK => sys_fork(),
+        SYSCALL_EXEC => sys_exec(args[0] as *const u8, args[1] as *const usize),
+        SYSCALL_WAITPID => sys_waitpid(args[0] as isize, args[1] as *mut i32),
+        SYSCALL_THREAD_CREATE => sys_thread_create(args[0], args[1]),
+        SYSCALL_GETTID => sys_gettid(),
+        SYSCALL_WAITTID => sys_waittid(args[0]) as isize,
+        SYSCALL_MUTEX_CREATE => sys_mutex_create(args[0] == 1),
+        SYSCALL_MUTEX_LOCK => sys_mutex_lock(args[0]),
+        SYSCALL_MUTEX_UNLOCK => sys_mutex_unlock(args[0]),
+        SYSCALL_SEMAPHORE_CREATE => sys_semaphore_create(args[0]),
+        SYSCALL_SEMAPHORE_UP => sys_semaphore_up(args[0]),
+        SYSCALL_SEMAPHORE_DOWN => sys_semaphore_down(args[0]),
+        SYSCALL_CONDVAR_CREATE => sys_condvar_create(args[0]),
+        SYSCALL_CONDVAR_SIGNAL => sys_condvar_signal(args[0]),
+        SYSCALL_CONDVAR_WAIT => sys_condvar_wait(args[0], args[1]),
+        _ => panic!("Unsupported syscall_id: {}", syscall_id),
+    }
+}
diff --git a/os/src/task/mod.rs b/os/src/task/mod.rs
index 3c762b77..31c792c9 100644
--- a/os/src/task/mod.rs
+++ b/os/src/task/mod.rs
@@ -56,7 +56,7 @@ pub fn block_current_and_run_next() {
     let task_cx_ptr = block_current_task();
     schedule(task_cx_ptr);
 }
-
+#[cfg(feature = "board_qemu")]
 use crate::board::QEMUExit;
 
 pub fn exit_current_and_run_next(exit_code: i32) {
@@ -75,6 +75,7 @@ pub fn exit_current_and_run_next(exit_code: i32) {
     // the process should terminate at once
     if tid == 0 {
         let pid = process.getpid();
+        #[cfg(feature = "board_qemu")]
         if pid == IDLE_PID {
             println!(
                 "[kernel] Idle process exit with exit_code {} ...",