Remove K210 support.

os/src/main.rs

@@ -31,10 +31,6 @@ extern crate alloc;
 #[macro_use]
 extern crate bitflags;
 
-#[cfg(feature = "board_k210")]
-#[path = "boards/k210.rs"]
-mod board;
-#[cfg(not(any(feature = "board_k210")))]
 #[path = "boards/qemu.rs"]
 mod board;
 

os/src/sbi.rs

@@ -12,6 +12,7 @@ const SBI_REMOTE_FENCE_I: usize = 5;
 const SBI_REMOTE_SFENCE_VMA: usize = 6;
 const SBI_REMOTE_SFENCE_VMA_ASID: usize = 7;
 const SBI_SHUTDOWN: usize = 8;
+
 /// general sbi call
 #[inline(always)]
 fn sbi_call(which: usize, arg0: usize, arg1: usize, arg2: usize) -> usize {

os/src/task/mod.rs

@@ -59,7 +59,6 @@ pub fn suspend_current_and_run_next() {
 /// pid of usertests app in make run TEST=1
 pub const IDLE_PID: usize = 0;
 
-#[cfg(feature = "board_qemu")]
 use crate::board::QEMUExit;
 
 /// Exit the current 'Running' task and run the next task in task list.
@@ -67,9 +66,7 @@ pub fn exit_current_and_run_next(exit_code: i32) {
     // take from Processor
     let task = take_current_task().unwrap();
 
-    #[cfg(feature = "board_qemu")]
     let pid = task.getpid();
-    #[cfg(feature = "board_qemu")]
     if pid == IDLE_PID {
         println!(
             "[kernel] Idle process exit with exit_code {} ...",