enable timer interrupt for K210

kernel/run-qemu-script-custom-llc

@@ -536,6 +536,9 @@ gen_full_rlib
 
 #if ! [[ -f outdir/ucore ]]
 #then
+if [[ ${K210} = 1 ]]; then
+    export LINK_K210='-L native=kendryte'
+fi
 rustc --edition=2018 --crate-name ucore src/main.rs \
     --color always --crate-type bin --emit=link \
     -C opt-level=1 \
@@ -560,7 +563,7 @@ rustc --edition=2018 --crate-name ucore src/main.rs \
     --extern ucore_process=$PWD/outdir/libucore_process.rlib \
     --extern volatile=$PWD/outdir/libvolatile.rlib \
     --extern xmas_elf=$PWD/outdir/libxmas_elf.rlib \
-    -L native=outdir
+    -L native=outdir ${LINK_K210}
 #fi
 
 if [[ ${K210} = 1 ]]; then

kernel/src/arch/riscv32/timer.rs

@@ -37,7 +37,8 @@ pub fn init() {
     unsafe { mie::set_mtimer(); }
     #[cfg(not(feature = "m_mode"))]
     unsafe { sie::set_stimer(); }
-
+    #[cfg(feature = "board_k210")]
+    unsafe { assert_eq!(clint_timer_init(), 0); }
     set_next();
     info!("timer: init end");
 }
@@ -46,22 +47,23 @@ pub fn init() {
 * @brief: 
 *   set the next timer interrupt
 */
+#[cfg(not(feature = "board_k210"))]
 pub fn set_next() {
     // 100Hz @ QEMU
     let timebase = 250000;
-    set_timer(get_cycle() + timebase);
+    sbi::set_timer(get_cycle() + timebase);
 }
 
-/*
+#[cfg(feature = "board_k210")]
-* @brief: 
+pub fn set_next() {
-*   set time for timer interrupt
-*/
-fn set_timer(t: u64) {
-    #[cfg(feature = "no_bbl")]
     unsafe {
-        asm!("csrw 0x321, $0; csrw 0x322, $1"
+        assert_eq!(clint_timer_start(10, true), 0);
-        : : "r"(t as u32), "r"((t >> 32) as u32) : : "volatile");
     }
-    #[cfg(not(feature = "no_bbl"))]
+}
-    sbi::set_timer(t);
+
+#[link(name = "kendryte")]
+#[cfg(feature = "board_k210")]
+extern "C" {
+    fn clint_timer_init() -> i32;
+    fn clint_timer_start(interval_ms: u64, single_shot: bool) -> i32;
 }