Fix timer interrupt

kernel/src/arch/aarch64/interrupt/consts.rs

@@ -36,3 +36,7 @@ pub fn is_syscall(trap: usize) -> bool {
 pub fn is_intr(trap: usize) -> bool {
     IrqMin <= trap && trap <= IrqMax
 }
+
+pub fn is_timer_intr(trap: usize) -> bool {
+    trap == Timer
+}

kernel/src/arch/mipsel/interrupt/consts.rs

@@ -28,3 +28,12 @@ pub fn is_intr(trap: usize) -> bool {
         _ => false,
     }
 }
+
+pub fn is_timer_intr(trap: usize) -> bool {
+    use cp0::cause::Exception as E;
+    let cause = cp0::cause::Cause { bits: trap as u32 };
+    match cause.cause() {
+        E::Interrupt => trap & (1 << 30) != 0,
+        _ => false,
+    }
+}

kernel/src/arch/mipsel/interrupt/mod.rs

@@ -133,7 +133,7 @@ fn ipi() {
     cp0::cause::reset_soft_int1();
 }
 
-fn timer() {
+pub fn timer() {
     super::timer::set_next();
     crate::trap::timer();
 }

kernel/src/arch/riscv/interrupt/consts.rs

@@ -21,3 +21,7 @@ pub fn is_syscall(trap: usize) -> bool {
 pub fn is_intr(trap: usize) -> bool {
     IrqMin <= trap && trap <= IrqMax
 }
+
+pub fn is_timer_intr(trap: usize) -> bool {
+    trap == Timer
+}

kernel/src/arch/x86_64/interrupt/consts.rs

@@ -57,3 +57,7 @@ pub fn is_syscall(trap: usize) -> bool {
 pub fn is_intr(trap: usize) -> bool {
     IrqMin <= trap && trap <= IrqMax
 }
+
+pub fn is_timer_intr(trap: usize) -> bool {
+    trap == Timer
+}

kernel/src/process/thread.rs

@@ -2,7 +2,7 @@ use super::{
     abi::{self, ProcInitInfo},
     add_to_process_table, Pid, Process, PROCESSORS,
 };
-use crate::arch::interrupt::consts::{is_intr, is_page_fault, is_syscall};
+use crate::arch::interrupt::consts::{is_intr, is_page_fault, is_syscall, is_timer_intr};
 use crate::arch::interrupt::{get_trap_num, handle_user_page_fault};
 use crate::arch::{
     cpu,
@@ -520,6 +520,9 @@ pub fn spawn(thread: Arc<Thread>) {
                 _ if is_intr(trap_num) => {
                     crate::arch::interrupt::ack(trap_num);
                     trace!("handle irq {:#x}", trap_num);
+                    if is_timer_intr(trap_num) {
+                        crate::arch::interrupt::timer();
+                    }
                     IRQ_MANAGER.read().try_handle_interrupt(Some(trap_num));
                 }
                 _ => {