diff --git a/kernel/comps/time/src/tsc.rs b/kernel/comps/time/src/tsc.rs
index f069e4d8..981f577d 100644
--- a/kernel/comps/time/src/tsc.rs
+++ b/kernel/comps/time/src/tsc.rs
@@ -6,10 +6,9 @@
 use alloc::sync::Arc;
 use core::sync::atomic::{AtomicU64, Ordering};
 
-use ostd::arch::{
-    read_tsc,
-    timer::{self, TIMER_FREQ},
-    tsc_freq,
+use ostd::{
+    arch::{read_tsc, timer::TIMER_FREQ, tsc_freq},
+    timer,
 };
 use spin::Once;
 
diff --git a/kernel/libs/aster-bigtcp/src/iface/time.rs b/kernel/libs/aster-bigtcp/src/iface/time.rs
index 7936dd74..cd6d70df 100644
--- a/kernel/libs/aster-bigtcp/src/iface/time.rs
+++ b/kernel/libs/aster-bigtcp/src/iface/time.rs
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: MPL-2.0
 
-use ostd::arch::timer::Jiffies;
+use ostd::timer::Jiffies;
 
 pub(super) fn get_network_timestamp() -> smoltcp::time::Instant {
     let millis = Jiffies::elapsed().as_duration().as_millis();
diff --git a/kernel/src/net/iface/poll.rs b/kernel/src/net/iface/poll.rs
index 67f2ca70..f46284e3 100644
--- a/kernel/src/net/iface/poll.rs
+++ b/kernel/src/net/iface/poll.rs
@@ -4,7 +4,7 @@ use alloc::sync::Arc;
 use core::time::Duration;
 
 use log::trace;
-use ostd::arch::timer::Jiffies;
+use ostd::timer::Jiffies;
 
 use super::{ext::IfaceEx, Iface, IFACES};
 use crate::{
diff --git a/kernel/src/process/process/timer_manager.rs b/kernel/src/process/process/timer_manager.rs
index 0a31aabd..bb42b073 100644
--- a/kernel/src/process/process/timer_manager.rs
+++ b/kernel/src/process/process/timer_manager.rs
@@ -9,11 +9,9 @@ use core::time::Duration;
 
 use id_alloc::IdAlloc;
 use ostd::{
-    arch::{
-        timer::{self, TIMER_FREQ},
-        trap::is_kernel_interrupted,
-    },
+    arch::{timer::TIMER_FREQ, trap::is_kernel_interrupted},
     sync::Mutex,
+    timer,
 };
 
 use super::Process;
diff --git a/kernel/src/time/clocks/system_wide.rs b/kernel/src/time/clocks/system_wide.rs
index 0969d53e..12c6ef92 100644
--- a/kernel/src/time/clocks/system_wide.rs
+++ b/kernel/src/time/clocks/system_wide.rs
@@ -5,11 +5,11 @@ use core::time::Duration;
 
 use aster_time::read_monotonic_time;
 use ostd::{
-    arch::timer::Jiffies,
     cpu::{num_cpus, PinCurrentCpu},
     cpu_local,
     sync::SpinLock,
     task::disable_preempt,
+    timer::Jiffies,
 };
 use paste::paste;
 use spin::Once;
diff --git a/kernel/src/time/softirq.rs b/kernel/src/time/softirq.rs
index afcae100..52bcbed8 100644
--- a/kernel/src/time/softirq.rs
+++ b/kernel/src/time/softirq.rs
@@ -2,7 +2,7 @@
 
 use alloc::{boxed::Box, vec::Vec};
 
-use ostd::{arch::timer, sync::RwLock, trap::SoftIrqLine};
+use ostd::{sync::RwLock, timer, trap::SoftIrqLine};
 
 use crate::softirq_id::TIMER_SOFTIRQ_ID;
 
diff --git a/ostd/src/arch/x86/timer/mod.rs b/ostd/src/arch/x86/timer/mod.rs
index 2efc3a73..44177c99 100644
--- a/ostd/src/arch/x86/timer/mod.rs
+++ b/ostd/src/arch/x86/timer/mod.rs
@@ -4,19 +4,16 @@
 
 mod apic;
 mod hpet;
-mod jiffies;
 pub(crate) mod pit;
 
-use alloc::{boxed::Box, vec::Vec};
-use core::{cell::RefCell, sync::atomic::Ordering};
+use core::sync::atomic::Ordering;
 
-pub use jiffies::Jiffies;
 use spin::Once;
 
 use self::apic::APIC_TIMER_CALLBACK;
 use crate::{
     arch::x86::kernel,
-    cpu_local,
+    timer::INTERRUPT_CALLBACKS,
     trap::{self, IrqLine, TrapFrame},
 };
 
@@ -51,24 +48,8 @@ pub(super) fn init() {
     TIMER_IRQ.call_once(|| timer_irq);
 }
 
-cpu_local! {
-    static INTERRUPT_CALLBACKS: RefCell<Vec<Box<dyn Fn() + Sync + Send>>> = RefCell::new(Vec::new());
-}
-
-/// Registers a function that will be executed during the system timer interruption.
-pub fn register_callback<F>(func: F)
-where
-    F: Fn() + Sync + Send + 'static,
-{
-    let irq_guard = trap::disable_local();
-    INTERRUPT_CALLBACKS
-        .get_with(&irq_guard)
-        .borrow_mut()
-        .push(Box::new(func));
-}
-
 fn timer_callback(_: &TrapFrame) {
-    jiffies::ELAPSED.fetch_add(1, Ordering::SeqCst);
+    crate::timer::jiffies::ELAPSED.fetch_add(1, Ordering::SeqCst);
 
     let irq_guard = trap::disable_local();
     let callbacks_guard = INTERRUPT_CALLBACKS.get_with(&irq_guard);
diff --git a/ostd/src/lib.rs b/ostd/src/lib.rs
index 0a1c0442..eef6f7b7 100644
--- a/ostd/src/lib.rs
+++ b/ostd/src/lib.rs
@@ -45,6 +45,7 @@ pub mod prelude;
 pub mod smp;
 pub mod sync;
 pub mod task;
+pub mod timer;
 pub mod trap;
 pub mod user;
 
diff --git a/ostd/src/logger.rs b/ostd/src/logger.rs
index e1474126..8a58798b 100644
--- a/ostd/src/logger.rs
+++ b/ostd/src/logger.rs
@@ -13,8 +13,8 @@
 use log::{LevelFilter, Metadata, Record};
 
 use crate::{
-    arch::timer::Jiffies,
     boot::{kcmdline::ModuleArg, kernel_cmdline},
+    timer::Jiffies,
 };
 
 const LOGGER: Logger = Logger {};
diff --git a/ostd/src/task/scheduler/mod.rs b/ostd/src/task/scheduler/mod.rs
index 5baa619b..016d4853 100644
--- a/ostd/src/task/scheduler/mod.rs
+++ b/ostd/src/task/scheduler/mod.rs
@@ -13,7 +13,7 @@ use core::sync::atomic::{AtomicBool, Ordering};
 use spin::Once;
 
 use super::{preempt::cpu_local, processor, Task};
-use crate::{arch::timer, cpu::PinCurrentCpu, prelude::*, task::disable_preempt};
+use crate::{cpu::PinCurrentCpu, prelude::*, task::disable_preempt, timer};
 
 /// Injects a scheduler implementation into framework.
 ///
diff --git a/ostd/src/arch/x86/timer/jiffies.rs b/ostd/src/timer/jiffies.rs
similarity index 91%
rename from ostd/src/arch/x86/timer/jiffies.rs
rename to ostd/src/timer/jiffies.rs
index 1269ceaa..3b1c1dbf 100644
--- a/ostd/src/arch/x86/timer/jiffies.rs
+++ b/ostd/src/timer/jiffies.rs
@@ -5,7 +5,7 @@ use core::{
     time::Duration,
 };
 
-use super::TIMER_FREQ;
+use crate::arch::timer::TIMER_FREQ;
 
 /// Jiffies is a term used to denote the units of time measurement by the kernel.
 ///
@@ -14,7 +14,7 @@ use super::TIMER_FREQ;
 #[derive(Copy, Clone, Debug)]
 pub struct Jiffies(u64);
 
-pub(super) static ELAPSED: AtomicU64 = AtomicU64::new(0);
+pub(crate) static ELAPSED: AtomicU64 = AtomicU64::new(0);
 
 impl Jiffies {
     /// Creates a new instance.
diff --git a/ostd/src/timer/mod.rs b/ostd/src/timer/mod.rs
new file mode 100644
index 00000000..92cd0859
--- /dev/null
+++ b/ostd/src/timer/mod.rs
@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MPL-2.0
+
+//! The timer support.
+
+pub(crate) mod jiffies;
+
+use alloc::{boxed::Box, vec::Vec};
+use core::cell::RefCell;
+
+pub use jiffies::Jiffies;
+
+use crate::{cpu_local, trap};
+
+type InterruptCallback = Box<dyn Fn() + Sync + Send>;
+
+cpu_local! {
+    pub(crate) static INTERRUPT_CALLBACKS: RefCell<Vec<InterruptCallback>> = RefCell::new(Vec::new());
+}
+
+/// Register a function that will be executed during the system timer interruption.
+pub fn register_callback<F>(func: F)
+where
+    F: Fn() + Sync + Send + 'static,
+{
+    let irq_guard = trap::disable_local();
+    INTERRUPT_CALLBACKS
+        .get_with(&irq_guard)
+        .borrow_mut()
+        .push(Box::new(func));
+}