diff --git a/ostd/src/bus/mmio/device.rs b/ostd/src/bus/mmio/device.rs
deleted file mode 100644
index 187b5ab9..00000000
--- a/ostd/src/bus/mmio/device.rs
+++ /dev/null
@@ -1,86 +0,0 @@
-// SPDX-License-Identifier: MPL-2.0
-
-//! MMIO device common definitions or functions.
-
-use int_to_c_enum::TryFromInt;
-use log::info;
-
-use super::VIRTIO_MMIO_MAGIC;
-use crate::{
-    device::io_mem::IoMem,
-    mm::{paddr_to_vaddr, Paddr, VmIo},
-    trap::IrqLine,
-};
-
-/// MMIO Common device.
-/// TODO: Implement universal access to MMIO devices since we are temporarily
-/// using specific virtio device as implementation of CommonDevice.
-#[derive(Debug)]
-pub struct MmioCommonDevice {
-    io_mem: IoMem,
-    irq: IrqLine,
-}
-
-impl MmioCommonDevice {
-    pub(super) fn new(paddr: Paddr, handle: IrqLine) -> Self {
-        // Read magic value
-        // SAFETY: It only read the value and judge if the magic value fit 0x74726976
-        unsafe {
-            debug_assert_eq!(*(paddr_to_vaddr(paddr) as *const u32), VIRTIO_MMIO_MAGIC);
-        }
-        // SAFETY: This range is virtio-mmio device space.
-        let io_mem = unsafe { IoMem::new(paddr..paddr + 0x200) };
-        let res = Self {
-            io_mem,
-            irq: handle,
-        };
-        info!(
-            "[Virtio]: Found Virtio mmio device, device id:{:?}, irq number:{:?}",
-            res.device_id(),
-            res.irq.num()
-        );
-        res
-    }
-
-    /// Base address
-    pub fn address(&self) -> Paddr {
-        self.io_mem.paddr()
-    }
-
-    /// Grants access to the MMIO
-    pub fn io_mem(&self) -> &IoMem {
-        &self.io_mem
-    }
-
-    /// Device ID
-    pub fn device_id(&self) -> u32 {
-        self.io_mem.read_val::<u32>(8).unwrap()
-    }
-
-    /// Version of the MMIO device.
-    ///
-    /// FIXME: This function can only used in Virtio-mmio devices.
-    pub fn version(&self) -> VirtioMmioVersion {
-        VirtioMmioVersion::try_from(self.io_mem.read_val::<u32>(4).unwrap()).unwrap()
-    }
-
-    /// Interrupt line
-    pub fn irq(&self) -> &IrqLine {
-        &self.irq
-    }
-
-    /// Mutable Interrupt line
-    pub fn irq_mut(&mut self) -> &mut IrqLine {
-        &mut self.irq
-    }
-}
-
-/// Virtio MMIO version
-#[derive(Debug, Clone, Copy, TryFromInt, PartialEq, Eq, PartialOrd, Ord)]
-#[repr(u32)]
-pub enum VirtioMmioVersion {
-    /// Legacy
-    Legacy = 1,
-    /// Modern
-    Modern = 2,
-}