1 files changed, 0 insertions, 43 deletions
diff --git a/kernel/src/drivers/riscv_timer.rs b/kernel/src/drivers/riscv_timer.rs
deleted file mode 100644
index a702f7b..0000000
--- a/kernel/src/drivers/riscv_timer.rs
+++ /dev/null
@@ -1,43 +0,0 @@
-use core::{arch::asm, ops::Add, time::Duration};
-
-/// The number of `Instant` "ticks" in a second. Initialized by the early-boot DeviceTree parser.
-pub static mut TIMEBASE_FREQUENCY: u32 = 0;
-
-/// A moment in time.
-#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
-pub struct Instant(u64);
-
-impl Instant {
-    /// Returns the current time as an `Instant`.
-    pub fn now() -> Instant {
-        let out;
-        // SAFETY: We require the Sstc extension, enable it before jumping to Rust, and never
-        // disable it.
-        unsafe {
-            asm!("rdtime {out}", out = out(reg) out, options(nomem, nostack));
-        }
-        Instant(out)
-    }
-}
-
-impl Add<Duration> for Instant {
-    type Output = Instant;
-
-    #[allow(clippy::suspicious_arithmetic_impl)]
-    fn add(self, duration: Duration) -> Instant {
-        // SAFETY: TIMEBASE_FREQUENCY is never concurrently written to.
-        let ticks_per_second = unsafe { TIMEBASE_FREQUENCY };
-        let ticks = duration.as_nanos().wrapping_mul(ticks_per_second as u128) / 1_000_000_000;
-        Instant(self.0.wrapping_add(ticks as u64))
-    }
-}
-
-/// Sets the timer interrupt to fire at the given instant. Note that this sets a global value,
-/// rather than interacting with the scheduler in any way.
-pub fn set_timer(instant: Instant) {
-    // SAFETY: We require the Sstc extension, enable it before jumping to Rust, and never
-    // disable it.
-    unsafe {
-        asm!("csrw stimecmp, {instant}", instant = in(reg) instant.0, options(nomem, nostack));
-    }
-}