ided: Use pause instruction instead of yield_now when waiting for status

2022-09-07 16:14:56 -06:00
parent a7848cc079
commit 4fe7733cad
1 changed files with 13 additions and 2 deletions
@@ -1,6 +1,5 @@
 use std::{
    sync::{Arc, Mutex},
-    thread,
 };
 use syscall::{
    error::{Error, Result, EIO},
@@ -9,6 +8,18 @@ use syscall::{

 use crate::ata::AtaCommand;

+#[cfg(target_arch = "aarch64")]
+#[inline(always)]
+pub(crate) unsafe fn pause() { std::arch::aarch64::__yield(); }
+
+#[cfg(target_arch = "x86")]
+#[inline(always)]
+pub(crate) unsafe fn pause() { std::arch::x86::_mm_pause(); }
+
+#[cfg(target_arch = "x86_64")]
+#[inline(always)]
+pub(crate) unsafe fn pause() { std::arch::x86_64::_mm_pause(); }
+
 pub struct Channel {
    pub data8: Pio<u8>,
    pub data32: Pio<u32>,
@@ -70,7 +81,7 @@ impl Channel {
        }

        while self.status.readf(0x80) {
-            thread::yield_now();
+            unsafe { pause(); }
        }

        if check {