Commit f90af704 authored by Stefan Lankes's avatar Stefan Lankes Committed by Stefan Lankes
Browse files

Revert "add check if the wakeup time isn't already expired"

This reverts commit 6be9da0a37f1715778b6b7ea53c641963125555f.
parent e611f21c
......@@ -437,19 +437,12 @@ fn calibrate_timer() {
}
pub fn set_oneshot_timer(wakeup_time: Option<u64>) {
const MINIMUM_DELAY: u64 = 1000; // in usec
if let Some(wt) = wakeup_time {
if processor::supports_tsc_deadline() {
// wt is the absolute wakeup time in microseconds based on processor::get_timer_ticks.
// We can simply multiply it by the processor frequency to get the absolute Time-Stamp Counter deadline
// (see processor::get_timer_ticks).
let current_time = processor::get_timer_ticks();
let tsc_deadline = if wt >= current_time + MINIMUM_DELAY {
wt * u64::from(processor::get_frequency())
} else {
(current_time + MINIMUM_DELAY) * u64::from(processor::get_frequency())
};
let tsc_deadline = wt * (u64::from(processor::get_frequency()));
// Enable the APIC Timer in TSC-Deadline Mode and let it start by writing to the respective MSR.
local_apic_write(
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment