Ivan Tan
12 lines
349 B
Rust
12 lines
349 B
Rust
use crate::time::NANOS_PER_SEC;
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pub fn monotonic_absolute() -> u128 {
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//TODO: aarch64 generic timer counter
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let ticks: usize;
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unsafe { core::arch::asm!("mrs {}, cntpct_el0", out(reg) ticks) };
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let freq: usize;
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unsafe { core::arch::asm!("mrs {}, cntfrq_el0", out(reg) freq) };
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ticks as u128 * NANOS_PER_SEC / freq as u128
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}
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