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24 lines
519 B
Rust
24 lines
519 B
Rust
//! RISC-V timer-related functionality
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use crate::config::CLOCK_FREQ;
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use crate::sbi::set_timer;
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use riscv::register::time;
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const TICKS_PER_SEC: usize = 100;
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const MICRO_PER_SEC: usize = 1_000_000;
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/// read the `mtime` register
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pub fn get_time() -> usize {
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time::read()
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}
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/// get current time in microseconds
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pub fn get_time_us() -> usize {
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time::read() / (CLOCK_FREQ / MICRO_PER_SEC)
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}
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/// set the next timer interrupt
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pub fn set_next_trigger() {
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set_timer(get_time() + CLOCK_FREQ / TICKS_PER_SEC);
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}
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