Function decode_irq_from_selector

devices/src/ioapic.rs:122–127

Given an offset that was read from/written to, return a tuple of the relevant IRQ and whether the offset refers to the high bits of that register.

(selector: u8)

/// Given an offset that was read from/written to, return a tuple of the relevant IRQ and whether
/// the offset refers to the high bits of that register.
fn decode_irq_from_selector(selector: u8) -> (usize, bool) {
    (
        ((selector - IOWIN_OFF) / IOWIN_SCALE) as usize,
        selector & 1 != 0,
    )
}

pub struct Ioapic {
    id: String,