Method ioapic_read

devices/src/ioapic.rs:298–324

(&self)

    }

    fn ioapic_read(&self) -> u32 {
        debug!("IOAPIC_R reg 0x{:x}", self.reg_sel);

        match self.reg_sel as u8 {
            IOAPIC_REG_VERSION => IOAPIC_VERSION_ID,
            IOAPIC_REG_ID | IOAPIC_REG_ARBITRATION_ID => (self.id_reg & 0xf) << 24,
            IOWIN_OFF..=REG_MAX_OFFSET => {
                let (index, is_high_bits) = decode_irq_from_selector(self.reg_sel as u8);
                if index > NUM_IOAPIC_PINS {
                    warn!("IOAPIC index out of range: {index}");
                    return 0;
                }
                if is_high_bits {
                    (self.reg_entries[index] >> 32) as u32
                } else {
                    (self.reg_entries[index] & 0xffff_ffff) as u32
                }
            }
            _ => {
                error!(
                    "IOAPIC: invalid read from register offset 0x{:x}",
                    self.reg_sel
                );
                0
            }
        }
    }

    fn state(&self) -> IoapicState {
        IoapicState {