blob: b0461842b132d840c8e3b69d825bf870808e8044 [file] [log] [blame]
// Copyright 2017 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
use sys_util::EventFd;
use BusDevice;
/// A i8042 PS/2 controller that emulates just enough to shutdown the machine.
pub struct I8042Device {
reset_evt: EventFd,
}
impl I8042Device {
/// Constructs a i8042 device that will signal the given event when the guest requests it.
pub fn new(reset_evt: EventFd) -> I8042Device {
I8042Device { reset_evt: reset_evt }
}
}
impl BusDevice for I8042Device {
fn read(&mut self, offset: u64, data: &mut [u8]) {
if data.len() == 1 && offset == 3 {
data[0] = 0x0;
}
}
fn write(&mut self, offset: u64, data: &[u8]) {
if data.len() == 1 && data[0] == 0xfe && offset == 3 {
if let Err(e) = self.reset_evt.write(1) {
error!("failed to trigger i8042 reset event: {:?}", e);
}
}
}
}