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Add support for keyboard interrupts

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This commit is contained in:
Yash Karandikar 2021-09-16 12:25:15 -05:00
parent 880e840ac5
commit 8257d42a6c
1 changed files with 31 additions and 1 deletions
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32
src/interrupts.rs
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@ -16,6 +16,8 @@ lazy_static! {
}
idt[InterruptIndex::Timer.as_usize()]
.set_handler_fn(timer_interrupt_handler);
idt[InterruptIndex::Keyboard.as_usize()]
.set_handler_fn(keyboard_interrupt_handler);
idt
};
}
@ -42,6 +44,33 @@ extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: InterruptStackFr
}
}
extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStackFrame) {
use x86_64::instructions::port::Port;
let mut port = Port::new(0x60);
let scancode: u8 = unsafe { port.read() };
let key = match scancode {
0x02 => Some('1'),
0x03 => Some('2'),
0x04 => Some('3'),
0x05 => Some('4'),
0x06 => Some('5'),
0x07 => Some('6'),
0x08 => Some('7'),
0x09 => Some('8'),
0x0a => Some('9'),
0x0b => Some('0'),
_ => None,
};
if let Some(key) = key {
print!("{}", key);
}
unsafe {
PICS.lock().notify_end_of_interrupt(InterruptIndex::Keyboard.as_u8());
}
}
pub const PIC_1_OFFSET: u8 = 32;
pub const PIC_2_OFFSET: u8 = PIC_1_OFFSET + 8;
@ -50,7 +79,8 @@ pub static PICS: Mutex<ChainedPics> = Mutex::new(unsafe { ChainedPics::new(PIC_1
#[derive(Debug, Clone, Copy)]
#[repr(u8)]
pub enum InterruptIndex {
Timer = PIC_1_OFFSET
Timer = PIC_1_OFFSET,
Keyboard
}
impl InterruptIndex {