forked from AbleOS/ableos
114 lines
3.6 KiB
Rust
114 lines
3.6 KiB
Rust
use crate::{arch::gdt, print, println};
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use lazy_static::lazy_static;
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use pic8259::ChainedPics;
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use spin;
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use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
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pub const PIC_1_OFFSET: u8 = 32;
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pub const PIC_2_OFFSET: u8 = PIC_1_OFFSET + 8;
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pub static PICS: spin::Mutex<ChainedPics> =
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spin::Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
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/// Interrupt offsets.
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#[derive(Debug, Clone, Copy)]
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#[repr(u8)]
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pub enum InterruptIndex {
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Timer = PIC_1_OFFSET,
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Keyboard,
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}
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impl InterruptIndex {
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fn as_u8(self) -> u8 {
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self as u8
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}
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fn as_usize(self) -> usize {
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usize::from(self.as_u8())
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}
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}
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pub fn init_idt() {
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IDT.load();
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}
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lazy_static! {
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static ref IDT: InterruptDescriptorTable = {
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let mut idt = InterruptDescriptorTable::new();
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idt.breakpoint.set_handler_fn(breakpoint_handler);
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unsafe {
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idt.double_fault.set_handler_fn(double_fault_handler)
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.set_stack_index(gdt::DOUBLE_FAULT_IST_INDEX); // new
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}
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idt[InterruptIndex::Timer.as_usize()].set_handler_fn(timer_interrupt_handler);
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idt[InterruptIndex::Keyboard.as_usize()] .set_handler_fn(keyboard_interrupt_handler);
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idt
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};
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}
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extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame) {
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println!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame);
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}
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// new
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extern "x86-interrupt" fn double_fault_handler(
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stack_frame: InterruptStackFrame,
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_error_code: u64,
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) -> ! {
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panic!("EXCEPTION: DOUBLE FAULT\n{:#?}", stack_frame);
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}
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extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: InterruptStackFrame) {
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crate::kmain::tick();
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unsafe {
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PICS.lock()
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.notify_end_of_interrupt(InterruptIndex::Timer.as_u8());
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}
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}
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extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStackFrame) {
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use crate::keyboard::{
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CustomLayout, CustomScanCodeSet, DecodedKey, DecodedKeyKind, HandleControl, KeyCode,
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Keyboard,
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};
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use spin::Mutex;
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use x86_64::instructions::port::Port;
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lazy_static! {
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static ref KEYBOARD: Mutex<Keyboard<CustomLayout, CustomScanCodeSet>> =
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Mutex::new(Keyboard::new(
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CustomLayout::new_us104key(),
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CustomScanCodeSet::default(),
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HandleControl::Ignore
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));
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}
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let mut keyboard = KEYBOARD.lock();
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let mut port = Port::new(0x60);
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let scancode: u8 = unsafe { port.read() };
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if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
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if let Some(key) = keyboard.process_keyevent(key_event) {
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match key {
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DecodedKey {
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kind: DecodedKeyKind::Unicode,
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value: character,
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} => {
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print!("{}", char::try_from(character).unwrap());
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// serial_print!("{}", character);
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crate::kmain::key_entropy(character.try_into().unwrap());
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}
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DecodedKey {
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kind: DecodedKeyKind::RawKey,
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value: key,
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} => print!("{:?}", KeyCode::from(key)),
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}
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}
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}
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unsafe {
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PICS.lock()
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.notify_end_of_interrupt(InterruptIndex::Keyboard.as_u8());
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}
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}
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/*
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extern "x86-interrupt" fn page_fault_handler(
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stack_frame: InterruptStackFrame,
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error_code: PageFaultErrorCode,
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) {
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use x86_64::registers::control::Cr2;
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println!["Exception: Page Fault"];
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println!["Address: {:?}", Cr2::read()];
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println!["Error Code: {:?}", error_code];
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println!["{:#?}", stack_frame];
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sloop();
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}
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*/
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