mirror of https://github.com/vinc/moros.git
75 lines
2.2 KiB
Rust
75 lines
2.2 KiB
Rust
use crate::{print, kernel};
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use lazy_static::lazy_static;
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use pic8259_simple::ChainedPics;
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use spin::Mutex;
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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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#[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 = PIC_1_OFFSET + 1
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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 static PICS: Mutex<ChainedPics> = Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
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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).set_stack_index(kernel::gdt::DOUBLE_FAULT_IST_INDEX);
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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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pub fn init_idt() {
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IDT.load();
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}
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extern "x86-interrupt" fn breakpoint_handler(stack_frame: &mut InterruptStackFrame) {
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print!("EXCEPTION: BREAKPOINT\n{:#?}\n", stack_frame);
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}
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extern "x86-interrupt" fn double_fault_handler(stack_frame: &mut InterruptStackFrame, _error_code: u64) -> ! {
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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: &mut InterruptStackFrame) {
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kernel::clock::tick();
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unsafe {
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PICS.lock().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: &mut InterruptStackFrame) {
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let mut keyboard = kernel::keyboard::KEYBOARD.lock();
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let scancode = kernel::keyboard::read_scancode();
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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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kernel::console::key_handle(key);
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}
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}
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unsafe {
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PICS.lock().notify_end_of_interrupt(InterruptIndex::Keyboard.as_u8());
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}
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}
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