FantasyPvP
111 lines
2.5 KiB
Rust
111 lines
2.5 KiB
Rust
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use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
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use crate::println;
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use super::gdt;
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use lazy_static::lazy_static;
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use spin;
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use pic8259::ChainedPics;
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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: InterruptStackFrame) {
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println!("EXCEPTION: breakpoint\n{:#?}", stack_frame);
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}
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extern "x86-interrupt" fn double_fault_handler(stack_frame: 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: InterruptStackFrame) {
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unsafe {
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GLOBALTIMER.lock().inc();
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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: InterruptStackFrame) {
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use pc_keyboard::{layouts, HandleControl, Keyboard, ScancodeSet1};
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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<layouts::Uk105Key, ScancodeSet1>> = {
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Mutex::new(Keyboard::new(layouts::Uk105Key, ScancodeSet1, HandleControl::Ignore))
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};
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}
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let _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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super::tasks::keyboard::add_scancode(scancode);
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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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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);
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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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lazy_static! {
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pub static ref GLOBALTIMER: spin::Mutex<Timer> = spin::Mutex::new(Timer::new());
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}
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pub struct Timer {
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pub val: i64
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}
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impl Timer {
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pub fn new() -> Self {
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Self { val: 0 }
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}
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pub fn inc(&mut self) {
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self.val += 1
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}
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pub fn clear(&mut self) {
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self.val = 0
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}
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}
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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> = spin::Mutex::new( unsafe {
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ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET)
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});
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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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