131 lines
4.4 KiB
Rust
131 lines
4.4 KiB
Rust
use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
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use crate::println;
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use crate::print;
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use lazy_static::lazy_static;
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use crate::gdt;
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use pic8259::ChainedPics;
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use spin::Mutex;
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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()]
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.set_handler_fn(timer_interrupt_handler);
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idt[InterruptIndex::Keyboard.as_usize()]
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.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() {
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IDT.load();
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unsafe { PICS.lock().initialize() };
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x86_64::instructions::interrupts::enable();
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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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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 x86_64::instructions::port::Port;
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use pc_keyboard::{layouts, DecodedKey, KeyCode, HandleControl, Keyboard, ScancodeSet1};
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lazy_static! {
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static ref KEYBOARD: Mutex<Keyboard<layouts::Us104Key, ScancodeSet1>> = {
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Mutex::new(Keyboard::new(layouts::Us104Key, ScancodeSet1, 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::Unicode(character) => {
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if character == '\u{8}' {
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crate::vga_buffer::backspace();
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} else if character == '\u{9}' {
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print!(" ");
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} else {
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print!("{}", character)
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}
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let writer = crate::vga_buffer::WRITER.lock();
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let col = writer.column_position;
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let row = crate::vga_buffer::BUFFER_HEIGHT - 1;
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crate::vga_buffer::move_cursor(col as u16, row as u16);
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},
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DecodedKey::RawKey(key) => {
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match key {
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// TODO
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KeyCode::ArrowLeft => {
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let mut writer = crate::vga_buffer::WRITER.lock();
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let col = writer.column_position;
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let row = crate::vga_buffer::BUFFER_HEIGHT - 1;
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if col != 0 {
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crate::vga_buffer::move_cursor((col as u16) - 1, row as u16);
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writer.column_position -= 1;
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}
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},
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KeyCode::ArrowRight => {
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let mut writer = crate::vga_buffer::WRITER.lock();
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let col = writer.column_position;
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let row = crate::vga_buffer::BUFFER_HEIGHT - 1;
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crate::vga_buffer::move_cursor((col as u16) + 1, row as u16);
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writer.column_position += 1;
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},
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_ => {}
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}
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},
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}
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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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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: Mutex<ChainedPics> = Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
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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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