145 lines
5.1 KiB
Rust
145 lines
5.1 KiB
Rust
use x86_64::structures::idt::{InterruptDescriptorTable, InterruptStackFrame};
|
|
use crate::println;
|
|
use crate::print;
|
|
use lazy_static::lazy_static;
|
|
use crate::gdt;
|
|
use pic8259::ChainedPics;
|
|
use spin::Mutex;
|
|
|
|
|
|
lazy_static! {
|
|
static ref IDT: InterruptDescriptorTable = {
|
|
let mut idt = InterruptDescriptorTable::new();
|
|
idt.breakpoint.set_handler_fn(breakpoint_handler);
|
|
unsafe {
|
|
idt.double_fault.set_handler_fn(double_fault_handler)
|
|
.set_stack_index(gdt::DOUBLE_FAULT_IST_INDEX);
|
|
}
|
|
idt[InterruptIndex::Timer.as_usize()]
|
|
.set_handler_fn(timer_interrupt_handler);
|
|
idt[InterruptIndex::Keyboard.as_usize()]
|
|
.set_handler_fn(keyboard_interrupt_handler);
|
|
idt
|
|
};
|
|
}
|
|
|
|
pub fn init() {
|
|
IDT.load();
|
|
unsafe { PICS.lock().initialize() };
|
|
x86_64::instructions::interrupts::enable();
|
|
}
|
|
|
|
extern "x86-interrupt" fn breakpoint_handler(stack_frame: InterruptStackFrame) {
|
|
println!("EXCEPTION: BREAKPOINT\n{:#?}", stack_frame);
|
|
}
|
|
|
|
extern "x86-interrupt" fn double_fault_handler(stack_frame: InterruptStackFrame, _error_code: u64) -> ! {
|
|
panic!("EXCEPTION : DOUBLE FAULT\n{:#?}", stack_frame);
|
|
}
|
|
|
|
extern "x86-interrupt" fn timer_interrupt_handler(_stack_frame: InterruptStackFrame) {
|
|
unsafe {
|
|
PICS.lock().notify_end_of_interrupt(InterruptIndex::Timer.as_u8());
|
|
}
|
|
}
|
|
|
|
extern "x86-interrupt" fn keyboard_interrupt_handler(_stack_frame: InterruptStackFrame) {
|
|
use x86_64::instructions::port::Port;
|
|
use pc_keyboard::{layouts, DecodedKey, KeyCode, HandleControl, Keyboard, ScancodeSet1};
|
|
|
|
lazy_static! {
|
|
static ref KEYBOARD: Mutex<Keyboard<layouts::Us104Key, ScancodeSet1>> = {
|
|
Mutex::new(Keyboard::new(layouts::Us104Key, ScancodeSet1, HandleControl::Ignore))
|
|
};
|
|
}
|
|
|
|
let mut keyboard = KEYBOARD.lock();
|
|
let mut port = Port::new(0x60);
|
|
|
|
let scancode: u8 = unsafe { port.read() };
|
|
if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
|
|
if let Some(key) = keyboard.process_keyevent(key_event) {
|
|
match key {
|
|
DecodedKey::Unicode(character) => {
|
|
if character == '\u{8}' {
|
|
crate::vga_buffer::backspace();
|
|
} else if character == '\u{9}' {
|
|
print!(" ");
|
|
} else if character == '\n' {
|
|
use arrayvec::ArrayString;
|
|
let writer = crate::vga_buffer::WRITER.lock();
|
|
|
|
let mut builder = ArrayString::<80>::new();
|
|
for character in &writer.buffer.chars[crate::vga_buffer::BUFFER_HEIGHT - 1] {
|
|
builder.push(character.read().ascii_character as char);
|
|
}
|
|
|
|
unsafe {
|
|
crate::vga_buffer::WRITER.force_unlock();
|
|
}
|
|
crate::shell::evaluate(&builder);
|
|
} else {
|
|
print!("{}", character)
|
|
}
|
|
|
|
let writer = crate::vga_buffer::WRITER.lock();
|
|
let col = writer.column_position;
|
|
let row = crate::vga_buffer::BUFFER_HEIGHT - 1;
|
|
|
|
crate::vga_buffer::move_cursor(col as u16, row as u16);
|
|
},
|
|
DecodedKey::RawKey(key) => {
|
|
match key {
|
|
// TODO
|
|
KeyCode::ArrowLeft => {
|
|
let mut writer = crate::vga_buffer::WRITER.lock();
|
|
let col = writer.column_position;
|
|
let row = crate::vga_buffer::BUFFER_HEIGHT - 1;
|
|
|
|
if col != 4 {
|
|
crate::vga_buffer::move_cursor((col as u16) - 1, row as u16);
|
|
writer.column_position -= 1;
|
|
}
|
|
},
|
|
KeyCode::ArrowRight => {
|
|
let mut writer = crate::vga_buffer::WRITER.lock();
|
|
let col = writer.column_position;
|
|
let row = crate::vga_buffer::BUFFER_HEIGHT - 1;
|
|
|
|
crate::vga_buffer::move_cursor((col as u16) + 1, row as u16);
|
|
writer.column_position += 1;
|
|
},
|
|
_ => {}
|
|
}
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
pub static PICS: Mutex<ChainedPics> = Mutex::new(unsafe { ChainedPics::new(PIC_1_OFFSET, PIC_2_OFFSET) });
|
|
|
|
#[derive(Debug, Clone, Copy)]
|
|
#[repr(u8)]
|
|
pub enum InterruptIndex {
|
|
Timer = PIC_1_OFFSET,
|
|
Keyboard
|
|
}
|
|
|
|
impl InterruptIndex {
|
|
fn as_u8(self) -> u8 {
|
|
self as u8
|
|
}
|
|
|
|
fn as_usize(self) -> usize {
|
|
usize::from(self.as_u8())
|
|
}
|
|
}
|