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#![allow(dead_code)]
#![allow(unused_imports)]
#![no_std]
#![no_main]
#![feature(const_option)]
mod arch;
mod defs;
mod ds;
mod io;
mod machine;
mod mm;
use crate::machine::key::Modifiers;
mod proc;
use arch::x86_64::interrupt;
use arch::x86_64::interrupt::pic_8259;
use arch::x86_64::interrupt::pic_8259::PicDeviceInt;
use core::panic::PanicInfo;
use defs::*;
use machine::cgascr::CGAScreen;
use machine::multiboot;
#[cfg(not(test))]
#[panic_handler]
fn panic(info: &PanicInfo) -> ! {
println!("{}", info);
loop {}
}
#[no_mangle]
pub extern "C" fn _entry() -> ! {
// init code
io::set_attr(0x1f);
io::clear_screen();
assert!(multiboot::check(), "bad multiboot info from grub!");
let mbi = multiboot::get_mb_info().expect("bad multiboot info flags");
let mem = unsafe { mbi.get_mem() }.unwrap();
println!(
"[init] available memory: lower {:#X} KiB, upper:{:#X} KiB",
mem.lower(),
mem.upper()
);
mm::init();
interrupt::init();
pic_8259::allow(PicDeviceInt::KEYBOARD);
interrupt::interrupt_enable();
println!(
"[init] kernel mapped @ {:#X} - {:#X}",
vmap_kernel_start(),
vmap_kernel_end(),
);
println!(
"[init] BSS mapped @ {:#X} - {:#X}",
bss_start(),
bss_end()
);
// io::print_welcome();
// busy loop query keyboard
loop {
io::KBCTL_GLOBAL.lock().fetch_key();
if let Some(k) = io::KBCTL_GLOBAL.lock().consume_key() {
println! {"key: {:?}", k}
}
}
}
pub unsafe fn _test_pf() {
// try a page fault
use core::arch::asm;
use core::slice;
let name_buf = slice::from_raw_parts_mut(0xffffffffffff0000 as *mut u64, 10);
asm!("mov [rdi], rax", in("rdi") name_buf.as_mut_ptr());
}
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