//! Architecture support for x86_64

#![feature(asm)]
#![feature(concat_idents)]
#![feature(const_fn)]
#![feature(core_intrinsics)]
#![feature(drop_types_in_const)]
#![feature(lang_items)]
#![feature(naked_functions)]
#![feature(thread_local)]
#![feature(unique)]
#![no_std]

extern crate hole_list_allocator as allocator;

#[macro_use]
extern crate bitflags;
extern crate ransid;
extern crate spin;
pub extern crate x86;

/// Print to console
#[macro_export]
macro_rules! print {
    ($($arg:tt)*) => ({
        use core::fmt::Write;
        let mut console = $crate::console::CONSOLE.lock();
        let _ = write!(console, $($arg)*);
    });
}

/// Print with new line to console
#[macro_export]
macro_rules! println {
    ($fmt:expr) => (print!(concat!($fmt, "\n")));
    ($fmt:expr, $($arg:tt)*) => (print!(concat!($fmt, "\n"), $($arg)*));
}

/// Create an interrupt function that can safely run rust code
#[macro_export]
macro_rules! interrupt {
    ($name:ident, $func:block) => {
        #[naked]
        pub unsafe extern fn $name () {
            #[inline(never)]
            unsafe fn inner() {
                $func
            }

            // Push scratch registers
            asm!("xchg bx, bx
                push rax
                push rcx
                push rdx
                push rdi
                push rsi
                push r8
                push r9
                push r10
                push r11
                push fs
                mov rax, 0x18
                mov fs, ax"
                : : : : "intel", "volatile");

            // Call inner rust function
            inner();

            // Pop scratch registers and return
            asm!("xchg bx, bx
                pop fs
                pop r11
                pop r10
                pop r9
                pop r8
                pop rsi
                pop rdi
                pop rdx
                pop rcx
                pop rax
                iretq"
                : : : : "intel", "volatile");
        }
    };
}

#[macro_export]
macro_rules! interrupt_error {
    ($name:ident, $func:block) => {
        #[naked]
        pub unsafe extern fn $name () {
            #[inline(never)]
            unsafe fn inner() {
                $func
            }

            // Push scratch registers
            asm!("xchg bx, bx
                push rax
                push rcx
                push rdx
                push rdi
                push rsi
                push r8
                push r9
                push r10
                push r11
                push fs
                mov rax, 0x18
                mov fs, ax"
                : : : : "intel", "volatile");

            // Call inner rust function
            inner();

            // Pop scratch registers, error code, and return
            asm!("xchg bx, bx
                pop fs
                pop r11
                pop r10
                pop r9
                pop r8
                pop rsi
                pop rdi
                pop rdx
                pop rcx
                pop rax
                add rsp, 8
                iretq"
                : : : : "intel", "volatile");
        }
    };
}

/// ACPI table parsing
pub mod acpi;

/// Console handling
pub mod console;

/// Context switching
pub mod context;

/// Devices
pub mod device;

/// Memcpy, memmove, etc.
pub mod externs;

/// Global descriptor table
pub mod gdt;

/// Interrupt descriptor table
pub mod idt;

/// IO Handling
pub mod io;

/// Interrupt instructions
pub mod interrupt;

/// Memory management
pub mod memory;

/// Paging
pub mod paging;

/// Panic
pub mod panic;

/// Initialization and start function
pub mod start;