Hardware Abstraction Layer: initial abstraction of intel x86 specific code

Makefile

@@ -1,6 +1,6 @@
 VERSION=0
 PATCHLEVEL=0
-SUBLEVEL=3
+SUBLEVEL=4
 EXTRAVERSION=-$(shell git rev-parse HEAD | head -c 7)
 
 export VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION

src/arch/i686/mod.rs

@@ -0,0 +1,7 @@
+pub mod gdt;
+pub mod port;
+
+pub fn init()
+{
+	gdt::init();
+}

src/arch/i686/port.rs

@@ -0,0 +1,61 @@
+use core::arch::asm;
+
+#[inline(always)]
+pub fn inb(port: u16) -> u8
+{
+	let ret: u8;
+	unsafe
+	{
+		asm!("in al, dx", out("al") ret, in("dx") port, options(nomem, nostack, preserves_flags));
+	}
+	ret
+}
+
+#[inline(always)]
+pub fn inw(port: u16) -> u16
+{
+	let ret: u16;
+	unsafe
+	{
+		asm!("in ax, dx", out("ax") ret, in("dx") port, options(nomem, nostack, preserves_flags));
+	}
+	ret
+}
+
+#[inline(always)]
+pub fn ind(port: u16) -> u32
+{
+	let ret: u32;
+	unsafe
+	{
+		asm!("in eax, dx", out("eax") ret, in("dx") port, options(nomem, nostack, preserves_flags));
+	}
+	ret
+}
+
+#[inline(always)]
+pub fn outb(port: u16, value: u8)
+{
+	unsafe
+	{
+		asm!("out dx, al", in("dx") port, in("al") value, options(nomem, nostack, preserves_flags));
+	}
+}
+
+#[inline(always)]
+pub fn outw(port: u16, value: u16)
+{
+	unsafe
+	{
+		asm!("out dx, ax", in("dx") port, in("ax") value, options(nomem, nostack, preserves_flags));
+	}
+}
+
+#[inline(always)]
+pub fn outd(port: u16, value: u32)
+{
+	unsafe
+	{
+		asm!("out dx, eax", in("dx") port, in("eax") value, options(nomem, nostack, preserves_flags));
+	}
+}

src/arch/initial.rs

@@ -0,0 +1,9 @@
+#[cfg(target_arch = "x86")]
+use super::i686;
+
+#[cfg(target_arch = "x86")]
+#[inline(always)]
+pub fn init()
+{
+	i686::init();
+}

src/arch/mod.rs

@@ -0,0 +1,7 @@
+pub mod initial;
+
+#[cfg(target_arch = "x86")]
+mod i686;
+
+#[cfg(target_arch = "x86")]
+pub use i686::port;

src/elsos.rs

@@ -8,13 +8,13 @@
 use core::panic::PanicInfo;
 use crate::multiboot::{MULTIBOOT_MMAP, MULTIBOOT_MMAP_ENTRIES};
 
+mod arch;
 mod ferramenta;
 mod vga;
 mod keyboard;
 mod tty;
 mod multiboot;
 mod serial;
-mod gdt;
 mod memory;
 mod libc;
 
@@ -38,7 +38,7 @@ pub static mut SETTINGS: Settings = Settings
 #[no_mangle]
 pub extern "C" fn kernel_main(magic: u32, address: u32)
 {
-	gdt::init();
+	arch::initial::init();
 	init_vga();
 	vga::cursor::Cursor::init(0, 15);
 	if multiboot::check_magic(magic) && multiboot::parse(address)

src/ferramenta.rs

@@ -1,42 +1,9 @@
 use core::slice;
-use core::arch::asm;
 use crate::memory;
 
 pub fn shutdown_qemu()
 {
-	outw(0x604, 0x2000);
-}
-
-#[inline(always)]
-pub fn outw(port: u32, value: u16)
-{
-	unsafe
-	{
-		asm!("out dx, ax", in("dx") port, in("ax") value,
-				options(nomem, nostack, preserves_flags));
-	}
-}
-
-#[inline(always)]
-pub fn inb(port: u32) -> u8
-{
-	let ret: u8;
-	unsafe
-	{
-		asm!("in al, dx", out("al") ret, in("dx") port,
-				options(nomem, nostack, preserves_flags));
-	}
-	ret
-}
-
-#[inline(always)]
-pub fn outb(port: u32, value: u8)
-{
-	unsafe
-	{
-		asm!("out dx, al", in("dx") port, in("al") value,
-				options(nomem, nostack, preserves_flags));
-	}
+	crate::arch::port::outw(0x604, 0x2000);
 }
 
 pub fn get_bit_at(input: u32, n: u8) -> bool

src/keyboard/mod.rs

@@ -1,10 +1,10 @@
-use crate::ferramenta;
+use crate::arch;
 use crate::tty;
 
 mod azerty;
 mod qwerty;
 
-const KEYBOARD_DATA: u32 = 0x60;
+const KEYBOARD_DATA: u16 = 0x60;
 const KEYBOARD_READ_STATUS: u32 = 0x64;
 const KEYBOARD_WRITE_COMMAND: u32 = 0x64;
 
@@ -54,7 +54,7 @@ pub fn get_scancodes()
 	let mut scancode: u8 = 0;
 	loop
     {
-		let new_scancode = ferramenta::inb(KEYBOARD_DATA);
+		let new_scancode = arch::port::inb(KEYBOARD_DATA);
 
 		if new_scancode == scancode
 		{

src/serial.rs

@@ -1,5 +1,5 @@
 use core::fmt;
-use crate::ferramenta::{inb, outb};
+use crate::arch::port::{inb, outb};
 
 #[macro_export]
 macro_rules! serial_print
@@ -14,15 +14,15 @@ macro_rules! serial_println
 	($($arg:tt)*) => ($crate::serial_print!("{}\n", format_args!($($arg)*)));
 }
 
-pub const COM1: u32 = 0x3f8;
+pub const COM1: u16 = 0x3f8;
 
-fn check_serial_chip(port: u32) -> bool
+fn check_serial_chip(port: u16) -> bool
 {
 	outb(port, 0xAE);
 	inb(port) == 0xAE
 }
 
-pub fn init(port: u32) -> bool
+pub fn init(port: u16) -> bool
 {
 	unsafe
 	{
@@ -50,18 +50,18 @@ pub fn init(port: u32) -> bool
 	return true;
 }
 
-fn is_transmit_empty(port: u32) -> u8 {
+fn is_transmit_empty(port: u16) -> u8 {
 	return inb(port + 5) & 0x20;
 }
 
-pub fn write(a: u8, port: u32) {
+pub fn write(a: u8, port: u16) {
 	while is_transmit_empty(port) == 0 { }
 	outb(port, a);
 }
 
 struct Serial
 {
-	port: u32,
+	port: u16,
 	pos_x: usize
 }
 

src/vga/cursor.rs

@@ -1,8 +1,8 @@
-use crate::ferramenta::{inb, outb};
+use crate::arch::port::{inb, outb};
 use crate::vga::BUFFER_WIDTH;
 
-const CRT_ADDR_REG: u32 = 0x3D4;
-const CRT_DATA_REG: u32 = 0x3D5;
+const CRT_ADDR_REG: u16 = 0x3D4;
+const CRT_DATA_REG: u16 = 0x3D5;
 
 const CURSOR_START_REG: u8 = 0x0A;
 const CURSOR_END_REG: u8 = 0x0B;