From 0ad16863bad8a9fbfa8da5db39ce2a7b6679569e Mon Sep 17 00:00:00 2001
From: starnakin <camille@chauvet.pro>
Date: Sat, 7 Sep 2024 13:06:54 +0200
Subject: [PATCH] add: inb, outb

---
 headers/sys/io.h  |  4 ++++
 src/sys/io/inb.c  | 10 ++++++++++
 src/sys/io/outb.c |  4 ++++
 3 files changed, 18 insertions(+)
 create mode 100644 headers/sys/io.h
 create mode 100644 src/sys/io/inb.c
 create mode 100644 src/sys/io/outb.c

diff --git a/headers/sys/io.h b/headers/sys/io.h
new file mode 100644
index 0000000..16724da
--- /dev/null
+++ b/headers/sys/io.h
@@ -0,0 +1,4 @@
+#pragma once
+
+inline uint8_t inb(uint16_t port);
+inline void outb(uint16_t port, uint8_t val);
\ No newline at end of file
diff --git a/src/sys/io/inb.c b/src/sys/io/inb.c
new file mode 100644
index 0000000..efba1f0
--- /dev/null
+++ b/src/sys/io/inb.c
@@ -0,0 +1,10 @@
+
+inline uint8_t inb(uint16_t port)
+{
+    uint8_t ret;
+    __asm__ volatile ( "inb %w1, %b0"
+                   : "=a"(ret)
+                   : "Nd"(port)
+                   : "memory");
+    return ret;
+}
\ No newline at end of file
diff --git a/src/sys/io/outb.c b/src/sys/io/outb.c
new file mode 100644
index 0000000..cb3d773
--- /dev/null
+++ b/src/sys/io/outb.c
@@ -0,0 +1,4 @@
+inline void outb(uint16_t port, uint8_t val)
+{
+    __asm__ volatile ( "outb %b0, %w1" : : "a"(val), "Nd"(port) : "memory");
+}
\ No newline at end of file