From d83a4444e5b8765d2729ed474587196ebe3ec8d4 Mon Sep 17 00:00:00 2001
From: Ben <playsplane@gmail.com>
Date: Thu, 25 Apr 2019 08:57:40 +0100
Subject: [PATCH] Kernel IO

---
 kernel/kernio.cpp | 13 +++++++++++++
 kernel/kernio.h   |  4 ++++
 2 files changed, 17 insertions(+)
 create mode 100644 kernel/kernio.cpp
 create mode 100644 kernel/kernio.h

diff --git a/kernel/kernio.cpp b/kernel/kernio.cpp
new file mode 100644
index 0000000..a968f1e
--- /dev/null
+++ b/kernel/kernio.cpp
@@ -0,0 +1,13 @@
+#include "kernio.h"
+
+inline void outb(uint16_t port, uint8_t b) {
+    asm("outb %0, %1" : : "a"(b), "Nd"(port));
+}
+
+inline uint8_t inb(uint16_t port) {
+    uint8_t ret;
+    asm volatile ( "inb %1, %0"
+                   : "=a"(ret)    // Output
+                   : "Nd"(port)); // Input
+    return ret;
+}
diff --git a/kernel/kernio.h b/kernel/kernio.h
new file mode 100644
index 0000000..0d37f00
--- /dev/null
+++ b/kernel/kernio.h
@@ -0,0 +1,4 @@
+#include <lib/stdint.h>
+
+inline void outb(uint16_t port, uint8_t b);
+inline uint8_t inb(uint16_t port);