From 9b8698769535846d029c44247956eed9a21f1185 Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 4 Jul 2021 21:31:28 +0200
Subject: Initial commit

---
 src/loader/cpu.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/loader/cpu.c

(limited to 'src/loader/cpu.c')

diff --git a/src/loader/cpu.c b/src/loader/cpu.c
new file mode 100644
index 0000000..a12d2fa
--- /dev/null
+++ b/src/loader/cpu.c
@@ -0,0 +1,26 @@
+// MIT License, Copyright (c) 2021 Marvin Borner
+
+#include <cpu.h>
+
+/**
+ * CPU IO
+ */
+
+u8 inb(u16 port)
+{
+	u8 value;
+	__asm__ volatile("inb %1, %0" : "=a"(value) : "Nd"(port));
+	return value;
+}
+
+u16 inw(u16 port)
+{
+	u16 value;
+	__asm__ volatile("inw %1, %0" : "=a"(value) : "Nd"(port));
+	return value;
+}
+
+void outb(u16 port, u8 data)
+{
+	__asm__ volatile("outb %0, %1" ::"a"(data), "Nd"(port));
+}
-- 
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