Initial commit

1 files changed, 26 insertions, 0 deletions

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));
+}