1 files changed, 46 insertions, 0 deletions
diff --git a/kernel/include/main/io.h b/kernel/include/main/io.h
new file mode 100644
index 0000000..19c6f86
--- /dev/null
+++ b/kernel/include/main/io.h
@@ -0,0 +1,46 @@
+#pragma once
+
+#include "kernel.h"
+#include "types.h"
+
+static inline void outb(uint16_t port, uint8_t val)
+{
+    __asm__ volatile("outb %0,%1" ::"a"(val), "Nd"(port));
+}
+
+static inline uint8_t inb(uint16_t port)
+{
+    uint8_t ret;
+    __asm__ volatile("inb %1,%0"
+                     : "=a"(ret)
+                     : "Nd"(port));
+    return ret;
+}
+
+static inline void outw(uint16_t port, uint16_t val)
+{
+    __asm__ volatile("outw %0,%1" ::"a"(val), "Nd"(port));
+}
+
+static inline uint16_t inw(uint16_t port)
+{
+    uint16_t ret;
+    __asm__ volatile("inw %1,%0"
+                     : "=a"(ret)
+                     : "Nd"(port));
+    return ret;
+}
+
+static inline void outl(uint16_t port, uint32_t val)
+{
+    __asm__ volatile("outl %0,%1" ::"a"(val), "Nd"(port));
+}
+
+static inline uint32_t inl(uint16_t port)
+{
+    uint32_t ret;
+    __asm__ volatile("inl %1,%0"
+                     : "=a"(ret)
+                     : "Nd"(port));
+    return ret;
+}