From f398efa1ac52e967d9673a0efebd9a27f17d60bf Mon Sep 17 00:00:00 2001
From: aqua <aqua@iserlohn-fortress.net>
Date: Sun, 11 Dec 2022 21:42:29 +0200
Subject: Generate docs using doxygen instead of sphinx

---
 i686/sys/io.hpp | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

(limited to 'i686')

diff --git a/i686/sys/io.hpp b/i686/sys/io.hpp
index bea9323..9759a3a 100644
--- a/i686/sys/io.hpp
+++ b/i686/sys/io.hpp
@@ -1,15 +1,33 @@
 #pragma once
 
+/**
+ * Ports provide communication with devices on the x86 IO bus.
+ */
 template <typename T, unsigned short port> struct Port {
-  static void
-  out(T val, unsigned short offset = 0)
+  /**
+   * Read value from port
+   */
+  static T
+  in(unsigned short offset = 0)
   {
-    outb(val, port + offset);
+    if constexpr (sizeof(T) == sizeof(unsigned char)) return inb(port + offset);
+    else if constexpr (sizeof(T) == sizeof(unsigned short))
+      return inw(port + offset);
+    else if constexpr (sizeof(T) == sizeof(unsigned int))
+      return inl(port + offset);
   }
 
-  static auto
-  in(unsigned short offset = 0)
+  /**
+   * Write value to port
+   */
+  static void
+  out(T val, unsigned short offset = 0)
   {
-    return inb(port + offset);
+    if constexpr (sizeof(T) == sizeof(unsigned char)) outb(val, port + offset);
+    else if constexpr (sizeof(T) == sizeof(unsigned short))
+      outw(val, port + offset);
+    else if constexpr (sizeof(T) == sizeof(unsigned int))
+      outl(val, port + offset);
   }
+
 };
-- 
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