From edf9e71e2a7b6b89775c29cf28c19c6b89992c25 Mon Sep 17 00:00:00 2001
From: aqua <aqua@iserlohn-fortress.net>
Date: Mon, 28 Mar 2022 20:03:38 +0300
Subject: Initial commit

x86 kernel that prints a hello world message to com1
---
 arch/i686/include/sys/io.h | 79 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 arch/i686/include/sys/io.h

(limited to 'arch/i686/include/sys')

diff --git a/arch/i686/include/sys/io.h b/arch/i686/include/sys/io.h
new file mode 100644
index 0000000..74d4950
--- /dev/null
+++ b/arch/i686/include/sys/io.h
@@ -0,0 +1,79 @@
+#pragma once
+
+static inline void
+outb(unsigned char val, unsigned short port)
+{
+  asm volatile("outb %0,%1" : : "a"(val), "dN"(port));
+}
+
+static inline void
+outw(unsigned short val, unsigned short port)
+{
+  asm volatile("outw %0,%1" : : "a"(val), "dN"(port));
+}
+
+static inline void
+outl(unsigned int val, unsigned short port)
+{
+  asm volatile("outl %0,%1" : : "a"(val), "dN"(port));
+}
+
+static inline unsigned char
+inb(unsigned short port)
+{
+  unsigned char val;
+  asm volatile("inb %1,%0" : "=a"(val) : "dN"(port));
+  return val;
+}
+
+static inline unsigned short
+inw(unsigned short port)
+{
+  unsigned short val;
+  asm volatile("inw %1,%0" : "=a"(val) : "dN"(port));
+  return val;
+}
+
+static inline unsigned int
+inl(unsigned short port)
+{
+  unsigned int val;
+  asm volatile("inl %1,%0" : "=a"(val) : "dN"(port));
+  return val;
+}
+
+static inline void
+outsb(unsigned short port, const void *__buf, unsigned long __n)
+{
+  asm volatile("cld; rep; outsb" : "+S"(__buf), "+c"(__n) : "d"(port));
+}
+
+static inline void
+outsw(unsigned short port, const void *__buf, unsigned long __n)
+{
+  asm volatile("cld; rep; outsw" : "+S"(__buf), "+c"(__n) : "d"(port));
+}
+
+static inline void
+outsl(unsigned short port, const void *__buf, unsigned long __n)
+{
+  asm volatile("cld; rep; outsl" : "+S"(__buf), "+c"(__n) : "d"(port));
+}
+
+static inline void
+insb(unsigned short port, void *__buf, unsigned long __n)
+{
+  asm volatile("cld; rep; insb" : "+D"(__buf), "+c"(__n) : "d"(port));
+}
+
+static inline void
+insw(unsigned short port, void *__buf, unsigned long __n)
+{
+  asm volatile("cld; rep; insw" : "+D"(__buf), "+c"(__n) : "d"(port));
+}
+
+static inline void
+insl(unsigned short port, void *__buf, unsigned long __n)
+{
+  asm volatile("cld; rep; insl" : "+D"(__buf), "+c"(__n) : "d"(port));
+}
-- 
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