From c8c0b03b23f2895915a3223f28207db4ca7c3440 Mon Sep 17 00:00:00 2001
From: Gitea <gitea@fake.local>
Date: Fri, 18 Dec 2020 12:39:04 -0600
Subject: [PATCH] Wrote inb and outb for <sys/io.h>

---
 arch/i386/inb.c       | 12 ++++++++++++
 arch/i386/make.config |  2 ++
 arch/i386/outb.c      | 10 ++++++++++
 include/sys/io.h      |  4 +++-
 4 files changed, 27 insertions(+), 1 deletion(-)
 create mode 100644 arch/i386/inb.c
 create mode 100644 arch/i386/outb.c

diff --git a/arch/i386/inb.c b/arch/i386/inb.c
new file mode 100644
index 0000000..7e84684
--- /dev/null
+++ b/arch/i386/inb.c
@@ -0,0 +1,12 @@
+#include <sys/io.h>
+
+/*
+  This was practically copied from musl, but it's 
+  not like there's much there to copy anyways.
+  -Kat
+ */
+unsigned char inb(unsigned short int port) {
+  unsigned short val;
+  __asm__ volatile("inb %1,%0" : "=a" (val) : "dN" (port));
+  return val;
+}
\ No newline at end of file
diff --git a/arch/i386/make.config b/arch/i386/make.config
index fbb211a..580f075 100755
--- a/arch/i386/make.config
+++ b/arch/i386/make.config
@@ -4,5 +4,7 @@ KERNEL_ARCH_CFLAGS=
 KERNEL_ARCH_CPPFLAGS=
 
 ARCH_FREEOBJS=\
+$(ARCHDIR)/inb.o \
+$(ARCHDIR)/outb.o
 
 ARCH_HOSTEDOBJS=\
\ No newline at end of file
diff --git a/arch/i386/outb.c b/arch/i386/outb.c
new file mode 100644
index 0000000..551356c
--- /dev/null
+++ b/arch/i386/outb.c
@@ -0,0 +1,10 @@
+#include <sys/io.h>
+
+/*
+  This was also practically lifted
+  from musl.
+  -Kat
+ */
+void outb(unsigned char val, unsigned short port) {
+  __asm__ volatile("outb %0,%1" : : "a" (val), "dN" (port));
+}
\ No newline at end of file
diff --git a/include/sys/io.h b/include/sys/io.h
index 9b7cb1e..d738dae 100644
--- a/include/sys/io.h
+++ b/include/sys/io.h
@@ -12,6 +12,8 @@
 #ifndef _SYS_IO_H
 #define _SYS_IO_H
 
-extern unsigned char inb(unsigned short int port);
+unsigned char inb(unsigned short int port);
+
+void outb(unsigned char val, unsigned short port);
 
 #endif