higher-half stub kernel does the thing

1 files changed, 14 insertions, 0 deletions

diff --git a/kernel/port.c b/kernel/port.c
new file mode 100644
index 0000000..17af396
--- /dev/null
+++ b/kernel/port.c
@@ -0,0 +1,14 @@
+#include "port.h"
+
+uint8_t inb(uint16_t port)
+{
+    uint8_t data;
+    __asm__ ("inb %1, %0" : "=a"(data) : "d"(port));
+    return data;
+}
+
+void outb(uint16_t port, uint8_t data)
+{
+    __asm__ ("outb %0, %1" :: "a"(data), "d"(port));
+}
+