i386: add serial port support

Add support for serial communication in the i386 architecture.

Signed-off-by: Danny Holman <dholman@gymli.xyz>

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/i386/pic.h b/arch/i386/pic.h
new file mode 100644
index 0000000..da4a2ee
--- /dev/null
+++ b/arch/i386/pic.h
@@ -0,0 +1,16 @@
+#ifndef PIC_H
+#define PIC_H
+
+#include <stdint.h>
+
+static inline void outb(uint16_t port, uint8_t value) {
+        asm volatile("outb %0, %1" : : "a"(value), "Nd"(port));
+}
+
+static inline uint8_t inb(uint16_t port) {
+        uint8_t ret;
+        asm volatile("inb %1, %0" : "=a"(ret) : "Nd"(port));
+        return ret;
+}
+
+#endif