Initial commit

src/kernel/io.h

@@ -0,0 +1,24 @@
+#ifndef IO_H
+#define IO_H
+
+#include <stdint.h>
+
+static inline void outb(uint16_t port, uint8_t val) {
+    asm volatile ("outb %0, %1" : : "a"(val), "Nd"(port));
+}
+
+static inline void outw(uint16_t port, uint16_t val) {
+    asm volatile ("outw %0, %1" : : "a"(val), "Nd"(port));
+}
+
+static inline uint8_t inb(uint16_t port) {
+    uint8_t ret;
+    asm volatile ("inb %1, %0" : "=a"(ret) : "Nd"(port));
+    return ret;
+}
+
+static inline void io_wait(void) {
+    outb(0x80, 0);
+}
+
+#endif