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kernel/include/io/ports.h

@@ -0,0 +1,40 @@
+#ifndef PORTS_H
+#define PORTS_H
+
+#include <stdint.h>
+
+static inline uint8_t inb(uint16_t port) {
+    uint8_t result;
+    asm volatile ("inb %1, %0" : "=a"(result) : "Nd"(port));
+    return result;
+}
+
+static inline void outb(uint16_t port, uint8_t data) {
+    asm volatile ("outb %0, %1" : : "a"(data), "Nd"(port));
+}
+
+static inline uint16_t inw(uint16_t port) {
+    uint16_t result;
+    asm volatile ("inw %1, %0" : "=a"(result) : "Nd"(port));
+    return result;
+}
+
+static inline void outw(uint16_t port, uint16_t data) {
+    asm volatile ("outw %0, %1" : : "a"(data), "Nd"(port));
+}
+
+static inline uint32_t inl(uint16_t port) {
+    uint32_t result;
+    asm volatile ("inl %1, %0" : "=a"(result) : "Nd"(port));
+    return result;
+}
+
+static inline void outl(uint16_t port, uint32_t data) {
+    asm volatile ("outl %0, %1" : : "a"(data), "Nd"(port));
+}
+
+static inline void io_wait(void) {
+    outb(0x80, 0);
+}
+
+#endif