Implemented some basic libc functions and a text console

arch/x86_64/ports.c

@@ -0,0 +1,39 @@
+#include <stdint.h>
+
+uint8_t inportb(uint16_t port) {
+    uint8_t data;
+    asm volatile("inb %1, %0" : "=a"(data) : "dN"(port));
+    return data;
+}
+
+void outportb(uint16_t port, uint8_t data) {
+    asm volatile("outb %1, %0" : : "dN"(port), "a"(data));
+}
+
+uint16_t inportw(uint16_t port) {
+    uint16_t data;
+    asm volatile("inw %1, %0" : "=a"(data) : "dN"(port));
+    return data;
+}
+
+void outportw(uint16_t port, uint16_t data) {
+    asm volatile("outw %1, %0" : : "dN"(port), "a"(data));
+}
+
+uint32_t inportl(uint16_t port) {
+    uint32_t data;
+    asm volatile("inl %%dx, %%eax" : "=a"(data) : "dN"(port));
+    return data;
+}
+
+void outportl(uint16_t port, uint32_t data) {
+    asm volatile("outl %%eax, %%dx" : : "dN"(port), "a"(data));
+}
+
+void outportsw(uint16_t port, void *data, uint32_t size) {
+    asm volatile("rep outsw" : "+S"(data), "+c"(size) : "d"(port));
+}
+
+void inportsw(uint16_t port, unsigned char *data, unsigned long size) {
+    asm volatile("rep insw" : "+D"(data), "+c"(size) : "d"(port) : "memory");
+}