SMP and timer interrupts

kernel/amd64/gdt.h

@@ -0,0 +1,29 @@
+#ifndef _KERNEL_AMD64_GDT_H
+#define _KERNEL_AMD64_GDT_H
+
+#include <aux/compiler.h>
+#include <libk/std.h>
+
+#define KSTACK_SIZE (16 * 1024)
+
+struct gdt_entry {
+  uint16_t limitlow;
+  uint16_t baselow;
+  uint8_t basemid;
+  uint8_t access;
+  uint8_t gran;
+  uint8_t basehigh;
+} PACKED;
+
+struct gdt_ptr {
+  uint16_t limit;
+  uint64_t base;
+} PACKED;
+
+struct gdt_extended {
+  struct gdt_entry old[5];
+  struct gdt_entry tsslow;
+  struct gdt_entry tsshigh;
+} PACKED;
+
+#endif // _KERNEL_AMD64_GDT_H