chore: reorganize file directories

We have reorganized all the file directories that previously looked ugly as hell (cough cough arch/x86_64 cough)

Now it looks much cleaner

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

src/arch/x86_64/boot/gdt.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <stdint.h>
+#include <stddef.h>
+
+
+
+#define GDT_KERNEL_BASE 0x0
+#define GDT_KERNEL_CODE64 0x8
+#define GDT_KERNEL_DATA64 0x10
+#define GDT_USER_BASE 0x18
+#define GDT_USER_DATA64 0x18
+#define GDT_USER_CODE64 0x20
+#define GDT_TSS         0x28
+
+struct tss {
+	uint32_t reserved;
+	uint64_t rsp0;
+	uint64_t rsp1;
+	uint64_t rsp2;
+	uint64_t reserved2;
+	uint64_t ist1;
+	uint64_t ist2;
+	uint64_t ist3;
+	uint64_t ist4;
+	uint64_t ist5;
+	uint64_t ist6;
+	uint64_t ist7;
+	uint64_t reserved3;
+	uint16_t reserved4;
+	uint16_t iomap_base;
+} __attribute__((packed));
+
+extern struct tss kernel_tss;
+
+void x86_64_GDT_Initialize(void);
+void gdt_load_tss(size_t addr);