Initial commit

kernel/arch/x86_64/include/bits/percpu.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <gdt.h>
+#include <stdint.h>
+
+static inline struct percpu* arch_percpu_get() {
+    struct percpu* result;
+    asm volatile("mov %0, gs:0" : "=r"(result)::"memory");
+    return result;
+}
+
+struct arch_percpu {
+    uint32_t lapic_id;
+    struct gdt gdt;
+    struct tss tss;
+};