Rename the src directory to kernel.

kernel/arch/x86_64/mod.rs

@@ -0,0 +1,25 @@
+//! X86_64 architecture primitives.
+
+/// Global descriptor table.
+pub mod gdt;
+
+/// Interrupt descriptor table.
+pub mod idt;
+
+/// IO handling.
+pub mod io;
+
+/// IRQ handling.
+pub mod irq;
+
+/// Initialization and main function.
+pub mod main;
+
+/// Core memory routines.
+pub mod mem;
+
+/// Serial driver and `print!` support.
+pub mod serial;
+
+/// Task state segment.
+pub mod tss;