moving kernel code to kernel/

docs/halting.md

@@ -16,7 +16,7 @@ safely, until the machine is reset or powered off.
 ## The core of it: `hlt`
 
 Everything comes down to one x86 instruction. It's CPU-specific, so it lives in
-the arch module, `src/arch/x86_64/cpu.zig` (see [arch.md](arch.md)), and the
+the arch module, `src/kernel/arch/x86_64/cpu.zig` (see [arch.md](arch.md)), and the
 generic kernel calls it as `arch.halt()`:
 
 ```zig
@@ -83,7 +83,7 @@ treats the call:
   signature for a kernel entry point — the bootloader jumps in and nothing ever
   jumps back out.
 
-You can see the chain in `src/main.zig`: `_start` is `noreturn`, it calls
+You can see the chain in `src/kernel/main.zig`: `_start` is `noreturn`, it calls
 `kmain` which is `noreturn`, which ends by calling `arch.halt()` which is
 `noreturn`. The "never returns" property is threaded all the way down.