root/arch/x86/realmode/rm/

[..]
  1. bioscall.S
  2. copy.S
  3. header.S
  4. realmode.h
  5. realmode.lds.S
  6. reboot.S
  7. regs.c
  8. stack.S
  9. trampoline_32.S
  10. trampoline_64.S
  11. trampoline_common.S
  12. video-bios.c
  13. video-mode.c
  14. video-vesa.c
  15. video-vga.c
  16. wakemain.c
  17. wakeup.h
  18. wakeup_asm.S
[..]