initial commit for EFI platforms

[Yoshinori K. Okuji]

As some people know this, I'm working on Intel Mac these days. I have checked 
in my initial code to the CVS right now. The current code does nearly 
nothing, but simply displays "test!" on the screen. Although this might sound 
bogus, this is a big advance, since the test message proves that my ELF to 
PE32 converter is working fine.

On EFI platforms, I decided to create a kernel as a module (ELF relocatable 
object), and convert it to an EFI Application (PE32 executable). The 
grub-mkimage relocates addresses with the virtual address space which starts 
from zero, and generate relocation entries for PE32 to resolve absolute 
addresses at the loading time. This trick is required because EFI 
Applications must be able to run at an arbitrary address. Pre-loaded modules 
are not supported yet, since this requires memory management which is not 
implemented yet, either.

For my future plan, refer to my wiki page:

http://grub.enbug.org/YoshinoriOkuji

Okuji