Distinguish beetwen virtual and physical memory

[the-felis-leo]

Today Memory class handle paging with multiple ByteBuffer.
You could use a single ByteBuffer which itself could handle paging.

The main benefit is to separate primitive and utility methods.

Background idea is porting Zero-assembler OpenJdk into jNodes OS.
Zero could be booted into a ByteBuffer mapping physical memory to build a boot image.

It just an idea, and that is a minor part, there're lot of work to be usefull...
But if anyone is interesting and have some time...