Up to now, the page frame allocator's
initialization routine relied on the fact that
map_page() never needs to get new pages on i386 if
the mapped page is a hugepage. This is not at all
true on other architectures, however.
This also includes a minor refactor of everything,
as well as some optimizations. The bitmap
operations have been moved into a separate file
because they are probably gonna come in handy in
other parts of the system as well.
This is part of a series of commits where i
completely rewrite kmalloc() because it needs to
be able to return physically contiguous memory for
DMA operations.
Yes, i know the build isn't working right now.
Now that memory allocation finally kind of works,
we can finally start focusing on the core system
architecture. This commit also fixes some bugs in
get_page() and friends, as well as performance
improvements because the page map is addressed as
unsigned longs rather than individual bytes.
