kernel/x86_64: LA57 aka 5-level paging

this enables the kernel to correctly take over when the bootloader prepares
the paging in 4-level or 5-level.

Change-Id: I0444486d8e17aade574e2afe255a3c2cfc49f21f
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3551
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Axel Dörfler <axeld@pinc-software.de>

kernel/x86_64: help gcc with devirtualization

This patch gets rid of some indirect calls in the paging code.

Finished implementation of x86_64 paging.

* vm_init now runs up until create_preloaded_image_areas(), which needs
fixing to handle ELF64.
* Not completely tested. I know Map(), Unmap() and Query() work fine, the
other methods have not been tested as the kernel doesn't boot far enough
for any of them to be called yet. As far as I know they're correct, though.
* Not yet implemented the destructor for X86VMTranslationMap64Bit or Init()
for a user address space.

Begun work on VMTranslationMap implementation for x86_64.

* Added empty source files for all the 64-bit paging method code, and a
stub implementation of X86PagingMethod64Bit.
* arch_vm_translation_map.cpp has been modified to use X86PagingMethod64Bit
on x86_64.

kernel/x86_64: help gcc with devirtualization

This patch gets rid of some indirect calls in the paging code.

Finished implementation of x86_64 paging.

* vm_init now runs up until create_preloaded_image_areas(), which needs
fixing to handle ELF64.
* Not completely tested. I know Map(), Unmap() and Query() work fine, the
other methods have not been tested as the kernel doesn't boot far enough
for any of them to be called yet. As far as I know they're correct, though.
* Not yet implemented the destructor for X86VMTranslationMap64Bit or Init()
for a user address space.

Begun work on VMTranslationMap implementation for x86_64.

* Added empty source files for all the 64-bit paging method code, and a
stub implementation of X86PagingMethod64Bit.
* arch_vm_translation_map.cpp has been modified to use X86PagingMethod64Bit
on x86_64.