This was supposed to be the foundation for some kind of pre-kernel
environment, but nobody is working on it right now, so let's move
everything back into the kernel and remove all the confusion.
Now the DMIDecoder code is more safer, because we don't use raw pointers
or references to objects or data that are located in the physical
address space, so an accidental dereference cannon happen easily.
Instead, we use the PhysicalAddress class to represent those addresses.
Also, the initializer_parser() method is simplified.
As suggested by Joshua, this commit adds the 2-clause BSD license as a
comment block to the top of every source file.
For the first pass, I've just added myself for simplicity. I encourage
everyone to add themselves as copyright holders of any file they've
added or modified in some significant way. If I've added myself in
error somewhere, feel free to replace it with the appropriate copyright
holder instead.
Going forward, all new source files should include a license header.
Structures declarations changed __attribute__((__packed__))
to [[gnu::packed]] in ACPI & DMI definitions.
Also, declarations of array of pointers in ACPI RSDT/XSDT are correct
now. In addition to that, now we have a declaration of the ACPI MADT
table & the table entries.
mmap() & mmap_region() methods are removed from ACPI & DMI components,
and we replace them with the new MM.allocate_kernel_region() helper.
Instead of doing a raw calculation for each VM address, from now on we
can use helper functions to do perform those calculations in a neat,
reusable and readable way.
We use DMI decoding now just to determine if PCI is available.
The DMIDecoder is initialized during early boot, thus making it possible
to probe useful data about the machine.
Other purposes are not supported yet.
