Hello. I'm now writing the code to make multiboot and bsd work on EFI
based on my grub_machine_memory_iterate for EFI. MY code will be the
same for all i386 branches. It's quite complete except that I had no
time yet to test it. I'l submit once it works
I was thinking and found another utility for badram: BIOS hooks. They
are actually allocating take some memory and then removing it from mmap.
If bios mmap hook and kernels get their mmap from the same source we can
ensure that bios hooks won't be overwritten by the kernel independently
how it acquired memory map. So I think badram patch should be extended
to allow arbitrary additions to mmap.
P.S. sorry if this e-mail isn't clear enough I've just had a long day of
studies
phcoder wrote:
2) when badram variable is set corresponding memory chunks should be
removed from memory manager
3) add a method to specify badram in init.c so that grub2 itself has
no risk of using any of this memory. I propose to embed initial
environment in core.img. Then prefix and root can be changed to use
this mechanism. It would also be able to override this initial
environment through multiboot command line when grub2 is loaded by
multiboot loader
Robert Millan wrote:
Hi,
This patch implements badram filtering in GRUB. It's the same idea
as in
http://rick.vanrein.org/linux/badram/ but applied to GRUB.
The badram module sits between loaders (or other users like lsmmap) and
filters the mmap entries, but only when user previously set the "badram"
variable (whose syntax is the same as the one in badram patch for
Linux).
NOTE this won't affect loadees that get the memory map from BIOS instead
of from GRUB. This means it currently works for Multiboot and for the
new/experimental Linux loader.
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Regards
Vladimir 'phcoder' Serbinenko
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