On 18/07/16 02:39, james harvey wrote:
I hope I'm wrong here, but I think there needs to be an additional
kernel module to allow SRP booting. Has no one done this yet, booted
linux by SRP, or am I off somewhere?
I do have a program that can search a given 640k area, and find and
parse a sBFT. (Probably needs a tweak or two once I'm running it on
what iPXE leaves behind, rather than the test structures I'm randomly
making and randomly placing.)
Now that I'm at the point of wanting to try it during boot, I realized
what I should have earlier - I don't think there's any way for my
program to access the sBFT.
You should be able to mmap() /dev/mem, which will give you access to the
low 1MB of physical address space from a userspace program. The sBFT
will be preserved within this region.
Michael
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