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SubjectRe: RFC: Adding no-BIOS support to Linux?
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> >APM, and several framebuffer drivers (which directly or indirectly rely
> >on BIOS) wouldn't work.
>
> APM requires Intel Pentium System Management Mode (SMM/SMI), I am not
> share if this is under NDA, like the Intel BIOS writers guide (sp?).

SMM is documented but is very weird. One thing to bear in mind is that you
don't have to hide power management from the OS which is half the reason
for SMM mode. You can do your power management directly in Linux by
hitting hardware registers


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