enable ECC in OS code?

[Andriy Gapon]

Here is a question that I am afraid I know an answer for.
I have some ECC capable hardware:
1) Athlon II with embedded memory controller that can do ECC
2) DRAM modules with ECC
Assuming that ECC data lanes are connected between the two on motherboard, and
given that BIOS doesn't perform any ECC setup (nor there is any option to control
that) - would it be possible to turn on ECC from OS code?
Or is it too late in the game already?

-- 
Andriy Gapon