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ESCDInfo and NVRAM access.

Hello All.
While getting ESCD info, we've got full 32bit nvram_base_adress.
Then if I want to read ESCD Data how can I kernel that r/w access to this
segment is OK? Kernel generates oops when BIOS function called and try
to access this area. Segmentation fault ocurs.
May be I don't understand something?
   Best regards.
        Ruslan.

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