Flashing VGA BIOS under Linux

Recommended by Wim's BIOS...

Hi,

is there any utility which can reflash ATI or Nvidia graphics card BIOS under Linux?
I know of ATIFLASH and NVFLASH under DOS, but I haven't seen anything for Linux (and no, DOS boot disks with ATIFLASH or NVFLASH don't count).

Any hints are appreciated. (The forum search and Google didn't turn up anything useful.) Thanks!

[edwin]

You want direct DOS hardware access from inside linux... OK...