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SubjectRe: mmap from 0xFFFF0000 -> 0xFFFFFFFF does not work, why?!
On Fri, 7 May 1999, Matti Aarnio wrote:

> Bossek Raphael <> asked:
> > i'm working at a bios flash utility for some pc manufacture and have
> > trouble in using the mmap function :(
> Loading the timing critical FLASH-writer code into the kernel
> as a module. Doing it as a character device would likely be
> the best way.
> "root" isn't powerfull enough, those must be executed
> in the supervisor mode -- within the kernel, that is.
> Another reason to go via device driver kernel module.


You might already know this, but if not it could be useful. Stepan
Reinauer has been maintaining and updating his /dev/bios module (the
interface is a character device file) which can read and write the flash
BIOS in most PC's and Alpha's, and even PCI cards (like video and SCSI
adapters). I've used it quite successfully. :-)

BTW if the latest version available on the website Oops's in 2.2.6, let me
know and I'll send you a diff that fixes it. Stepan already fixed the
problem internally but may not have had time to update the web page.

B. James Phillippe .
Software Engineer, WGT Inc. .

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