Re: [PATCH] add PCI ROMs to sysfs

[Matthew Wilcox <willy@debian.org>]

On Fri, Aug 27, 2004 at 03:29:38PM -0700, Jon Smirl wrote:
> I would think that it would return 4MB. If it can't find standard ROM
> headers it should return the window size. 

The patch I just sent changes this ... if we can find PCI headers,
we should return nothing.

> Are you sure you are getting the correct contents of those ROMs? Would
> it be worthwhile to try and get the author of the ROMs to add standard
> ROM headers? The content you included doesn't look that useful unless
> that is what IA64 instructions look like.

It looks like nothing that makes any sense to me.  Maybe it's a blanked
EEPROM or something.  This particular device is on the motherboard of a
prototype machine, so there could be almost anything going on with it ;-)

> If reading past 1MB for those ROMs causes a reboots, could something be
> wrong in the IA64 fault handing code?

No, that's normal behaviour on ia64 -- unacknowledged PCI reads cause a
machine check rather than reading ffffffff like x86 does.

-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain