ioports 0x100-0x3af and iomem 0xd000-0xdffff, 0xa0000000-0xa0ffffff -- safe to use on x86 for pcmcia?

Peter Stuge peter at
Tue Nov 24 18:16:52 EST 2009

Dominik Brodowski wrote:
> 	include port 0x100-0x3af
> 	include memory 0xc0000-0xfffff
> 	include memory 0xa0000000-0xa0ffffff
> Do you think it would be safe to enable these areas by (kernel)
> default on x86?

c0000-fffff is option ROM and BIOS land. Maybe every BIOS out there
is being a good boy/girl and actually adds entries to e820 or similar
but I would kindof like to stay away from the region anyway.

0xa0000000 is 2.5GB, so it's doomed on systems with >=2.5GB RAM. :(


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