Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as wellas x86_32

[H. Peter Anvin]

On 04/09/2010 01:31 PM, Guenter Roeck wrote:
> 
> It is used for a custom FPGA implementing a watchdog timer and some
> other functionality.
> 
> This is not a matter of supporting such a device in Linux, it is a
> matter of explicitly excluding non-VGA devices from using VGA memory
> space.
> 
> If that is the decision, it might be worthwhile mentioning it somewhere
> in the documentation, to prevent others from ever using that memory
> space in an embedded system (and to save them the time needed to find
> out about it and to identify and implement a workaround).
> 

"Don't use legacy fixed-function addresses for nonstandard purposes."

There, there is your documentation.

	-hpa
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