Messages in this thread | | | Date | Fri, 09 Apr 2010 13:44:54 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 |
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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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