Messages in this thread | | | Subject | Re: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32 | From | Guenter Roeck <> | Date | Fri, 9 Apr 2010 14:01:02 -0700 |
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On Fri, 2010-04-09 at 16:44 -0400, H. Peter Anvin wrote: > 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.
Fair and good enough, as long as it is going to show up somewhere.
Guenter
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