lkml.org 
[lkml]   [2010]   [Apr]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] x86: Reserve legacy VGA MMIO area for x86_64 as well as x86_32
From
Date
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




\
 
 \ /
  Last update: 2010-04-09 23:03    [W:0.191 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site