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From: Jung-uk Kim <jkim@FreeBSD.org>
Date: Wed, 25 Aug 2010 22:09:02 +0000 (UTC)
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Subject: cvs commit: src/sys/dev/fb vesa.c
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jkim        2010-08-25 22:09:02 UTC

  FreeBSD src repository

  Modified files:
    sys/dev/fb           vesa.c 
  Log:
  SVN rev 211827 on 2010-08-25 22:09:02Z by jkim
  
  Add an experimental feature to shadow video BIOS.  Long ago, this trick was
  supported by many BIOSes to improve performance of VESA BIOS calls for real
  mode OSes but it is not our intention here.  However, this may help some
  platforms where the video ROMs are inaccessible after suspend, for example.
  Note it may consume up to 64K bytes of contiguous memory depending on video
  controller model when it is enabled.  This feature can be disabled by
  setting zero to 'debug.vesa.shadow_rom' loader tunable via loader(8) or
  loader.conf(5).  The default is 1 (enabled), for now.
  
  Revision  Changes    Path
  1.45      +57 -10    src/sys/dev/fb/vesa.c