cvs commit: src/sys/pci agp_i810.c

Eric Anholt anholt at
Tue Sep 26 23:38:55 PDT 2006

anholt      2006-09-27 06:38:54 UTC

  FreeBSD src repository

  Modified files:
    sys/pci              agp_i810.c 
  Add support for 945G/GM AGP chipsets.
  The key problem was that the aperture size detection using the MSAC bit
  doesn't work -- the bit appears to be set even when it shouldn't be.  Linux
  takes a different approach, testing for a bit of the GMADR (PCIR_BAR(2)) being
  set.  However, as I don't think that's a safe way to test aperture size, we
  just allocate the resource and check its size.  This also pointed out that
  agp_generic_attach hadn't been allocating our aperture resource, which may
  have caused problems in some cases.
  Also corrected is a minor copy-and-pasteo in an error case.
  PR:             kern/103079
  Submitted by:   mnag
  Tested on:      i945GM, i915GM
  MFC after:      2 weeks
  Revision  Changes    Path
  1.39      +29 -13    src/sys/pci/agp_i810.c

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