cvs commit: src/sys/pci agp.c agp_i810.c agppriv.h agpreg.h

Eric Anholt anholt at
Fri Jul 13 16:28:12 UTC 2007

anholt      2007-07-13 16:28:12 UTC

  FreeBSD src repository

  Modified files:
    sys/pci              agp.c agp_i810.c agppriv.h agpreg.h 
  Add support for G965/Q965/GM965/GME965/GME945 AGP.
  This adds a function to agp.c to set the aperture resource ID if it's
  not the usual AGP_APBASE.  Previously, agp.c had been assuming
  AGP_APBASE, which resulted in incorrect agp_info, and contortions by
  agp_i810.c to work around it.
  This also adds functions to agp.c for default AGP_GET_APERTURE() and
  AGP_SET_APERTURE(), which return the aperture resource size and disallow
  aperture size changes.  Moving to these for our AGP drivers will likely
  result in stability improvements.  This should fix 855-class aperture
  size detection.
  Additionally, refuse to attach agp_i810 when some RAM is above 4GB and
  the GART can't reference memory that high.  This should be very rare.
  The correct solution would be bus_dma conversion for agp, which is
  beyond the scope of this change.  Other AGP drivers could likely use
  this change as well.
  G33/Q35/Q33 AGP support is also included, but disconnected by default
  due to lack of testing.
  PR:             kern/109724 (855 aperture issue)
  Submitted by:   FUJIMOTO Kou<fujimoto at>
  Approved by:    re (hrs)
  Revision  Changes    Path
  1.56      +52 -5     src/sys/pci/agp.c
  1.40      +306 -224  src/sys/pci/agp_i810.c
  1.6       +5 -0      src/sys/pci/agppriv.h
  1.19      +25 -2     src/sys/pci/agpreg.h

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