cvs commit: src/sys/pci agp_intel.c

[John Baldwin]

jhb         2003/05/27 13:13:44 PDT

  FreeBSD src repository

  Modified files:
    sys/pci              agp_intel.c 
  Log:
  Fix support for 256 MB aperture sizes on chipsets such as the 845 and
  865.  The APSIZE register has a variable-sized field of enabled bits.
  To figure out how many bits a specific host bridge supports, write the
  maximum width and see how many bits are set in the hardware.  We then
  use this mask for setting and getting the aperture size.  Prior to this,
  the agp(4) driver would treat an aperture size of 256 MB as 128 MB and
  would not allocate enough physical memory for the GART as a result.
  
  MFC after:      3 days
  Sponsored by:   The Weather Channel
  Approved by:    re (rwatson)
  
  Revision  Changes    Path
  1.15      +16 -5     src/sys/pci/agp_intel.c