cvs commit: src/sys/dev/pci pci_pci.c pcib_private.h

[Warner Losh]

imp         2004/01/10 22:52:31 PST

  FreeBSD src repository

  Modified files:
    sys/dev/pci          pci_pci.c pcib_private.h 
  Log:
  Add support for subtractive decoding bridges.  These bridges pass all
  signals to addresses to the child busses.  Typically, ProgIf of 1
  means a subtractive bridge.  However, Intel has a whole lot of ones
  with a ProgIf of 80 that are also subtractive.  We cope with these
  bridges too.  This eliminates hw.pci.allow_unsupported_io_range
  because that had almost the same effect as these patches (almost means
  'buggy').  Remove the bogus checks for ISA bus locations: these cycles
  aren't special and are only passed by transparent bridges.
  
  We allow any range to succeed.  If the range is a superset of the
  range that's decoded, trim the resource to that range.  Otherwise,
  pass the range unchanged.  This will change the location that PC Card
  and CardBus cards are attached.  This might bogusly cause some
  overlapping allocation that wasn't present before, but the overlapping
  fixes need to be in the pci level.
  
  There's also a few formatting changes here.
  
  Revision  Changes    Path
  1.29      +126 -159  src/sys/dev/pci/pci_pci.c
  1.6       +2 -0      src/sys/dev/pci/pcib_private.h