Messages in this thread | | | Subject | Re: [PATCH] Don't touch BARs of host bridges | From | Benjamin Herrenschmidt <> | Date | Fri, 10 Dec 2004 15:46:38 +1100 |
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On Fri, 2004-12-10 at 00:20 +0000, Maciej W. Rozycki wrote: > Hello, > > BARs of host bridges often have special meaning and AFAIK are best left > to be setup by the firmware or system-specific startup code and kept > intact by the generic resource handler. For example a couple of host > bridges used for MIPS processors interpret BARs as target-mode decoders > for accessing host memory by PCI masters (which is quite reasonable).
Not very reasonable in fact imho but that happens on some embedded PPCs was well :) So I agree, that would be useful to skip them. I'm not sure about PCI_CLASS_NOT_DEFINED tho ...
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