Wilkinson, Alex wrote: > 0n Fri, Mar 20, 2009 at 12:42:08PM -0400, John Baldwin wrote: > > >mcfg is a mechanism for doing faster PCI config access using a memory mapped window. > > As opposed to what ? > As opposed to bit-banging all PCI configuration space accesses through a couple of low ISA I/O space ports (PCI Configuration Mechanism #1... in the PCI SIG specs.) :-) For years PCI was an x86/Intel only thing, architectures which don't have this notion of ISA I/O port space have used memory mapped windows like this for years. cheers, BMSReceived on Tue Mar 24 2009 - 14:07:51 UTC
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