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Date:      Tue, 24 Mar 2009 15:07:48 +0000
From:      "Bruce M. Simpson" <>
To:, Mars G Miro <>
Subject:   Re: sk/msk no more
Message-ID:  <>
In-Reply-To: <>
References:  <> <> <> <> <>

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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.


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