[LinuxBIOS] Winflashrom -- Current Status

Darmawan Salihun darmawan.salihun at gmail.com
Fri Aug 10 12:21:11 CEST 2007

Peter Stuge wrote:
> On Fri, Aug 10, 2007 at 03:08:26PM +0700, Darmawan Salihun wrote:
>> Roman Kononov wrote:
>>> Make all CPUs spinning inside a DPC function:
>> After discussing about the access method at length with more
>> experienced Windows driver developers. I think if HalGetBusData is
>> not working at all then direct I/O port access with your
>> "multiprocessor-aware kernel thread protection" is the "safest"
>> method.
> But PCI config accesses are not atomic operations. Is there a
> guarantee that the other CPUs are not in the middle of doing a PCI
> access already?
> And even if they are actually doing something else, perhaps they
> (erroneously? but we don't want to break them anyway) rely on 0xcfc
> being what they set it to in the last PCI config access?
> I really prefer using whatever API Windows offers.

That's why I'm trying this Hal***BusDataByOffset right now. Some
developers say that they work in some platform and not in others. That's
why I want to test it first hand ;-). I'm completing/reviewing the code
right now before testing it in my testbed machines.

Stay tuned :-)

Darmawan Salihun

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