Re: FreeBSD image hangs during boot

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Laurent Vivier wrote:
> Avi Kivity wrote:
>   
>> Aurelien Jarno wrote:
>>     
>>> It's actually described page 200 of the specifications (page 216 in
>>> ACPIspec30.pdf):
>>>
>>>   Note: This descriptor is meant for describing interrupts that are
>>> connected to PIC-compatible
>>>   interrupt controllers, which can only be programmed for
>>> Active-High-Edge-Triggered or Active-
>>>   Low-Level-Triggered interrupts. Any other combination is illegal.
>>> The Extended Interrupt
>>>   Descriptor can be used to describe other combinations.
>>>
>>>
>>>  
>>>       
>>>> Avi, if you think this anlysis is correct I can provide the patch
>>>> changing
>>>> "Level" to "Edge"...
>>>>
>>>>     
>>>>         
>>> It looks like the solution is either to describe the IRQ with an
>>> "Extended Interrupt Descriptor" or to change this value to one of the
>>> two allowed values. In the later case we have to make sure it is
>>> consistent with the way the PIC works.
>>>
>>>   
>>>       
>> The attached patch attempts to override the pci irqs (now limited to 5,
>> 9, 10, and 11) to be active high level triggered.  Linux boots and
>> parses this correctly.  Freebsd still fails.
>>     
>
> FreeBSD will fail while ACPI will have Active-High and Level-triggered, except
> if you define, as Aurélien said, an "Extended Interrupt Descriptor" in ACPI table.
>
> BTW, I'm not able to boot Debian Sarge (2.6.8-11-amd64-generic) with your patch
> (as before).
>
> Moreover, I don't understand what this patch resolves...

I thought this was the extended interrupt descriptor; sorry my confusion.

Meanwhile I changed the dsdt to use the _real_ extended enhanced 
advanced improved interrupt descriptor, and freebsd now boots.  FC6 and 
Windows survived.  I'll push this after further testing.

-- 
Any sufficiently difficult bug is indistinguishable from a feature.


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