FreeBSD 8.0 hangs on boot with ACPI enabled

[Dana Myers]

Joerg Wunsch wrote:
> As John Baldwin wrote:
>
>   
>> OTOH, I'm not sure why initializing ACPI is trashing the BAR.  If
>> you want, you can try to narrow down at what point the BAR gets
>> reset to 0.
>>     
>
>   
Ah.  This isn't like the evil thing I've seen where PCI config
space is trounced during the legacy->ACPI mode switch.

Cheers,
Dana
> It happens here:
>
>         res = resource_list_alloc(rl, bus, dev, type, &reg, start, end, count,
>             prefetch ? RF_PREFETCHABLE : 0);
>         if (res == NULL) {
>                 /*
>                  * If the allocation fails, clear the BAR and delete
>                  * the resource list entry to force
>                  * pci_alloc_resource() to allocate resources from the
>                  * parent.
>                  */
>                 resource_list_delete(rl, type, reg);
> printf("resource_list_alloc() failed\n");
>                 start = 0;
>
> The printf() I added there triggers, and this resets "start" to 0.
>
> Where to proceed now?
>
>