FreeBSD 8.0 hangs on boot with ACPI enabled

[John Baldwin]

On Saturday 02 January 2010 5:06:48 pm 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.
> 
> Any hints about where to start doing this?  I could probably run the
> machine through a remote GDB, but haven't been doing that for years
> (and the machine doesn't have a FireWire interface either so I'd have
> to use plain RS-232), so I'd preferrably start with a bit of "printf
> debugging" first.  If someone can give me some hints about which
> files/functions to touch, I'd be grateful.

You can probably start with acpi_attach() adding a printf at the top of that 
and after it calls bus_generic_attach().  You will want to figure out your 
device's PCI address and use pci_cfgregread() to fetch the value of the BAR at 
each printf.

-- 
John Baldwin