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Date: Mon, 4 Jan 2010 23:37:38 +0100
From: Joerg Wunsch <j@uriah.heep.sax.de>
To: John Baldwin <jhb@freebsd.org>
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Subject: Re: FreeBSD 8.0 hangs on boot with ACPI enabled
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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.

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?

-- 
cheers, J"org               .-.-.   --... ...--   -.. .  DL8DTL

http://www.sax.de/~joerg/                        NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)