PCI Radeon RV100 detection hang on sparc64

[David Miller]

From: mroos at linux.ee
Date: Tue, 24 Sep 2013 00:14:41 +0300 (EEST)

>> > That looks quite strange. I guess the kernel should map the ROM at the
>> > address OpenBoot/OF assigned to it. ( 10020000 ).
>> 
>> The address you see is a raw physical I/O address, which is a concatenation
>> of the I/O window physical address for that PCI controller and the
>> PCI bus assigned address.
>> 
>> This is what we store in the resource values.
>> 
>> The pci_assign_resource() path must have some bug that causes the
>> resource values to be set incorrectly or similar.
>> 
>> Meelis, what is the value of pci_resource_start(pdev, PCI_ROM_RESOURCE)
>> before the pci_map_rom() call?
> 
> [drm] radeon_read_bios: pci_resource_start(ROM)=000001FF10020000
> 
> I am a little confused here. ROM addressis OK but after pci_map_rom it 
> results in address that corresponds to another device?

That's certainly a bug.

So after pci_map_rom() pci_resource_start(ROM)=000001FF00000000, right?