Matthias Drochner wrote:
> garrett_damore@tadpole.com said:
>   
>> The pci_mapreg_map() manual page indicates that you can map a ROM
>> using PCI_MAPREG_TYPE_ROM.
>> Currently this won't work.  There is no PCI_MAPREG_TYPE_ROM macro
>> defined. 
>>     
>
> I didn't follow the thread, so I don't know in which circumstances
> you want to map PCI ROMs.
> I'd recommend however to be very careful with this and never
> allow to do this in generic code in a running system.
> To cite from the PCI spec (3.0, pg. 228):
>   
A specific device driver should be able to map ROMs.  I need to do this
from the radeonfb driver in order to get e.g. PLL timings.

    -- Garrett
>   In order to minimize the number of address decoders needed, a device
>   may share a decoder between the Expansion ROM [BAR] and other [BARs].
>   When expansion ROM decode is enabled [...] device independent
>   software must not access the device through any other [BARs].
>
> best regards
> Matthias
>
>   


-- 
Garrett D'Amore, Principal Software Engineer
Tadpole Computer / Computing Technologies Division,
General Dynamics C4 Systems
http://www.tadpolecomputer.com/
Phone: 951 325-2134  Fax: 951 325-2191