Hello Benji, On Wed, 24 Oct 2001, Ben Huo wrote: > Yes, you are right that it will conflict with PIC 8259. But actually > it won't. For, CPU intercept the special open sequence and will not > forward out to chipset. That 8259 in the chipset will never have the > chance been programmed. Only actual 8259 instruction will released > outward for chipset. All the BIOS do like this, and they never had a > problem.
The question is if it is correct that the kernel reserves the whole area. Ok, I can access the registers from my driver without registering the addresses, but that seems to be a dirty hack. I'm not sure if there is any 8259 or derivate that needs all the reserved ports. If not, the reservation should be changed in the kernel, if yes I assume there should be some kind of processor specific change of behaviour. Robert -- +--------------------------------------------------------+ | Dipl.-Ing. Robert Schwebel | | Linux Solutions for Science and Industry | | Braunschweiger Straße 79, 31134 Hildesheim, Germany | | Phone: +49-5121-28619-0 Fax: +49-5121-28619-4 | +--------------------------------------------------------+ -- To unsubscribe from this list, send a message to [EMAIL PROTECTED] with the command "unsubscribe linux-embedded" in the message body. For more information, see <http://waste.org/mail/linux-embedded>.
