Re: rombios Info port

Selon Frank Cornelis <Frank.Cornelis@xxxxxxxxxxxxx>:

> Hi,
> 
> The rombios Info port at address 0xfff0 causes trouble when using PCI
> devices because most OSes temporary remap the I/O ports of a PCI device
> to the maximum address in order to determine the range of the I/O port
> region of the device. So when the PCI device remaps itself to the
> requested maximum port (for region size determination by the OS) we run
> into trouble with that rombios Info port.
> The file iodev/biosdev.cc states that 0xfff0 is a legacy port... is it
> still needed?
> 
> 
Hi Frank.

The 0xfff0 port was intended to be used with older bioses.
I think it's no problem to remove it now.

You may run into the same problem with the 0x8900 
(shutdown), 0xfedc (debugger toggle) ports.
Maybe we should relocate these ports lower in the 
io space.

-- 
--
Christophe Bothamy
cbbochs@xxxxxxx


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