I/O Port Conflicts with PCI devices?
Paul Mackerras
paulus at cs.anu.edu.au
Tue Feb 2 10:23:49 EST 1999
Bryan Christianson <bryanc at ihug.co.nz> wrote:
> The following listing of /proc/pci shows that I have 2 devices reporting an
> I/O port of 0x400. Is this possible or am I not seeing the whole truth
> here? When I try to access the port (with inl() or outl()), the machine
> panics. I published this panic on the list last week and had no response.
Most likely neither devices is responding to I/O-space accesses
because the PCI_COMMAND_IO bit (enable response to I/O space accesses)
in the PCI command register isn't set. That would explain the machine
check when you try to access the device.
Paul.
[[ This message was sent via the linuxppc-dev mailing list. Replies are ]]
[[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]]
[[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]]
[[ the message 'unsubscribe' to linuxppc-dev-request at lists.linuxppc.org ]]
More information about the Linuxppc-dev
mailing list