problem accessing /dev/port

From: Christopher Friesen (cfriesen@nortelnetworks.com)
Date: Thu Nov 22 2001 - 17:05:14 EST

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To begin, I'm running 2.2.17 with some patches.

I'm attempting to have a userspace app read and write I/O ports on a powerpc
machine. The obvious method (iopl()) doesn't seem to be available (using glibc,
but sys/io.h doesn't exist).

When I try and access /dev/port with a small utility that works fine on my PIII,
I get the error message "Device not configured". The file exists in /dev and
has the same permissions on both machines.

Do I need to enable something in the kernel to support this? Where is this
configured?

Thanks,

Chris

-- 
Chris Friesen                    | MailStop: 043/33/F10  
Nortel Networks                  | work: (613) 765-0557
3500 Carling Avenue              | fax:  (613) 765-2986
Nepean, ON K2H 8E9 Canada        | email: cfriesen@nortelnetworks.com
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