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RE: Axcessing *R_PAR1_CTRL_DATA from programs under Linux.



Hi,

The internal registers are not available from userspace
(I don't think you can find any platform with a MMU
that lets you tamper with hardware registers directly).
If you need to access the registers you should do it
from kernel space e.g. from a device driver.

Regards
/Mikael

-----Original Message-----
From: owner-dev-etrax@xxxxxxx.com]On">mailto:owner-dev-etrax@xxxxxxx.com]On
Behalf Of Jonas Aaberg
Sent: Monday, April 30, 2001 9:59 AM
To: dev-etrax
Subject: Axcessing *R_PAR1_CTRL_DATA from programs under Linux.



Hi,

Under Elinux on the old Etrax 100 you could simply do
"*R_PAR0_CTRL_DATA = .." to change, in this case par0,
to something from a program. 
 
How do I do the same with Linux on the Etrax 100LX?
With the same code, I get a seg fault.

/Jonas

-- 
Jonas Aaberg               Email: aberg@xxxxxxx.ch
Supercomputing Systems AG  Web:   http://www.scs.ch
Technoparkstrasse 1        Phone: +41 (0) 1 445 16 00
CH-8005 Zuerich            Fax:   +41 (0) 1 445 16 10