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List:       uclinux
Subject:    Re: [UCLINUX] CPU internal address space access in uClinux
From:       Marcel Dasen <dasen () tik ! ee ! ethz ! ch>
Date:       1999-09-07 13:25:54
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"Vladimir A. Gurevich" wrote:
> 
> Hello,
> 
> I was trying to write a user-level program (running under root) that tried
> to access the internal registers of 68EZ328. (0xFFFFF000 -- 0xFFFFFFFF).
> The program was killed by SIGSEGV.

Use a memory device (permissions can then be set according to your
needs). Although this is a very clean method, it implies a large
overhead (sys-call) and function argument passing just for setting a
couple of bits.

Regards
-md
-- 
Marcel Dasen    -     ETH Swiss Federal Institute of Technology
Phone # ++41 1 632 7013 - TIK Computer Engineering and Networks
Fax # ++41 1 632 1035         -      Laboratory, CH-8092 Zurich
email: <dasen@tik.ee.ethz.ch>  
http://www.tik.ee.ethz.ch/~dasen

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