From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Tue, 10 Apr 2012 14:06:05 +0200
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Subject: Re: [Xenomai-core] preemptive doesn't work
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To: Roberto Bielli <roberto.bielli@domain.hid>
Cc: xenomai@xenomai.org

On 04/10/2012 02:05 PM, Roberto Bielli wrote:
> Hi Gilles,
> 
> i added this in configure of xenomai so i pass --enable-arm-mach=imx25
> 
> imx25)        arch=5
>              tsc_type=__XN_TSC_TYPE_FREERUNNING;;
> 
> Furthermore in plat-mxc/include/mach/mxc.h explain which are cpumx2 and 
> imx25 is NOT mx2
> #define cpu_is_mx2()    (cpu_is_mx21() || cpu_is_mx27())
> 
> i don't understand a things.
> Does the tsc necessary to calculate correct timer period, or can i 
> disable tsc and xenomai continue work correctly ?

Xenomai needs the tsc in kernel-space. Obviously, if you do not use the
tsc in user-space, you will not see that it is wrong. Correct physical
address is only needed for user-space.

> 
> However i cannot use tsc in my simple application. I resend the simple C 
> application that doesn't work.

What do you mean you can not use the tsc in your application? What
happens if you use it?

-- 
                                                                Gilles.