mpc / linux kernel - user space

Jaap-Jan Boor jjboor at
Fri Nov 28 04:38:20 EST 2003

Hi Juergen,

That's normally not something you do and I don't know if it's possible.
Application code normally communicates with your driver code using
calls (read/write). So either your appl procedure must be part
of your module, or you must signal e.g. a user thread the timer
interrupt happened, so the thread can execute that code.
Hope this helps,


On 27-nov-03, at 17:07, Juergen Oberhofer wrote:

> Hi,
> I have a module and an application program in user space:
> The Module performs the following task: at init it initializes the cpm
> timer register of the mpc823,
> such that an interrupt is generated every x microseconds. Thus, I
> installed an interrupt handling function f that handles the timer
> interrupts.
> My problem is that the module / the interrupt handling function should
> execute a procedure defined in the application program. How can I pass
> a
> pointer (which points to that function) from the appl.program to the
> module, such that the handler can execute this function every x
> milliseconds? I thought to create a procedure in the module that
> accepts
> a function pointer as argument. But how can I achieve, that this module
> procedure is visible to the application program? Does somebody have a
> suggestion or know another way to do it?
> Regards,
> Juergen

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