Re: [Xenomai-help] enable/disable all interrupts from user space

[Jan Kiszka <jan.kiszka@domain.hid>]

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Jeff Weber wrote:
> Thanks Jan.
> 
> Another thought: is there a direct Adeos  call to enable/disable all 
> interrupts, with nesting from user space?

Not yet, but that would be one option for the scenario I described.

> 
> I'm porting some legacy RTAI code to the Xenomai native skin.  The RTAI code 
> has rtai_save_flags_and_cli()/rtai_restore_flags() for enabling/disabling all 
> interrupts  direct from user space, with capability to handle nested calls.  

You can use even more assembly magic in user-space for now:

#define local_irq_save(x) \
	__asm__ __volatile__("pushfl; popl %0; cli":"=g" (x)::"memory")

#define local_irq_restore(x) \
	__asm__ __volatile__("pushl %0; popfl": :"g" (x):"memory", "cc")

Hope your RTAI code takes care of SMP as well (or excludes the execution
on such boxes).

> 
> Yes, please add this to the native skin "wish list", along with a nesting 
> capability.

Won't you? => http://www.xenomai.org/wiki/index.php/TaskMarket

Ideas and requests on the mailing list are starting become volatile with
the increasing traffic we see...

Jan


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