From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <454232CE.3010206@domain.hid>
Date: Fri, 27 Oct 2006 18:24:46 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
MIME-Version: 1.0
Subject: Re: [Xenomai-help] enable/disable all interrupts from user space
References: <45420A72.8000700@domain.hid> <200610271108.14937.jweber@domain.hid>
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To: Jeff Weber <jweber@domain.hid>
Cc: Xenomai Help <xenomai@xenomai.org>

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Jeff Weber wrote:
> Thanks Jan.
>=20
> Another thought: is there a direct Adeos  call to enable/disable all=20
> interrupts, with nesting from user space?

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

>=20
> I'm porting some legacy RTAI code to the Xenomai native skin.  The RTAI=
 code=20
> has rtai_save_flags_and_cli()/rtai_restore_flags() for enabling/disabli=
ng all=20
> interrupts  direct from user space, with capability to handle nested ca=
lls. =20

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

#define local_irq_save(x) \
	__asm__ __volatile__("pushfl; popl %0; cli":"=3Dg" (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).

>=20
> Yes, please add this to the native skin "wish list", along with a nesti=
ng=20
> capability.

Won't you? =3D> 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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