From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
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Date: Mon, 3 Jul 2006 14:39:28 +0200
Subject: Re: [Xenomai-core] Some questions about the ARM port (Integrator
	vs.	PXA)
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To: Detlef Vollmann <dv@domain.hid>
Cc: Jan Kiszka <jan.kiszka@domain.hid>, xenomai@xenomai.org

Detlef Vollmann wrote:
 > It's not so difficult to work around the problem for a single system.
 > What's difficult is to find a solution in a framework that wasn't
 > built with such a problem in mind.

Actually, all architectures have a delay below which they can not be
reprogrammed fast enough. This delay is simply 0 for all of them.

How about rewriting rthal_timer_program_shot as:

static inline void rthal_timer_program_shot (unsigned long delay)
{
    if(delay < __ipipe_mach_min_delay)
        rthal_trigger_irq(RTHAL_TIMER_IRQ);
    else
        __ipipe_mach_set_dec(delay);
}

And define __ipipe_mach_min_delay to be 8 ticks for the PXA architecture ?

-- 


					    Gilles Chanteperdrix.