Re: [Xenomai] [Xenomai-help] Latency calculation on da850 (Omap L138)

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 12/15/2012 02:56 PM, Gilles Chanteperdrix wrote:

> On 12/15/2012 02:31 PM, GUGLIELMO NAVARRA wrote:
> 
>> Thanks for your reply,
>> my tsc_info definition is:
>>
>> /*------------------------------------------------
>>   Timer che utilizza IPIPE
>>  -------------------------------------------------*/
>> #ifdef CONFIG_IPIPE
>> static struct __ipipe_tscinfo tsc_info = {
>>         .type = IPIPE_TSC_TYPE_FREERUNNING,
>>        .u = {
>>                 {
>>                         .mask = 0xffffffff,
>>                 },
>>         },
>> };
>>
>> static void l138_xenomai_tsc_init(void)
>> {
>>    struct timer_s *t = &timers[TID_CLOCKSOURCE];
>>   
>>    tsc_info.type = IPIPE_TSC_TYPE_FREERUNNING;
>>    tsc_info.freq = l138_clock_tick_rate;
> 
>>    tsc_info.counter_vaddr = (unsigned long)(t->base + t->tim_off);
> 
>>    tsc_info.u.counter_paddr = DAVINCI_TIMER0_BASE + TIM12;
> 
> 
> What about t->tim_off ?


Also, if t->base can be something else than the result of an
ioremap(DAVINCI_TIMER0_BASE), then you should not hardcode
DAVINCI_TIMER0_BASE, as other boards may pass a different value, rather,
you should add a phys_base to "struct timer_s", and set it correctly for
each possible physical address.

-- 
                                                                Gilles.