Philippe Gerum wrote:
> Steven A. Falco wrote:
>   
>> I am building kernel 2.6.25.4 from DENX with Xenomai 2.4.4 for PPC440EPx
>> (sequoia development board).
>>
>> The kernel tries to use DHCP to obtain network settings.  With IPIPE
>> disabled, this works perfectly.  However, when I enable IPIPE, the board
>> sends packets ok, but does not receive packets - I can see the DHCP with
>> a sniffer, but the development board does not receive them.
>
>   
> External interrupts are probably locked out by the pipeline engine;
> I've fixed a
> similar issue in recent patches for other PICs. Which I-pipe patch
> release are
> you using?


I am using the patch that came with Xenomai 2.4.4, namely:
adeos-ipipe-2.6.25-powerpc-DENX-2.2-02.patch

>> Also, in order to disable IPIPE, I had to patch
>> kernel/time/tick-common.c around line 168. It is missing an ifdef:
>>
>> diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
>> index 58bfacf..3a735b8 100644
>> --- a/kernel/time/tick-common.c
>> +++ b/kernel/time/tick-common.c
>> @@ -163,9 +163,11 @@ static void tick_setup_device(struct tick_device
>> *td,
>>
>> td->evtdev = newdev;
>>
>> +#ifdef CONFIG_IPIPE
>> /* I-pipe: derive global tick IRQ from CPU 0 */
>> if (cpu == 0)
>> ipipe_update_tick_evtdev(newdev);
>> +#endif
>>
>> /*
>> * When the device is not per cpu, pin the interrupt to the
>>
>> Signed-off-by: Steve Falco <sfalco@domain.hid>
>>
>> If anyone has suggestions as to why IPIPE is blocking received ethernet
>> packets, I'd appreciate it.
>>
>> Steve