SMP support for Raspberry Pi 2
Sebastian Huber
sebastian.huber at embedded-brains.de
Tue Jul 28 06:54:33 UTC 2015
Hello Rohini,
please use the devel list.
On 28/07/15 07:41, Rohini Kulkarni wrote:
> Hi,
>
> I wish to understand where the interprocessor interrupts are used
> during the boot process. During final initialization of SMP I can see
>
> rtems_interrupt_handler_install(
> ARM_GIC_IRQ_SGI_0,
> "IPI",
> RTEMS_INTERRUPT_UNIQUE,
> bsp_inter_processor_interrupt,
> NULL
> );
>
> Raspberry Pi 2 does not have the generic interrupt controller.
> Interrupt routing will have to be handled differently. So I wish to
> understand how/ where it is used. I suppose this might be the problem.
Sorry, that the documentation is so scattered. I think we should move
everything into the CPU Architecture Supplement. It would be nice if you
can help to improve the documentation since you have a different view point.
You must install the IPI during the system initialization. It is raised
via the _CPU_SMP_Send_interrupt() function, for an example see
arm-a9mpcore-smp.c.
>
> Thanks.
>
> On Wed, Jul 22, 2015 at 7:08 PM, Rohini Kulkarni
> <krohini1593 at gmail.com <mailto:krohini1593 at gmail.com>> wrote:
>
> Ok. Qemu suggestion seems helpful for the cache configuration
> issue though. I am trying with Pi 1.
>
> Thanks.
>
> On 22 Jul 2015 18:59, "Sebastian Huber"
> <sebastian.huber at embedded-brains.de
> <mailto:sebastian.huber at embedded-brains.de>> wrote:
>
> Sorry, I cannot help you here since I never worked with a
> Raspberry Pi.
>
> --
> Sebastian Huber, embedded brains GmbH
>
> Address : Dornierstr. 4, D-82178 Puchheim, Germany
> Phone : +49 89 189 47 41-16
> Fax : +49 89 189 47 41-09
> E-Mail : sebastian.huber at embedded-brains.de
> <mailto:sebastian.huber at embedded-brains.de>
> PGP : Public key available on request.
>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne
> des EHUG.
>
>
>
>
> --
> Rohini Kulkarni
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.huber at embedded-brains.de
PGP : Public key available on request.
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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