Fwd: SMP support for Raspberry Pi 2

[Gedare Bloom]

On Sat, Aug 15, 2015 at 1:22 PM, Rohini Kulkarni <krohini1593 at gmail.com> wrote:
>
>
> On Wed, Aug 12, 2015 at 1:29 AM, Joel Sherrill <joel.sherrill at oarcorp.com>
> wrote:
>>
>>
>>
>> On 8/11/2015 2:06 PM, Rohini Kulkarni wrote:
>>>
>>> Hi,
>>>
>>> I would have to register the related mailbox interrupt and associate it
>>> with a handler that should be same as
>>> _SMP_Inter_processor_interrupt_handler(). Am I right?
>>
>>
>> That sounds correct.
>>
>>>  From where can I get a reference of how to do this?
>>
>>
>> I would look at the Xilinx code that registers interrupts. The API
>> should be the same. Also the clock driver, etc. The actual handler
>> and IRQ number will vary.
>
>
> How do I determine the interrupt number?
> I could fine the IPi handler being installed here in arm-a9mpcore-smp.c
>
Interrupt numbers are usually part of a TRM.

> rtems_interrupt_handler_install(
>       ARM_GIC_IRQ_SGI_0,
>       "IPI",
>       RTEMS_INTERRUPT_UNIQUE,
>       bsp_inter_processor_interrupt,
>       NULL
>     );
>>
>>
>>>
>>> On 11 Aug 2015 00:41, "Joel Sherrill" <joel.sherrill at oarcorp.com
>>> <mailto:joel.sherrill at oarcorp.com>> wrote:
>>>
>>>     The source for the CPU supplement is in doc/cpu_supplement in
>>>     the RTEMS tree.
>>>
>>>     I do not know when the latest online was built so reading it
>>>     there is probably safest.
>>>
>>>     To build it, you will likely have to install some texinfo and
>>>     texlive tools.
>>>
>>>     cd $r/doc
>>>     ../bootstrap
>>>     cd ../..
>>>     mkdir b-doc
>>>     cd b-doc
>>>     $r/doc/configure --enable-maintainer-mode \
>>>        --prefix=DIRECTORY
>>>     make
>>>     make install
>>>
>>>     That should be similar to how it is built.
>>>
>>>     --joel
>>>
>>>
>>>     On 8/10/2015 1:35 PM, Rohini Kulkarni wrote:
>>>
>>>         The documentation that Sebastian was referring to.
>>>
>>>         On Tue, Jul 28, 2015 at 12:24 PM, Sebastian Huber
>>> <sebastian.huber at embedded-brains.de
>>> <mailto:sebastian.huber at embedded-brains.de>
>>> <mailto:sebastian.huber at embedded-brains.de
>>> <mailto:sebastian.huber at embedded-brains.de>>> wrote:
>>>
>>>              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.
>>>
>>>         What is the CPU Architecture Supplement?
>>>
>>>
>>>              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>
>>> <mailto:krohini1593 at gmail.com <mailto:krohini1593 at gmail.com>>
>>> <mailto:krohini1593 at gmail.com <mailto:krohini1593 at gmail.com>
>>> <mailto: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>
>>> <mailto:sebastian.huber at embedded-brains.de
>>> <mailto:sebastian.huber at embedded-brains.de>>
>>>                       <mailto:sebastian.huber at embedded-brains.de
>>> <mailto:sebastian.huber at embedded-brains.de>
>>> <mailto: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>
>>> <mailto:sebastian.huber at embedded-brains.de
>>> <mailto:sebastian.huber at embedded-brains.de>>
>>>                           <mailto:sebastian.huber at embedded-brains.de
>>> <mailto:sebastian.huber at embedded-brains.de>
>>> <mailto: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
>>> <mailto:sebastian.huber at embedded-brains.de>
>>> <mailto: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
>>>
>>>
>>>     --
>>>     Joel Sherrill, Ph.D.             Director of Research & Development
>>>     joel.sherrill at OARcorp.com        On-Line Applications Research
>>>     Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>>>     Support Available                (256) 722-9985
>>>
>>
>> --
>> Joel Sherrill, Ph.D.             Director of Research & Development
>> joel.sherrill at OARcorp.com        On-Line Applications Research
>> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
>> Support Available                (256) 722-9985
>
>
>
>
> --
> Rohini Kulkarni
>
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