<div dir="ltr"><div>Hi,<br><br></div>I am stuck at how to set up IPI for Pi 2. <a href="https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2836/QA7_rev3.4.pdf">This</a> is a document I have referred to get an idea of interrupts. Would be great to get some help on how to proceed.<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jul 31, 2015 at 7:33 PM, Joel Sherrill <span dir="ltr"><<a href="mailto:joel.sherrill@oarcorp.com" target="_blank">joel.sherrill@oarcorp.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><br>
<br>
On 7/31/2015 8:11 AM, Rohini Kulkarni wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
<br>
How is the number of processors to be used for an application specified?<br>
The used count minimum of that supported in hardware and that configured. How to specify the latter?<br>
</blockquote>
<br>
</span><a href="https://docs.rtems.org/doc-current/share/rtems/html/c_user/Configuring-a-System-SMP-Specific-Configuration-Parameters.html#Configuring-a-System-SMP-Specific-Configuration-Parameters" rel="noreferrer" target="_blank">https://docs.rtems.org/doc-current/share/rtems/html/c_user/Configuring-a-System-SMP-Specific-Configuration-Parameters.html#Configuring-a-System-SMP-Specific-Configuration-Parameters</a><br>
<br>
and see the smptests. Many of which do specify the maximum.<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Thanks.<span class=""><br>
<br>
On 29 Jul 2015 15:29, "Sebastian Huber" <<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a> <mailto:<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a>>> wrote:<br>
<br>
<br>
<br>
On 29/07/15 11:52, Rohini Kulkarni wrote:<br>
<br>
<br>
<br></span><div><div class="h5">
On Tue, Jul 28, 2015 at 12:24 PM, Sebastian Huber <<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a> <mailto:<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a>> <mailto:<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a> <mailto:<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a>>>> wrote:<br>
<br>
Hello Rohini,<br>
<br>
please use the devel list.<br>
<br>
On 28/07/15 07:41, Rohini Kulkarni wrote:<br>
<br>
Hi,<br>
<br>
I wish to understand where the interprocessor interrupts are<br>
used during the boot process. During final initialization of<br>
SMP I can see<br>
<br>
rtems_interrupt_handler_install(<br>
ARM_GIC_IRQ_SGI_0,<br>
"IPI",<br>
RTEMS_INTERRUPT_UNIQUE,<br>
bsp_inter_processor_interrupt,<br>
NULL<br>
);<br>
<br>
Raspberry Pi 2 does not have the generic interrupt controller.<br>
Interrupt routing will have to be handled differently. So I<br>
wish to understand how/ where it is used. I suppose this might<br>
be the problem.<br>
<br>
<br>
Sorry, that the documentation is so scattered. I think we should<br>
move everything into the CPU Architecture Supplement. It would be<br>
nice if you can help to improve the documentation since you have a<br>
different view point.<br>
<br>
You must install the IPI during the system initialization. It is<br>
raised via the _CPU_SMP_Send_interrupt() function, for an example<br>
see arm-a9mpcore-smp.c.<br>
<br>
I could locate the function in arm-a9mpcore-smp.c. but it would be helpful if I can know where this being called from, a deeper call hierarchy, so that I can ascertain this is a problem. I can see a Send_messgae function call this. But don't know where the send message is being called from.<br>
<br>
<br>
You can run one of the SMP tests on the realview_pbx_a9_qemu_smp BSP on Qemu and set a break point to _CPU_SMP_Send_interrupt() if you want to know how it is used.<br>
<br>
--<br>
Sebastian Huber, embedded brains GmbH<br>
<br>
Address : Dornierstr. 4, D-82178 Puchheim, Germany<br>
Phone : +49 89 189 47 41-16<br>
Fax : +49 89 189 47 41-09<br></div></div>
E-Mail : <a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a> <mailto:<a href="mailto:sebastian.huber@embedded-brains.de" target="_blank">sebastian.huber@embedded-brains.de</a>><span class=""><br>
PGP : Public key available on request.<br>
<br>
Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.<br>
<br>
</span></blockquote><div class="HOEnZb"><div class="h5">
<br>
-- <br>
Joel Sherrill, Ph.D. Director of Research & Development<br>
joel.sherrill@OARcorp.com On-Line Applications Research<br>
Ask me about RTEMS: a free RTOS Huntsville AL 35805<br>
Support Available (256) 722-9985<br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature"><div dir="ltr">Rohini Kulkarni</div></div>
</div>