Hi, I am stuck at how to set up IPI for Pi 2. This <https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2836/QA7_rev3.4.pdf> is a document I have referred to get an idea of interrupts. Would be great to get some help on how to proceed.
On Fri, Jul 31, 2015 at 7:33 PM, Joel Sherrill <joel.sherr...@oarcorp.com> wrote: > > > On 7/31/2015 8:11 AM, Rohini Kulkarni wrote: > >> Hi, >> >> How is the number of processors to be used for an application specified? >> The used count minimum of that supported in hardware and that configured. >> How to specify the latter? >> > > > 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 > > and see the smptests. Many of which do specify the maximum. > > Thanks. >> >> On 29 Jul 2015 15:29, "Sebastian Huber" < >> sebastian.hu...@embedded-brains.de <mailto: >> sebastian.hu...@embedded-brains.de>> wrote: >> >> >> >> On 29/07/15 11:52, Rohini Kulkarni wrote: >> >> >> >> On Tue, Jul 28, 2015 at 12:24 PM, Sebastian Huber < >> sebastian.hu...@embedded-brains.de <mailto: >> sebastian.hu...@embedded-brains.de> <mailto: >> sebastian.hu...@embedded-brains.de <mailto: >> sebastian.hu...@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. >> >> 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. >> >> 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. >> >> >> 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. >> >> -- >> 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.hu...@embedded-brains.de <mailto: >> sebastian.hu...@embedded-brains.de> >> PGP : Public key available on request. >> >> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. >> >> > -- > Joel Sherrill, Ph.D. Director of Research & Development > joel.sherr...@oarcorp.com On-Line Applications Research > Ask me about RTEMS: a free RTOS Huntsville AL 35805 > Support Available (256) 722-9985 > -- Rohini Kulkarni
_______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
