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>> 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 PGP : Public key available on request. Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG. _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
