What is your debugging setup? It would be really helpful for my future works on Rpi3.
Thanks, Niteesh On Tue, 21 Jan, 2020, 7:23 AM Alan Cudmore, <alan.cudm...@gmail.com> wrote: > A little more information on my Raspberry Pi 2 SMP tests: > > The BSP startup is getting to this loop: > https://git.rtems.org/rtems/tree/cpukit/score/src/percpustatewait.c#n49 > (In the function _Per_CPU_State_wait_for_non_initial_state) > In the while loop on line 49, the CPU state is PER_CPU_STATE_INITIAL (0). > The while loop calls _CPU_SMP_Processor_event_receive() and returns, > but the state is still 0 > It calls _CPU_SMP_Processor_event_receive() again and does not return. > > I'm reading up on the defines in percpu.h (comments for the defines > are very helpful by the way) > Based on what I can tell in the comments, the boot CPU will wait in > PER_CPU_STATE_INITIAL > until the secondary processors complete their primary initialization > and transition to > PER_CPU_STATE_READY_TO_START_MULTITASKING. > > Next is to figure out why the secondary processors are not > transitioning or possibly why events are not occurring? > > Alan > > On Mon, Jan 20, 2020 at 6:25 PM Chris Johns <chr...@rtems.org> wrote: > > > > On 21/1/20 10:20 am, Alan Cudmore wrote: > > > As it turns out the latest RTEMS master may need some of the dtb > > > and/or overlay files in the raspberry pi SD card. But the updated > > > instructions that Niteesh submitted for the raspberrypi BSP should > > > still be valid. > > > > Great. > > > > > Either way, we should be able to automate it. A firmware release on > > > Github is ~180 megabytes. If you clone the whole repository, it's 10+ > > > Gigabytes, probably because you get every binary release. > > > > Ouch. If we list the needed files, even if there is a few, I can fetch > them from > > github and avoid a full clone. We would need to settle on a specific > hash or > > version but that is not a bad thing. > > > > > I'm trying to troubleshoot the RPi 2 SMP a little bit now. Non SMP > > > code seems to work on the Pi 2, but when you have an example with > > > #define CONFIGURE_MAXIMUM_PROCESSORS 4 > > > it crashes during initialization. > > > > Awesome and all the best. I am sure you will figure it out. > > > > Chris >
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