Hi Stefan, On Sun, Feb 28, 2021 at 8:04 AM Stefan Akatyschew <stefan....@posteo.de> wrote: > > Hello together, > after I could successfully fiddle around with some tasks on a single > core, I tried to get some basic SMP application running. > I use as before trace32 to load the program and added parts from the > lauterbach iMX7-sabre SMP startup script. With that I at get both cores > running. And also my RTEMS 5 compiler tells me, that RTEMS_SMP is defined. > And it should work on iMX7 https://docs.rtems.org/branches/master/cpu-supplement/arm.html#symmetric-multiprocessing
I don't personally have experience with that, so I can only give some general advice. > For my application code, I oriented myself on the "smp01" example. > https://git.rtems.org/rtems/tree/testsuites/smptests/smp01 > Unfortunately I see that core 0 is stuck in the "smpmulticastaction.c" > in some loading functions, I can't really wrap my head around? While Which function? can you backtrace? > core 1 is stuck at an IRQ intialisation routine (in irq/irq-gic.c) for ditto? > the second core. > I tried fiddeling around with the configuration and different taks, but > get always the same response. I've gone through the user manual and the > API guide, but couldn't find any problems. > The application as is works fine on a single core, if I set the > CONFIGURE_MAXIMUM_PROCESSORS to 1. > > Any ideas what I'm doing wrong? I attached my two source files and the > practice Script. > Unfortunately, I don't think the SMP boot sequence is well-documented. You probably have to work your way through the code. bsps/arm/shared/start/arm-a9mpcore-smp.c There is some doxygen that might help you too: https://docs.rtems.org/doxygen/branches/master/group__ScoreSMP.html and you can check out the bspsmp.c files beneath bsps/ of some other implementations for some ideas. We probably need a section related to SMP initialization added to https://docs.rtems.org/branches/master/bsp-howto/index.html Maybe someone with more experience on this particular board or with arm/SMP will be able to suggest better insight. -Gedare > Thanks a lot for your help. > Kind regards, > Stefan_______________________________________________ > users mailing list > users@rtems.org > http://lists.rtems.org/mailman/listinfo/users _______________________________________________ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
