Greg, Suman added a simple debug interface for remoteproc at '/sys/kernel/debug/remoteproc/'.
On the BBB (AM335x) there are three devices available at that folder: remoteproc0 (the wakeup M3 core), remoteproc1 (PRU0), and remoteproc2 (PRU1). You can verify which is which by the 'name' file in each folder: cat /sys/kernel/debug/remoteproc/remoteproc1/name You can dump some control registers (CTRL, Program Counter, etc.) while the PRU is running by reading the 'regs' file: cat /sys/kernel/debug/remoteproc/remoteproc1/regs To halt a PRU, write a 1 to the single_step file. This will halt the PRU and allow you to dump the full register set: echo 1 > /sys/kernel/debug/remoteproc/remoteproc1/single_step cat /sys/kernel/debug/remoteproc/remoteproc1/regs You can continue single stepping through code and dumping the registers by repeating the two lines above. To run the PRU core again just write a 0 to the single_step file: echo 0 > /sys/kernel/debug/remoteproc/remoteproc1/single_step Jason Reeder On Wednesday, December 21, 2016 at 8:21:14 AM UTC-6, Greg wrote: > > Hello, a quick question on operating PRUs via the RemoteProc framework on > Beaglebone: > > Is there a command via RemoteProc which will stop execution of firmwares > running on the PRU(s)? > > There are bind and unbind capability in sys: > > echo "4a334000.pru0" > /sys/bus/platform/drivers/pru-rproc/bind > echo "4a338000.pru1" > /sys/bus/platform/drivers/pru-rproc/bind > > echo "4a334000.pru0" > /sys/bus/platform/drivers/pru-rproc/unbind > echo "4a338000.pru1" > /sys/bus/platform/drivers/pru-rproc/unbind > > The unbind appears to disconnect RPMsg (character devices gone), but it > does not halt the PRU! > > So after unbind, I am doing this: > > sudo rmmod pru_rproc > sudo rmmod pruss > > So after removing pruss the PRUs appear to halt. > So that is a total of 3 commands to halt a PRU. > > So what I am looking for is a RemoteProc framework capability to halt the > PRU(s) from user-space. > If there is none, I will use the rmmod commands as above. I'm hoping I am > missing a simpler method. > > Regards, > Greg > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/c7700470-495f-442e-a427-f6d41476a035%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
