It's the hal_pru_generic code. It definitely smells like a bus error. In fact, if I comment out the lines that write to the GPIO, it stops happening, so it seems like I have the wrong addresses in there, but I'm struggling figuring out how that could be.
These lines are where the GPIO ports are written to in memory: https://github.com/PocketNC/machinekit-hal/blob/c8b38386d87abc45baa33593681cbae46d996980/src/hal/drivers/hal_pru_generic/pru_wait.p#L214-L217 Theoretically, the addresses should be set to the clear addresses of GPIO3, GPIO5, GPIO6 and GPIO7: Addresses defined here: https://github.com/PocketNC/machinekit-hal/blob/c8b38386d87abc45baa33593681cbae46d996980/src/hal/support/pru/pru.h#L303-L307 Loaded into registers here: https://github.com/PocketNC/machinekit-hal/blob/c8b38386d87abc45baa33593681cbae46d996980/src/hal/drivers/hal_pru_generic/pru_generic.p#L261-L264 On Tue, Apr 28, 2020 at 10:50 AM Jason Kridner <[email protected]> wrote: > What is the code running on PRUSS2 PRU1? > > This line kinda spells out an illegal access by that PRU or of that PRU: > MASTER PRUSS2 PRU1 TARGET L4_PER1_P3 (Idle): Data Access in Supervisor > mode during Functional access > > Looks like the error is from here: > https://github.com/beagleboard/linux/blob/7a920684860a790099061b67961d0b5ffa033fdf/drivers/bus/omap_l3_noc.c#L135 > > Looks like a bus exception to me. > > On Tue, Apr 28, 2020 at 11:46 AM <[email protected]> wrote: > >> I'm getting this stack trace in dmesg, but I'm unsure what it means or >> how to figure out what it means. As far as I can tell, the code running on >> the PRU is working. I'm generating a 100Khz signal on a direct output, and >> am able to successfully measure this signal. The Beaglebone is locking up, >> though, and I believe this stack trace is being spammed so heavily that the >> logging is taking over the CPU and my ssh shell gets locked out. >> >> I'm using this device tree overlay: >> https://github.com/PocketNC/BeagleBoard-DeviceTrees/blob/pocketnc-ai-test/src/arm/am5729-beagleboneai-pocketnc-pro.dts >> >> The code I'm running is implemented in PRU Assembly that is assembled >> with pasm. pasm outputs a .bin file and I need a .elf file for running it >> with remoteproc, so I'm jumping through some hoops to do that conversion. >> The elf file does seem to work, but I'm not sure if I need to do more to >> ensure I'm specifying what resources I need access to or something like >> that. I can go into more detail if need be. >> >> The stack trace is below. Any ideas about what is going on are >> appreciated! >> >> [ 168.153783] ------------[ cut here ]------------ >> [ 168.153829] WARNING: CPU: 0 PID: 0 at drivers/bus/omap_l3_noc.c:147 >> l3_interrupt_handler+0x27c/0x39c >> [ 168.153851] 44000000.ocp:L3 Custom Error: MASTER PRUSS2 PRU1 TARGET >> L4_PER1_P3 (Idle): Data Access in Supervisor mode during Functional access >> [ 168.153865] Modules linked in: xt_conntrack ipt_MASQUERADE >> nf_nat_masquerade_ipv4 rpmsg_rpc rpmsg_proto bnep btsdio bluetooth >> ecdh_generic brcmfmac pvrsrvkm(O) brcmutil cfg80211 uio_pruss_shmem evdev >> joydev stmpe_adc omap_remoteproc virtio_rpmsg_bus rpmsg_core 8021q garp mrp >> stp llc iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat >> usb_f_acm nf_conntrack u_serial usb_f_ecm usb_f_mass_storage iptable_mangle >> iptable_filter usb_f_rndis u_ether libcomposite cmemk(O) uio_pdrv_genirq >> uio spidev pruss_soc_bus pru_rproc pruss pruss_intc ip_tables x_tables >> [ 168.154474] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W O >> 4.14.108-ti-r119 #1 >> [ 168.154490] Hardware name: Generic DRA74X (Flattened Device Tree) >> [ 168.154538] [<c0113180>] (unwind_backtrace) from [<c010d690>] >> (show_stack+0x20/0x24) >> [ 168.154575] [<c010d690>] (show_stack) from [<c0ce54f4>] >> (dump_stack+0x80/0x94) >> [ 168.154609] [<c0ce54f4>] (dump_stack) from [<c013f5b8>] >> (__warn+0xf8/0x110) >> [ 168.154636] [<c013f5b8>] (__warn) from [<c013f628>] >> (warn_slowpath_fmt+0x58/0x74) >> [ 168.154667] [<c013f628>] (warn_slowpath_fmt) from [<c0741e10>] >> (l3_interrupt_handler+0x27c/0x39c) >> [ 168.154703] [<c0741e10>] (l3_interrupt_handler) from [<c01abcbc>] >> (__handle_irq_event_percpu+0xbc/0x280) >> [ 168.154734] [<c01abcbc>] (__handle_irq_event_percpu) from [<c01abebc>] >> (handle_irq_event_percpu+0x3c/0x8c) >> [ 168.154761] [<c01abebc>] (handle_irq_event_percpu) from [<c01abf54>] >> (handle_irq_event+0x48/0x6c) >> [ 168.154792] [<c01abf54>] (handle_irq_event) from [<c01aff78>] >> (handle_fasteoi_irq+0xc8/0x17c) >> [ 168.154822] [<c01aff78>] (handle_fasteoi_irq) from [<c01aad7c>] >> (generic_handle_irq+0x34/0x44) >> [ 168.154850] [<c01aad7c>] (generic_handle_irq) from [<c01ab390>] >> (__handle_domain_irq+0x8c/0xfc) >> [ 168.154879] [<c01ab390>] (__handle_domain_irq) from [<c01015e0>] >> (gic_handle_irq+0x4c/0x88) >> [ 168.154908] [<c01015e0>] (gic_handle_irq) from [<c0d02bcc>] >> (__irq_svc+0x6c/0xa8) >> [ 168.154925] Exception stack(0xc1501ed8 to 0xc1501f20) >> [ 168.154946] 1ec0: >> 00000001 00000000 >> [ 168.154973] 1ee0: fe600000 00000000 c1500000 c1504e60 c1504dfc >> c14cbb78 c1501f48 00000000 >> [ 168.154997] 1f00: 00000000 c1501f34 c1501f14 c1501f28 c012fcb8 >> c0109768 600f0013 ffffffff >> [ 168.155031] [<c0d02bcc>] (__irq_svc) from [<c0109768>] >> (arch_cpu_idle+0x30/0x4c) >> [ 168.155061] [<c0109768>] (arch_cpu_idle) from [<c0d02044>] >> (default_idle_call+0x30/0x3c) >> [ 168.155092] [<c0d02044>] (default_idle_call) from [<c018cc6c>] >> (do_idle+0x180/0x214) >> [ 168.155124] [<c018cc6c>] (do_idle) from [<c018d00c>] >> (cpu_startup_entry+0x28/0x2c) >> [ 168.155156] [<c018d00c>] (cpu_startup_entry) from [<c0cfb4b0>] >> (rest_init+0xdc/0xe0) >> [ 168.155194] [<c0cfb4b0>] (rest_init) from [<c1400eb8>] >> (start_kernel+0x434/0x45c) >> [ 168.155217] ---[ end trace d9047b952a20ba7f ]--- >> >> >> >> -- >> 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 [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/fde6b3e0-1a1d-43d5-8f78-14d604a7b1fa%40googlegroups.com >> <https://groups.google.com/d/msgid/beagleboard/fde6b3e0-1a1d-43d5-8f78-14d604a7b1fa%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> > > > -- > https://beagleboard.org/about - a 501c3 non-profit educating around open > hardware computing > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to a topic in the > Google Groups "BeagleBoard" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/beagleboard/TyaYiVQkscM/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CA%2BT6QPnjG32_3QgsYZxhNOx428MxKznSg6N7gV7oyfO8WUmEAg%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CA%2BT6QPnjG32_3QgsYZxhNOx428MxKznSg6N7gV7oyfO8WUmEAg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. 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