Date: Tue, 23 Aug 2016 10:03:41 +0200 From: Arne Ehrlich <inbox@groknet.de> To: freebsd-arm@freebsd.org Subject: Beaglebone Black PRU driver crash. Message-ID: <CAG5wTg_ofvVh4qhY=Cn=9MVcN6=xCWxYQVKzp0=D1a7ZkS7Udg@mail.gmail.com>
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Hello Everyone, I=E2=80=99m currently working on an embedded project using the BBB as a bas= e platform, and i want do decide if ill go with Linux or freebsd. After not having much success talking to the BBB PRU using Linux, ich wanted to give FreeBSD a try and the PRU gets detected (^-^) sadly the driver panics upon use, and i have no idea how to debug this. i use devel/pructl to load a file and waiting for an PRU interrupt ( pructl -w ) the binary loaded does not matter, you may use some null bytes. to reproduce. FreeBSD beaglebone 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r303880: Tue Aug 9 23:54:55 UTC 2016 root@releng1.nyi.freebsd.org:/usr/obj/arm.armv6/usr/src/sys/BEAGLEBONE arm the pru is detected on boot: ti_pruss0: <TI Programmable Realtime Unit Subsystem> mem 0x4a300000-0x4a37ffff on simplebus0 (kgdb) bt #0 0xc066c340 in savectx () #1 0xc03a3038 in doadump () #2 0xc0245aac in db_dump () #3 0xc0245854 in db_command () #4 0xc02455d4 in db_command_loop () #5 0xc0248894 in db_trap () #6 0xc03e0a80 in kdb_trap () #7 0xc066df40 in undefinedinstruction () #8 0xc06548d4 in exception_exit () #9 0xc03e0334 in kdb_enter () #10 0xc03a3264 in vpanic () #11 0xc03a32b8 in panic () #12 0xc038acb0 in __mtx_assert () #13 0xc0363a68 in knlist_add () #14 0xc0686ec0 in ti_pruss_kqfilter () #15 0xc02ccf1c in devfs_kqfilter_f () #16 0xc0361a94 in kqueue_register () #17 0xc03625dc in kqueue_kevent () #18 0xc03624c4 in kern_kevent_fp () #19 0xc03623b4 in kern_kevent () #20 0xc03621e8 in sys_kevent () #21 0xc066cbfc in swi_handler () #22 0xc0654864 in swi_exit () sadly i don't have the symbols for this build to dig deeper. any ideas what might be the problem? anyone using the PRU with FreeBDS? Greetings, any help or insights woud be greatly appreciated ;-) Arne
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