I am running into the same problem with 4.4.9-ti-r25 (debian), using the 
Makefile.

On Thursday, May 26, 2016 at 11:09:20 PM UTC+2, JD Morise wrote:
>
> Hi, 
>
> I would like to get communication up and running between ARM and PRU, by 
> following the TI Example 5 "RPMsg communication between ARM and PRU". 
>
> The system is a BBB with debian, kernel 4.1.15-ti-rt-r43. All 3 modules 
> are loaded, here is the snippet of the lsmod: 
>
> pruss_remoteproc       15296  2
> rpmsg_pru               4683  0
> virtio_rpmsg_bus       13437  1 rpmsg_pru
>
> dmesg ourput is posted below, I however don't see any problems  or errors. 
> However the device file /dev/rpmsg_pru* is not created at all, although 
> the rpmsg_host seems to be online. What am I missing? Where to look for 
> error messages or problems? 
>
> Could it be a problem with the device tree? I don't have any device tree 
> overlays loaded, apart from the cape_universaln
>
>  
> Best Regards, JD
>
> [  137.089974] pruss-rproc 4a300000.pruss: 8 PRU interrupts parsed
> [  137.090107] pruss-rproc 4a300000.pruss: memory    dram0: pa 0x4a300000 
> size 0x2000 va e0b68000
> [  137.090153] pruss-rproc 4a300000.pruss: memory    dram1: pa 0x4a302000 
> size 0x2000 va e0b6c000
> [  137.090193] pruss-rproc 4a300000.pruss: memory shrdram2: pa 0x4a310000 
> size 0x3000 va e0b70000
> [  137.090231] pruss-rproc 4a300000.pruss: memory     intc: pa 0x4a320000 
> size 0x2000 va e0b74000
> [  137.090270] pruss-rproc 4a300000.pruss: memory      cfg: pa 0x4a326000 
> size 0x2000 va e0b78000
> [  137.106091] pruss-rproc 4a300000.pruss: creating platform devices for 
> PRU cores
> [  137.117092] pru-rproc 4a334000.pru0: memory     iram: pa 0x4a334000 
> size 0x2000 va e0b7c000
> [  137.117188] pru-rproc 4a334000.pru0: memory  control: pa 0x4a322000 
> size 0x400 va e0b80000
> [  137.117231] pru-rproc 4a334000.pru0: memory    debug: pa 0x4a322400 
> size 0x100 va e0b82400
> [  137.128119]  remoteproc1: 4a334000.pru0 is available
> [  137.128152]  remoteproc1: Note: remoteproc is still under development 
> and considered experimental.
> [  137.128169]  remoteproc1: THE BINARY FORMAT IS NOT YET FINALIZED, and 
> backward compatibility isn't yet guaranteed.
> [  137.137153]  remoteproc1: powering up 4a334000.pru0
> [  137.137211]  remoteproc1: Booting fw image am335x-pru0-fw, size 79096
> [  137.137332] pru-rproc 4a334000.pru0: version 0 event_chnl_map_size 1 
> event_chnl_map 00000394
> [  137.137356] pru-rproc 4a334000.pru0: sysevt-to-ch[59] -> 1
> [  137.137375] pru-rproc 4a334000.pru0: skip intr mapping for chnl 0
> [  137.137395] pru-rproc 4a334000.pru0: chnl-to-host[1] -> 1
> [  137.137413] pru-rproc 4a334000.pru0: skip intr mapping for chnl 2
> [  137.137431] pru-rproc 4a334000.pru0: skip intr mapping for chnl 3
> [  137.137449] pru-rproc 4a334000.pru0: skip intr mapping for chnl 4
> [  137.137467] pru-rproc 4a334000.pru0: skip intr mapping for chnl 5
> [  137.137485] pru-rproc 4a334000.pru0: skip intr mapping for chnl 6
> [  137.137503] pru-rproc 4a334000.pru0: skip intr mapping for chnl 7
> [  137.137520] pru-rproc 4a334000.pru0: skip intr mapping for chnl 8
> [  137.137538] pru-rproc 4a334000.pru0: skip intr mapping for chnl 9
> [  137.137563] pruss-rproc 4a300000.pruss: SYSEV59 -> CH1 (CMR14 
> 0x01000000)
> [  137.137584] pruss-rproc 4a300000.pruss: CH1 -> HOST1 (HMR0 0x00000100)
> [  137.137607] pruss-rproc 4a300000.pruss: configured system_events = 
> 0x0800000000000000 intr_channels = 0x00000002 host_intr = 0x00000002
> [  137.137626]  remoteproc1: starting PRU0: entry-point = 0x0
> [  137.137642]  remoteproc1: remote processor 4a334000.pru0 is now up
> [  137.137798]  remoteproc1: kicking vqid 0 on PRU0
> [  137.137965] virtio_rpmsg_bus virtio0: rpmsg host is online
> [  137.138120]  remoteproc1: registered virtio0 (type 7)
> [  137.138351] pru-rproc 4a334000.pru0: PRU rproc node 
> /ocp/pruss@4a300000/pru@4a334000 probed successfully
> [  137.138733] pru-rproc 4a338000.pru1: memory     iram: pa 0x4a338000 
> size 0x2000 va e0b9c000
> [  137.138813] pru-rproc 4a338000.pru1: memory  control: pa 0x4a324000 
> size 0x400 va e0b9a000
> [  137.138855] pru-rproc 4a338000.pru1: memory    debug: pa 0x4a324400 
> size 0x100 va e0ba0400
> [  137.160141]  remoteproc2: 4a338000.pru1 is available
> [  137.160177]  remoteproc2: Note: remoteproc is still under development 
> and considered experimental.
> [  137.160194]  remoteproc2: THE BINARY FORMAT IS NOT YET FINALIZED, and 
> backward compatibility isn't yet guaranteed.
> [  137.163512] pru-rproc 4a338000.pru1: booting the PRU core manually
> [  137.163552]  remoteproc2: powering up 4a338000.pru1
> [  137.163871]  remoteproc2: Booting fw image am335x-pru1-fw, size 33580
> [  137.163953]  remoteproc2: starting PRU1: entry-point = 0x0
> [  137.163972]  remoteproc2: remote processor 4a338000.pru1 is now up
> [  137.164033] pru-rproc 4a338000.pru1: PRU rproc node 
> /ocp/pruss@4a300000/pru@4a338000 probed successfully
>
>

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