Accessing the custom carrier board registers using devmem2 for PRBS testing

Autonomous Machines Jetson & Embedded Systems Jetson AGX Orin
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1

Hi Team ,

we are accessing the registers of custom carrier board with nvidia SOM module(jetson agx orin) board.

when we access the registers using the devmem2 tool getting the below error.

jetson@tegra-ubuntu:~$ sudo devmem2 0x15A31C40
[sudo] password for jetson: 
/dev/mem opened.
Memory mapped at address 0xffff8d958000.
Value at address 0x15A31C40 (0xffff8d958c40): 0xFFFFFFFF
[ 6300.684787] CPU:0, Error: cbb-fabric@0x13a00000, irq=34
jetson@tegra-ubuntu:~$ [ 6300.690188] **************************************
[ 6300.695112] CPU:0, Error:cbb-fabric, Errmon:2
[ 6300.699594]    Error Code            : FIREWALL_ERR
[ 6300.703718] 
[ 6300.705251]    Error Code            : FIREWALL_ERR
[ 6300.709364]    MASTER_ID             : CCPLEX
[ 6300.712855]    Address               : 0x15a31c40
[ 6300.716525]    Cache                 : 0x0 -- Device Non-Bufferable
[ 6300.721717]    Protection            : 0x2 -- Unprivileged, Non-Secure, Data Access
[ 6300.728683]    Access_Type           : Read
[ 6300.732176]    Access_ID             : 0x15
[ 6300.732178]    Fabric                : cbb-fabric
[ 6300.739076]    Slave_Id              : 0x3
[ 6300.742212]    Burst_length          : 0x0
[ 6300.745703]    Burst_type            : 0x1
[ 6300.749019]    Beat_size             : 0x3
[ 6300.752243]    VQC                   : 0x0
[ 6300.755026]    GRPSEC                : 0x7e
[ 6300.758076]    FALCONSEC             : 0x0
[ 6300.761301]  **************************************
[ 6300.766343] WARNING: CPU: 0 PID: 0 at drivers/soc/tegra/cbb/tegra234-cbb.c:577 tegra234_cbb_isr+0x130/0x170
[ 6300.776561] ---[ end trace 851af04da9f90d6b ]---

Please help in resolving the issue . 

Thanks
Ramesh
7

hello ramesh.chr16,

according to the error, it’s blocked by OEM firewall.

please see-also Topic 234321 for the steps to add firewall settings for un-blocking access to NVCSI/VI registers, then you should full-flash image on AGX Orin.

9

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