On 13 June 2016 at 03:18, Sudeep Holla <sudeep.holla@xxxxxxx> wrote: > > > On 12/06/16 22:57, Mathieu Poirier wrote: >> >> On 6 June 2016 at 09:59, Sudeep Holla <sudeep.holla@xxxxxxx> wrote: >>> >>> Most of the debug-related components on Juno are located in the coreSight >>> subsystem while others are located in the Cortex-Axx clusters, the SCP >>> subsystem, and in the main system. >>> >>> Each core in the two processor clusters contain an Embedded Trace >>> Macrocell(ETM) which generates real-time trace information that trace >>> tools can use and an ATB trace output that is sent to a funnel before >>> going to the CoreSight subsystem. >>> >>> The trace output signals combine with two trace expansions using another >>> funnel and fed into the Embedded Trace FIFO(ETF0). >>> >>> The output trace data stream of the funnel is then replicated before it >>> is sent to either the: >>> - Trace Port Interface Unit(TPIU), that sends it out using the trace >>> port. >>> - ETR that can write the trace data to memory located in the application >>> memory space >> >> >> Hi Sudeep, >> >> Did you try booting this on juno-r0? On my side the system won't boot >> unless I enable the debug power domain by externally connecting to the >> system using DS-5. >> > > As you have already realized that you need SCPI power domain patches for > the functionality. However, in absence of those patches or when it's > disabled, it shouldn't cause any boot or runtime issues. Only ETM or > coresight won't work. If it's causing any crash or hang, please do let > me know, that needs to be fixed. I have only tested with latest > firmware. Let me know the details of hang/crash and firmware version you > are using. We have a problem then. Booting with this branch[1] and the 3 DT patches from this set the system hangs. But before going any further I'd bet the FW on my board is too old. This is what I get on my side: RM V2M-Juno Boot loader v1.0.0 HBI0262 build 1684 ARM V2M_Juno Firmware v1.3.4 Build Date: Aug 27 2015 Time : 14:44:50 Date : 13:06:2016 Press Enter to stop auto boot... What version are you using? In the mean time I'm digging up your SCPI patches... Thanks, Mathieu [1]. https://git.linaro.org/kernel/coresight.git/ (branch next) > > -- > Regards, > Sudeep -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
