FW: zc706 bsp does not work with maximum processors as 2

[Fernando Domínguez Pousa]

Hi again,

Finally I could continue my tests on zc706 and the second processor start.

I could add two breakpoints one at _CPU_SMP_Start_processor (0x0041e7b0) and other at _Per_CPU_State_wait_for_non_initial_state (0x0041e7d4) at the end of the function  _CPU_SMP_Start_processor. Execution stops and continues in both breakpoints, but I still need to need to start the second processor from xsdb. I attach you a capture of the objdump done at the end of the mail.

> Yes I believe so. I tested the m2003 version.
Can you share me the compilation flags you use for your tests executables?
And sorry for this answer, but where can I find the m2003 version? Is it a git tag, branch.. ? I don't see anything similar on GitHub repos.

> I wonder if xsdb is doing something. Are you able to set a break point
> in the code I provided to the link to in zynq_start_bspsmp.c
Maybe the JTAG hardware could cause this...

Thanks,

-----Original Message-----
From: Chris Johns [mailto:chrisj at rtems.org]
Sent: 23 March 2020 01:58
To: Fernando Domínguez Pousa <fdpousa at gmv.com>; Sebastian Huber <sebastian.huber at embedded-brains.de>; users at rtems.org
Cc: Sebastian Wildowicz <swildowicz at gmv.com>
Subject: Re: zc706 bsp does not work with maximum processors as 2

On 2020-03-20 20:06, Fernando Domínguez Pousa wrote:
>> Thanks. Thre is something usual happening here because RTEMS contains the code needed to start the second core ....
>
> I do not understand at all. So, with the current version of the repos this should work? Am I missing something in my implementation? Because I compiled RTEMS for SMP too and I configured CONFIGURE_MAXIMUM_PROCESSORS to 2.

Yes I believe so. I tested the m2003 version.

>> If I build for SMP and set CONFIGURE_MAXIMUM_PROCESSORS to 2 my
>> applications run fine. I
>
> Did you use a zc706 board?

I tested this on custom hardware using the zc706 BSP that is booting from QSPI.

> I remember two years ago I started two processors using SMP on a zedboard without starting second core using xsdb.

I wonder if xsdb is doing something. Are you able to set a break point in the code I provided to the link to in zynq_start_bspsmp.c that starts the second process?

Chris

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