How to configure Zephyr SMP Example to execute from internal memory (L2-LIM) on Icicle Kit ?

[ChrRudel]

I would like to modify the SMP Zephyr application example to run from internal memory (L2-LIM@0x0800_0000).

Currently the Zephyr SMP example seems to run from external Memory.

"..../build/zephyr/.config" contains:
CONFIG_SRAM_BASE_ADDRESS=0x80000000 (start of external DDR cached access address range)

Below what I have tried.

Changed project configuration file for the SMP example as follows:

.../PfSoC_Zephyr/polarfire-soc-zephyr-applications/mpfs-applications/smp/pi/prj.conf

CONFIG_SRAM_SIZE=512
CONFIG_SRAM_BASE_ADDRESS=0x08000000

Example builds without errors:
...
[100%] Linking C executable zephyr.elf
Memory region Used Size Region Size %age Used
RAM: 212428 B 512 KB 40.52%
IDT_LIST: 0 GB 2 KB 0.00%

Entry point is 0x8000000 as expected:

readelf -l zephyr.elf

Elf file type is EXEC (Executable file)
Entry point 0x8000000
...

When I am starting the "smp_pi_debug" debug configuration and select "Resume" two times, I don't get any UART output on Interface0.

For comparison, Interface0 outputs the PI calculation values as expected when using the default example configuration (CONFIG_SRAM_BASE_ADDRESS=0x80000000).

Are there any further changes required besides CONFIG_SRAM_BASE_ADDRESS to run the SMP example inside L2-LIM ?

friendly regards,
Christian

[con-pax]

Hi @ChrRudel we are looking into this and will prepare an example
on how to run an application from Scratchpad.