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PL-based processors and PS-based processors communication

manili

Hello everyone,

 

Would someone help me find the answer to the following questions:

I have a ZCU104 board (Zynq Ultrascale+) and I want to program the PL with multiple tiny processing cores. As far as I know, the 2GB DDR4 SDRAM is connecting to the PS part of the chip, so I cannot connect my tiny processing cores to the memory directly.

1. How can I share the memory among all processing cores inside both PS (4 x ARM Cortex-A53) and PL (for example MicroBlaze or RISC-V)?

2. If it is not possible then how can these processing units talk to each other?

Thanks a lot.

P.S. Please take a look at page 24:

https://www.xilinx.com/support/documentation/boards_and_kits/zcu104/ug1267-zcu104-eval-bd.pdf

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  • There is almost no point at all in programming the FPGA part of a Zynq with lots of little processors each with access to the system DDRAM - why - because the access to the DDRAM will make a bottleneck rendering the mutiple cores useless.

     

    What you could do is give each core access to its own block RAM in the FPGA fabric. The cores need to be able to talk to each other.

     

    As Fabio has pointed out  there are many lifetimes of published work on this subject.

     

    It would be possible to help you more if you put the question into some kind of context - what are you trying to do (end goal of your project).

     

    Why do you want lots of tiny cores ?

     

    MK

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  • There is almost no point at all in programming the FPGA part of a Zynq with lots of little processors each with access to the system DDRAM - why - because the access to the DDRAM will make a bottleneck rendering the mutiple cores useless.

     

    What you could do is give each core access to its own block RAM in the FPGA fabric. The cores need to be able to talk to each other.

     

    As Fabio has pointed out  there are many lifetimes of published work on this subject.

     

    It would be possible to help you more if you put the question into some kind of context - what are you trying to do (end goal of your project).

     

    Why do you want lots of tiny cores ?

     

    MK

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