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How to change kernel base address in ZedBoard

prasannakotrappa

Hi There,

I am new to petalinux and  trying to configure petalinux on zynq 7000.

My Zynq PL section is programmed for DRAM address 0x40000000 to 7FFFFFFF, and tested its working in bare metal. However, now I want Petalinux to see PL address(0x40000000 to 7FFFFFFF) as the DRAM.

When I executed below petalinux-config command, I am unable to change kernel base address and System memory base address to 0x40000000 under Subsystem AUTO Hardware Setting, It says "You have made an invalid entry."

"petalinux-config --get-hw-description=</projects/zynq70000_ps-pl>"

I followed this article which tries to achieve similar goal but still no luck, https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842219/Zynq-7000+AP+SoC+-+32+Bit+DDR+Access+with+ECC+Tech+Tip

please help me how to get this working, I am stuck here since 2 weeks.

PS: I am using vivado 2020.1

 

Regards,

Prasanna

  • This Xilinx forum post, although for a MicroBlaze CPU, seems to describe what you want to do:

    https://forums.xilinx.com/t5/Embedded-Linux/Moving-kernel-base-address/td-p/1001835

     

    --Tom

  • in reply to narrucmot

    Hello,

    Thanks for your response,

    I tried that, but my case is different,

     

    Let me describe my design clearly, I have a address translation device in my PL and I want all the memory request has to passed through the PL and PL will access the DDR for read/store.

    I am currently working on Zedboard,

    whose DDR address is from 0x00000000 to 0x3FFFFFFF and

    my PL address range is from 0x40000000 to 0x7FFFFFFF.

    I tested working of this design in Vitis, and confirmed that if I write anything in the address range from 0x40000000 to 0x7FFFFFFF, it is will go through my PL and it writes to DDR in the backend(Exactly how I wanted).

    Now I am trying to boot petalinux and wants petalinux to write to address only to my PL address range,

    Here's the steps I followed,

    petalinux-create -t project -s avnet-digilent-zedboard-v2020.1-final.bsp

    petalinux-config --get-hw-description=<path to my xsa>

    When I executed petalinux-config command, I could not change kernel base address and System memory base address to 0x40000000 under Subsystem AUTO Hardware Setting, It says "You have made an invalid entry." so I kept them as it is i.e. kernel base address 0x0.

    However, I modified system-user.dtsi file as mentioned by @aravindb , and it looks like this,

    /include/ "system-conf.dtsi"
    / {
    /* PS DDR Range <0x00 0x00 0x00 0x7ff00000> */
    /* PL DDR Range <0x04 0x00 0x01 0x00>  */
    memory {
    device_type = "memory";
    reg = <0x40000000 0x3fffffff>;
    };

    };

    Built the project using the below command,

    petalinux-build

    petalinux-package --boot --fsbl images/linux/zynq_fsbl.elf --fpga /<path to bit stream>design_1_wrapper.bit --u-boot

    I copied BOOT.BIN boot.scr image.ub system.dtb files from /image/linux directory to SD card and tried to boot on the board, below is the error what I get,

    U-Boot 2020.01 (Sep 16 2020 - 09:17:15 +0000)

    CPU: Zynq 7z020
    Silicon: v3.1
    Model: Zynq Zed Development Board
    DRAM: ECC disabled 1024 MiB
    Flash: 0 Bytes
    NAND: 0 MiB
    MMC: mmc@e0100000: 0
    Loading Environment from SPI Flash... SF: Detected s25fl256s1 with page size 256 Bytes, erase size 64 KiB, total 32 MiB
    *** Warning - bad CRC, using default environment

    In: serial@e0001000
    Out: serial@e0001000
    Err: serial@e0001000
    Net:
    ZYNQ GEM: e000b000, mdio bus e000b000, phyaddr 0, interface rgmii-id

    Warning: ethernet@e000b000 using MAC address from DT
    eth0: ethernet@e000b000
    Hit any key to stop autoboot: 0
    switch to partitions #0, OK
    mmc0 is current device
    Scanning mmc 0:1...
    Found U-Boot script /boot.scr
    2010 bytes read in 49 ms (40 KiB/s)
    ## Executing script at 43000000
    ** Reading file would overwrite reserved memory **
    Wrong Image Format for bootm command
    ERROR: can't get kernel image!
    SCRIPT FAILED: continuing...
    ## Executing script at 43000000
    ** Reading file would overwrite reserved memory **
    Wrong Image Format for bootm command
    ERROR: can't get kernel image!
    SCRIPT FAILED: continuing...
    switch to partitions #0, OK
    mmc0 is current device
    Scanning mmc 0:1...
    Found U-Boot script /boot.scr
    2010 bytes read in 49 ms (40 KiB/s)
    ## Executing script at 43000000
    ** Reading file would overwrite reserved memory **
    Wrong Image Format for bootm command
    ERROR: can't get kernel image!
    SCRIPT FAILED: continuing...
    MMC Device 1 not found
    no mmc device at slot 1
    SF: Detected s25fl256s1 with page size 256 Bytes, erase size 64 KiB, total 32 MiB
    device 0 offset 0xfc0000, size 0x40000
    SF: 262144 bytes @ 0xfc0000 Read: OK
    ## Executing script at 43000000
    Wrong image format for "source" command
    SCRIPT FAILED: continuing...


    no devices available
    SCRIPT FAILED: continuing...
    ## Executing script at 43000000
    Wrong image format for "source" command
    SCRIPT FAILED: continuing...
    starting USB...
    Bus usb@e0002000: USB EHCI 1.00
    scanning bus usb@e0002000 for devices... 1 USB Device(s) found
    scanning usb for storage devices... 0 Storage Device(s) found

    Device 0: unknown device

    Device 1: unknown device
    ethernet@e000b000 Waiting for PHY auto negotiation to complete................

    _------------------------------------------------------------------------

    How do I fix this, or did I miss something ??

    Regards,

    Prasanna