Article ID: 000089898 Content Type: Compatibility Last Reviewed: 03/25/2022

Why does a u-boot hang and reset happen when the RSU command -> linux_qspi_enable -> RSU command sequence is issued from u-boot-socfpga 2021.04

Environment

  • Intel® Quartus® Prime Pro Edition
  • u-boot-socfpga

    Linux*

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    Description

    Due to a problem in the u-boot-socfpga (https://github.com/altera-opensource/u-boot-socfpga) 2021.04 software a u-boot hang followed by a reset may occur after enabling the QSPI. 

    This problem may be seen using U-Boot CLI commands:

    1.    rsu display_dcmf_version (1st RSU command)
    2.    sf probe (this is part of the linux_qspi_enable command, that enables the QSPI node in the Linux DTB, this is part of the flow followed to launch Linux ).
    3.    rsu display_dcmf_version (2nd RSU command).
    4.    A hang may occurs here,  followed by a  reset if the watchdog is enabled

    This probems occurs because the QSPI is being initialized twice, allocating memory for the QSPI device each time, without fully invalidating initial memory region. 
     

    Resolution

    This problem is fixed in u-boot-socfpga 2021.04 and later  (https://github.com/altera-opensource/u-boot-socfpga) .   Commit: a0a4a265f7395a938226b08142c4e2234fdead5e.

     

    Related Products

    This article applies to 2 products

    Intel® Agilex™ 7 FPGAs and SoC FPGAs
    Intel® Stratix® 10 FPGAs and SoC FPGAs

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