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rshal2's avatar
rshal2
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Enabling bridges - When and How ?

I find the following warning: " Note: Before re-programming the FPGA fabric, make sure that the FPGA2HPS bridges (f2sdram, axi) are disabled, and that there is no software on HPS that may access th...
rshal2's avatar
rshal2
Icon for Occasional Contributor rankOccasional Contributor
7 years ago

Hello,

We don't have bootloader, just running preloader and baremetal.

In such case how does fpga2sdram get enabled ?

Thank you

  • EBERLAZARE_I_Intel's avatar
    EBERLAZARE_I_Intel
    Icon for Regular Contributor rankRegular Contributor
    7 years ago

    Hi,

    Okay, you can enable them from preloader as it checks the status of the FPGA and automatically enables bridges configured in Platform Designer (QSYS) and the BSP if the FPGA is configured.

    Remember the "bridge_enable_handoff" command? This can be run from the U-boot command prompt to enable bridges. This command puts the HPS and SDRAM into a safe state before enabling all bridges after appropriate checks.

    Regards.