20.2.2.3.6 Misc

Use the Misc tab to enable the following options:

• Trace functionality
• JTAG (Debug) functionality
• Interrupts to/from MSS
• Configuring GPIO Interrupt Register
• Exposing Boot Status ports
• Exposing feedback ports to fabric

For more information, see PolarFire SoC FPGA MSS Technical Reference Manual .

By default, these options are marked as Unused. When any of the options are enabled, the corresponding ports are exposed on the MSS block (see the following figure).

Boot Status: When Expose Boot Status ports option is selected, the ports BOOT_FAIL_CLEAR_F2M and BOOT_FAIL_ERROR_M2F are exposed as shown in the following figure. Both the signals typically represent binary states through voltage levels and are generally synchronous with the MSS clock.

Boot_fail_error_M2F is a signal from the MSS to the FPGA fabric that indicates a boot failure has occurred. When the MSS detects the failure, it sets this signal high and informs the fabric to take action or log the issue.

Boot_Fail_Clear_F2M is a signal from the FPGA fabric to inform the MSS that the boot failure has been addressed. When the FPGA fabric handles the issue, it sets the signal high telling the MSS to clear the boot failure status.

MSS Feedback and Debug Ports: This option is only available for production devices. If selected, a group of MSS_FEEDBACK_DEBUG ports are exposed as shown in the following figure.