Why do the values of the TLPBYPASS_ERR_STATUS status register of the R-Tile Avalon® Streaming Intel® FPGA IP for PCI Express persist after a system level warm reset?

Description

Due to a problem in the Intel® Quartus® Prime Pro Edition Software version 21.3 and earlier, the values stored in the TLPBYPASS_ERR_STATUS status register of the R-Tile Avalon® Streaming Intel® FPGA IP for PCI Express will persist after a system warm reset (pin_perst event) or hot reset.

A cold reset (power cycle) will clear the content of the TLPBYPASS_ERR_STATUS status register.

Resolution

To work around this problem, clear the TLPBYPASS_ERR_STATUS status register (offset 0x1310) after a warm reset using the Hard IP Reconfiguration Interface (pX_hip_reconfig_*).

Note that the Hard IP Reconfiguration Interface is 8-bit wide, making at least 3 write operations necessary to clear all the bits from the TLPBYPASS_ERR_STATUS status register. 

This problem is fixed in the Intel® Quartus® Prime Pro Edition Software v22.1.