Due to a problem in the Quartus® II software version 13.1 Update 3 and later, you may see the the following critical warnings when compiling a Cyclone® V SoC HPS design.
Critical Warning: Timing analysis was performed on core hps_sdram_p0 using Quartus II v13.1 with a preliminary timing model and constraints. You must regenerate this IP in a future version of Quartus II to update the timing constraints to match the timing mode
The timing models are final for the Cyclone V SoC devices as listed in the ACDS version 13.1 Update Release Notes:
Altera Complete Design Suite Version 13.1 Update Release Notes
It is safe to ignore this critical warning.
This problem is scheduled to be fixed in a future release of the Quartus II software.