Keywords: PPC, PowerPC, 405, constraints, NGDBuild
When generating any Virtex-4 PowerPC design, I receive many warning messages like these from NGDBuild:
WARNING:ConstraintSystem:135 - Constraint <INST: UniqueName:
/system/EXPANDED/system/ppc405_0/ppc405_0\/IP...>: No instances of type FFS
were found under block
"ppc405_0/ppc405_0/IPLB0_PLBv46_Adapter_i/adapter_cs_FSM_FFd7-In11"
(type=LUT4_D).
WARNING:ConstraintSystem:135 - Constraint <INST: UniqueName:
/system/EXPANDED/system/ppc405_0/ppc405_0\/IP...>: No instances of type FFS
were found under block
"ppc405_0/ppc405_0/IPLB_DUAL_PORT.IPLB1_PLBv46_Adapter_i/adapter_cs_FSM_FFd7-
In11" (type=LUT4_D).
...
What do they mean? Could they cause any problem in my final design?