SOPC Builder Warning (Tightly Coupled Memory)

Hello Chris72

Yes, i know, that SOPC Builder will generate the system even if this warning is present.

I'am working with this design and its running without problems.

And i know too, the reason to reduce or simplify the address decoder logic.

But i think this warning is a software bug from SOPC builder.

The Nios II address range is 0x00000000 - 0xffffffff (32 bit)

i have a 64 MByte SDR-Memory at 0x08000000 to 0x0fffffff ( 128 MByte ).

Data Master and Instruction Master is connected to this memory.

The warning says,

"Generating non-optimal logic for tightly_coupled_data_master_0 due to memory map overlap with data_master (0xffffffff - 0x0c101fff)"

Non optimal is ok. The Address for the TCD-Master in my design is 0x01011000. This could be optimized.

But i don't understand the overlap.

If this warning is real there must be an address overlap from 0x0c101fff to 0x0fffffff with the SDR-Memory.

If this overlap is real, SOPC Builder has to generate an error.

Is that right ?