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Hmmmm. So the reason I'm having trouble DMAing my SFTP traffic to the crypto accelerator is that DMA1 can't access DTCM, where the data lives.

So do I ...

1) give up and say this is the limit
2) move the working buffer into AXI SRAM to enable use of DMA1, but now it's not in TCM so other access is slower?
3) try to use the MDMA here instead of regular DMA
4) give up on the integrated AES and build something in FPGA
5) something else