dmacu is an emulator for a simple hypothetical RISC-like processor intended to run on an ARM platform including a PL080 DMA controller.
The dmacu emulator itself executes on a DMA channel of the host system's PL080 DMA controller. Interaction from the host system's ARM core
is only needed to configure and start the DMA channel on which dmacu executes. No further interaction is needed from the host system's ARM
core once the DMA channel is up and running. The dmacu emulator remains operational while the host system's ARM core is in an active sleep
state (WFI/WFE), or while the ARM core is halted via an external debug interface.