06:04 <borneoa_> Cortex-m has the debug unit at fixed address in its access port, so no need to specify it on to auto detect the address. SoC with multiple cortex-m use one access port per CPU.

06:07 <borneoa_> Abound 4 years ago there was one company that made a multi cortex-m soc putting all in a single access port. They hacked the arm implementation to change the base address of each debug unit. Then they realized that no tool support their soc. I have suggested how to add such feature in OpenOCD, but then no follow up