SPRZ452I july 2018 – may 2023 AM6526 , AM6528 , AM6546 , AM6548
R5FSS: Access to CPU1 TCMs hangs in Lockstep
mode
When R5FSS is operating in Lock-step mode, only CPU0 peripherals (TCMs and other components) are used. CPU1 peripherals are unused and are kept disabled. Then, any external access (from SoC) to CPU1 peripherals will not get a response back and will result in system hang.
When R5FSS is in Lock-step mode, the software must program the firewall for the CPU1 TCM memory access port and CPU1 config port to block any transactions from the SoC level. These firewalls are present in the SoC level CBASS which connects to R5FSS.