SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
There is no built-in firewall to protect the on-chip and external memory regions. MSMC relies on the system distributed firewall structure to protect these memory windows. MSMC receives a "pass/fail" attribute on each of its entry points which it uses to route the transaction to either the addressed endpoint (pass) or to the internal null slave (fail). Transactions carrying the "fail" return Protection Error on read or write status. Since these failed transactions route through the null slave endpoint no snoops, allocations, or other hardware side-effects occur as a result of these transactions.