There are two miscellaneous signals:
Figure 2.1 shows the miscellaneous signals that the TZASC provides.
Asserting secure_boot_lock enhances the security of the TZASC. See Preventing writes to registers and using secure_boot_lock.
You can program the TZASC to assert tzasc_int when it denies an AXI master access to a region. See Denied AXI transactions.