Security configuration for channel 9. Control whether this channel performs Secure/Non-secure and Privileged/Unprivileged bus accesses.
If this channel generates bus accesses of some security level, an access of at least that level (in the order S+P > S+U > NS+P > NS+U) is required to program, trigger, abort, check the status of, interrupt on or acknowledge the interrupt of this channel.
This register automatically locks down (becomes read-only) once software starts to configure the channel.
This register is world-readable, but is writable only from a Secure, Privileged context.
| P | Privileged channel. If 1, this channel performs Privileged bus accesses. If 0, it performs Unprivileged bus accesses. If 1, this channel is controllable only from a Privileged context of the same Secure/Non-secure level, or any context of a higher Secure/Non-secure level. |
| S | Secure channel. If 1, this channel performs Secure bus accesses. If 0, it performs Non-secure bus accesses. If 1, this channel is controllable only from a Secure context. |
| LOCK | LOCK is 0 at reset, and is set to 1 automatically upon a successful write to this channel’s control registers. That is, a write to CTRL, READ_ADDR, WRITE_ADDR, TRANS_COUNT and their aliases. Once its LOCK bit is set, this register becomes read-only. A failed write, for example due to the write’s privilege being lower than that specified in the channel’s SECCFG register, will not set the LOCK bit. |