8.4.5.2 TZC_SYS Gate Keeper Register
Each bit in this register is associated with the filter unit with the same index.
| Name: | TZC_SYS_GATE_KEEPER |
| Offset: | 0x08 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| Access | |||||||||
| Reset |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| OPEN_STATUS[3:0] | |||||||||
| Access | R | R | R | R | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| OPEN_REQUEST[3:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
Bits 19:16 – OPEN_STATUS[3:0] Gate Keeper Open Status (read-only)
This bit is set to 0 when both of the following conditions are fulfilled:
- The gate keeper no longer permits access to its associated filter.
- All outstanding accesses through the filter unit are complete.
The gate keeper always waits for outstanding accesses to complete.
| Value | Name |
|---|---|
| 0 | The gate keeper no longer permits access to its associated filter, that is, it is closed. |
| 1 | The gate keeper permits access to its associated filter, that is, it is open. |
Bits 3:0 – OPEN_REQUEST[3:0] Gate Keeper Open Request
| Value | Name |
|---|---|
| 0 | Requests the gate of the associated filter unit to be closed. |
| 1 | Requests the gate of the associated filter unit to be open. |