Fault Event Control Register (FECTL_REG_0_0_0_VTDBAR) – Offset 20038
Register specifying the fault event interrupt message control bits.
| Bit Range | Default | Access | Field Name and Description |
| 31 | 1h | RW | Interrupt Mask (IM) - 0 = No masking of interrupt. When an interrupt condition is detected, hardware issues an interrupt message (using the Fault Event Data and Fault Event Address register values).
- 1 = This is the value on reset. Software may mask interrupt message generation by setting this field. Hardware is prohibited from sending the interrupt message when this field is set.
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| 30 | 0h | RO/V | Interrupt Pending (IP) Hardware sets the IP field whenever it detects an interrupt condition, which is defined as: - When primary fault logging is active, an interrupt condition occurs when hardware records a fault through one of the Fault Recording registers and sets the PPF field in Fault Status register.
- When advanced fault logging is active, an interrupt condition occurs when hardware records a fault in the first fault record (at index 0) of the current fault log and sets the APF field in the Fault Status register.
- Hardware detected error associated with the Invalidation Queue, setting the IQE field in the Fault Status register.
- Hardware detected invalid Device-IOTLB invalidation completion, setting the ICE field in the Fault Status register.
- Hardware detected Device-IOTLB invalidation completion time-out, setting the ITE field in the Fault Status register.
If any of the status fields in the Fault Status register was already Set at the time of setting any of these fields, it is not treated as a new interrupt condition. The IP field is kept set by hardware while the interrupt message is held pending. The interrupt message could be held pending due to interrupt mask (IM field) being Set or other transient hardware conditions. The IP field is cleared by hardware as soon as the interrupt message pending condition is serviced. This could be due to either: - Hardware issuing the interrupt message due to either change in the transient hardware condition that caused interrupt message to be held pending, or due to software clearing the IM field.
- Software servicing all the pending interrupt status fields in the Fault Status register as follows:
- When primary fault logging is active, software clearing the Fault (F) field in all the Fault Recording registers with faults, causing the PPF field in Fault Status register to be evaluated as clear.
- Software clearing other status fields in the Fault Status register by writing back the value read from the respective fields.
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| 29:0 | 0h | RO | Reserved |