ICC_BPR1_EL1, Interrupt Controller Binary Point Register 1, EL1
ICC_BPR1_EL1 defines the point at which the priority value fields split into two parts, the group priority field and the subpriority field. The group priority field determines Group 1 interrupt preemption.
Bit field descriptions
ICC_BPR1_EL1 is a 32-bit register and is part of:
- The GIC system registers functional group.
- The GIC control registers functional group.
Figure B4-2 ICC_BPR1_EL1 bit assignments
- RES0, [31:3]
- BinaryPoint, [2:0]
The value of this field controls how the 8-bit interrupt priority field is split into a group priority field, that determines interrupt preemption, and a subpriority field.
The minimum value implemented of ICC_BPR1_EL1 Secure register is
The minimum value implemented of ICC_BPR1_EL1 Non-secure register is
Bit fields and details that are not provided in this description are architecturally defined. See the Arm® Generic Interrupt Controller Architecture Specification.