B4.16 ICV_BPR1_EL1, Interrupt Controller Virtual Binary Point Register 1, EL1
ICV_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 virtual Group 1 interrupt
preemption.
Bit field descriptions
ICV_BPR1_EL1 is a 32-bit register and is part of the virtual GIC system registers functional group.
31
0
2
3
BinaryPoint
RES0
Figure B4-9 ICV_BPR1_EL1 bit assignments
RES0, [31:3]
Reserved, RES0.
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 that is implemented of ICV_BPR1_EL1 Secure register is 0x2.
The minimum value that is implemented of ICV_BPR1_EL1 Non-secure register is 0x3.
Bit fields and details that are not provided in this description are architecturally defined. See the Arm
®
Generic Interrupt Controller Architecture Specification.
B4 GIC registers
B4.16 ICV_BPR1_EL1, Interrupt Controller Virtual Binary Point Register 1, EL1
100798_0300_00_en Copyright © 2016–2018 Arm Limited or its affiliates. All rights
reserved.
B4-332
Non-Confidential
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