GICC_BPR CPU Interface Binary Point Register when FEAT_GICv3_LEGACY is implemented GIC CPU interface 0x0008 GICC_BPR When GICD_CTLR.DS == '0' RW When an access is Secure RW When an access is Non-secure RW Defines the point at which the priority value fields split into two parts, the group priority field and the subpriority field. GICC In systems that support two Security states: This register is Banked. The Secure instance of this register determines Group 0 interrupt preemption. The Non-secure instance of this register determines Group 1 interrupt preemption. In systems that support only one Security state, when GICC_CTLR.CBPR == 0, this register determines only Group 0 interrupt preemption. When GICC_CTLR.CBPR == 1, this register determines interrupt preemption for both Group 0 and Group 1 interrupts. GICC_BPR is a 32-bit register. 31 3 31:3 Reserved, RES0. Binary_Point 2 0 2:0 Controls how the 8-bit interrupt priority field is split into a group priority field, that determines interrupt preemption, and a subpriority field. The following list describes how this field determines the interrupt priority bits assigned to the group priority field: 'Secure ICC_BPR1_EL1 Binary Point when CBPR == 0' in ARM® Generic Interrupt Controller Architecture Specification, GIC architecture version 3.0 and version 4.0 (ARM IHI 0069), for the processing of Group 1 interrupts in a GIC implementation that supports interrupt grouping, when GICC_CTLR.CBPR == 0. 'Non-secure ICC_BPR1_EL1 Binary Point when CBPR == 0' in ARM® Generic Interrupt Controller Architecture Specification, GIC architecture version 3.0 and version 4.0 (ARM IHI 0069), for all other cases. AU Aliasing the Non-secure GICC_BPR as GICC_ABPR in a multiprocessor system permits a PE that can make only Secure accesses to configure the preemption setting for Group 1 interrupts by accessing GICC_ABPR. This register is used only when System register access is not enabled. When System register access is enabled this register is RAZ/WI, and the System registers ICC_BPR0_EL1 and ICC_BPR1_EL1 provide equivalent functionality. 2026-03-26 20:27:25 2026-03_rel