GICC_PMR, CPU Interface Priority Mask Register

The GICC_PMR characteristics are:

Purpose

This register provides an interrupt priority filter. Only interrupts with a higher priority than the value in this register are signaled to the PE.

Note

Higher interrupt priority corresponds to a lower value of the Priority field.

This register is part of the GIC physical CPU interface registers functional group.

Usage constraints

This register is accessible as follows:

Security disabledSecureNon-secure
RWRWRW

If the GIC implementation supports two Security states:

See 'Priority control of Secure and Non-secure interrupts' in the GICv3 Architecture Specification for more information.

Configuration

RW fields in this register reset to architecturally UNKNOWN values.

This register is available in all configurations of the GIC. If the GIC implementation supports two Security states this register is Common.

Attributes

GICC_PMR is a 32-bit register.

Field descriptions

The GICC_PMR bit assignments are:

313029282726252423222120191817161514131211109876543210
000000000000000000000000Priority

Bits [31:8]

Reserved, RES0.

Priority, bits [7:0]

The priority mask level for the CPU interface. If the priority of the interrupt is higher than the value indicated by this field, the interface signals the interrupt to the PE.

If the GIC implementation supports fewer than 256 priority levels some bits might be RAZ/WI, as follows:

See Interrupt prioritization for more information.

When this register has an architecturally-defined reset value, this field resets to a value that is architecturally UNKNOWN.

Accessing the GICC_PMR

GICC_PMR can be accessed through its memory-mapped interface:

ComponentOffset
GIC CPU interface 0x0004



02/05/2017 15:43

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