GICR_INMIR0, Non-maskable Interrupt Register 0

The GICR_INMIR0 characteristics are:

Purpose

Controls whether the corresponding SGI or PPI has the non-maskable property.

Configuration

This register is present only when GICD_TYPER.NMI == 1. Otherwise, direct accesses to GICR_INMIR0 are RES0.

A copy of this register is provided for each Redistributor.

Attributes

GICR_INMIR0 is a 32-bit register.

Field descriptions

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
nmi31	nmi30	nmi29	nmi28	nmi27	nmi26	nmi25	nmi24	nmi23	nmi22	nmi21	nmi20	nmi19	nmi18	nmi17	nmi16	nmi15	nmi14	nmi13	nmi12	nmi11	nmi10	nmi9	nmi8	nmi7	nmi6	nmi5	nmi4	nmi3	nmi2	nmi1	nmi0

nmi<x>, bit [x], for x = 31 to 0

Non-maskable property.

nmi<x>	Meaning
0b0	Interrupt does not have the non-maskable property.
0b1	Interrupt has the non-maskable property.

The reset behavior of this field is:

On a GIC reset, this field resets to '0'.

Additional information

If affinity routing is disabled for the Security state of an interrupt, the bit is RES0.

This bit is RES0 when the corresponding interrupt is configured as Group 0.

Accessing GICR_INMIR0

Bits corresponding to unimplemented interrupts are RAZ/WI.

When GICD_CTLR.DS==0, bits corresponding to Group 0 and Secure Group 1 interrupts are RAZ/WI to Non-secure accesses.

Note

Implementations must ensure that an interrupt that is pending at the time of the write uses either the old value or the new value and must ensure that the interrupt is neither lost nor handled more than one time. The effect of the change must be visible in finite time.

GICR_INMIR0 can be accessed through the memory-mapped interfaces:

Component	Frame	Offset	Instance
GIC Redistributor	SGI_base	0x0F80	GICR_INMIR0

Accesses to this register are RW.

15/12/2024 22:27; 5e0a212688c6bd7aee92394b6f5e491b4d0fee1d