GICR_INVLPIR, Redistributor Invalidate LPI Register

The GICR_INVLPIR characteristics are:

Purpose

Invalidates the cached configuration data of a specified LPI, causing the GIC to reload the interrupt configuration from the appropriate LPI Configuration table.

Configuration

A copy of this register is provided for each Redistributor.

Attributes

GICR_INVLPIR is a 64-bit register.

Field descriptions

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
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
V	RES0															vPEID
INTID

V, bit [63]
When GICv4.1 is implemented:

Indicates whether the INTID is virtual or physical.

V	Meaning
0b0	Invalidate is for a physical INTID.
0b1	Invalidate is for a virtual INTID.

Otherwise:

Reserved, RES0.

Bits [62:48]

Reserved, RES0.

vPEID, bits [47:32]
When GICv4.1 is implemented:

When GICR_INVLPIR.V == 0, this field is RES0

When GICR_INVLPIR.V == 1, this field is the target vPEID of the invalidate.

Note

The size of this field is IMPLEMENTATION DEFINED, and is specified by the GICD_TYPER2.VIL and GICD_TYPER2.VID fields. Unimplemented bits are RES0.

Otherwise:

Reserved, RES0.

INTID, bits [31:0]

The INTID of the LPI to be invalidated.

Note

The size of this field is IMPLEMENTATION DEFINED, and is specified by the GICD_TYPER.IDbits field. Unimplemented bits are RES0.

Additional information

Note

If any LPI has been forwarded to the PE and a valid write to GICR_INVLPIR is received, the Redistributor must ensure it reloads its properties from memory and apply any changes by retrieving and reforwarding the LPI as required. This has no effect on the forwarded LPI if it has already been activated.

Accessing GICR_INVLPIR

When written with a 32-bit write the data is zero-extended to 64 bits.

This register is mandatory when any of the following are true:

GICR_TYPER.Direct is 1.
GICR_CTLR.IR is 1.
GICv4.1 is implemented.

Otherwise, the functionality is IMPLEMENTATION DEFINED.

Writes to this register have no effect if either:

The specified LPI is not currently stored in the local Redistributor.
The INTID field corresponds to an unimplemented LPI.

GICR_INVLPIR can be accessed through the memory-mapped interfaces:

Component	Frame	Offset	Instance
GIC Redistributor	RD_base	0x00A0	GICR_INVLPIR

Accesses to this register are WO.

15/12/2024 22:27; 5e0a212688c6bd7aee92394b6f5e491b4d0fee1d

GICR_INVLPIR, Redistributor Invalidate LPI Register

Purpose

Configuration

Attributes

Field descriptions

V, bit [63]When GICv4.1 is implemented:

Otherwise:

Bits [62:48]

vPEID, bits [47:32]When GICv4.1 is implemented:

Otherwise:

INTID, bits [31:0]

Additional information

Accessing GICR_INVLPIR

GICR_INVLPIR can be accessed through the memory-mapped interfaces:

V, bit [63]
When GICv4.1 is implemented:

vPEID, bits [47:32]
When GICv4.1 is implemented: