ICC_HPPIR_EL1

This register is present only when FEAT_GCIE is implemented and FEAT_AA64 is implemented. Otherwise, direct accesses to ICC_HPPIR_EL1 are UNDEFINED.

Attributes

Field descriptions

Bits [63:33]:

HPPIV, bit [32]:

HPPI valid.

There is an HPPI with Sufficient priority for the Interrupt Domain.

HPPIV	Meaning
0b0	Invalid: There is no HPPI with Sufficient priority for the Interrupt Domain.
0b1	VALID: There is an HPPI with Sufficient priority for the Interrupt Domain.

If ICC_HPPIR_EL1.HPPIV is 1, ID and TYPE together form the INTID of the HPPI for the Interrupt Domain.

TYPE, bits [31:29]:

The encoding of this field depends on the value of HPPIV as described below:

If ICC_HPPIR_EL1.HPPIV is 0, TYPE is RES0.
If ICC_HPPIR_EL1.HPPIV is 1, TYPE specifies the Type of the interrupt.

TYPE	Meaning
0b001	PPI
0b010	LPI
0b011	SPI

Values not defined above are reserved.

Bits [28:24]:

ID, bits [23:0]:

The encoding of this field depends on the value of HPPIV as described below:

If ICC_HPPIR_EL1.HPPIV is 0, ID is RES0.
If ICC_HPPIR_EL1.HPPIV is 1, ID specifies the interrupt ID.

Access Instructions

This register is Read-only.

When accessed at EL3, if SCR_EL3.{NS, NSE} select a reserved value, the behavior is CONSTRAINED UNPREDICTABLE with the permitted options:

SCR_EL3.{NS, NSE} is treated as having an UNKNOWN value.
The access is treated as a NOP.

Accesses to this register use the following encodings in the System register encoding space:

MRS <Xt>, ICC_HPPIR_EL1

(op0 = 0b11, op1 = 0b000, CRn = 0b1100, CRm = 0b1010, op2 = 0b011)

if !(IsFeatureImplemented(FEAT_GCIE) && IsFeatureImplemented(FEAT_AA64)) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EL2Enabled() && HCR_EL2().IMO == '1' && IsFeatureImplemented(FEAT_GCIE_LEGACY) && ICH_VCTLR_EL2().V3 == '1' then Undefined(); elsif EL2Enabled() && ICH_HFGRTR_EL2().ICC_HPPIR_EL1 == '0' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && HCR_EL2().IMO == '1' then X{64}(t) = ICV_HPPIR_EL1(); else X{64}(t) = ICC_HPPIR_EL1(); end; elsif PSTATE.EL == EL2 then X{64}(t) = ICC_HPPIR_EL1(); elsif PSTATE.EL == EL3 then X{64}(t) = ICC_HPPIR_EL1(); end;

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
RES0																															HPPIV
TYPE			RES0					ID

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