HAIFSR

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HAIFSR, Hyp Auxiliary Instruction Fault Status Register

Purpose

Provides additional IMPLEMENTATION DEFINED syndrome information for Prefetch Abort exceptions taken to Hyp mode.

Configuration

AArch32 System register HAIFSR bits [31:0] are architecturally mapped to AArch64 System register AFSR1_EL2[31:0].

This register is present only when FEAT_AA32EL2 is implemented. Otherwise, direct accesses to HAIFSR are UNDEFINED.

This is an optional register. An implementation that does not require this register can implement it as RES0.

Attributes

Field descriptions

IMPLEMENTATION DEFINED, bits [31:0]

Accessing HAIFSR

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

MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coproc	opc1	CRn	CRm	opc2
0b1111	0b100	0b0101	0b0001	0b001

if !IsFeatureImplemented(FEAT_AA32EL2) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && HSTR_EL2().T5 == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HSTR().T5 == '1' then AArch32_TakeHypTrapException(0x03); else Undefined(); end; elsif PSTATE.EL == EL2 then R(t) = HAIFSR(); elsif PSTATE.EL == EL3 then if SCR().NS == '0' then Undefined(); else R(t) = HAIFSR(); end; end;

MCR{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}

coproc	opc1	CRn	CRm	opc2
0b1111	0b100	0b0101	0b0001	0b001

if !IsFeatureImplemented(FEAT_AA32EL2) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if EL2Enabled() && IsFeatureImplemented(FEAT_AA64EL2) && !ELUsingAArch32(EL2) && HSTR_EL2().T5 == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HSTR().T5 == '1' then AArch32_TakeHypTrapException(0x03); else Undefined(); end; elsif PSTATE.EL == EL2 then HAIFSR() = R(t); elsif PSTATE.EL == EL3 then if SCR().NS == '0' then Undefined(); else HAIFSR() = R(t); end; end;

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
IMPLEMENTATION DEFINED