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ADFSR, Auxiliary Data Fault Status Register

The ADFSR characteristics are:

Purpose

Provides additional IMPLEMENTATION DEFINED fault status information for Data Abort exceptions taken to EL1 modes, and EL3 modes when EL3 is implemented and is using AArch32.

Configuration

AArch32 System register ADFSR bits [31:0] are architecturally mapped to AArch64 System register AFSR0_EL1[31:0] .

This register is present only when AArch32 is supported at any Exception level. Otherwise, direct accesses to ADFSR are UNDEFINED.

Attributes

ADFSR is a 32-bit register.

Field descriptions

The ADFSR bit assignments are:

313029282726252423222120191817161514131211109876543210
IMPLEMENTATION DEFINED

IMPLEMENTATION DEFINED, bits [31:0]

IMPLEMENTATION DEFINED.

On a Warm reset, thisThis field resets to an architecturally UNKNOWN value.

Accessing the ADFSR

Accesses to this register use the following encodings:

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

coprocopc1CRnCRmopc2
0b11110b0000b01010b00010b000

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T5 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T5 == '1' then AArch32.TakeHypTrapException(0x03); elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TRVM == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TRVM == '1' then AArch32.TakeHypTrapException(0x03); elsif HaveEL(EL3) && ELUsingAArch32(EL3) then return ADFSR_NS; else return ADFSR; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && ELUsingAArch32(EL3) then return ADFSR_NS; else return ADFSR; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then return ADFSR_S; else return ADFSR_NS;

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

coprocopc1CRnCRmopc2
0b11110b0000b01010b00010b000

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T5 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T5 == '1' then AArch32.TakeHypTrapException(0x03); elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TVM == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TVM == '1' then AArch32.TakeHypTrapException(0x03); elsif HaveEL(EL3) && ELUsingAArch32(EL3) then ADFSR_NS = R[t]; else ADFSR = R[t]; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && ELUsingAArch32(EL3) then ADFSR_NS = R[t]; else ADFSR = R[t]; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then ADFSR_S = R[t]; else ADFSR_NS = R[t];




3001/0907/2020 15:0757; ccead0cb9f089f9ceec50268e82aec9e7104721180324f0b9997bede489cc15ad1565345720bcd2a

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