HACTLR, Hyp Auxiliary Control Register

The HACTLR characteristics are:

Purpose

Controls IMPLEMENTATION DEFINED features of Hyp mode operation.

Configuration

AArch32 System register HACTLR bits [31:0] are architecturally mapped to AArch64 System register ACTLR_EL2[31:0].

This register is present only when AArch32 is supported. Otherwise, direct accesses to HACTLR are UNDEFINED.

If EL2 is not implemented, this register is RES0 from EL3.

Attributes

HACTLR is a 32-bit register.

Field descriptions

313029282726252423222120191817161514131211109876543210
IMPLEMENTATION DEFINED

IMPLEMENTATION DEFINED, bits [31:0]

IMPLEMENTATION DEFINED.

The reset behavior of this field is:

Accessing HACTLR

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

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

coprocopc1CRnCRmopc2
0b11110b1000b00010b00000b001

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T1 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T1 == '1' then AArch32.TakeHypTrapException(0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then return HACTLR; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then UNDEFINED; else return HACTLR;

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

coprocopc1CRnCRmopc2
0b11110b1000b00010b00000b001

if PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EL2Enabled() && !ELUsingAArch32(EL2) && HSTR_EL2.T1 == '1' then AArch64.AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && ELUsingAArch32(EL2) && HSTR.T1 == '1' then AArch32.TakeHypTrapException(0x03); else UNDEFINED; elsif PSTATE.EL == EL2 then HACTLR = R[t]; elsif PSTATE.EL == EL3 then if SCR.NS == '0' then UNDEFINED; else HACTLR = R[t];


30/09/2021 14:53; 092b4e1bbfbb45a293b198f9330c5f529ead2b0f

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