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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] .
If EL2 is not implemented, this register is RES0 from EL3.
RW fields in this register reset to architecturally UNKNOWN values.
Attributes
HACTLR is a 32-bit register.
Field descriptions
The HACTLR bit assignments are:
| 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 | |||||||||||||||||||||||||||||||
IMPLEMENTATION DEFINED, bits [31:0]
IMPLEMENTATION DEFINED.
This field resets to an architecturally UNKNOWN value.
Accessing the HACTLR
Accesses to this register use the following encodings:
MRC{<c>}{<q>} <coproc>, {#}<opc1>, <Rt>, <CRn>, <CRm>{, {#}<opc2>}
| coproc | opc1 | CRn | CRm | opc2 |
|---|---|---|---|---|
| 0b1111 | 0b100 | 0b0001 | 0b0000 | 0b001 |
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>}
| coproc | opc1 | CRn | CRm | opc2 |
|---|---|---|---|---|
| 0b1111 | 0b100 | 0b0001 | 0b0000 | 0b001 |
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];