HAMAIR1

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HAMAIR1, Hyp Auxiliary Memory Attribute Indirection Register 1

Purpose

Provides IMPLEMENTATION DEFINED memory attributes for the memory attribute encodings defined by HMAIR1. These IMPLEMENTATION DEFINED attributes can only provide additional qualifiers for the memory attribute encodings, and cannot change the memory attributes defined in HMAIR1.

Configuration

AArch32 System register HAMAIR1 bits [31:0] are architecturally mapped to AArch64 System register AMAIR_EL2[63:32].

This register is present only when FEAT_AA32EL2 is implemented. Otherwise, direct accesses to HAMAIR1 are UNDEFINED.

Attributes

Field descriptions

IMPLEMENTATION DEFINED, bits [31:0]

Accessing HAMAIR1

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	0b1010	0b0011	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().T10 == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HSTR().T10 == '1' then AArch32_TakeHypTrapException(0x03); else Undefined(); end; elsif PSTATE.EL == EL2 then R(t) = HAMAIR1(); elsif PSTATE.EL == EL3 then if SCR().NS == '0' then Undefined(); else R(t) = HAMAIR1(); end; end;

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

coproc	opc1	CRn	CRm	opc2
0b1111	0b100	0b1010	0b0011	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().T10 == '1' then AArch64_AArch32SystemAccessTrap(EL2, 0x03); elsif EL2Enabled() && IsFeatureImplemented(FEAT_AA32EL2) && ELUsingAArch32(EL2) && HSTR().T10 == '1' then AArch32_TakeHypTrapException(0x03); else Undefined(); end; elsif PSTATE.EL == EL2 then HAMAIR1() = R(t); elsif PSTATE.EL == EL3 then if SCR().NS == '0' then Undefined(); else HAMAIR1() = 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