MPAM0_EL1

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MPAM0_EL1, MPAM0 Register (EL1)

Purpose

Holds information to generate MPAM labels for memory requests when executing at EL0.

Configuration

This register is present only when FEAT_MPAM is implemented. Otherwise, direct accesses to MPAM0_EL1 are UNDEFINED.

If FEAT_MPAM is implemented, EL2 is implemented and enabled in the current Security state, and the MPAM virtualization option is present, then:

Attributes

Field descriptions

Bits [63:48]

PMG_D, bits [47:40]

PMG_I, bits [39:32]

PARTID_D, bits [31:16]

PARTID_I, bits [15:0]

Accessing MPAM0_EL1

None of the fields in this register are permitted to be cached in a TLB.

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

MRS <Xt>, MPAM0_EL1

op0	op1	CRn	CRm	op2
0b11	0b000	0b1010	0b0101	0b001

if !IsFeatureImplemented(FEAT_MPAM) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then Undefined(); elsif HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif EL2Enabled() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM2_EL2().TRAPMPAM0EL1 == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else X{64}(t) = MPAM0_EL1(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then Undefined(); elsif HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else X{64}(t) = MPAM0_EL1(); end; elsif PSTATE.EL == EL3 then X{64}(t) = MPAM0_EL1(); end;

MSR MPAM0_EL1, <Xt>

op0	op1	CRn	CRm	op2
0b11	0b000	0b1010	0b0101	0b001

if !IsFeatureImplemented(FEAT_MPAM) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then Undefined(); elsif HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif EL2Enabled() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM2_EL2().TRAPMPAM0EL1 == '1' then AArch64_SystemAccessTrap(EL2, 0x18); else MPAM0_EL1() = X{64}(t); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then Undefined(); elsif HaveEL(EL3) && (IsFeatureImplemented(FEAT_MPAMv0p1) || IsFeatureImplemented(FEAT_MPAMv1p0)) && MPAM3_EL3().TRAPLOWER == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; else MPAM0_EL1() = X{64}(t); end; elsif PSTATE.EL == EL3 then MPAM0_EL1() = X{64}(t); end;

63	62	61	60	59	58	57	56	55	54	53	52	51	50	49	48	47	46	45	44	43	42	41	40	39	38	37	36	35	34	33	32
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
RES0																PMG_D								PMG_I
PARTID_D																PARTID_I