AMEVCNTVOFF0<n>

This register is present only when FEAT_AMUv1p1 is implemented. Otherwise, direct accesses to AMEVCNTVOFF0<n>_EL2 are UNDEFINED.

Attributes

Field descriptions

Bits [63:0]

Accessing AMEVCNTVOFF0<n>_EL2

If <n> is not 0, 2 or 3, reads and writes of AMEVCNTVOFF0<n>_EL2 are UNDEFINED.

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

MRS <Xt>, AMEVCNTVOFF0<m>_EL2 ; Where m = 0-15

op0	op1	CRn	CRm	op2
0b11	0b100	0b1101	0b100:m[3]	m[2:0]

integer m = UInt(CRm<0>:op2<2:0>); if m >= 4 then UNDEFINED; elsif !(m IN {0, 2, 3}) then UNDEFINED; elsif PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'1x1'} then X[t, 64] = NVMem[0xA00 + (8 * m)]; elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && CPTR_EL3.TAM == '1' then UNDEFINED; elsif HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.AMVOFFEN == '0' then UNDEFINED; elsif HaveEL(EL3) && SCR_EL3.AMVOFFEN == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && CPTR_EL3.TAM == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else X[t, 64] = AMEVCNTVOFF0_EL2[m]; elsif PSTATE.EL == EL3 then X[t, 64] = AMEVCNTVOFF0_EL2[m];

MSR AMEVCNTVOFF0<m>_EL2, <Xt> ; Where m = 0-15

op0	op1	CRn	CRm	op2
0b11	0b100	0b1101	0b100:m[3]	m[2:0]

integer m = UInt(CRm<0>:op2<2:0>); if m >= 4 then UNDEFINED; elsif !(m IN {0, 2, 3}) then UNDEFINED; elsif PSTATE.EL == EL0 then UNDEFINED; elsif PSTATE.EL == EL1 then if EffectiveHCR_EL2_NVx() IN {'1x1'} then NVMem[0xA00 + (8 * m)] = X[t, 64]; elsif EffectiveHCR_EL2_NVx() IN {'xx1'} then AArch64.SystemAccessTrap(EL2, 0x18); else UNDEFINED; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && CPTR_EL3.TAM == '1' then UNDEFINED; elsif HaveEL(EL3) && EL3SDDUndefPriority() && SCR_EL3.AMVOFFEN == '0' then UNDEFINED; elsif HaveEL(EL3) && SCR_EL3.AMVOFFEN == '0' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); elsif HaveEL(EL3) && CPTR_EL3.TAM == '1' then if EL3SDDUndef() then UNDEFINED; else AArch64.SystemAccessTrap(EL3, 0x18); else AMEVCNTVOFF0_EL2[m] = X[t, 64]; elsif PSTATE.EL == EL3 then AMEVCNTVOFF0_EL2[m] = X[t, 64];

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
Virtual offset
Virtual offset

AMEVCNTVOFF0<n>_EL2, Activity Monitors Event Counter Virtual Offset Registers 0, n = 0 - 15