PMOVS

The unsigned overflow flags for the Cycle Count Register, PMCCNTR_EL0, and each of the implemented event counters PMEVCNTR<n>.

Configuration

External register PMOVS bits [63:0] are architecturally mapped to AArch64 System register PMOVSSET_EL0[63:0].

External register PMOVS bits [63:0] are architecturally mapped to AArch64 System register PMOVSCLR_EL0[63:0].

External register PMOVS bits [31:0] are architecturally mapped to AArch32 System register PMOVSSET[31:0].

External register PMOVS bits [31:0] are architecturally mapped to AArch32 System register PMOVSR[31:0].

This register is present only when FEAT_PMUv3_EXT64 is implemented. Otherwise, direct accesses to PMOVS are RES0.

Attributes

Field descriptions

Bits [63:33]

F0, bit [32]
When FEAT_PMUv3_ICNTR is implemented:

PMICNTR_EL0 unsigned overflow flag.

F0	Meaning
0b0	PMICNTR_EL0 has not overflowed.
0b1	PMICNTR_EL0 has overflowed.

The reset behavior of this field is:

On a Warm reset, this field resets to an architecturally UNKNOWN value.

Otherwise:

C, bit [31]

Cycle counter unsigned overflow flag.

C	Meaning
0b0	The cycle counter has not overflowed since this bit was last cleared.
0b1	The cycle counter has overflowed since this bit was last cleared.

PMCR_EL0.LC controls whether an overflow is detected from unsigned overflow of PMCCNTR_EL0[31:0] or unsigned overflow of PMCCNTR_EL0[63:0].

The reset behavior of this field is:

On a Warm reset, this field resets to an architecturally UNKNOWN value.

P<n>, bit [n], for n = 30 to 0

Event counter unsigned overflow bit for PMEVCNTR<n>_EL0.

If PMCFGR.N is less than 31, bits [30:PMCFGR.N] are RAZ/WI.

P<n>	Meaning
0b0	PMEVCNTR<n>_EL0 has not overflowed since this bit was last cleared.
0b1	PMEVCNTR<n>_EL0 has overflowed since this bit was last cleared.

If FEAT_PMUv3p5 is implemented, MDCR_EL2.HLP and PMCR_EL0.LP control whether an overflow is detected from unsigned overflow of PMEVCNTR<n>_EL0[31:0] or unsigned overflow of PMEVCNTR<n>_EL0[63:0].

The reset behavior of this field is:

On a Warm reset, this field resets to an architecturally UNKNOWN value.

Accessing PMOVS

Accesses to this register use the following encodings:

Accessible at offset 0xC90 from PMU

When DoubleLockStatus(), or !IsCorePowered(), or OSLockStatus() or !AllowExternalPMUAccess(), accesses to this register generate an error response.
Otherwise, accesses to this register are RW.

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																															F0
C	P30	P29	P28	P27	P26	P25	P24	P23	P22	P21	P20	P19	P18	P17	P16	P15	P14	P13	P12	P11	P10	P9	P8	P7	P6	P5	P4	P3	P2	P1	P0

PMOVS, Performance Monitors Overflow Flag Status register

Purpose

Configuration

Attributes

Field descriptions

Bits [63:33]

F0, bit [32]
When FEAT_PMUv3_ICNTR is implemented:

Otherwise:

C, bit [31]

P<n>, bit [n], for n = 30 to 0

Accessing PMOVS

PMOVS, Performance Monitors Overflow Flag Status register

Purpose

Configuration

Attributes

Field descriptions

Bits [63:33]

F0, bit [32]When FEAT_PMUv3_ICNTR is implemented:

Otherwise:

C, bit [31]

P<n>, bit [n], for n = 30 to 0

Accessing PMOVS

F0, bit [32]
When FEAT_PMUv3_ICNTR is implemented: