(old) | htmldiff from- | (new) |
The AMEVTYPER0<n> characteristics are:
Provides information on the events that an architected activity monitor event counter AMEVCNTR0<n> counts.
External register AMEVTYPER0<n> bits [31:0] are architecturally mapped to AArch64 System register AMEVTYPER0<n>_EL0[31:0].
External register AMEVTYPER0<n> bits [31:0] are architecturally mapped to AArch32 System register AMEVTYPER0<n>[31:0].
The power domain of AMEVTYPER0<n> is IMPLEMENTATION DEFINED.
This register is present only when FEAT_AMUv1 is implemented. Otherwise, direct accesses to AMEVTYPER0<n> are RES0.
AMEVTYPER0<n> is a 32-bit register.
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 | evtCount |
Reserved, RAZ.
Reserved, RES0.
Event to count. The event number of the event that is counted by the architected activity monitor event counter AMEVCNTR0<n>. The value of this field is architecturally mandated for each architected counter.
The following table shows the mapping between required event numbers and the corresponding counters:
evtCount | Meaning | Applies when |
---|---|---|
0x0011 | Processor frequency cycles | When n == 0 |
0x4004 | Constant frequency cycles | When n == 1 |
0x0008 | Instructions retired | When n == 2 |
0x4005 | Memory stall cycles | When n == 3 |
If <n> is greater than or equal to the number of architected activity monitor event counters, reads of AMEVTYPER0<n> are RAZ.RAZ/WI. Software must treat reserved accesses as RES0. See 'Access requirements for reserved and unallocated registers'.
AMCGCR.CG0NC identifies the number of architected activity monitor event counters.
Component | Offset | Instance |
---|---|---|
AMU | 0x400 + (4 * n) | AMEVTYPER0<n> |
Accesses on this interface are RO.
30/06/2021 1509:2239; 2a17f7750cfd1ab239f20f6cf29877ba8041794f4f5dd962f4e34e1ac282f76da4d6e7fc4cab087e
Copyright © 2010-2021 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.
(old) | htmldiff from- | (new) |