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The TRBMPAM characteristics are:
Defines the PARTID, PMG, and MPAM_SP values used by the trace buffer unit.
This register is present only when FEAT_TRBE_EXT is implemented. Otherwise, direct accesses to TRBMPAM are RES0.
TRBMPAM is a 64-bit register.
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 | |||||||||||||||||||||||||||||||
RES0 | EN | MPAM_SP | PMG | PARTID |
Reserved, RES0.
Enable. Enables use of non-default MPAM values.
EN | Meaning |
---|---|
0b0 | Use default MPAM values. |
0b1 | Use TRBMPAM.{PARTID, PMG, MPAM_SP}. |
This field is ignored by the PE when SelfHostedTraceEnabled() == TRUE.
The reset behavior of this field is:
Partition Identifier space. Selects the PARTID space.
MPAM_SP | Meaning | Applies when |
---|---|---|
0b00 | PARTID is in the Secure PARTID space. | |
0b01 | PARTID is in the Non-secure PARTID space. | |
0b10 | PARTID is in the Root PARTID space. | When FEAT_RME is implemented |
0b11 | PARTID is in the Realm PARTID space. | When FEAT_RME is implemented |
All other values are reserved.
If SecureNoninvasiveDebugEnabled() == FALSE, the value 0b00 is treated as 0b01.
If FEAT_RME is implemented and RootNoninvasiveDebugEnabled() == FALSE, the value 0b10 is treated as 0b01.
If FEAT_RME is implemented and RealmNoninvasiveDebugEnabled() == FALSE, the value 0b11 is treated as 0b01.
This field is ignored by the PE when SelfHostedTraceEnabled() == TRUE.
The reset behavior of this field is:
Performance Monitoring Group. Selects the PMG.
Only sufficient low-order bits are required to represent the TRBDEVID1.PMG_MAX. Higher-order bits are RES0.
This field is ignored by the PE when SelfHostedTraceEnabled() == TRUE.
The reset behavior of this field is:
Partition Identifier. Selects the PARTID.
Only sufficient low-order bits are required to represent the TRBDEVID1.PARTID_MAX. Higher-order bits are RES0.
This field is ignored by the PE when SelfHostedTraceEnabled() == TRUE.
The reset behavior of this field is:
Component | Offset | Instance |
---|---|---|
TRBE | 0x040 | TRBMPAM |
Accesses to this interface are RW.
30/09/2022 15:58; 21c5a6dd0fdaf10a712e2f2d6fffbdbd66d4d96f
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