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Glossary
========
This glossary provides definitions for terms and abbreviations used in the TF-A
documentation.
You can find additional definitions in the `Arm Glossary`_.
.. glossary::
:sorted:
AArch32
32-bit execution state of the ARMv8 ISA
AArch64
64-bit execution state of the ARMv8 ISA
AMU
Activity Monitor Unit, a hardware monitoring unit introduced by FEAT_AMUv1
that exposes CPU core runtime metrics as a set of counter registers.
API
Application Programming Interface
AT
Address Translation
BTI
Branch Target Identification. An Armv8.5 extension providing additional
control flow integrity around indirect branches and their targets.
CoT
COT
Chain of Trust
CSS
Compute Sub-System
CVE
Common Vulnerabilities and Exposures. A CVE document is commonly used to
describe a publicly-known security vulnerability.
DCE
DRTM Configuration Environment
D-CRTM
Dynamic Code Root of Trust for Measurement
DLME
Dynamically Launched Measured Environment
DRTM
Dynamic Root of Trust for Measurement
DS-5
Arm Development Studio 5
DSU
DynamIQ Shared Unit
DT
Device Tree
DTB
Device Tree Blob
EL
Exception Level
EHF
Exception Handling Framework
FCONF
Firmware Configuration Framework
FDT
Flattened Device Tree
FF-A
Firmware Framework for Arm A-profile
FIP
Firmware Image Package
FVP
Fixed Virtual Platform
FWU
FirmWare Update
GIC
Generic Interrupt Controller
ISA
Instruction Set Architecture
Linaro
A collaborative engineering organization consolidating
and optimizing open source software and tools for the Arm architecture.
LSP
A logical secure partition managed by SPM
MMU
Memory Management Unit
MPAM
Memory Partitioning And Monitoring. An optional Armv8.4 extension.
MPMM
Maximum Power Mitigation Mechanism, an optional power management mechanism
supported by some Arm Armv9-A cores.
MPIDR
Multiprocessor Affinity Register
MTE
Memory Tagging Extension. An optional Armv8.5 extension that enables
hardware-assisted memory tagging.
OEN
Owning Entity Number
OP-TEE
Open Portable Trusted Execution Environment. An example of a :term:`TEE`
OTE
Open-source Trusted Execution Environment
PDD
Platform Design Document
PAUTH
Pointer Authentication. An optional extension introduced in Armv8.3.
PMF
Performance Measurement Framework
PSA
Platform Security Architecture
PSCI
Power State Coordination Interface
RAS
Reliability, Availability, and Serviceability extensions. A mandatory
extension for the Armv8.2 architecture and later. An optional extension to
the base Armv8 architecture.
ROT
Root of Trust
SCMI
System Control and Management Interface
SCP
System Control Processor
SDEI
Software Delegated Exception Interface
SDS
Shared Data Storage
SEA
Synchronous External Abort
SiP
SIP
Silicon Provider
SMC
Secure Monitor Call
SMCCC
:term:`SMC` Calling Convention
SoC
System on Chip
SP
Secure Partition
SPD
Secure Payload Dispatcher
SPM
Secure Partition Manager
SSBS
Speculative Store Bypass Safe. Introduced in Armv8.5, this configuration
bit can be set by software to allow or prevent the hardware from
performing speculative operations.
SVE
Scalable Vector Extension
TBB
Trusted Board Boot
TBBR
Trusted Board Boot Requirements
TCB
Trusted Compute Base
TEE
Trusted Execution Environment
TF-A
Trusted Firmware-A
TF-M
Trusted Firmware-M
TLB
Translation Lookaside Buffer
TLK
Trusted Little Kernel. A Trusted OS from NVIDIA.
TRNG
True Randon Number Generator (hardware based)
TSP
Test Secure Payload
TZC
TrustZone Controller
UBSAN
Undefined Behavior Sanitizer
UEFI
Unified Extensible Firmware Interface
WDOG
Watchdog
XLAT
Translation (abbr.). For example, "XLAT table".
.. _`Arm Glossary`: https://developer.arm.com/support/arm-glossary
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