1Glossary 2======== 3 4This glossary provides definitions for terms and abbreviations used in the TF-A 5documentation. 6 7You can find additional definitions in the `Arm Glossary`_. 8 9.. glossary:: 10 :sorted: 11 12 AArch32 13 32-bit execution state of the ARMv8 ISA 14 15 AArch64 16 64-bit execution state of the ARMv8 ISA 17 18 AMU 19 Activity Monitor Unit, a hardware monitoring unit introduced by FEAT_AMUv1 20 that exposes CPU core runtime metrics as a set of counter registers. 21 22 API 23 Application Programming Interface 24 25 AT 26 Address Translation 27 28 BTI 29 Branch Target Identification. An Armv8.5 extension providing additional 30 control flow integrity around indirect branches and their targets. 31 32 CoT 33 COT 34 Chain of Trust 35 36 CSS 37 Compute Sub-System 38 39 CVE 40 Common Vulnerabilities and Exposures. A CVE document is commonly used to 41 describe a publicly-known security vulnerability. 42 43 DCE 44 DRTM Configuration Environment 45 46 D-CRTM 47 Dynamic Code Root of Trust for Measurement 48 49 DLME 50 Dynamically Launched Measured Environment 51 52 DRTM 53 Dynamic Root of Trust for Measurement 54 55 DS-5 56 Arm Development Studio 5 57 58 DSU 59 DynamIQ Shared Unit 60 61 DT 62 Device Tree 63 64 DTB 65 Device Tree Blob 66 67 EL 68 Exception Level 69 70 EHF 71 Exception Handling Framework 72 73 FCONF 74 Firmware Configuration Framework 75 76 FDT 77 Flattened Device Tree 78 79 FF-A 80 Firmware Framework for Arm A-profile 81 82 FIP 83 Firmware Image Package 84 85 FVP 86 Fixed Virtual Platform 87 88 FWU 89 FirmWare Update 90 91 GIC 92 Generic Interrupt Controller 93 94 ISA 95 Instruction Set Architecture 96 97 Linaro 98 A collaborative engineering organization consolidating 99 and optimizing open source software and tools for the Arm architecture. 100 101 LSP 102 A logical secure partition managed by SPM 103 104 MMU 105 Memory Management Unit 106 107 MPAM 108 Memory Partitioning And Monitoring. An optional Armv8.4 extension. 109 110 MPMM 111 Maximum Power Mitigation Mechanism, an optional power management mechanism 112 supported by some Arm Armv9-A cores. 113 114 MPIDR 115 Multiprocessor Affinity Register 116 117 MTE 118 Memory Tagging Extension. An optional Armv8.5 extension that enables 119 hardware-assisted memory tagging. 120 121 OEN 122 Owning Entity Number 123 124 OP-TEE 125 Open Portable Trusted Execution Environment. An example of a :term:`TEE` 126 127 OTE 128 Open-source Trusted Execution Environment 129 130 PDD 131 Platform Design Document 132 133 PAUTH 134 Pointer Authentication. An optional extension introduced in Armv8.3. 135 136 PMF 137 Performance Measurement Framework 138 139 PSA 140 Platform Security Architecture 141 142 PSCI 143 Power State Coordination Interface 144 145 RAS 146 Reliability, Availability, and Serviceability extensions. A mandatory 147 extension for the Armv8.2 architecture and later. An optional extension to 148 the base Armv8 architecture. 149 150 ROT 151 Root of Trust 152 153 SCMI 154 System Control and Management Interface 155 156 SCP 157 System Control Processor 158 159 SDEI 160 Software Delegated Exception Interface 161 162 SDS 163 Shared Data Storage 164 165 SEA 166 Synchronous External Abort 167 168 SiP 169 SIP 170 Silicon Provider 171 172 SMC 173 Secure Monitor Call 174 175 SMCCC 176 :term:`SMC` Calling Convention 177 178 SoC 179 System on Chip 180 181 SP 182 Secure Partition 183 184 SPD 185 Secure Payload Dispatcher 186 187 SPM 188 Secure Partition Manager 189 190 SRTM 191 Static Root of Trust for Measurement 192 193 SSBS 194 Speculative Store Bypass Safe. Introduced in Armv8.5, this configuration 195 bit can be set by software to allow or prevent the hardware from 196 performing speculative operations. 197 198 SVE 199 Scalable Vector Extension 200 201 TBB 202 Trusted Board Boot 203 204 TBBR 205 Trusted Board Boot Requirements 206 207 TCB 208 Trusted Compute Base 209 210 TCG 211 Trusted Computing Group 212 213 TEE 214 Trusted Execution Environment 215 216 TF-A 217 Trusted Firmware-A 218 219 TF-M 220 Trusted Firmware-M 221 222 TLB 223 Translation Lookaside Buffer 224 225 TLK 226 Trusted Little Kernel. A Trusted OS from NVIDIA. 227 228 TPM 229 Trusted Platform Module 230 231 TRNG 232 True Random Number Generator (hardware based) 233 234 TSP 235 Test Secure Payload 236 237 TZC 238 TrustZone Controller 239 240 UBSAN 241 Undefined Behavior Sanitizer 242 243 UEFI 244 Unified Extensible Firmware Interface 245 246 WDOG 247 Watchdog 248 249 XLAT 250 Translation (abbr.). For example, "XLAT table". 251 252.. _`Arm Glossary`: https://developer.arm.com/support/arm-glossary 253