TRCAUTHSTATUS Trace Authentication Status Register when FEAT_ETE is implemented and System register access to the trace unit registers is implemented TRCAUTHSTATUS Architectural External 31 0 31 0 31 0 31 0 Provides information about the state of the IMPLEMENTATION DEFINED authentication interface for debug. For additional information, see the CoreSight Architecture Specification. Trace Management TRCAUTHSTATUS is a 64-bit register. 63 28 63:28 Reserved, RES0. RTNID 27 26 27:26 Root non-invasive debug. This field has the same value as DBGAUTHSTATUS_EL1.RTNID. RTID 25 24 25:24 Root invasive debug. 0b00 Not implemented. 23 16 23:16 Reserved, RES0. RLNID 15 14 15:14 Realm non-invasive debug. This field has the same value as DBGAUTHSTATUS_EL1.RLNID. RLID 13 12 13:12 Realm invasive debug. 0b00 Not implemented. HNID 11 10 11:10 Hyp Non-invasive Debug. Indicates whether a separate enable control for EL2 non-invasive debug features is implemented and enabled. All other values are reserved. This field reads as 0b00. 0b00 Separate Hyp non-invasive debug enable not implemented, or EL2 non-invasive debug features not implemented. 0b10 Implemented and disabled. 0b11 Implemented and enabled. HID 9 8 9:8 Hyp Invasive Debug. Indicates whether a separate enable control for EL2 invasive debug features is implemented and enabled. All other values are reserved. This field reads as 0b00. 0b00 Separate Hyp invasive debug enable not implemented, or EL2 invasive debug features not implemented. 0b10 Implemented and disabled. 0b11 Implemented and enabled. SNID 7 6 7:6 Secure Non-invasive Debug. Indicates whether Secure non-invasive debug features are implemented and enabled. All other values are reserved. When Secure state is implemented, this field reads as 0b10 or 0b11 depending whether Secure non-invasive debug is enabled. When Secure state is not implemented, this field reads as 0b00. 0b00 Secure non-invasive debug features not implemented. 0b10 Implemented and disabled. 0b11 Implemented and enabled. SID 5 4 5:4 Secure Invasive Debug. Indicates whether Secure invasive debug features are implemented and enabled. All other values are reserved. This field reads as 0b00. 0b00 Secure invasive debug features not implemented. 0b10 Implemented and disabled. 0b11 Implemented and enabled. NSNID 3 2 3:2 Non-secure Non-invasive Debug. Indicates whether Non-secure non-invasive debug features are implemented and enabled. All other values are reserved. When Non-secure state is implemented, this field reads as 0b11. When Non-secure state is not implemented, this field reads as 0b00. 0b00 Non-secure non-invasive debug features not implemented. 0b10 Implemented and disabled. 0b11 Implemented and enabled. NSID 1 0 1:0 Non-secure Invasive Debug. Indicates whether Non-secure invasive debug features are implemented and enabled. All other values are reserved. This field reads as 0b00. 0b00 Non-secure invasive debug features not implemented. 0b10 Implemented and disabled. 0b11 Implemented and enabled. For implementations that support multiple access mechanisms, different access mechanisms can return different values for reads of TRCAUTHSTATUS if the authentication signals have changed and that change has not yet been synchronized by a Context synchronization event. This scenario can happen if, for example, the external debugger view is implemented separately from the system instruction view to allow for separate power domains, and so observes changes on the signals differently. MRS <Xt>, TRCAUTHSTATUS if !(IsFeatureImplemented(FEAT_ETE) && IsFeatureImplemented(FEAT_TRC_SR)) then Undefined(); elsif PSTATE.EL == EL0 then Undefined(); elsif PSTATE.EL == EL1 then if HaveEL(EL3) && EL3SDDUndefPriority() && CPTR_EL3().TTA == '1' then Undefined(); elsif CPACR_EL1().TTA == '1' then AArch64_SystemAccessTrap(EL1, 0x18); elsif EL2Enabled() && CPTR_EL2().TTA == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif EL2Enabled() && IsFeatureImplemented(FEAT_FGT) && (!HaveEL(EL3) || SCR_EL3().FGTEn == '1') && HDFGRTR_EL2().TRCAUTHSTATUS == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3().TTA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else X{64}(t) = TRCAUTHSTATUS(); end; elsif PSTATE.EL == EL2 then if HaveEL(EL3) && EL3SDDUndefPriority() && CPTR_EL3().TTA == '1' then Undefined(); elsif CPTR_EL2().TTA == '1' then AArch64_SystemAccessTrap(EL2, 0x18); elsif HaveEL(EL3) && CPTR_EL3().TTA == '1' then if EL3SDDUndef() then Undefined(); else AArch64_SystemAccessTrap(EL3, 0x18); end; elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else X{64}(t) = TRCAUTHSTATUS(); end; elsif PSTATE.EL == EL3 then if CPTR_EL3().TTA == '1' then AArch64_SystemAccessTrap(EL3, 0x18); elsif IsFeatureImplemented(FEAT_TRBE_EXT) && OSLSR_EL1().OSLK == '0' && HaltingAllowed() && EDSCR2().TTA == '1' then Halt(DebugHalt_SoftwareAccess); else X{64}(t) = TRCAUTHSTATUS(); end; end; 2026-03-26 20:27:25 2026-03_rel