TRCAUTHSTATUS, Authentication Status Register

The TRCAUTHSTATUS characteristics are:

Purpose

Provides information about the state of the IMPLEMENTATION DEFINED authentication interface for debug.

For additional information, see the CoreSight Architecture Specification.

Configuration

External register TRCAUTHSTATUS bits [31:0] are architecturally mapped to AArch64 System register TRCAUTHSTATUS[31:0].

This register is present only when FEAT_ETE is implemented and FEAT_TRC_EXT is implemented. Otherwise, direct accesses to TRCAUTHSTATUS are RES0.

Attributes

TRCAUTHSTATUS is a 32-bit register.

Field descriptions

Bits [31:28]

RTNID, bits [27:26]

RTID, bits [25:24]

Bits [23:16]

RLNID, bits [15:14]

RLID, bits [13:12]

HNID, bits [11:10]

HID, bits [9:8]

SNID, bits [7:6]

SID, bits [5:4]

NSNID, bits [3:2]

NSID, bits [1:0]

Accessing TRCAUTHSTATUS

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.

External debugger accesses to this register are unaffected by the OS Lock.

TRCAUTHSTATUS can be accessed through the external debug interface:

This interface is accessible as follows:

• When !IsTraceCorePowered(), accesses to this register generate an error response.
• Otherwise, accesses to this register are RO.

04/07/2023 11:27; 1b994cb0b8c6d1ae5a9a15edbc8bd6ce3b5c7d68

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