DBGAUTHSTATUS_EL1, Debug Authentication Status register

The DBGAUTHSTATUS_EL1 characteristics are:

Purpose

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

Configuration

External register DBGAUTHSTATUS_EL1 bits [31:0] are architecturally mapped to AArch64 System register DBGAUTHSTATUS_EL1[31:0] .

External register DBGAUTHSTATUS_EL1 bits [31:0] are architecturally mapped to AArch32 System register DBGAUTHSTATUS[31:0] .

If FEAT_DoPD is implemented, this register is in the Core power domain. If FEAT_DoPD is not implemented, this register is in the Debug power domain.

Attributes

DBGAUTHSTATUS_EL1 is a 32-bit register.

Field descriptions

The DBGAUTHSTATUS_EL1 bit assignments are:

Bits [31:8]

Reserved, RES0.

SNID, bits [7:6]

When FEAT_Debugv8p4 is implemented:

Secure non-invasive debug.

This field has the same value as DBGAUTHSTATUS_EL1.SID.

Otherwise:

Secure non-invasive debug.

All other values are reserved.

SID, bits [5:4]

Secure invasive debug.

All other values are reserved.

NSNID, bits [3:2]

When FEAT_Debugv8p4 is implemented:

Non-secure non-invasive debug.

If the Effective value of SCR_EL3.NS is 1, or if EL3 is implemented and EL2 is not implemented, this field reads as 0b11.

All other values are reserved.

Otherwise:

Non-secure non-invasive debug.

All other values are reserved.

NSID, bits [1:0]

Non-secure invasive debug.

All other values are reserved.

Accessing the DBGAUTHSTATUS_EL1

DBGAUTHSTATUS_EL1 can be accessed through the external debug interface:

This interface is accessible as follows:

• When FEAT_DoPD is not implemented or IsCorePowered() accesses to this register are RO.
• Otherwise accesses to this register generate an error response.