You copied the Doc URL to your clipboard.

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] .

It is IMPLEMENTATION DEFINED whether DBGAUTHSTATUS_EL1 is implemented in the Core power domain or in the Debug power domain.

If ARMv8.3-DoPD is implemented, this register is in the Core power domain. If ARMv8.3-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:

313029282726252423222120191817161514131211109876543210
RES0SNIDSIDNSNIDNSID

Bits [31:8]

Reserved, RES0.

SNID, bits [7:6]

When ARMv8.4-Debug is implemented:

Secure non-invasive debug.

ExternalSecureNoninvasiveDebugEnabled() == ExternalSecureInvasiveDebugEnabled().

This field has the same value as DBGAUTHSTATUS_EL1.SID.


Otherwise:

Secure non-invasive debug.

SNIDMeaning
0b00

Not implemented. EL3 is not implemented and the Effective value of SCR_EL3.NS is 1.

0b10

Implemented and disabled. ExternalSecureNoninvasiveDebugEnabled() == FALSE.

0b11

Implemented and enabled. ExternalSecureNoninvasiveDebugEnabled() == TRUE.

All other values are reserved.

SID, bits [5:4]

Secure invasive debug.

SIDMeaning
0b00

Not implemented. EL3 is not implemented and the Effective value of SCR_EL3.NS is 1.

0b10

Implemented and disabled. ExternalSecureInvasiveDebugEnabled() == FALSE.

0b11

Implemented and enabled. ExternalSecureInvasiveDebugEnabled() == TRUE.

All other values are reserved.

NSNID, bits [3:2]

When ARMv8.4-Debug is implemented:

Non-secure non-invasive debug.

NSNIDMeaning
0b00

Not implemented. EL3 is not implemented and the Effective value of SCR_EL3.NS is 0.

0b11

Implemented and enabled. ExternalNoninvasiveDebugEnabled() == TRUE.

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.

NSNIDMeaning
0b00

Not implemented. EL3 is not implemented and the Effective value of SCR_EL3.NS is 0.

0b10

Implemented and disabled. ExternalNoninvasiveDebugEnabled() == FALSE.

0b11

Implemented and enabled. ExternalNoninvasiveDebugEnabled() == TRUE.

All other values are reserved.

NSID, bits [1:0]

Non-secure invasive debug.

NSIDMeaning
0b00

Not implemented. EL3 is not implemented and the Effective value of SCR_EL3.NS is 0.

0b10

Implemented and disabled. ExternalInvasiveDebugEnabled() == FALSE.

0b11

Implemented and enabled. ExternalInvasiveDebugEnabled() == TRUE.

All other values are reserved.

Accessing the DBGAUTHSTATUS_EL1

DBGAUTHSTATUS_EL1 can be accessed through the external debug interface:

ComponentOffsetInstance
Debug0xFB8DBGAUTHSTATUS_EL1

This interface is accessible as follows:

  • When ARMv8.3-DoPD is not implemented or IsCorePowered() access to this register is RO.
  • Otherwise access to this register returns an Error.


Was this page helpful? Yes No