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.

This register is part of the Debug registers functional group.

Configuration

AArch64 System register DBGAUTHSTATUS_EL1 is architecturally mapped to AArch32 System register DBGAUTHSTATUS.

AArch64 System register DBGAUTHSTATUS_EL1 is architecturally mapped to External register DBGAUTHSTATUS_EL1.

Attributes

DBGAUTHSTATUS_EL1 is a 32-bit register.

Field descriptions

The DBGAUTHSTATUS_EL1 bit assignments are:

313029282726252423222120191817161514131211109876543210
000000000000000000000000SNIDSIDNSNIDNSID

Bits [31:8]

Reserved, RES0.

SNID, bits [7:6]

Secure non-invasive debug. Possible values of this field are:

SNIDMeaning
00

Not implemented. EL3 is not implemented and the implemented Security state is Non-secure state.

10

Implemented and disabled. ExternalSecureNoninvasiveDebugEnabled() == FALSE.

11

Implemented and enabled. ExternalSecureNoninvasiveDebugEnabled() == TRUE.

Other values are reserved.

SID, bits [5:4]

Secure invasive debug. Possible values of this field are:

SIDMeaning
00

Not implemented. EL3 is not implemented and the implemented Security state is Non-secure state.

10

Implemented and disabled. ExternalSecureInvasiveDebugEnabled() == FALSE.

11

Implemented and enabled. ExternalSecureInvasiveDebugEnabled() == TRUE.

Other values are reserved.

NSNID, bits [3:2]

Non-secure non-invasive debug. Possible values of this field are:

NSNIDMeaning
00

Not implemented. EL3 is not implemented and the implemented Security state is Secure state.

10

Implemented and disabled. ExternalNoninvasiveDebugEnabled() == FALSE.

11

Implemented and enabled. ExternalNoninvasiveDebugEnabled() == TRUE.

Other values are reserved.

NSID, bits [1:0]

Non-secure invasive debug. Possible values of this field are:

NSIDMeaning
00

Not implemented. EL3 is not implemented and the implemented Security state is Secure state.

10

Implemented and disabled. ExternalInvasiveDebugEnabled() == FALSE.

11

Implemented and enabled. ExternalInvasiveDebugEnabled() == TRUE.

Other values are reserved.

Accessing the DBGAUTHSTATUS_EL1

This register can be read using MRS with the following syntax:

MRS <Xt>, <systemreg>

This syntax uses the following encoding in the System instruction encoding space:

<systemreg> op0op1CRnCRmop2
DBGAUTHSTATUS_EL11000001111110110

Accessibility

The register is accessible as follows:

Control Accessibility
E2HTGENSEL0EL1EL2EL3
xx0 - RO n/a RO
x01 - RORORO
x11 - n/a RORO

This table applies to all instructions that can access this register.

Traps and enables

For a description of the prioritization of any generated exceptions, see section D1.13.2 (Synchronous exception prioritization) in the ARM® Architecture Reference Manual, ARMv8, for ARMv8-A architecture profile. Subject to the prioritization rules, the following traps and enables are applicable when accessing this register.

When EL2 is implemented and is using AArch64 and SCR_EL3.NS==1 :

When EL3 is implemented and is using AArch64 :




18/04/2017 17:00

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