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

AArch64 System register DBGAUTHSTATUS_EL1 bits [31:0] are architecturally mapped to AArch32 System register DBGAUTHSTATUS[31:0] .

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

Attributes

DBGAUTHSTATUS_EL1 is a 64-bit register.

Field descriptions

The DBGAUTHSTATUS_EL1 bit assignments are:

6362616059585756555453525150494847464544434241403938373635343332
RES0
RES0SNIDSIDNSNIDNSID
313029282726252423222120191817161514131211109876543210

Bits [63:8]

Reserved, RES0.

SNID, bits [7:6]

When ARMv8.4-Debug is implemented:

Secure non-invasive debug.

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. EL3 is implemented or the Effective value of SCR_EL3.NS is 1.

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

Accesses to this register use the following encodings:

MRS <Xt>, DBGAUTHSTATUS_EL1

op0op1CRnCRmop2
0b100b0000b01110b11100b110
if PSTATE.EL == EL0 then
    UNDEFINED;
elsif PSTATE.EL == EL1 then
    if EL2Enabled() && !ELUsingAArch32(EL2) && (!HaveEL(EL3) || SCR_EL3.FGTEn == '1') && HDFGRTR_EL2.DBGAUTHSTATUS_EL1 == '1' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif EL2Enabled() && !ELUsingAArch32(EL2) && MDCR_EL2.<TDE,TDA> != '00' then
        AArch64.SystemAccessTrap(EL2, 0x18);
    elsif HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        return DBGAUTHSTATUS_EL1;
elsif PSTATE.EL == EL2 then
    if HaveEL(EL3) && !ELUsingAArch32(EL3) && MDCR_EL3.TDA == '1' then
        AArch64.SystemAccessTrap(EL3, 0x18);
    else
        return DBGAUTHSTATUS_EL1;
elsif PSTATE.EL == EL3 then
    return DBGAUTHSTATUS_EL1;
              


Was this page helpful? Yes No