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:
When FEAT_Debugv8p4 is implemented:
Secure non-invasive debug.
This field has the same value as DBGAUTHSTATUS_EL1.SID.
Otherwise:
Otherwise:
Secure non-invasive debug.
SNID | Meaning |
---|---|
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.
SID | Meaning |
---|---|
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 FEAT_Debugv8p4 is implemented:
When FEAT_Debugv8p4 is implemented:
Non-secure non-invasive debug.
NSNID | Meaning |
---|---|
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:
Otherwise:
Non-secure non-invasive debug.
NSNID | Meaning |
---|---|
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.
NSID | Meaning |
---|---|
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:
Component | Offset | Instance |
---|---|---|
Debug | 0xFB8 | DBGAUTHSTATUS_EL1 |
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.