ARM R4 Manuale Utente
Debug
ARM DDI 0363E
Copyright © 2009 ARM Limited. All rights reserved.
11-29
ID013010
Non-Confidential, Unrestricted Access
Figure 11-12 OS Lock Status Register format
Table 11-21 shows how the bit values correspond with the OS Lock Status Register functions.
11.4.17 Authentication Status Register
The Authentication Status Register is a read-only register that reads the current values of the
configuration inputs that determine the debug permission level.
configuration inputs that determine the debug permission level.
Figure 11-13 shows the bit arrangement of the Authentication Status Register.
Figure 11-13 Authentication Status Register format
Table 11-22 shows how the bit values correspond with the Authentication Status Register
functions.
functions.
31
0
Reserved
1
Lock implemented bit
Table 11-21 OS Lock Status Register functions
Bits
Field
Function
[31:1]
Reserved
RAZ.
[0]
Lock implemented bit
Indicates that the OS lock functionality is not implemented. This bit always reads 0.
31
0
3
Reserved
4
5
6
7
8
Secure non-invasive debug features implemented
Secure non-invasive debug features enabled
Secure invasive debug features implemented
Secure invasive debug features enabled
Non-secure debug features
Table 11-22 Authentication Status Register bit functions
Bits
Field
Value
Function
[31:8]
Reserved
-
RAZ
[7]
Secure non-invasive debug
features implemented
features implemented
0b1
Implemented
[6]
Secure non-invasive debug
features enabled
features enabled
DBGEN || NIDEN
Non-invasive debug enable field
[5]
Secure invasive debug
features implemented
features implemented
0b1
Implemented
[4]
Secure invasive debug
features enabled
features enabled
DBGEN
Invasive debug enable field
[3:0]
Non-secure debug features
a
0x0
Not implemented