3.2.12. Security Inversion Enable Register

The security_inversion_en Register characteristics are:

Purpose

Controls whether the TZASC enables security inversion to occur.

Usage constraints

The lockdown_select Register can restrict the access type of this register to RO. See Lockdown Select Register.

Configurations

Available in all configurations of the TZASC.

Attributes

See the register summary in Table 3.1.

Figure 3.12 shows the security_inversion_en Register bit assignments.

Figure 3.12. security_inversion_en Register bit assignments


Table 3.12 shows the security_inversion_en Register bit assignments.

Table 3.12. security_inversion_en Register bit assignments

BitsNameFunction
[31:1]-Reserved, SBZ.
[0]security_inversion_en

Controls whether the TZASC permits security inversion to occur:

0 = security inversion is not permitted. This is the default.

1 = security inversion is permitted. This enables a region to be accessible to masters in Non-secure state but not accessible to masters in Secure state.


See Security inversion for more information.

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