3.2.2. Action Register

The action Register characteristics are:

Purpose

Controls the response signaling behavior of the TZASC to region permission failures.

Usage constraints

There are no usage constraints.

Configurations

Available in all configurations of the TZASC.

Attributes

See the register summary in Table 3.1.

Figure 3.3 shows the action Register bit assignments.

Figure 3.3. action Register bit assignments


Table 3.3 shows the action Register bit assignments.

Table 3.3. action Register bit assignments

BitsNameFunction
[31:2]-Reserved, SBZ
[1:0]reaction_value

Controls how the TZASC uses the bresps[1:0], rresps[1:0], and tzasc_int signals when a region permission failure occurs:

b00 = sets tzasc_int LOW and issues an OKAY response

b01 = sets tzasc_int LOW and issues a DECERR response

b10 = sets tzasc_int HIGH and issues an OKAY response

b11 = sets tzasc_int HIGH and issues a DECERR response.


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