A11.4 ACP user signals

ACP transactions can cause coherent requests to the system. Therefore ACP requests must pass Inner and Outer Shareable attributes to the L2. Use specific encoding to pass the shareability attribute.

Table A11-1 Encoding of the ACP shareability attribute

AxUSER[1:0] Attribute
0b00 Non-shareable
0b01 Inner Shareable
0b10 Outer Shareable

This is the same encoding as AxDOMAIN on ACE, except that a value of 0b11 is not supported.

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