2.2.5 Redistributor miscellaneous input signals

The Redistributor receives signals that identify the status of each core. It also has a tie-off signal that provides the Redistributor with a unique identifier.

Table 2-8 Redistributor miscellaneous input signals

Signal Direction Description
cpu_active Input This signal indicates if the core is active and not in a low-power state such as retention. The GIC can decide to target only active cores for 1 of N SPIs. See 3.15 Performance Monitoring Unit.

Note:

cpu_active is not synchronized into the Redistributor. If cpu_active is driven from a different domain, it must be synchronized externally.
ppi_id[15:0] Input This tie-off signal provides the Redistributor with a unique identifier that is used primarily to ensure that the GIC is correctly integrated into the system.
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