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Arm CoreLink GIC-600 Generic Interrupt Controller Technical Reference Manual : CPU interface signals

CPU interface signals

The following table shows the GIC-600 CPU interface signal set.

Table A-4 CPU interface signals

Signal name Type Source or destination Description
icctready[_<ppi_num>][_<bus>] Output Core block

GIC Stream-compliant bus for communication from the core block to the Redistributor. It is fully credited and can be sent over any free-flowing interconnect.

See the Redistributor to downstream CPU interface table in the GIC Stream Redistributor to downstream CPU interface Appendix of the Arm® Generic Interrupt Controller Architecture Specification, GIC architecture version 3.0 and version 4.0.

IDs icctid values of <num_cpus − 1:0> are used. Issuing other values is unpredictable.

icctvalid[_<ppi_num>][_<bus>] Input
icctdata[_<ppi_num>][_<bus>][15:0] Input
icctid[_<ppi_num>][_<bus>] [variable:0]a Input
icctlast[_<ppi_num>][_<bus>] Input
iccttwakeup[_<ppi_num>][_<bus>] Input Registered wake signal to indicate that a message is arriving or is about to arrive on the icc bus. Signals icctvalid and icctready control data transfer.
iritready[_<ppi_num>][_<bus>] Input Core block

GIC Stream-compliant bus for communication from the Redistributor to the core block. It is fully credited and can be sent over any free-flowing interconnect.

See the Redistributor to downstream CPU interface table in the GIC Stream Redistributor to downstream CPU interface Appendix of the Arm® Generic Interrupt Controller Architecture Specification, GIC architecture version 3.0 and version 4.0.

IDs iritdest values of <num_cpus − 1:0> are used.

iritvalid[_<ppi_num>][_<bus>] Output
iritdata[_<ppi_num>][_<bus>][15:0] Output
iritdest [_<ppi_num>][_<bus>][variable:0]a Output
iritlast[_<ppi_num>][_<bus>] Output
iritwakeup[_<ppi_num>][_<bus>] Output Registered wake signal to indicate that a message is arriving or is about to arrive on the iri bus. Signals iritvalid and iritready control data transfer.
a The variable is configuration-dependent.
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