ARM Cortex-A57 MPCore Processor Technical Reference ManualRevision: r1p1
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A.9.2. Transmit request virtual channel signals

Table A.10 shows the transmit request virtual channel signals for the CHI interface.

Table A.10. Transmit request virtual channel signals

SignalTypeDescription
TXREQFLITPENDOutputTransmit request flit pending.
TXREQFLITVOutput

Transmit request flit valid.

TXREQFLIT[99:0]OutputTransmit request flit payload.[a]
TXREQLCRDVInput

Transmit request link-layer credit valid.

REQMEMATTR[7:0]Output

Transmit request raw memory attributes:

[7]

Outer Shareable.

[6:3]

Outer memory attribute in MAIR format.

[2]

Inner Shareable.

[1:0]
0b00

Device.

0b01

Normal Non-cacheable.

0b10

Normal Write-Through.

0b11

Normal Write-Back.

[a] TXREQFLIT[MemAttr] allocation hints based on outer memory attributes from MMU.


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