TS-7840 PCIe
From embeddedTS Manuals
The Marvell Armada 385 supports two PCIe 2.0 channels with 1 lane each. On the TS-7840 the onboard FPGA provides all of its peripherals over one of the PCIe lanes. See the #FPGA section for more details on the FPGA's PCIe access.
The other PCIe bus is a x1 lane which is accessible on the #Mini PCIe header.