Artesyn COMX-P4080 Installation and Use (August 2014) - Manual (Page 108)

BSP Operations
COMX-P4080 COM Express Module Installation and Use (6806800L20C) 108
To allow the board to function through those limitations, the COMX-P4080 powers down two
SGMII ports when the XAUI is enabled through the SerDes/RCW options.
COMX-P4080 has the following combinations of network ports in the frame managers:
 1 RGMII (FM1) + 2 SGMII (FM2) + XAUI (FM2)
 1 RGMII (FM1) + 4 SGMII (FM2)
PCIE-based network ports like the Intel PRO/1000 are not limited by the abovementioned rules
because their packets are handled not by the the frame managers but by the CPU. COMX-
P4080 powers down the Bank 3 SerDes (FM1 lanes).
EC1 of pin multiplexing configuration in the RCW routes the RGMII port (FM1@DTSEC1) to the
EC1 parallel mode pins. The RGMII port is always present in all of the twelve SerDes/RCW
options.
With 1 SGMII-Riser (Freescale), 1 XAUI-Rise (Freescale), 2 PRO/1000 Server Adapter (Intel), the
valid combinations of network ports among the twelve SerDes/RCW options are listed in
Table
"Valid Network Ports Combination of SerDes/RCW" on page 109 .
Table 7-9 Network Ports Naming Rules in U-Boot
FM1 Network Ports
Port 0 (the RGMII port) is named as FM1@DTSEC1
FM2 Network Ports
Port 0 is named as FM2@DTSEC1
Port 1 is named as FM2@DTSEC2
Port 2 is named as FM2@DTSEC3
Port 3 is named as FM2@DTSEC4
Port 4 (XAUI) is named as FM2@TGEC1