This is currently implemented in net/eth.c
Look in include/net.h for details.
+config DRIVER_TI_CPSW
+ bool "TI Common Platform Ethernet Switch"
+ select PHYLIB
+ help
+ This driver supports the TI three port switch gigabit ethernet
+ subsystem found in the TI SoCs.
+
menuconfig NETDEVICES
bool "Network device support"
depends on NET