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Gaisler Ethernet MAC enableCONFIG_GRETH_ENABLE Say Y here to enable the Gaisler Research Ethernet MAC . The MAC has one AHB master interface to read and write packets to memory, and one APB slave interface for accessing the control registers. Gaisler Ethernet 1G MAC enableCONFIG_GRETH_GIGA Say Y here to enable the Gaisler Research 1000 Mbit Ethernet MAC . The 1G MAC is only available in the commercial version of GRLIB, so do NOT enable it if you are using the GPL version.CONFIG_GRETH_FIFO4 Set the depth of the receive and transmit FIFOs in the MAC core. The MAC core will perform AHB burst read/writes with half the size of the FIFO depth.
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