litex/liteeth/__init__.py

from liteeth.common import *
from liteeth.generic.arbiter import Arbiter
from liteeth.generic.dispatcher import Dispatcher
from liteeth.mac import LiteEthMAC

class LiteEthIPStack(Module, AutoCSR):
	def __init__(self, phy,
			mac_address= 0x12345678abcd,
			ip_address="192.168.0.10"):
		self.phy = phy
		self.submodules.mac = mac = LiteEthMAC(phy, 8, interface="mac", with_hw_preamble_crc=True)
		self.submodules.arp = arp = LiteEthARP(mac_address, ip_address)
		self.submodules.ip = ip = LiteEthMACIP()

		# MAC dispatch
		self.submodules.mac_dispatcher = mac_dispatcher = Dispatcher(mac.source, [arp.sink, ip.sink], one_hot=True)
		self.comb += \
			Case(mac.source.eth_type, {
				ethernet_type_arp	: [mac_dispatcher.sel.eq(1)],
				ethernet_type_ip	: [mac_dispatcher.sel.eq(2)],
				"default"			: [mac_dispatcher.sel.eq(0)],
			})
		# MAC arbitrate
		self.submodules.mac_arbiter = mac_arbiter = Arbiter([arp.source, ip.source], mac.sink)