test: add PHY model skeleton

liteeth/test/Makefile

@@ -3,11 +3,8 @@ PYTHON = python3
 
 CMD = PYTHONPATH=$(MSCDIR) $(PYTHON)
 
-mac_crc_tb:
-	$(CMD) mac_crc_tb.py
+mac_core_tb:
+	$(CMD) mac_core_tb.py
 
-mac_preamble_tb:
-	$(CMD) mac_preamble_preamble_tb.py
-
-ethmac_tb:
-	$(CMD) ethmac_tb.py
+mac_wishbone_tb:
+	$(CMD) mac_wishbone_tb.py

liteeth/test/common.py

@@ -6,6 +6,13 @@ from migen.genlib.record import *
 
 from misoclib.ethmac.common import *
 
+def print_with_prefix(s, prefix=""):
+	if not isinstance(s, str):
+		s = s.__repr__()
+	s = s.split("\n")
+	for l in s:
+		print(prefix + l)
+
 def seed_to_data(seed, random=True):
 	if random:
 		return (seed * 0x31415979 + 1) & 0xffffffff

liteeth/test/model/phy.py

@@ -0,0 +1,31 @@
+from liteeth.common import *
+from liteeth.mac.common import *
+from liteeth.test.common import *
+
+# PHY model
+class PHYSource(PacketStreamer):
+	def __init__(self, dw):
+		PacketStreamer.__init__(self, eth_phy_description(dw))
+
+class PHYSink(PacketLogger):
+	def __init__(self, dw):
+		PacketLogger.__init__(self, eth_phy_description(dw))
+
+class PHY(Module):
+	def __init__(self, dw, debug):
+		self.dw = dw
+		self.debug = debug
+
+		self.phy_source = PHYSource(dw)
+		self.phy_sink = PHYSink(dw)
+
+		self.source = self.phy_source.source
+		self.sink = self.phy_sink.sink
+
+	def send(self, datas, blocking=True):
+		packet = Packet(datas)
+		yield from self.phy_source.send(packet, blocking)
+
+	def receive(self):
+		yield from self.phy_sink.receive()
+		self.packet = self.phy_sink.packet