355 lines
8.3 KiB
Python
355 lines
8.3 KiB
Python
import math, copy
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from liteeth.common import *
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from liteeth.test.common import *
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from liteeth.test.model import udp
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def print_etherbone(s):
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print_with_prefix(s, "[ETHERBONE]")
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# Etherbone model
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class EtherboneWrite:
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def __init__(self, data):
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self.data = data
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def __repr__(self):
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return "WR32 0x{:08x}".format(self.data)
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class EtherboneRead:
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def __init__(self, addr):
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self.addr = addr
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def __repr__(self):
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return "RD32 @ 0x{:08x}".format(self.addr)
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class EtherboneWrites(Packet):
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def __init__(self, init=[], base_addr=0, datas=[]):
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Packet.__init__(self, init)
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self.base_addr = base_addr
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self.writes = []
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self.encoded = init != []
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for data in datas:
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self.add(EtherboneWrite(data))
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def add(self, write):
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self.writes.append(write)
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def get_datas(self):
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datas = []
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for write in self.writes:
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datas.append(write.data)
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return datas
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def encode(self):
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if self.encoded:
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raise ValueError
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for byte in split_bytes(self.base_addr, 4):
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self.append(byte)
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for write in self.writes:
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for byte in split_bytes(write.data, 4):
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self.append(byte)
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self.encoded = True
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def decode(self):
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if not self.encoded:
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raise ValueError
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base_addr = []
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for i in range(4):
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base_addr.append(self.pop(0))
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self.base_addr = merge_bytes(base_addr)
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self.writes = []
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while len(self) != 0:
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write = []
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for i in range(4):
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write.append(self.pop(0))
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self.writes.append(EtherboneWrite(merge_bytes(write)))
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self.encoded = False
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def __repr__(self):
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r = "Writes\n"
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r += "--------\n"
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r += "BaseAddr @ 0x{:08x}\n".format(self.base_addr)
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for write in self.writes:
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r += write.__repr__() + "\n"
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return r
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class EtherboneReads(Packet):
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def __init__(self, init=[], base_ret_addr=0, addrs=[]):
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Packet.__init__(self, init)
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self.base_ret_addr = base_ret_addr
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self.reads = []
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self.encoded = init != []
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for addr in addrs:
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self.add(EtherboneRead(addr))
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def add(self, read):
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self.reads.append(read)
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def get_addrs(self):
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addrs = []
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for read in self.reads:
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addrs.append(read.addr)
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return addrs
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def encode(self):
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if self.encoded:
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raise ValueError
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for byte in split_bytes(self.base_ret_addr, 4):
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self.append(byte)
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for read in self.reads:
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for byte in split_bytes(read.addr, 4):
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self.append(byte)
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self.encoded = True
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def decode(self):
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if not self.encoded:
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raise ValueError
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base_ret_addr = []
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for i in range(4):
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base_ret_addr.append(self.pop(0))
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self.base_ret_addr = merge_bytes(base_ret_addr)
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self.reads = []
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while len(self) != 0:
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read = []
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for i in range(4):
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read.append(self.pop(0))
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self.reads.append(EtherboneRead(merge_bytes(read)))
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self.encoded = False
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def __repr__(self):
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r = "Reads\n"
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r += "--------\n"
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r += "BaseRetAddr @ 0x{:08x}\n".format(self.base_ret_addr)
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for read in self.reads:
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r += read.__repr__() + "\n"
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return r
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class EtherboneRecord(Packet):
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def __init__(self, init=[]):
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Packet.__init__(self, init)
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self.writes = None
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self.reads = None
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self.encoded = init != []
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def get_writes(self):
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if self.wcount == 0:
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return None
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else:
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writes = []
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for i in range((self.wcount+1)*4):
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writes.append(self.pop(0))
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return EtherboneWrites(writes)
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def get_reads(self):
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if self.rcount == 0:
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return None
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else:
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reads = []
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for i in range((self.rcount+1)*4):
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reads.append(self.pop(0))
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return EtherboneReads(reads)
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def decode(self):
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if not self.encoded:
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raise ValueError
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header = []
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for byte in self[:etherbone_record_header_len]:
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header.append(self.pop(0))
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for k, v in sorted(etherbone_record_header.items()):
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setattr(self, k, get_field_data(v, header))
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self.writes = self.get_writes()
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if self.writes is not None:
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self.writes.decode()
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self.reads = self.get_reads()
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if self.reads is not None:
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self.reads.decode()
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self.encoded = False
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def set_writes(self, writes):
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self.wcount = len(writes.writes)
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writes.encode()
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for byte in writes:
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self.append(byte)
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def set_reads(self, reads):
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self.rcount = len(reads.reads)
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reads.encode()
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for byte in reads:
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self.append(byte)
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def encode(self):
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if self.encoded:
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raise ValueError
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if self.writes is not None:
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self.set_writes(self.writes)
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if self.reads is not None:
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self.set_reads(self.reads)
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header = 0
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for k, v in sorted(etherbone_record_header.items()):
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value = merge_bytes(split_bytes(getattr(self, k), math.ceil(v.width/8)), "little")
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header += (value << v.offset+(v.byte*8))
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for d in split_bytes(header, etherbone_record_header_len):
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self.insert(0, d)
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self.encoded = True
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def __repr__(self, n=0):
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r = "Record {}\n".format(n)
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r += "--------\n"
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if self.encoded:
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for d in self:
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r += "{:02x}".format(d)
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else:
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for k in sorted(etherbone_record_header.keys()):
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r += k + " : 0x{:0x}\n".format(getattr(self,k))
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if self.wcount != 0:
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r += self.writes.__repr__()
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if self.rcount != 0:
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r += self.reads.__repr__()
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return r
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class EtherbonePacket(Packet):
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def __init__(self, init=[]):
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Packet.__init__(self, init)
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self.encoded = init != []
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self.records = []
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self.magic = etherbone_magic
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self.version = etherbone_version
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self.addr_size = 32//8
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self.port_size = 32//8
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self.nr = 0
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self.pr = 0
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self.pf = 0
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def get_records(self):
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records = []
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done = False
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payload = self
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while len(payload) != 0:
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record = EtherboneRecord(payload)
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record.decode()
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records.append(copy.deepcopy(record))
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payload = record
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return records
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def decode(self):
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if not self.encoded:
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raise ValueError
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header = []
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for byte in self[:etherbone_packet_header_len]:
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header.append(self.pop(0))
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for k, v in sorted(etherbone_packet_header.items()):
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setattr(self, k, get_field_data(v, header))
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self.records = self.get_records()
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self.encoded = False
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def set_records(self, records):
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for record in records:
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record.encode()
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for byte in record:
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self.append(byte)
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def encode(self):
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if self.encoded:
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raise ValueError
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self.set_records(self.records)
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header = 0
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for k, v in sorted(etherbone_packet_header.items()):
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value = merge_bytes(split_bytes(getattr(self, k), math.ceil(v.width/8)), "little")
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header += (value << v.offset+(v.byte*8))
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for d in split_bytes(header, etherbone_packet_header_len):
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self.insert(0, d)
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self.encoded = True
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def __repr__(self):
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r = "Packet\n"
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r += "--------\n"
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if self.encoded:
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for d in self:
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r += "{:02x}".format(d)
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else:
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for k in sorted(etherbone_packet_header.keys()):
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r += k + " : 0x{:0x}\n".format(getattr(self,k))
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for i, record in enumerate(self.records):
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r += record.__repr__(i)
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return r
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class Etherbone(Module):
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def __init__(self, udp, debug=False):
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self.udp = udp
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self.debug = debug
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self.tx_packets = []
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self.tx_packet = EtherbonePacket()
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self.rx_packet = EtherbonePacket()
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udp.set_etherbone_callback(self.callback)
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def send(self, packet):
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packet.encode()
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if self.debug:
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print_etherbone(">>>>>>>>")
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print_etherbone(packet)
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udp_packet = udp.UDPPacket(packet)
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udp_packet.src_port = 0x1234 # XXX
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udp_packet.dst_port = 20000 # XXX
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udp_packet.length = len(packet)
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udp_packet.checksum = 0
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self.udp.send(udp_packet)
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def receive(self):
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self.rx_packet = EtherbonePacket()
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while not self.rx_packet.done:
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yield
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def callback(self, packet):
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packet = EtherbonePacket(packet)
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packet.decode()
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if self.debug:
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print_etherbone("<<<<<<<<")
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print_etherbone(packet)
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self.rx_packet = packet
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self.rx_packet.done = True
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self.process(packet)
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def process(self, packet):
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pass
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if __name__ == "__main__":
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# Writes/Reads
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writes = EtherboneWrites(base_addr=0x1000, datas=[i for i in range(16)])
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reads = EtherboneReads(base_ret_addr=0x2000, addrs=[i for i in range(16)])
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# Record
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record = EtherboneRecord()
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record.writes = writes
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record.reads = reads
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record.bca = 0
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record.rca = 0
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record.rff = 0
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record.cyc = 0
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record.wca = 0
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record.wff = 0
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record.byte_enable = 0
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record.wcount = len(writes.get_datas())
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record.rcount = len(reads.get_addrs())
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# Packet
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packet = EtherbonePacket()
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packet.records = [copy.deepcopy(record) for i in range(8)]
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packet.nr = 0
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packet.pr = 0
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packet.pf = 0
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#print(packet)
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packet.encode()
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#print(packet)
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# Send packet over UDP to check against Wireshark dissector
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import socket
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sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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sock.sendto(bytes(packet), ("192.168.1.1", 20000))
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packet = EtherbonePacket(packet)
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packet.decode()
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print(packet)
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