def up_tick():
if s.state == s.XCFG:
# Dequeue a request message from input queue and send response.
if s.in_q.deq.rdy() and s.xcel.resp.rdy():
req = s.in_q.deq()
if req.type_ == RD:
s.xcel.resp(s.RespType(RD, s.reg_file[int(req.addr)]))
elif req.type_ == WR:
s.reg_file[int(req.addr)] = req.data
s.xcel.resp(s.RespType(WR, 0))
# If the go bit is written
if req.addr == 4:
if s.checksum_unit.recv.rdy():
s.state = s.BUSY
words = s.get_words()
s.checksum_unit.recv(words_to_b128(words))
else:
s.state = s.WAIT
elif s.state == s.WAIT:
if s.checksum_unit.recv.rdy():
words = s.get_words()
s.checksum_unit.recv(words_to_b128(words))
s.state = s.BUSY
else: # s.state == s.BUSY
if s.out_q.deq.rdy():
s.reg_file[5] = s.out_q.deq()
s.state = s.XCFG
def mk_xcel_transaction(words):
words = [b16(x) for x in words]
bits = words_to_b128(words)
reqs = []
reqs.append(Req(wr, 0, bits[0:32]))
reqs.append(Req(wr, 1, bits[32:64]))
reqs.append(Req(wr, 2, bits[64:96]))
reqs.append(Req(wr, 3, bits[96:128]))
reqs.append(Req(wr, 4, 1))
reqs.append(Req(rd, 5, 0))
resps = []
resps.append(Resp(wr, 0))
resps.append(Resp(wr, 0))
resps.append(Resp(wr, 0))
resps.append(Resp(wr, 0))
resps.append(Resp(wr, 0))
resps.append(Resp(rd, checksum(words)))
return reqs, resps
def mk_xcel_transaction( words ): words = [ b16(x) for x in words ] bits = words_to_b128( words ) reqs = [] reqs.append( Req( wr, b5(0), bits[0 :32 ] ) ) reqs.append( Req( wr, b5(1), bits[32:64 ] ) ) reqs.append( Req( wr, b5(2), bits[64:96 ] ) ) reqs.append( Req( wr, b5(3), bits[96:128] ) ) reqs.append( Req( wr, b5(4), b32(1) ) ) reqs.append( Req( rd, b5(5), b32(0) ) ) resps = [] resps.append( Resp( wr, b32(0) ) ) resps.append( Resp( wr, b32(0) ) ) resps.append( Resp( wr, b32(0) ) ) resps.append( Resp( wr, b32(0) ) ) resps.append( Resp( wr, b32(0) ) ) resps.append( Resp( rd, checksum(words) ) ) return reqs, resps