diff options
Diffstat (limited to 'icefuzz/tests/spram/fuzz_spram.py')
| -rwxr-xr-x | icefuzz/tests/spram/fuzz_spram.py | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/icefuzz/tests/spram/fuzz_spram.py b/icefuzz/tests/spram/fuzz_spram.py new file mode 100755 index 0000000..33e62cb --- /dev/null +++ b/icefuzz/tests/spram/fuzz_spram.py @@ -0,0 +1,173 @@ +#!/usr/bin/env python3 + +import os, sys, re + +device = "up5k" + +pins = "2 3 4 6 9 10 11 12 13 18 19 20 21 25 26 27 28 31 32 34 35 36 37 38 42 43 44 45 46 47 48".split() + +# This script is designed to determine the routing of 5k SPRAM signals, +# and the location of the enable config bits + +spram_locs = [(0, 0, 1), (0, 0, 2), (25, 0, 3), (25, 0, 4)] +#spram_locs = [(0, 0, 1)] +spram_data = { } + +spram_signals = ["WREN", "CHIPSELECT", "CLOCK", "STANDBY", "SLEEP", "POWEROFF"] + +for i in range(14): + spram_signals.append("ADDRESS[%d]" % i) + +for i in range(16): + spram_signals.append("DATAIN[%d]" % i) + +for i in range(16): + spram_signals.append("DATAOUT[%d]" % i) + +for i in range(4): + spram_signals.append("MASKWREN[%d]" % i) + +fuzz_options = ["ADDRESS", "DATAIN", "MASKWREN", "DATAOUT"] + +#Parse the output of an icebox vlog file to determine connectivity +def parse_vlog(f, pin2net, net_map): + current_net = None + + for line in f: + m = re.match(r"wire ([a-zA-Z0-9_]+);", line) + if m: + net = m.group(1) + mp = re.match(r"pin_([a-zA-Z0-9]+)", net) + if mp: + pin = mp.group(1) + if pin in pin2net: + current_net = pin2net[pin] + else: + current_net = None + else: + current_net = None + elif current_net is not None: + m = re.match(r"// \((\d+), (\d+), '([a-zA-Z0-9_/]+)'\)", line) + if m: + x = int(m.group(1)) + y = int(m.group(2)) + net = m.group(3) + if not (net.startswith("sp") or net.startswith("glb") or net.startswith("neigh") or net.startswith("io") or net.startswith("local") or net.startswith("fabout")): + net_map[current_net].add((x, y, net)) +def parse_exp(f): + current_x = 0 + current_y = 0 + bits = set() + for line in f: + splitline = line.split(' ') + if splitline[0].endswith("_tile"): + current_x = int(splitline[1]) + current_y = int(splitline[2]) + elif splitline[0] == "IpConfig": + if splitline[1][:5] == "CBIT_": + bitidx = int(splitline[1][5:]) + bits.add((current_x, current_y, splitline[1].strip())) + return bits + +if not os.path.exists("./work_spram"): + os.mkdir("./work_spram") + +for loc in spram_locs: + x, y, z = loc + net_map = {} + for sig in spram_signals: + net_map[sig] = set() + net_map["C_SPRAM_EN"] = set() # actually a CBIT not a net + + for n in fuzz_options: + with open("./work_spram/spram.v","w") as f: + print(""" + module top( + input WREN, + input CHIPSELECT, + input CLOCK, + input STANDBY, + input SLEEP, + input POWEROFF, + """, file=f) + if n == "ADDRESS": + print("\t\t\tinput [13:0] ADDRESS,", file=f) + if n == "DATAIN": + print("\t\t\tinput [15:0] DATAIN,", file=f) + if n == "MASKWREN": + print("\t\t\tinput [3:0] MASKWREN,", file=f) + if n == "DATAOUT": + print("\t\t\toutput [15:0] DATAOUT);", file=f) + else: + print("\t\t\toutput [0:0] DATAOUT);", file=f) #some dataout is always required to prevent optimisation away + + addr_net = "ADDRESS" if n == "ADDRESS" else "" + din_net = "DATAIN" if n == "DATAIN" else "" + mwren_net = "MASKWREN" if n == "MASKWREN" else "" + + print(""" + SB_SPRAM256KA spram_i + ( + .ADDRESS(%s), + .DATAIN(%s), + .MASKWREN(%s), + .WREN(WREN), + .CHIPSELECT(CHIPSELECT), + .CLOCK(CLOCK), + .STANDBY(STANDBY), + .SLEEP(SLEEP), + .POWEROFF(POWEROFF), + .DATAOUT(DATAOUT) + ); + """ % (addr_net, din_net, mwren_net), file=f) + print("endmodule",file=f) + pin2net = {} + with open("./work_spram/spram.pcf","w") as f: + temp_pins = list(pins) + for sig in spram_signals: + if sig.startswith("ADDRESS") and n != "ADDRESS": + continue + if sig.startswith("DATAIN") and n != "DATAIN": + continue + if sig.startswith("MASKWREN") and n != "MASKWREN": + continue + if sig.startswith("DATAOUT") and n != "DATAOUT" and sig != "DATAOUT[0]": + continue + + if len(temp_pins) == 0: + sys.stderr.write("ERROR: no remaining pins to alloc") + sys.exit(1) + + pin = temp_pins.pop() + pin2net[pin] = sig + print("set_io %s %s" % (sig, pin), file=f) + print("set_location spram_i %d %d %d" % loc, file=f) + retval = os.system("bash ../../icecube.sh -" + device + " ./work_spram/spram.v > ./work_spram/icecube.log 2>&1") + if retval != 0: + sys.stderr.write('ERROR: icecube returned non-zero error code\n') + sys.exit(1) + retval = os.system("../../../icebox/icebox_explain.py ./work_spram/spram.asc > ./work_spram/spram.exp") + if retval != 0: + sys.stderr.write('ERROR: icebox_explain returned non-zero error code\n') + sys.exit(1) + retval = os.system("../../../icebox/icebox_vlog.py -l ./work_spram/spram.asc > ./work_spram/spram.vlog") + if retval != 0: + sys.stderr.write('ERROR: icebox_vlog returned non-zero error code\n') + sys.exit(1) + with open("./work_spram/spram.vlog", "r") as f: + parse_vlog(f, pin2net, net_map) + bits = [] + with open("./work_spram/spram.exp", "r") as f: + bits = parse_exp(f) + net_map["C_SPRAM_EN"].update(bits) + spram_data[loc] = net_map + +with open(device + "_spram_data.txt", "w") as f: + for loc in spram_data: + print("SPRAM %d %d %d" % loc, file=f) + data = spram_data[loc] + for net in sorted(data): + cnets = [] + for cnet in data[net]: + cnets.append("(%d, %d, %s)" % cnet) + print("\t%s: %s" % (net, " ".join(cnets)), file=f)
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