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ecp5: Add support for mapping 36-bit wide PDP BRAMs

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-10-01 13:46:36 +01:00
parent d963e8c2c6
commit 7a1538cd36
6 changed files with 183 additions and 1 deletions
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20
techlibs/ecp5/brams_connect.py
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@ -10,6 +10,18 @@ def write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits):
print(" %s," % ", ".join(dia_conn), file=f)
print(" %s," % ", ".join(dob_conn), file=f)
def write_bus_ports_pdp(f, adw_bits, adr_bits, di_bits, do_bits, be_bits):
adw_conn = [".ADW%d(%s)" % (i, adw_bits[i]) for i in range(len(adw_bits))]
adr_conn = [".ADR%d(%s)" % (i, adr_bits[i]) for i in range(len(adr_bits))]
di_conn = [".DI%d(%s)" % (i, di_bits[i]) for i in range(len(di_bits))]
do_conn = [".DO%d(%s)" % (i, do_bits[i]) for i in range(len(do_bits))]
be_conn = [".BE%d(%s)" % (i, be_bits[i]) for i in range(len(be_bits))]
print(" %s," % ", ".join(adw_conn), file=f)
print(" %s," % ", ".join(adr_conn), file=f)
print(" %s," % ", ".join(di_conn), file=f)
print(" %s," % ", ".join(do_conn), file=f)
print(" %s," % ", ".join(be_conn), file=f)
with open("techlibs/ecp5/bram_conn_1.vh", "w") as f:
ada_bits = ["A1ADDR[%d]" % i for i in range(14)]
adb_bits = ["B1ADDR[%d]" % i for i in range(14)]
@ -44,3 +56,11 @@ with open("techlibs/ecp5/bram_conn_18.vh", "w") as f:
dia_bits = ["A1DATA[%d]" % i for i in range(18)]
dob_bits = ["B1DATA[%d]" % i for i in range(18)]
write_bus_ports(f, ada_bits, adb_bits, dia_bits, dob_bits)
with open("techlibs/ecp5/bram_conn_36.vh", "w") as f:
adw_bits = ["A1ADDR[%d]" % i for i in range(9)]
adr_bits = ["1'b0", "1'b0", "1'b0", "1'b0", "1'b0"] + ["B1ADDR[%d]" % i for i in range(9)]
di_bits = ["A1DATA[%d]" % i for i in range(36)]
do_bits = ["B1DATA[%d]" % (i + 18) for i in range(18)] + ["B1DATA[%d]" % i for i in range(18)]
be_bits = ["A1EN[%d]" % i for i in range(4)]
write_bus_ports_pdp(f, adw_bits, adr_bits, di_bits, do_bits, be_bits)