# # This file is part of LiteDRAM. # # Copyright (c) 2018-2019 Florent Kermarrec # Copyright (c) 2020 Antmicro # SPDX-License-Identifier: BSD-2-Clause import unittest from migen import * from litex.gen.sim import run_simulation from litex.soc.interconnect import wishbone from litedram.frontend.wishbone import LiteDRAMWishbone2Native from litedram.common import LiteDRAMNativePort from test.common import DRAMMemory, MemoryTestDataMixin class TestWishbone(MemoryTestDataMixin, unittest.TestCase): def wishbone_readback_test(self, pattern, mem_expected, wishbone, port, base_address=0): class DUT(Module): def __init__(self): self.port = port self.wb = wishbone self.submodules += LiteDRAMWishbone2Native( wishbone = self.wb, port = self.port, base_address = base_address) self.mem = DRAMMemory(port.data_width, len(mem_expected)) def main_generator(dut): for adr, data in pattern: yield from dut.wb.write(adr, data) data_r = (yield from dut.wb.read(adr)) self.assertEqual(data_r, data) dut = DUT() generators = [ main_generator(dut), dut.mem.write_handler(dut.port), dut.mem.read_handler(dut.port), ] run_simulation(dut, generators, vcd_name='sim.vcd') self.assertEqual(dut.mem.mem, mem_expected) def test_wishbone_8bit(self): # Verify Wishbone with 8-bit data width. data = self.pattern_test_data["8bit"] wb = wishbone.Interface(adr_width=30, data_width=8) port = LiteDRAMNativePort("both", address_width=30, data_width=8) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_32bit(self): # Verify Wishbone with 32-bit data width. data = self.pattern_test_data["32bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=32) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_64bit(self): # Verify Wishbone with 64-bit data width. data = self.pattern_test_data["64bit"] wb = wishbone.Interface(adr_width=30, data_width=64) port = LiteDRAMNativePort("both", address_width=30, data_width=64) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_64bit_to_32bit(self): # Verify Wishbone with 64-bit data width down-converted to 32-bit data width. data = self.pattern_test_data["64bit_to_32bit"] wb = wishbone.Interface(adr_width=30, data_width=64) port = LiteDRAMNativePort("both", address_width=30, data_width=32) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_32bit_to_8bit(self): # Verify Wishbone with 32-bit data width down-converted to 8-bit data width. data = self.pattern_test_data["32bit_to_8bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=8) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_8bit_to_32bit(self): # Verify Wishbone with 8-bit data width up-converted to 32-bit data width. data = self.pattern_test_data["8bit_to_32bit"] wb = wishbone.Interface(adr_width=30, data_width=8) port = LiteDRAMNativePort("both", address_width=30, data_width=32) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_32bit_to_64bit(self): # Verify Wishbone with 32-bit data width up-converted to 64-bit data width. data = self.pattern_test_data["32bit_to_64bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=64) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_32bit_to_128bit(self): # Verify Wishbone with 32-bit data width up-converted to 128-bit data width. data = self.pattern_test_data["32bit_to_128bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=128) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_32bit_to_256bit(self): # Verify Wishbone with 32-bit data width up-converted to 128-bit data width. data = self.pattern_test_data["32bit_to_256bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=256) self.wishbone_readback_test(data["pattern"], data["expected"], wb, port) def test_wishbone_32bit_base_address(self): # Verify Wishbone with 32-bit data width and non-zero base address. data = self.pattern_test_data["32bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=32) origin = 0x10000000 # add offset (in data words) pattern = [(adr + origin//(32//8), data) for adr, data in data["pattern"]] self.wishbone_readback_test(pattern, data["expected"], wb, port, base_address=origin) def test_wishbone_64bit_to_32bit_base_address(self): # Verify Wishbone with 64-bit data width down-converted to 32-bit data width and non-zero base address. data = self.pattern_test_data["64bit_to_32bit"] wb = wishbone.Interface(adr_width=30, data_width=64) port = LiteDRAMNativePort("both", address_width=30, data_width=32) origin = 0x10000000 pattern = [(adr + origin//(64//8), data) for adr, data in data["pattern"]] self.wishbone_readback_test(pattern, data["expected"], wb, port, base_address=origin) def test_wishbone_32bit_to_8bit_base_address(self): # Verify Wishbone with 32-bit data width down-converted to 8-bit data width and non-zero base address. data = self.pattern_test_data["32bit_to_8bit"] wb = wishbone.Interface(adr_width=30, data_width=32) port = LiteDRAMNativePort("both", address_width=30, data_width=8) origin = 0x10000000 pattern = [(adr + origin//(32//8), data) for adr, data in data["pattern"]] self.wishbone_readback_test(pattern, data["expected"], wb, port, base_address=origin)